Rig Risk Assessment

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Juunnee22000099 DDRRAAFFTT

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OppeerraattiioonnaallPhPhaassee AA Categorization of the hazard scenario by operational phase.Categorization of the hazard scenario by operational phase.

IItteemm BB te! nu!ber for hazards.te! nu!ber for hazards.

U

UBBDD//MMPPDD//BBootthh CC dentification of "hether the hazard applies to #$D% &'D or $oth ($)dentification of "hether the hazard applies to #$D% &'D or $oth ($) H

Haazzaarrd d !!eennaarriio o ""hhaat t II## DD A

Appppllii!!aa$$llee %% Choose *+* if *,azard -cenario hat f* applies to operation and */* if it does not.Choose *+* if *,azard -cenario hat f* applies to operation and */* if it does not. &

&hhrreeaattss//CCoonnssee''uueenn!!eess (( A list of the potential conseuences (,-1 and /'T) of the *"hat if* occurring. A list of the potential conseuences (,-1 and /'T) of the *"hat if* occurring. H

H%% )) The ris of a situation3e4ent "ith the potential to cause har! (to people% assets% or the en4iron!ent).The ris of a situation3e4ent "ith the potential to cause har! (to people% assets% or the en4iron!ent). *

*PP&& HH

R

Ree''uuiirreed Hd H% C% Crriittii!!aal Cl Coonnttrroolls / s / aa##eegguuaarrddss OO C

Coonnssiiddeerraattiioonnss ++

A

A!!ttiioonns s tto o $$e e &&aakkeen n / / BB, , ""hho o aannd d ""hheenn -

-P

Prriimmaarr, , RReessppoonnssii$$lle e PPaarrtt,, .. Categorization of the hazard scenario by pCategorization of the hazard scenario by p ri!ary responsible party.ri!ary responsible party. P

Prriimmaarr,,CCaatteeggoorr,, MM Categorization of the hazard scenario by pri!ary category (euip!ent% "ell progra!% etc.)Categorization of the hazard scenario by pri!ary category (euip!ent% "ell progra!% etc.)

Risk Ranking  se0erit, o# the e0ent 1!onse'uen!e multiplied $, likelihood o# o!!urren!e

3

2

4

4 )eneral *otes a$out Register

)eneral *otes a$out Register

Register is di4ided into 5 sections% coinciding "ith the operational phases of #$D3&'D3AD operations.

Column

.etter

-ingle 6eopardy state!ent used to identify potential proble!s due to failure in pre76ob planning% training% procedures% or -ingle 6eopardy state!ent used to identify potential proble!s due to failure in pre76ob planning% training% procedures% or euip!ent failure.

euip!ent failure.

The ris of /on 'roducti4e Ti!e (/'T)% including lost ti!e

The ris of /on 'roducti4e Ti!e (/'T)% including lost ti!e and costs% for!ation da!age and3oand costs% for!ation da!age and3o r any de4iation fro! ther any de4iation fro! the plan.

plan.

Controls3safeguards% and detailed reco!!ended practices

Controls3safeguards% and detailed reco!!ended practices for high ris ,-1 ite!s and reffor high ris ,-1 ite!s and ref erenced to specific prescripti4eerenced to specific prescripti4e R' 22 enforced reuire!ents.

R' 22 enforced reuire!ents.

Reco!!endations% considerations% and infor!ational state!ents on ho" to reduce% eli!inate% or !anage &ediu!38o" Reco!!endations% considerations% and infor!ational state!ents on ho" to reduce% eli!inate% or !anage &ediu!38o" Ris ,-1 ite!s and all /'T ite!s.

Ris ,-1 ite!s and all /'T ite!s.

8ist of actions reuired to reduce3eli!inate the potential occurrence and3or se4erity if the hazard cannot be eli!inated 8ist of actions reuired to reduce3eli!inate the potential occurrence and3or se4erity if the hazard cannot be eli!inated entirely.

entirely.

ho  'arty3parties responsible for each action assigned. ho  'arty3parties responsible for each action assigned. hen  Date by "hich the action is to be co!pleted. hen  Date by "hich the action is to be co!pleted.

High Risk

7 1ngineering% 'rocedures% and Training reuired to control3!itigate ris.

Medium Risk

7 'rocedures and

7 'rocedures and Training reuired to

Training reuired to control3!i

control3!i tigate ris.

tigate ris. -hould consider 1ngineering.

-hould consider 1ngineering.

.o5 Risk

.o5 Risk 7

7 Training reuired to control3!itigate ris.

Training reuired to control3!itigate ris. -hould consider 1ngineering and

-hould consider 1ngineering and 'rocedures.

'rocedures.

Additiona

Additional ite!s !ay

l ite!s !ay be add

be added to ea

ed to each section

ch section by the 

by the R' co!!it

R' co!!ittee or the e

tee or the end user

nd user.

. The list of

The list of ite!s in the

ite!s in the register is no

register is not e:hau

t e:hausti4e and

sti4e and "ill chang

"ill change "ith t

e "ith ti!e as

i!e as

additional hazards are identified. 8ast ite! nu!ber used (as of 20;<70=7;;) is> 225 $egin any additional nu!bering "ith 229. /ote that ?;<2 "as deleted as it "as

redundant.

The R' 22 Co!!ittee in4ites organizations to share lessons learned and additions to the

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2 2ooff22 00BB33;;00332200;; DDRRAAFFTT A A p p p p l l _H_H_*_*

A!tions to $e taken / B, "ho and "hen A!tions to $e taken / B, "ho and "hen

;

;..''llaannnniinngg ;; $$TT,, ++ ;; ;; RiRig Cg Conontrtracactotorr RiRig 1g 1uiuip!p!enentt

;

;. . ''llaannnniinngg 22 $$TT,, 88eeaasse e ssiizze e iinnaaddeeuuaattee ++ ;; ;; -eparation-eparation

;

;..''llaannnniinngg == $$TT,, ++ ;; ;; 22.=.B22.=.B

;

;. . ''llaannnniinngg BB $$TT,, !!pprrooppeer r rriig g aalliiggnn!!eenntt ++ ;; ;; 2222..22....== RRiiggCCoonnttrraaccttoorr RRCCDD

;

;..''llaannnniinngg << $$TT,, ++ ;; ;; -eparation-eparation

;

;. . ''llaannnniinngg 2222== &&''DD &&''D D 11uuiipp!!eennt t RReennttaall ++ ;; ;;

;

;..''llaannnniinngg  $$TT,, ++ ;; ;; 2222..22..BB..;; ChChooee33FFlloo""lliinnee

;

;..''llaannnniinngg  ##$$DD ++ ;; ;; 2222..;;..==..;; eellll''rrooggrraa!!

;

;. . ''llaannnniinngg 55 $$TT,, CCoonnddeennssaatte e ccaarrrryyoo44eerr ++ ;; ;; ell 'rogra!ell 'rogra!

;

;..''llaannnniinngg 99 $$TT,, ++ ;; ;; 2222..==..;;== ''uurrggee""iitthhaanniinneerrttggaass.. --eeppaarraattiioonn

;

;. . ''llaannnniinngg ;;00 $$TT,, $$aarrrriieer r FFaaiilluurree ++ ;; ;; ell 'rogra!ell 'rogra!

;

;..''llaannnniinngg ;;;; $$TT,, ++ ;; ;; Applicable pro4incial regulations to be Applicable pro4incial regulations to be follo"ed.follo"ed. -eparation-eparation

;

;. . ''llaannnniinngg ;;22 $$TT,, ++ ''ootteennttiiaal l ffoor r iinn66uurryy33ddeeaatthh.. ;; ;; 2222..==..;;== 8e8eaassee&&aannaaggee!!eenntt

Phase

Phase _Both_Both "hat I# 6"hat I# 6 _a#eguards_a#eguards _Part,_Part, Categor,Categor,

!proper elly (suare !proper elly (suare 4s. he:) 4s. he:) RCD leaage. RCD leaage. n6ury to personnel. n6ury to personnel.

#nable to run suare elly through #nable to run suare elly through RCD.

RCD.

Delay in drilling "ell (lost ti!e and Delay in drilling "ell (lost ti!e and cost). cost). 22.;.=.2 22.;.=.2 22.2.2.= 22.2.2.= 22.2..= 22.2..=

#se he: elly% suare elly not reco!!ended. #se he: elly% suare elly not reco!!ended. #se po"er s"i4el instead of elly. #se po"er s"i4el instead of elly. #se top dri4e instead of #se top dri4e instead of elly.elly. #se coiled tubing. #se coiled tubing.

RCD supplier standard operating procedures 3 RCD supplier standard operating procedures 3 ris register.

ris register. Drill string diagra!. Drill string diagra!. 'oor e!ergency response.

'oor e!ergency response. 'roble!s fitting euip!ent on 'roble!s fitting euip!ent on location.

location.

Decreased access3egress in case of Decreased access3egress in case of e!ergency.

e!ergency.

nadeuate flare spacing on location. nadeuate flare spacing on location. Tree clearance could cause forest fire. Tree clearance could cause forest fire. Delay in rig up and startup of Delay in rig up and startup of operations operations 22.;.=.B 22.;.=.B 22.=.=.; 22.=.=.;

Eerify rig specific l

Eerify rig specific l ayout accuracy.ayout accuracy. 'ri!ary #$D3&'D ser4ice supplier to 'ri!ary #$D3&'D ser4ice supplier to pro4ide sitepro4ide site specific lease spacing diagra!.

specific lease spacing diagra!.

'ri!ary #$D3&'D ser4ice pro4ider to conduct site 'ri!ary #$D3&'D ser4ice pro4ider to conduct site inspection as soon as possible.

inspection as soon as possible. #se drill side pipe racs only (if #se drill side pipe racs only (if possible).possible). Eerify regulatory stac height3flaring reuire!ents. Eerify regulatory stac height3flaring reuire!ents.

#$D3&'D #$D3&'D -er4ice 'ro4ider -er4ice 'ro4ider

Concurrent rig up of rig Concurrent rig up of rig and #$D3&'D pacage and #$D3&'D pacage causes confusion causes confusion

,ar! to personnel. ,ar! to personnel. 8ost ti!e and cost. 8ost ti!e and cost.

nsite super4isors to for!ulate rig up plan. nsite super4isors to for!ulate rig up plan. Co!pany !an to

Co!pany !an to coordinate o4erall strategy.coordinate o4erall strategy. -afety hand to be in4ol4ed during rig up. -afety hand to be in4ol4ed during rig up.

perating perating Co!pany Co!pany 8ease 8ease Reuire!ents Reuire!ents 'otentially "ash3"ear casing bo"l%

'otentially "ash3"ear casing bo"l% and cause RCD failure or $' failure. and cause RCD failure or $' failure. 'otential loss of "ell control if bo"l 'otential loss of "ell control if bo"l "ears out.

"ears out.

Chec rig align!ent before nippling up Chec rig align!ent before nippling up $'3RCD.$'3RCD. Chec rig align!ent during #$D3&'D operation. Chec rig align!ent during #$D3&'D operation.

!proper separator 7 !proper separator 7 too s!all too s!all

Fluid carryo4er !ay cause a fire% Fluid carryo4er !ay cause a fire% en4iron!ental

en4iron!ental da!age3in6uryda!age3in6ury.. ait on right size ait on right size euip!ent.euip!ent.

22.;.=.B 22.;.=.B 22.;.=.< 22.;.=.<

Conduct re4ie" "ith

Conduct re4ie" "ith reser4oir3productioreser4oir3production engineersn engineers regarding potential inflo" rates.

regarding potential inflo" rates.

Re4ie" separator sizing reuire!ents "ith ser4ice Re4ie" separator sizing reuire!ents "ith ser4ice co!pany. co!pany. #$D3&'D #$D3&'D -er4ice 'ro4ider -er4ice 'ro4ider !rproper euip!ent size.

!rproper euip!ent size. nadeuate reuired surface bac nadeuate reuired surface bac pressure.

pressure. 'otential gas 'otential gas inflo".inflo". 'otential "ell control issues. 'otential "ell control issues.

ne" R'22 section ne" R'22 section

T$D T$D

Conduct re4ie" "ith

Conduct re4ie" "ith reser4oir3producreser4oir3production engineerstion engineers regarding potential inflo" rates.

regarding potential inflo" rates.

Re4ie" separator sizing reuire!ents "ith ser4ice Re4ie" separator sizing reuire!ents "ith ser4ice co!pany.

co!pany.

Re4ie" offset infor!ation for the area. Re4ie" offset infor!ation for the area.

&'D 1uip!ent &'D 1uip!ent 'ro4ider 'ro4ider &'D3#$D &'D3#$D 1uip!ent Rental 1uip!ent Rental

Threaded unions are Threaded unions are used in high pressure used in high pressure pipe "or. pipe "or.

'oor uality control in /'T 'oor uality control in /'T threadthread design3!anufacture !ay result in design3!anufacture !ay result in flo"line failure.

flo"line failure.

/o threaded unions to be used

/o threaded unions to be used for other than shippingfor other than shipping lines. lines. #$D3&'D #$D3&'D -er4ice 'ro4ider -er4ice 'ro4ider &e!brane nitrogen is &e!brane nitrogen is used in sour used in sour en4iron!ent en4iron!ent

,igh corrosion rate. ,igh corrosion rate. 'otential fla!!able conditions. 'otential fla!!able conditions.

Consider use of ser4ice gas that does not contain Consider use of ser4ice gas that does not contain o:ygen. o:ygen. perating perating Co!pany Co!pany -pill 7 en4iron!ental da!age

-pill 7 en4iron!ental da!age -tart fire in i!!ediate 4icinity -tart fire in i!!ediate 4icinity

22.;.=.B 22.;.=.B 22.;.=.< 22.;.=.<

Choose appropriately sized separator for flush Choose appropriately sized separator for flush production.

production.

Re4ie" procedures for transient operations (such as Re4ie" procedures for transient operations (such as initial blo"do"n). initial blo"do"n). perating perating Co!pany Co!pany Failure to flush3purge Failure to flush3purge lines% 4essels% surface lines% 4essels% surface euip!ent euip!ent

,

,₂₂- e:posure - e:posure to personnel. to personnel. 8o"8o" 4olu!e% high

4olu!e% high concentration.concentration. 'otential for in6ury3death. 'otential for in6ury3death.

#$D3&'D #$D3&'D -er4ice 'ro4ider -er4ice 'ro4ider 8oss of $

8oss of $ arrier.arrier. 'otential for in6ury3death. 'otential for in6ury3death.

Consider 2 barrier "hen pipe is static. Consider 2 barrier "hen pipe is static. ,igh ,

,igh ,22- content should !ae barrier policy !ore- content should !ae barrier policy !ore

4isible. 4isible. perating perating Co!pany Co!pany nsufficient tan far!

nsufficient tan far! ber!s

ber!s

Release of drilling fluid to Release of drilling fluid to en4iron!ent. en4iron!ent. 22.;.=.B 22.;.=.B 22.=.;B 22.=.;B perating perating Co!pany Co!pany eneral ,

eneral ,₂₂- concerns- concerns 1uip!ent spacing% 4enting and issues 1uip!ent spacing% 4enting and issues regardingpersonnel safety !ust be addressed throughout thepersonnel safety !ust be addressed throughout theregarding entire lease for the

entire lease for the entire operation.entire operation.

perating perating Co!pany Co!pany

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=of2 0B3;0320; DRAFT

Item

A p p l

i ! a &hreats/Conse'uen!es

H  % * P & Considerations

A!tions to $e taken / B, "ho and "hen Operational

Phase 1UBD/MPD/_Both

Hazard !enario

"hat I# 6 Criti!al Controls /_a#eguards Responsi$le_Part,

Primar, Categor,

;.'lanning ;= #$D + ; ; ell 'rogra!

;.'lanning ;B #$D + ; ; ell 'rogra!

;.'lanning ;< #$D + ; ; 22.=.;< ell'rogra!

;.'lanning ; #$D + ; ; RCD -uppli er Trai ni ng

;.'lanning ; $T, + ; ;

.

ell 'rogra!

;.'lanning ;5 $T, + ; ; ell 'rogra!

;.'lanning ;9 $T, + ; ; Choe3Flo"line

;.'lanning 20 $T, + ; ; 22.2.B.; Choe3Flo"line

;.'lanning 2; $T, + ; ; 22.=.;2 RigContractor &ud-yste!

;.'lanning 22 $T, + ; ; 22.;.=.; $'-yste!

Air Drilling 7 818 and #18 "ithin fla!!able li!its

Fla!!able !i:ture% potential for fire3e:plosion.

22.;.=. 22.=.;<

1li!inate one ele!ent of the reuire!ents for co!bustion (fuel% o:ygen% or ignition source). Consider inert gas operations.

/e4er flo" returns to a closed separator. Add inert gas to reduce fla!!ability.

perating Co!pany

Air Drilling 7 #ne:pected hydrocarbon zone encountered

'otential for do"nhole fire and3or ignition at surface.

22.;.=. 22.=.;<

#se inert gas if the ris of creating conditions suitable for co!bustion e:ists.

Consider inert gas operations.

perating Co!pany Air Drilling 7 &ud ring

occurs "ith co!bustible !i:ture in hole.

'otential for do"hnole ignition. 8oss of $,A% da!age to euip!ent% potential for in6ury3death% loss of "ell.

&onitor hole cleaning and fluid influ: carefully "hile drilling.

Consider inert gas operations.

perating Co!pany

Coiled Tubing 7 Coil pac7off fails

as3Fluid at rig floor (potential hydrocarbon release% ignition or fire). ,ar! to personnel.

For!ation da!age if "ell !ust be illed.

22.=.; 22;.=. R'2;

$egin operation "ith ne" stripper ele!ents. nspect sealing ele!ents after each trip. $ac up ele!ents a4ailable on location. &onitor for leaage during operation. Coiled Tubing 7 Coil

string failure (do"nhole "ashout)

'otential loss of "ell.

For!ation da!age if "ell has to be illed.

ncreased ris to personnel "hile tripping.

22.=.; R' 2;

Carefully define coil operating li!its. &onitor coil fatigue life. 'ressure test coil before 6ob.

#se appropriate corrosion inhibitor pacage. &ini!ize high pressure coil cycling.

Coil Tubing Contractor

Coiled Tubing 7 Coil string failure (surface "ashout)

as3fluid release at rig floor (potential hydrocarbon release3ignition3fire). ,ar! to personnel.

For!ation da!age if "ell !ust be illed.

1n4iron!ental da!age.

22.=.; R' 2;

Carefully define coil operating li!its. &onitor coil fatigue life. 'ressure test coil before 6ob.

#se appropriate corrosion inhibitor pacage. &ini!ize high pressure coil cycling. Run lea point bac into "ell if possible.

Coil Tubing Contractor

nadeuately 4ented *closed* at!ospheric tans.

'ressure build up in at!ospheric tans due to high liuid flo" rate or high solution gas content leading to possible tan rupture% personnel in6ury or en4iron!ental spill.

22.=.;< 22.;.=. R' 2;

1nsure installation design considers !a:i!u! input rates to closed at!ospheric tans and sufficiently sized 4ent lines are pro4ided.

#$D3&'D -er4ice 'ro4ider

Te!porary pipe and ha!!er union !is!atch

ith se4eral and di4erse co!panies on site the potential for !is!atched ha!!er union connections are greatly increased.

Threat of personnel in6ury and en4iron!ental spills.

1nsure clear policy and direction is pro4ided on acceptable te!porary pipe design and ha!!er unions. $an ha!!er unions "ith potential for !is!atch.

Failure to note losses% possibly leading to loss3ic situation

'ossible inadeuate returns !onitoring and3or flo" !odeling fails to recognize losses in zone of greater depletion3lo"er pore pressure than planned for.

'ossibility of "ell ic e:ceeding euip!ent rating% personnel in6ury% euip!ent da!age or loss of "ell.

1nsure adeuate !onitoring% early recognition of losses% "ell planned "ell control procedures.

,igh te!perature (i.e. ,',T "ells) e:ceeding $' seals te!perature rating

,',T "ells surface te!perature e:ceeding $'% etc. te!perature rating leading to pre!ature failure% loss of contain!ent% personnel in6ury% loss of "ell control.

For ,',T "ells consider use of additional te!perature !onitoring and 1-D procedures for Te!perature ,, conditions at $' stac.

#se proper sealing rubber for high te!perature.

perating Co!pany

(4)

Bof2 0B3;0320; DRAFT

A p p

l _H_*

A!tions to $e taken / B, "ho and "hen

Phase _Both "hat I# 6 _a#eguards _Part, Categor,

;. 'lanning 2= $T, 'orted floats are used + ; 2 22.2.= /RE-upplier /RE

;.'lanning 2B $T, + ; 2 22.2.= ell'rogra!

;. 'lanning 2< $T, + n6ury% loss of euip!ent. ; 2 22.;.=.

;. 'lanning 2 #$D + 'otential for in6ury. ; 2 22.=.= All /3A

;.'lanning 2 $T, + ; 2 22.=.=

;.'lanning 25 $T, + ; 2 22.=.=

;. 'lanning 29 $T, + 'otential for in6ury3death. ; 2 22.=.;= -eparation

;. 'lanning =0 $T, + 'otential for in6ury3death. ; 2 22.=.;= -eparation

;. 'lanning =; $T, + 'otential for in6ury3death. ; 2 -eparation

;.'lanning =2 $T, + ; 2 22.=.;= ell'rogra!

;.'lanning == $T, + ; 2 -eparation

;.'lanning =B $T, + ; = 22.=.=

;.'lanning =< $T, + ; = 22.=.;= ell'rogra!

;.'lanning = $T, + 2 ; /3A

'ressure co!!unicated to surface through drill pipe.

Cannot hold bac pressure on annulus as pressure is co!unicated to surface through drill pipe.

#se 2 non7ported float 4al4es.

Run /RE as contingency for drop7in chec 4al4e.

#nclear lines of authority

Ris to personnel% euip!ent% en4iron!ent.

All lines of authority to be clearly defined in progra!3pre7 spud. perating Co!pany nadeuate fire protection perating Co!pany 8ease Reuire!ents :ygen deficient en4iron!ents

dentify potentially o:ygen deficient areas and include in onsite orientation.

orers in high ris areas !ust "ear appropriate !onitoring de4ice.

Response to alar! condition is not clearly defined

Confusion on location increases ,-1 riss.

Clearly define response to alar! c onditions and co!!unicate the response to personnel on location.

perating Co!pany

8ease Reuire!ents &ultiple alar! syste!s

on location

Confusion on location increases ,-1 riss.

Clearly define response to alar! c onditions and co!!unicate the response to personnel on location.

perating Co!pany

8ease Reuire!ents ,2- 7 To:ic gas

released during cuttings separation process.

#se enclosed cutting separation process. Eacuu! degas fluid3solids strea! before cuttings separation.

&onitor3alar! any area "here there is a potential for a sour gas release.

,2- 7 To:ic gas

released fro! fluid storage syste!.

#se enclosed fluid separation process. Eent tans through scrubbers.

&onitor3alar! any area "here there is a potential for a sour gas release fro! the fluid storage syste!.

#$D3&'D -er4ice 'ro4ider ,₂- 7 To:ic gas release

"hen sa!pling cuttings

22.=.;= 22.;.=.2

'urge "ith non7to:ic or inert gas before opening sa!pler. #$D3&'D -er4ice 'ro4ider ,2- 7 !proper sour ser4ice !aterial selection

Rapid degradation of steel 7 not fit for ser4ice.

Full re4ie" of /AC1 &R 0;<3/AC1 ;<;< for ,2

-"ells.

Re4ie" R' ; Critical -our Drilling

perating Co!pany il $ased &ud 7

-olution gas release fro! drilling !ud

Ris of fire3e:plosion and personnel e:posed to har!ful 4apors.

22.=.;0 22.=.;B

Calculate 4olu!e of gas released fro! separator pressure to at!ospheric pressure.

8o" pressure separator reduces gas in solution. #se separate fluid storage syste! "ith totally enclosed and 4ented tans.

#$D3&'D -er4ice 'ro4ider &uster area is not

clearly defined.

ncreased ris for personnel to search location for !issing "orers.

Clearly define !uster area during "ellsite safety !eetings. perating Co!pany 8ease Reuire!ents ,₂- 7 1lasto!er failure3inco!patibility 8oss of $arrier. 'otential for in6ury3death.

Aniline testing elasto!ers.

'roper !aterial selection for elasto!ers.

perating Co!pany -hortage of

e:perienced people in planning stages

nability to identify all safety critical issues in the operation.

1nsure that personnel planning the operation are co!petent to do so.

perating Co!pany

(5)

<of2 0B3;0320; DRAFT

Item

A p p l

Hazard !enario

Primar, Categor,

;.'lanning = $T, + 2 ; Rig Contractor Drill -tring

;.'lanning =5 $T, + 2 ; Drill -tring

;. 'lanning =9 $T, oring on pad "ells + 2 ;

;.'lanning B0 $T, + 2 ; 22.=.2.2 All /3A

;. 'lanning B; $T, + 'otential for /RE to fail pre!aturely. 2 ; /RE -upplier /RE

;.'lanning B2 $T, + 2 ; nspect all rental euip!ent upon arri4al on location. All

;. 'lanning B= $T, ,igh Rate Flaring + 2 ; ell 'rogra!

;.'lanning BB $T, + 2 ; ell 'rogra!

;. 'lanning B< $T, + Ris of forest fire. 2 2 -eparation

Condition of drill pipe and elly (groo4es% e:ternal scale% etc.)

RCD leaage. n6ury to personnel. 're!ature RCD ele!ent "ear. Delay in drilling "ell (lost ti!e and cost).

#se dill pipe "ithout groo4es. #se pipe "ith no hardbanding. #se drillpipe "ith flush hardbanding.

-er4ice elly to eli!inate s harp edges and ensuring elly is as straight as possible.

RCD supplier pre76ob inspection.

Drill pipe3elly inspection. RCD supplier -'s3ris register.

Drill string diagra!.

Gelly sa4ers "ith rubber inserts are not reco!!ended as they can se4erely da!age the RCD ele!ent. A4oid abrupt D transitions bet"een Gelly and drill pipe.

$,A plan includes running spiral drill collars or other non7 strippable co!ponents.

RCD leaage. n6ury to personnel.

#nable to strip through RCD ele!ent. Delay in drilling "ell (lost ti!e and cost).

Re4ie" all drill sting co!ponents for strippability and sealability "ith the RCD.

-piral drill collars% 6ars% bu!per subs and stabilizers are not reco!!ended.

Function3stripping tests of odd7profile $,A co!ponents (on and3or offsite) is reco!!ended.

A4oid use of elly 4al4es "ith rubber casing sa4ers. Replace spiral DC "ith Rigid DC or ,D'.

perating Co!pany

-i!ultaneous operations on pad "ells increases ris of ,-1 incidents.

Deter!ine "hether other operations "ill occur on pad at the sa!e ti!e as the drilling operation.

1nsure that one site super4isor is appointed and that lines of authority are clear.

perating Co!pany

8ease Reuire!ents

Cre" shortage and3or ine:perience

,ar! to personnel. 8ost ti!e and cost.

nsite orientation and training.

-uper4isors to ensure that all personnel ha4e been trained in the 4arious co!ponents of the rig up operation.

dentify tass in tool bo: safety !eetings. 1nsure all "orers understand their right to refuse unsafe "or% or reuest training3guidance for tass that they are not yet co!petent in.

Consider 1&- onsite during rig up operations. Focus on shift change co!!unication infor!ation transfer.

Chec R' 22.=.2.2 perational Co!!unications /RE seal co!patibility

"ith fluid

Consider !ultiple /REs in $,A. Consider !etal3!etal seals.

Test seals "ith drilling fluid3reser4oir fluid prior to drilling operation.

Consider profile nipple do"n hole as a bacup. Rental euip!ent in

poor repair

1uip!ent failure during critical ti!es !ay ele4ate e:isting ,-1 riss.

perating Co!pany 1:ceed 4olu!e li!its% -hut in "ell%

cease operations.

,igh ' "ell probability% build so!e HfatH into !odeling% calculations and per!it applications.

A1R Directi4e 0> #pstrea! 'etroleu! ndustry Flaring% ncinerating% and Eenting (see """.aer.ca)

perating Co!pany

,igh ,₂- Flaring 1:ceed allo"able li!its for -2 7;2ppb34olu!e. -hut in "ell% cease operations.

as Chro!atograph to ualify !odeling. Continuous ,2- content !onitoring in fluid strea!.

perating Co!pany

nadeuate lease spacing for flare.

Consult appropriate forestry regulations. 1nsure reuired fire !itigation is in place (sprinler syste!% "ater storage% etc.)

perating Co!pany

(6)

of2 0B3;0320; DRAFT

A p p

l _H_*

;. 'lanning B $T, nadeuate lighting. + 2 2

;.'lanning B $T, + 2 2 -eparation

;.'lanning B5 $T, + 2 2 All

;. 'lanning B9 $T, 1:posure to "ildlife + Ris to personnel or "ildlife. 2 2

;.'lanning <0 $T, + 2 2 All 8ease &anage!ent

;.'lanning <; $T, + ; 2 22.;.<.< -eparation

;.'lanning <2 $T, + ; 2 22.;.<.< -eparation

;. 'lanning <= #$D + /o burn 7 cold 4ent. 2 2 ell 'rogra!

;.'lanning <B $T, + 2 2 -eparation

;.'lanning << #$D + 2 2 R'2; ell'rogra!

;.'lanning < $T, + 2 = /RE -upplier /RE

;. 'lanning < $T, + Ris to en4iron!ent3personnel. 2 = -eparation

ncreased potential for ,-1 incidents such as slips% trips or falls.

Conduct re4ie" of lighting reuire!ents "ith ser4ice co!panies at pre7spud.

Consider constructing a lighting diagra!. Rent light to"ers as reuired.

perating Co!pany 8ease Reuire!ents 1uip!ent not flushed3cleaned pre3post 6ob

Conta!ination of fluids on location "ith prior 6ob "aste.

nspect euip!ent upon arri4al and before being released.

perating Co!pany #nclear responsibility

for rental euip!ent

'otential euip!ent failure if not used properly.

Deter!ine responsibility during pre7spud and confir! in onsite safety !eetings.

perating Co!pany Co!!unicate riss of bears% etc. during safety !eeting.

1stablish protocol for personnel lea4ing location on foot.

perating Co!pany 8ease Reuire!ents 1uip!ent3'ersonnel Congestion

/oise% pressure% 4ibration% egress% co!!unication 7

&isco!!unication'otential for in6ury3death.

For!al Chain of co!!and. For!al locout3tagout3control of "or. For!al 'T38ogistics 'lan.

Re4ie" R'  -tandards for ellsite -uper4ision of Drilling% Co!pletions and oro4ers.

-eparator liuid carry7 o4er into flare line and3or shipping pu!p failure

-pill 7 en4iron!ental da!age Fire% e:plosion fro! flare stac% personnel e:posure -eperator o4er7pressure

Cold 4enting (regulatory e:e!ption !ay be reuired). Auto!atic liuid high le4el shut7do"n in separator.

Flare stac spacing% height and ground clearance fro! co!bustable !aterials.

'rocedures and euip!ent in place for !anaging separator le4el if le4el no high le4el shut7do"n. Audible and 4isual alar!.

1nsure adeuate redundancy of pressure shipping and pu!p shipping capacity.

-eparator gas carry7 under do"n the liuid shipping lines

as at rig tans.

Fire% e:plosion% personnel e:posure.

Auto!atic liuid lo" le4el shut7do"n in separator. 'rocedures and euip!ent in place for !anaging separator le4el if le4el no lo" le4el shut7do"n. Audible and 4isual alar!.

8183#18 gas !onitoring and alar!ing at the shaer 8iuid shipping to a re!ote tan syste!.

Trying to flare "ith high C2 !olI

#se of supple!entary fuel gas ('ropane).

perating Co!pany il $ased &ud 7

ncreased solubility in oil based !ud (R 4ariability)

'oor ,2- -tripping 3 -eparation.

'otential for in6ury3death.

#$D3&'D -er4ice 'ro4ider Coiled Tubing 7 -lips fail

to hold $,A co!ponents

Tools dropped in hole% resulting in lost ti!e% high7ris fishing operation. 'otential gas3fluid release at rig floor.

&anage ris "ith appropriate procedures and checs to !ae sure slips are engaged and holding. Consult R'2; Coiled Tubing perations

Coil Tubing Contractor Drill string /REs

!issing or "rong size3thread

/o drill string "ell control. Delay in drilling "ell (lost ti!e and cost).

Drill string da!age.

ait on correct /REs3subs.

/RE supplier standard operating procedures3ris register.

Drill string diagra!. Flare gun ignites forest

or grassland

Consider using an auto7ignition syste! if flaring in an area or ti!e of year "hen there is a high ris of fire.

(7)

of2 0B3;0320; DRAFT

Item

A p p l

Hazard !enario

Primar, Categor,

;.'lanning <5 $T, + = ; RCD -upplier RCD

;.'lanning <9 $T, + = ; /3A

;.'lanning 0 #$D + = ; ell 'rogra!

;.'lanning ; $T, + = 2 Drill -tring

;.'lanning 2 $T, + = 2 'D&

;.'lanning = $T, + = 2 'D&

;. 'lanning B $T, + Release of to:ic gas near separator = 2 For!al Co!!unication !ethod 7 radios 8ease &anage!ent

;.'lanning < $T, + = 2 -eparation

;.'lanning  $T, + = 2 ell 'rogra!

;.'lanning  $T, + = = 8ease &anage!ent

;. 'lanning 5 $T, Flush 8iuid 'roduction + = ell 'rogra!

;.'lanning 220 #$D + ; ; ell Control

RCD doesnt fit under sub

Atte!pts to try and fit RCD could cause in6ury to personnel. Can not drill #$D3&'D. Delay in drilling "ell (lost ti!e and cost).

Raise rig sub height by building up lease around casing bo"l.

Eerify and chec eualizing line clearance if built too high.

Change $' euip!ent. #se different rig. #se different RCD. Add pony sub under rig.

RCD supplier to go to location to chec out rigHs sub prior to 6ob.

Accurate $' stac7up and rig substructure clearance !easure!ents

1uip!ent a4ailable3Ti!ing

Delay in drilling "ell (lost ti!e and cost)

1nsure adeuate co!!unications bet"een supplier and operator.

Confir! ti!ing at pre7spud.

perating Co!pany Air Drilling 7 ater influ:

is encountered

,ole cleaning proble!s% delay in operation.

perational plan should include contingency for s"itching to !ist% foa! and !ud operations.

perating Co!pany Drill pipe and3or tool

6oint size different than planned

're!ature RCD ele!ent "ear. rong size RCD stripper ele!ents on location.

Delay in drilling "ell (lost ti!e and cost).

RCD fails to pressure test.

Drill string inspection. Eerify drill string size.

RCD supplier -'s3ris register. Drill string diagra!.

perating Co!pany

!properly specified 'D&s

Freuent !otor failures or poor perfor!ance increases nu!ber of trips reuired along "ith the associated riss.

ait on 'D&s suitable f or #$D3&'D en4iron!ent K te!perature and fluid co!patibility.

1nsure 'D& supplier is a"are of do"nhole operating en4iron!ent for application.

nspect data for 'D&s recei4ed 4s. order placed.

Directional Co!pany

Du!p subs in !otors are not blaned off

ait on blaned du!p subs and3or trip out of hole.

&otor supplier should be in4ol4ed in planning stage to ensure that the proper !otor specification is being supplied.

Directional Co!pany -olids 7 Eac truc

handling

perating Co!pany -olids 7 re7in6ection

do"n drill string

'lugged $,A Drill string "ashouts.

-uction side discipline -uction -creens

#$D3&'D -er4ice 'ro4ider Re7entry 7 Casing e:it

debris in "ell

,igher and3or unstable $,'. Tight hole or stuc pipe. 'lugged choe3separator du!p 4al4es.

Da!age to bit and3or $,A.

Consider !agnet36un baset run to clean out casing e:it.

&onitor torue3drag carefully throughout drilling and tripping through e:it.

perating Co!pany

-olids 7 "aste !anage!ent

1n4iron!entally responsible disposal of ,₂- conta!inated cuttings

A1R Directi4e <0> Drilling aste &anage!ent (see """.aer.ca)

perating Co!pany "aste !anage!ent policies

perating Co!pany 1:ceed separator throughput

capacity.

Release of burning oil3condensate fro! flare tip.

,igh ' "ell probability% build so!e HfatH into !odeling% calculations% and per!it applications.

perating Co!pany Aspiration of ₂ fro!

a!bient air into the drillpipe or "ell

1:plosi4e !i:tures. Fire and e:plosion. Da!age to do"nhole euip!ent and3or "ell casing.

R' ;5 22.;.<.<

1nsure "ell is ne4er placed on 4acuu!. Al"ays fill drill string "ith liuid or inert gas during

tripping.

Al"ays !aintain !onitorable positi4e pressure on "ellbore.

Conslut R';5 Fire and 1:plosion ,azard &anage!ent

#$D -er4ice 'ro4ider

(8)

5of2 0B3;0320; DRAFT

A p p

l _H_*

9 $T, + ; ; 22.=.2.2 8ease&anage!ent

0 $T, 8ifting hazards + ; ; 22.=.< 8ease&anage!ent

; $T, + ; ; RCD

2 $T, + ; ; 8ease &anage!ent

= $T, + ; ; All All

B $T, + ; ; !ple!ent electrical locout3tagout procedures. All All

< $T, + ; ; All All

 $T, + ncreased ris to personnel. ; 2 -eparation

 $T, + 8ost ti!e and cost. 2 ; RCD -upplier RCD

5 $T, + 8ost ti!e and cost. 2 ; Rig Contractor $' -yste!

9 $T, + 8ost ti!e and cost. 2 ; Choe3Flo"line

2. Rig #p 3 'ressure Test 3 Co!!issioning

8oss of radio co!!unication

,ar! to personnel due to erroneous co!!unications.

8ost ti!e and cost.

1nsure hand signals are in place for i!portant co!!unications.

1stablish radio protocol in safety !eeting. -upply sufficient head sets for !en "oring in high7 noise en4iron!ents.

1stablish battery changing schedule.

perating Co!pany 3 #$D3&'D -er4ice 'ro4ider 2. Rig #p 3 'ressure Test 3 Co!!issioning

,ar! to personnel and3 or da!age to euip!ent.

8ost ti!e and cost.

Co!pany !an to coordinate hoisting acti4ities "ith picer operator and super4isors.

're7fab $' co!ponents can be difficult to install in lo" clearance areas.

-afety hand to be i n4ol4ed during rig up. -potting #'D3&'D euip!ent.

'icer perator 3 #$D3&'D -er4ice 'ro4ider 2. Rig #p 3 'ressure Test 3 Co!!issioning nadeuate or non7 e:istent "or platfor!s3barriers (i.e. RCD "or platfor!)

Trip and fall hazards particularly around RCD installation3re!o4al and seal ele!ent change out.

nstall suitable "or decs and barriers for any ele4ated "or tass% particularly RCD installations.

Adeuate co!!unication perating Co!pany 3 #$D3&'D -er4ice 'ro4ider 2. Rig #p 3 'ressure Test 3 Co!!issioning A!bient te!peratures belo" freezing

'ossible freezing in piping dead legs% liuid traps% etc. "ith resultant blocage.

Consider heat tracing and3or "ar! air3/2 circulation to

!aintain clear lines.

A4oid liuid traps in installation% utilize *clear line* start up procedure. perating Co!pany 3 #$D3&'D -er4ice 'ro4ider 2. Rig #p 3 'ressure Test 3 Co!!issioning nadeuate or non7 e:istent electrical grounding of euip!ent sids !properly or non7grounded euip!ent sids leading to personnel in6ury and euip!ent do"nti!e.

!ple!ent an electrical grounding plan for the installation.

nspect and test installation for electrical grounding. 2. Rig #p 3 'ressure Test 3 Co!!issioning nadeuate or non7 e:istent electrical locout3tagout procedures.

'ersonnel in6ury% euip!ent da!age "hen pre!aturely po"ering up electrical circuits. 2. Rig #p 3 'ressure Test 3 Co!!issioning nadeuate or non7 e:istent locout3tagout procedures for utility supply (i.e. instru!ent air)

'ersonnel in6ury% euip!ent failure% en4iron!ental spills as a conseuence of inad4ertent re!o4al of sidded euip!ent utility supply (i.e. instru!ent air).

!ple!ent locout3tagout procedures for te!porary sidded euip!ent utility supply.

2. Rig #p 3 'ressure Test 3 Co!!issioning /o high7pressure "arning signs on pipe"or

Re4ie" in safety !eetings. nspect prior to pressure testing. nspect te!porary pipe "or.

#$D3&'D -er4ice 'ro4ider 2. Rig #p 3 'ressure Test 3 Co!!issioning RCD fails to pressure test

1nsure adeuate spares on location.

Eisually chec rig annular (ring gasets3stud threads) prior to rig up.

1nsure proper rig align!ent. 2. Rig #p 3

'ressure Test 3 Co!!issioning

$' ele!ents fail to pressure test

$' should be tested and ser4iced as per A1R Directi4es prior to 6ob.

Rig should stoc spare co!ponents as appropriate. 2. Rig #p 3

'ri!ary flo" line fro! stac to separation euip!ent fails to pressure test

-er4ice co!pany !ust be able to de!onstrate &TR% certification for pipe"or.

-upplier to pro4ide -' for rig up and pressure test. Rig !atting to be s upplied in !uddy3soft ground conditions to enable proper !aeup3align!ent of pipe"or.

(9)

9of2 0B3;0320; DRAFT

Item

A p p l

Hazard !enario

Primar, Categor,

50 $T, + 2 ; All 8ease &anage!ent

5; $T, + 2 ; ell 'rogra!

52 #$D + 2 ; Co!pression

5= $T, + 2 ; ell 'rogra!

5B $T, 'oor "eather + 2 2 8ease &anage!ent

225 $T, Fueling 1uip!ent + ,ar! to personnel and euip!ent. 2 2 All

5< $T, 'oor ground conditions + 2 2 8ease &anage!ent

5 #$D + 8ost ti!e and cost. = ; Co!pression

5 $T, + = ; /RE -upplier /RE

55 $T, + = ; Co!pression

Cre" shortage and3or ine:perience

,ar! to personnel. 8ost ti!e and cost.

nsite orientation and training.

-uper4isors to ensure that all personnel ha4e been trained in the 4arious co!ponents of the rig up operation.

dentify tass in tool bo: safety !eetings. 1nsure all "orers understand their right to refuse unsafe "or% or reuest training3guidance for tass that they are not yet co!petent in.

Consider 1&- onsite during rig up operations. dentify ine:perienced cre"3short ter! cre" "ith green hand or green hard hats.

ell para!eters different fro! progra! 7 'R1--#R1

-urface euip!ent !ay not be suitable in ter!s of pressure rating3flo" rate capability 7 "ait on euip!ent.

Fluid syste! !ay not be capable of achie4ing reuired pressure profile.

ffsets to be analyzed as a guide for planning the operation.

Assu!e "orst7case scenario "hen planning the "ell. Consider flush7production scenario encountered in #$D operations. perating Co!pany 3 #$D3&'D -er4ice 'ro4ider 2. Rig #p 3 'ressure Test 3 Co!!issioning

Failure to install chec 4al4e on each in6ection line

'ossibly pressurize !ud pu!p syste! through nitrogen in6ection line (suction line !ay fail).

as loc !ud pu!p.

Discuss reuire!ents in pre7spud.

Chec 4al4e to be installed do"nstrea! of all pu!ping euip!ent in operations using a ser4ice gas.

perating Co!pany 3 #$D -er4ice 'ro4ider 2. Rig #p 3 'ressure Test 3 Co!!issioning ell para!eters different fro! progra! 7 ,₂

--urface euip!ent !ay not be suitable for handling sour fluid. Additional concerns "ith regards to

,-1 for safe operations% fluid transportation% etc.

ffsets to be analyzed as a guide for planning the operation.

Assu!e "orst7case scenario "hen planning the "ell. 'lan for sour operations if there is e4en a s!all potential of encountering sour gas.

perating Co!pany 2. Rig #p 3 'ressure Test 3 Co!!issioning ,ar! to personnel. 8ost ti!e and cost.

-uper4isors ha4e obligation to stop unsafe "or3acti4ities. perating Co!pany 2. Rig #p 3 'ressure Test 3 Co!!issioning

1nsuring adeuate fuel gage and grounding. Re4ie" -'s. Rig Contractor 3 #$D3&'D -er4ice 'ro4ider 2. Rig #p 3 'ressure Test 3 Co!!issioning

ce% !ud% une4en terrain can increase potential for slips% trips and falls.

Consider e:tensi4e use of rig !atting. -a"dust% etc. to be a4ailable to i!pro4e footing on sno"3ice in "inter operations.

perating Co!pany 2. Rig #p 3 'ressure Test 3 Co!!issioning Co!pression or /2 unit fails to start

Co!!ission in yard test if unit has been idle for a significant length of ti!e.

-er4ice co!pany to sho" !aintenance records. nspect fuel tans before filling "ith diesel onsite.

Co!pression -upplier

/REs fail to pressure test or no docu!entation of pressure test

Failure to pressure test increases lielihood of a leaing /RE occurring.

'aper"or "ith /REs to include docu!entation of shop pressure test.

Consider onsite pressure testing apparatus. ,a4e contingency procedures. ,a4e spare(s) /RE a4ailable. 2. Rig #p 3

'oor uality diesel fuel on location

1uip!ent da!age% and lost ti!e. 'u!p3co!pressor failure during #$D3&'D operations !ay result in "ell control issues.

Adeuate fuel filtering syste! to be in place for all critical co!ponents.

nspect rental fuel storage tans before fi lling (especially B00 bbl tans not nor!ally used for fuel storage).

perating Co!pany 3 #$D3&'D -er4ice 'ro4ider

(10)

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59 $T, + ; ; 22.;.< Training 90 $T, + ; ; Choe3Flo"line 9; $T, + ; ; 22.;.=. Flare3Eent-yste! 92 $T, + ; 2 22.=.2.2 8ease&anage!ent 9= $T, + 2 2 &ud -yste! 9B #$D + 2 2 ell 'rogra! 9< $T, + 2 2 Data Acuisition 9 $T, + 2 2 ell 'rogra! 9 $T, + = 2 Drill -tring

22B &'D n Casing Test + Da!age to euip!ent. = = ell 'rogra!

95 $T, + = 2 &D

=. Drill ut and ,ole Conditioning

Rig cre"s unfa!iliar "ith process

,ar! to personnel% euip!ent or en4iron!ent.

8ost ti!e and cost.

Detailed #$D3&'D progra! in place.

ritten procedures for critical operations a4ailable on rig floor.

Re4ie" procedures "ith all personnel in a safety !eeting before drillout.

Consider dry run for critical procedures prior to drilling out.

perating Co!pany 3 #$D3&'D -er4ice 'ro4ider

=. Drill ut and ,ole Conditioning Eal4es incorrectly positioned on stac or !anifold 'ossible o4erpressure of RCD or !anifold at surface. 'ossible fluid release to at!osphere3en4iron!ent.

22.;.< 22.=.B

'rocess flo" diagra! posted in dog house. al the pu!p lines before co!!encing drillout procedure.

Consider labeling all 4al4es and !aring the! as nor!ally open or nor!ally closed.

All "ell control piping to be blo"n dry and3or heated to pre4ent freezing.

-eparator not purged prior to lighting flare

'otential bacflash3e:plosion in separation euip!ent.

'urge "ith nitrogen prior to lighting flare.

1nsure bacpressure syste! is operable on pressurized separator before lighting flare.

'oor co!!unications during "ell conditioning

4erpressure at surface% dead7 heading pu!ps and other ,-1 concerns.

1nsure hand signals are in place for i!portant co!!unications.

1stablish radio protocol in safety !eeting. -upply sufficient head sets for !en "oring in high7 noise en4iron!ents.

Re4ie" roles in safety !eeting.

perating Co!pany

Che!ical in6ection pu!ps are not "oring or not calibrated.

Riss of carryo4er fro! separator (en4iron!ental concern). Corrosion concerns.

Test in6ection pu!ps during rig up and co!!issioning. -tore che!icals as per !anufacturers

reco!!endations.

Consider connecting in6ection pu!ps to data syste!.

'oorly designed hole conditioning procedure

1:cessi4e slugging and3or surface pressure and flo" rates. 'ossible fluid carryo4er.

Detailed #$D progra! in place% including pu!p schedule.

ritten procedure in doghouse3#$D control unit. 'rocedure re4ie"ed by engineering and discussed in safety !eeting.

perating Co!pany

Data syste! not functioning properly

nability to react in real7ti!e to "ell conditioning e4ents.

'ossible errors in i! ple!enting hole conditioning pu!p schedule.

Test sensors and data syste! during c o!!issioning phase and confir! operation prior to drillout. 1nsure sensors are heat traced so that they donHt freeze and pro4ide erroneous data.

#$D3&'D -er4ice 'ro4ider =. Drill ut and

,ole Conditioning

For!ation integrity test insufficient for planned operations

#nable to apply #$D3 &'D progra!. 'ossible "ell control concerns% lost ti!e or har! to personnel.

&ay reuire additional casing string or redesign of &'D3#$D operation.

Re!edial ce!ent 6ob3re7drill and test.

perating Co!pany

Float shoe debris in "ell after drillout

,igher $,' than predicted. #nstable $,'. -tuc pipe. 'lugged choe. Da!age to $,A3bit.

Drill out "hile pu!ping at high rate. Consider tooth bit 4ersus 'DC. &onitor torue and drag "hile drilling shoe. bser4e returns at s haer.

Direct returns to shaer% bypassing separator. Control drill through plug.

Consider drilling out "ith slic asse!bly.

perating Co!pany

$it to casing c learance. Follo" detailed -'s. 1nsure ho!ogeneous !ud in hole.

&'D -er4ice 'ro4ider

Da!age to $,A during drillout

'otential har! to personnel if $,A floats fail.

8ost ti!e and cost due to round trip. Co!pro!ised $,A integrity !ay result in a "ell control scenario.

Displace to gasified3drilling fluid syste! in controlled !anner after drillout.

1nsure all in6ection rate !eters are functioning and the reuired rate is being pu!ped.

bser4e pressures during hole conditioning.

Directional Co!pany

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Item

A p p l

Hazard !enario

Primar, Categor,

99 #$D + = 2 /RE

B.Drilling ;00 $T, + ; ; 22.=.9 Add c onti ngency plans.  ell 'rogra!

B.Drilling ;0; $T, + ; ; 22.=.9 Add c onti ngency plans.  ell 'rogra!

B. Drilling ;02 $T, -eparator fails + ; ; -eparation

B.Drilling ;0= $T, + ; ; -eparation

B.Drilling ;0B $T, + ; ; 22.=.9 ell'rogra!

B.Drilling ;0< $T, + ; ; -eparation

/RE not installed near surface prior to conditioning "ith co!pressible fluid

1:cessi4e bleed7off ti!e3connection ti!e.

'ossibly reuire re7conditioning hole after long bleed7off ti!e to install /RE.

Reference and re4ie" drill string diagra!. Discuss in safety !eeting and confir! installation 4isually before co!!encing operations. Add drill string floats.

perating Co!pany 3 #$D -er4ice 'ro4ider

/o strategy for *planned* shut do"ns

Failure to consider t he shutdo"n seuence !ay result in hole proble!s% high pressures at surface% unnecessary "ell ill% etc.

perating Co!pany 3 #$D3&'D -er4ice 'ro4ider /o strategy for

*unplanned* shut do"ns

Failure to consider t he shutdo"n seuence !ay result in hole proble!s% high pressures at surface% unnecessary "ell ill% etc.

perating Co!pany 3 #$D3&'D -er4ice 'ro4ider as release and har! to

personnel3en4iron!ent.

22.;.=.< 22.2.B.<

-eparation euip!ent certification !ust be current. '-Es installed and relief lines rigged up.

RigHs "ell control euip!ent rigged in and operational in case of catastrophic failure.

Dead legs3liuid traps on per!anently piped sid euip!ent 7 increased incidence of internal corrosion% lea and3or rupture

-idded euip!ent "ith per!anent piping installations often incorporate pipe dead legs or liuid traps (i.e. concentric reducers instead of eccentric reducers) "here acidic or corrosi4e liuids accu!ulate and are not easily flushed.

'ossible lea or rupture "ith resultant personnel% euip!ent and en4iron!ental conseuences.

Consider inspection of sidded euip!ent per!anent piping for dead legs and liuid traps and re!o4e or pro4ide !eans of inspection and docu!entation.

ashout occurs on pri!ary flo"line fro! $' stac to the separation euip!ent

as release on location. 'ersonnel in6ury. Da!age to euip!ent.

Consider onsite #ltrasonic Thicness (#T) !onitoring progra!.

&a:i!ize separator pressure to !ini!ize 4elocity in fl o" line.

-er4ice co!pany to pro4ide erosion !anage!ent docu!ent.

perate "ithin Flo" Control &atri: para!eters. Train on critical operations such as shutting in or di4erting to secondary flo" line.

&aintain flo" 4elocities in pri!ary flo"line belo" (<< !3sec) in absence of detailed erosion !odeling. Reduce nu!ber of flo"line turns.

1nsure ;0 internal dia!eters spacing bet"een flo"line turns. This allo"s the flo" to straighten prior to the ne:t turn.

'ri!ary flo"line !ust contain targeted tees (turns) and be a !ini!u! ;0;. !! in outside dia!eter or larger. &a:i!ize liuid in6ection rate.

'ipe "all thicness erosion

4er ti!e pipe "all erodes or corrodes leading to reduction in pressure integrity% possible lea or rupture "ith resultant personnel% euip!ent and en4iron!ental conseuences.

22.2.2.B 22.2.2.;

!ple!ent pipe inspection procedures and docu!entation prior to each rig up% and /DT "all thicness inspections at 4ulnerable points throughout operation.

#T testing "hen possible.

(12)

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B.Drilling ;0 $T, + ; ; RCD -upplier RCD

B. Drilling 22< &'D + ,ar! to en4iron!ent. 2 2 -eparation

B.Drilling 22 &'D + ; ; ell 'rogra!

B.Drilling 22 $T, + ; ; All RCD

B.Drilling ;0 $T, + ; ; RCD -upplier RCD

B.Drilling ;05 $T, + ; ; RCD -upplier RCD

B.Drilling ;09 $T, + ; ; Rig Contractor ell 'rogra!

B. Drilling ;;0 #$D Gelly hose failure + ; ; Rig Contractor Rig 1uip!ent

RCD drill string sealing ele!ent failure or RCD Control #nit Failure

as3,ydrocarbon fluid release at rig floor.

gnition and e:plosion ris. 'ossible for!ation da!age if "ell has to be illed.

22.2.2.= 22.2..= 22.=.

Chec rig align!ent before and during operation. &onitor RCD perfor!ance "hile drilling.

Replace ele!ents as per supplierHs -'s before !a6or leaage occurs.

,a4e a bacup ele!ent ready for uic installation. Consider installing a ne" ele!ent during lo" ris t i!es (out of hole% prior to starting drilling after a trip% etc.). Co!plete regular inspection of the control unit and its operability.

ndication of failure is to be considered a "ell control e4ent.

Consider a redundant bac7up unit onsite. Degasser

fails3o4erflo"s

1nsure degasser fluid le4el3capacity. perate "ithin "ell progra! specifications. perate "ithin euip!ent specifications.

#se of secondary flo" line (rig bleed7off line)

8oss of "ell control.

,ar! to euip!ent and personnel.

perate "ithin "ell scope.

1nsure adeuate drilling fluid "eight and surface bac pressure (-$').

1nsure adeuate ill !ud on location.

nadeuate3i!proper RCD size

,ar! to personnel or en4iron!ent. Da!age to euip!ent. 'ossible loss of "ell control.

Re4ie" offset data for area. Follo" driling progra!.

'lan for !a:i!u! pressures e:pected. 1nsure contingency plans are in place. /o procedures in place

for replacing RCD ele!ent

!properly atte!pting to change the RCD ele!ent !ay result in fires% e:plosions or other catastrophic ,-1 e4ents.

,ar! to personnel.

22.2.2.= 22.=.

Reference supplierHs -'s for changing the RCD ele!ent.

Rehearse eualizing procedure prior to conducting operations.

$ac pressure reuired during process. RCD ele!ent

deteriorates

Choe plugging% euip!ent da!age. Co!pro!ise of "ell control barrier.

22.2.2.= 22.=.

Reference supplierHs -'s for the use and !aintenance of the RCD.

,a4e bearing3rubbers a4ailable.

Drill string failure ("ashout or t"ist7off)

'ossible gas3hydrocarbon fluid at rig floor.

gnition and e:plosion ris. For!ation da!age due to "ell ill. 'ossible pipe light situation.

22.=.9 22.=.;;

1stablish !a:i!u! torue li!it on pipe during drilling operations.

nspect all drill string co!ponents according to the appropriate ris assessed A' or D-7; category. &onitor drilling data for signs of pipe "ashout. nclude drill string failure in planned3unplanned shut7 do"n procedures.

as3fluid release at rig fl oor. ,ar! to personnel. gnition and e:plosion riss. For!ation da!age if "ell has to be illed.

22.2..B 22.=.9

Consider installing ne" elly hose prior to c o!!encing #$D operations.

Gelly hose to be certified for hydrocarbon liuid ser4ice "hen using $&.

Run surface drill pipe screens periodically and chec for rubber debris.

'ressure test elly hose prior to starting operations. Consider using a hose certified for gas ser4ice in high ris operations (natural gas in6ection% etc.). Gelly hose issues also apply to other fle:ible rubber co!ponents in the rigHs !ud circulation syste!.

(13)

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Item

A p p l

Hazard !enario

Primar, Categor,

B.Drilling ;;; $T, + ; ; 22.2.2.; RigContractor Rig1uip!ent

B.Drilling ;;2 $T, + ; ; ell Control

B.Drilling ;;= $T, + ; ; 22.;.< ellControl

B. Drilling ;;B $T, $,A /RE failure + ; ; /RE

B.Drilling ;;< $T, + 2 ; &D

B.Drilling ;; $T, + 2 2 ell Control

B.Drilling ;; $T, + ; ; /RE B.Drilling ;;5 $T, + ; ; 22.2.=.; /RE B.Drilling ;;9 $T, + ; ; 22.2.=.; /RE Circulating through fle:ible hoses3shoc hose

Failure of hoses results in release of hydrocarbons% potential in6ury to personnel.

,oses to be certified for hydrocarbon liuid ser4ice "hen using $&.

'ressure test hoses prior to starting operations. #se a hose certified for gas ser4ice in high ris operations (natural gas in6ection% etc.). #se hard line "hene4er possible. ell has to be illed for

"ell control

For!ation da!age. gnition and e:plosion riss. 'otential har! to personnel.

22.;.=.2 22.;.=.<

Gill fluid !ust be a4ailable on site% as per regulatory reuire!ents.

Flo" control !atri: in place% and obser4ed. ell control procedure in place and rehearsed.

perating Co!pany 'oor understanding of

the relationship of the #$D3&'D it and the rig it "ith regards to "ell control e4ents

Failure in "ell control procedure !ay result in "ell control proble!s% loss of control% in6ury or death.

n7site orientation and training is to include "ell control considerations.

Discuss at pre76ob safety !eeting.

RCD -upplier 3 #$D3&'D -er4ice 'ro4ider

'ossible gas3reser4oir fluid co!!unication to surface. &ay reuire "ell ill to trip safely. #nable to trip "ith re!edying the situation ("ell ill% set a plug% or retrie4e3replace /RE).

22.2.=.; 22.=.;0

Test /REs before initial installation. Replace $,A /REs after e4ery trip.

nclude contingency to set a plug or another retrie4able /RE as deep as possible.

nstall screens abo4e /RE to catch debris fro! the drill string.

Run a !ini!u! of t"o /REs in the $,A.

perating Co!pany

'D Failure3&D Annular 'ressure fails

perational para!eters often consider a4ailability of real ti!e 'D data.

Absence of 'D data !ay result in poor decision !aing regarding "ell control.

'ossible trip out of the hole (cost). #ncertainty regarding do"n hole pressure.

Re4ie" reuire!ents for ' D data and i!portance "ith directional co!pany prior to starting operations. nclude decision points in progra! regarding 'D data failure.

&aintain a "ell calibrated t"o phase flo" ! odel throughout operation.

#se pressure data obtained fro! &'D soft"are. !ple!ent pu!ping progra! in accordance "ith &D tool -'s to !ini!ize potential for tool failure. #$D progra! should include potential decision points to trip% including "hether the operation can safely proceed "ithout 'D data. &D Contractor 3 #$D3&'D -er4ice 'ro4ider naccurate flo" si!ulation

'otential to operate outside of fl o" control !atri: due to "rong input data.

Re4ie" fluid data and si!ulation soft"are use "ith #$D ser4ice pro4ider.

#$D3&'D -er4ice 'ro4ider Rig cre" una"are of

dangers of trapped pressure belo" /RE

'ossible da!age to euip!ent% in6ury% or loss of life i f /RE is broen out "ith trapped pressure belo" it.

22.2.=.; 22.;.<.;

!proper use of /REs are a leading cause of ,-1 incidents in #$D3&'D operations.

Re4ie" supplierHs -'s and i!ple!ent their use in accordance "ith the R' referenced.

perating Co!pany 3 &'D -er4ice 'ro4ider /o "ritten procedures

in place for bleeding off the /RE

'ossible da!age to euip!ent% in6ury% or loss of life i f /RE is broen out "ith trapped pressure belo" it.

perating Co!pany 3 &'D -er4ice 'ro4ider nadeuate pressure

rating for /RE bleed7off hose and tool

'ossible in6ury or loss of life if hose or tool fails.

perating Co!pany 3 /RE 'ro4ider

(14)

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B.Drilling ;20 $T, + ; ; 22.2.=.; /RE

B.Drilling ;2; $T, + ; ; 22.2.=.; /RE

B.Drilling ;22 $T, + ; ; 22.2.=.; /RE-upplier /RE

B.Drilling ;2= $T, + ; ; 22.=.;2 Choe3Flo"line

B.Drilling ;2B #$D + ; ; ell 'rogra!

B.Drilling ;2< $T, + ; ; Data Acuisition

B.Drilling ;2 #$D + ; ; ell Control

B.Drilling ;2 #$D + ; ; ell Control

B. Drilling ;25 $T, + 8oss of "ell control. ; ; 22.2.< ellControl

B.Drilling ;29 $T, + ; ; 22.2.2.; ellControl

B.Drilling ;=0 #$D + ; ; 22.;.=.2 RCD-upplier RCD

B.Drilling ;=; &'D + ; ; 22.=.;2 Choe3Flo"line

/RE bleed7off hose in poor condition

'ossible in6ury or loss of life if hose fails.

perating Co!pany

/RE bleed7off hose is not securely anchored

,ose !ay "hip and in6ure3ill personnel on the rig floor.

perating Co!pany

Retrie4able /RE unseats under pressure

#nseated /RE can cause serious da!age to euip!ent or in6ury3death.

Do not allo" unualified personnel to seat% inspect% or touch retrie4able /REs.

ell is accidentally shut in "hile pu!ping single phase (liuid)

'ossible for!ation breado"n at "ea point.

ell control proble!s3blo"out.

Job planning !ust include !a:i!u! allo"able surface pressure for the !ud "eight used for the operation. perational ad6ust!ents !ust be !ade based on the for!ation integrity test3leaoff gradient.

Consider installing a pressure relief 4al4e upstrea! of the choe.

Air introduced into circulating syste! "hile !aing drill pipe connection3tripping

'otential for e:plosi4e !i:tures and3or fire (surface or do"nhole).

22.;.=. R' ;5

Job planning stage is to consider the air 4olu!e reuired to create a co!bustible3reacti4e !i:ture do"nhole based on the drilling fluids being used% reser4oir fluids% etc.

perating Co!pany

nsufficient pressure !easure!ent points

4erpressure of euip!ent% error in "ell control operations !ay result in euip!ent da!age or in6ury to personnel.

22.;.=.2 22.2.2.;

'LD to include electronic and !anual pressure !easure!ent points.

Confir! reuire!ents at pre7spud and rig 4isit.

-econdary flo" line tied in to #$D !anifold

#nclear "ell control strategy% responsibility for operating 4al4es3choes !ay result in "ell control proble!s.

22.;.=.2 22.2.2.;

Consult 'rocess Flo" Diagra!s for appropriate reco!!endations.

#$D3&'D -er4ice 'ro4ider !properly configured

$' stac

ell control proble!s !ay not be dealt "ith safely% resulting in possible loss of "ell control.

22.;.=.2 22.2.2.;

Consult 'rocess Flo" Diagra!s for appropriate reco!!endations.

perating Co!pany nsufficient ill fluid 3 ill

fluid density on location

Reference appropriate regulatory body regarding !ini!u! ill fluid 4olu!e reuire!ents. Gill fluid !ust be readily accessible.

perating Co!pany

Flo" through tubing spool or casing bo"l

ashout belo" $' !ay result in loss of "ell control.

/o flo" allo"ed through any 2* (or s!aller) flo". /o flo" through eualization lines.

perating Co!pany 3 #$D3&'D -er4ice 'ro4ider Dual annular is used for

surface pressure contain!ent

'otential hydrocarbon release% pressure at the rig floor% etc. if the stripping annular fails.

-afety consideration are si!ilar to the use of RCDs. 1nsure that the design of the stac !eets reco!!ended practices.

1:cessi4e bac pressure during single7 phase (liuid) &'D operations

'ossible for!ation breado"n at "ea point.

ell control proble!s3blo"out.

Job planning !ust include !a:i!u! allo"able surface pressure for the !ud "eight used for the operation. perational ad6ust!ents !ust be !ade based on the for!ation integrity test 3 leaoff gradient. Consider installing a pressure relief 4al4e upstrea! of the choe.