WELL HEAD FITTING
TEST PLUG BUSHING
1. Make up 11" Test plug assembly to the drill string.
2. Run the 11" Test Plug assembly on the drill string and land it in the casing spool bowl. 3. Test the BOP and connections above the 11"Nom.Test Plug Assembly by pressurising
through the drill string and bypass in the 11" Nominal Test Plug assembly. Remove the test Plug after testing.
4. Drill hole for 7"/ 5½” casing to prescribed depth.
Note : It is recommended to use BHEL 11" Bore Protector while drilling to protect the Casing Spool inner surface from damage.
10.4.3 7" / 5½” CASING AND WELLHEAD EQUIPMENT 10.4.3.1 Installation of 11 "Nom x 7" / 5½” Casing Hanger
See Sl. No. 2.2.1 for construction and installation of the Casing Hanger (BCMBNS/ BCMBFNS) . 1. Run the 7"/ 5½” casing. Space out the casing so that there is no collar located between the point of assembly above the BOP stack and the Casing Head/spool which would prevent the hanger from sliding down the BOP into position.
2. Center and Hold the 7" / 5½” casing to desired tension. Do not slack Off. 3. Position two boards across the top of the BOP Stack.
4. Open the hanger assembly by removing the latch pin wraps it around the 7" / 5½” Casing, place it on the Board and make up the latch pin.
Note : Type BCMBFNS - Casing Hangers is an automatic suspend and seal unit. It utilizes a metal hinge pin and a simple integral latch pin. It can be wrapped around the casing and lowered through BOP. Upon reaching the bowl in the casing spool body, it grips and suspends the casing string. The annulus is automatically and effectively sealed off upon slack off. No manual adjustments are necessary.
5. Remove Support boards. Lower the hanger through BOP Stack and make sure that the Hanger has seated in the Casing Spool.
6. Slack off the tension slowly to actuate the slips. Ensure that the slips have gripped the.casing securely.
7. Part the BOP stack.
8. Mark and cut off casing approximately 4" (102 mm) above the upper surface of Casing Spool Flange.
9. Remove burrs from the cut edges of the casing and ensure that the edge is smooth and level. 10.4.3.2 Installation of Primary Packing 11"Nom x 7" / 5½”
1. Pick and drop 11"Nom x 7"/ 5½” Primary packing lower support with the lip receiving face up over the casing and seat it into the Casing Spool body counter bore.
2. Clean and grease the casing as well as the inner and outer surfaces of the Primary packing and slide one side of the packing lip over the casing. Tap progressively around the packing with a hammer until the casing has completely entered the inner lips.
Caution: Do not cut or gouge the lips of the Packing during installation.
3. After the outer lips have fully entered the bevel in the bowl, drive the Packing down until it is flush with the Body Flange.
Note: If entrapped air hinders seating of packing, relieve the entrapped air through the inner / outer side of the primary packing using a screw driver.
4. Place the upper packing support, with the lip receiving face down over the casing, drop and drive it until it is flush with the Body Flange.
10.4.3.3 Installation of Secondary Packing 11"Nom. - 7" / 5½”
Install the Secondary Packing group by dropping the lower support with its lip receiving face up and then install the packing and upper support as described in Step 10.4.2.3.
10.4.3.4 Installation of tubing spool
1. Place Ring Gasket in place on the Casing Spool flange.
2. Pick up TUBING SPOOL and orientate it, taking into consideration wing valve directions and lower it over 7"/ 5½” Csg. carefully.
3. Make up the bottom flanged connection with stud bolts and nuts.
4. Hook up test pump to test port on lower flange of tubing spool. Test to maximum Working Pressure or 80% of collapse pressure of casing whichever is minimum.
Note : Remove Check Valve from test port before testing.
5. Bleed off test pressure, remove test pump and install check valve. 6. Reinstall Seal plug.
7. Nipple up BOP and riser.
10.4.3.5 Running the 7-1/16 "Nom. Test Plug Bushing 1. Make up 7-1/16" Test plug assembly to the drill string.
2. Run the Test Plug assembly on the drill string and land it in the Tubing spool bowl.
Note: Anchor screws on the Tubing head are to be backed out before lowering the 7-1/16" Nom. Test plug assembly.
3. Test the BOP and connections above the 7-1/16" Test Plug Assembly by pressurising through the drill string and bypass in the 7-1/16" Test Plug assembly.
4. Remove the test Plug after testing. 5. Drill hole to suit the 3½” / 2-7/8" Tubing.
Note : It is recommended to use BHEL 7-1/16"Bore Protector while drilling to protect the Tubing Spool inner surface from damage.
10.5 3½” / 2-7/8" TUBING AND WELLHEAD EQUIPMENT 10.5.1 Installation of 7-1/16" Nominal Tubing Hanger
1. Run the Tubing (along with Control line simultaneously, in case Control line provision is required) with the last joint suspended in the rotary slips.
2. Make up the Tubing Hanger bottom connection to the last joint of tubing to be run. Ensure that the Neck Seals are fitted in their respective grooves. In case of Control line provision, install the control line assay in the following manner:
a) Install swage lock fitting in the bottom of Hanger body. Tighten the fitting.
b) Connect the control line to the Tubing Hanger inlet. Strap the control line with the Tubing. 3. Connect the Back pressure valve Plug in the Back pressure valve and install the Assembly in
the Hanger.
4. Ensure that the Anchor Screws around the Tubing Spool are backed out. 5. Lower the Tubing Hanger through the BOP stack into the Tubing spool bowl.
6. Run in the Anchor Screws around the Tubing Spool to hold the Tubing Hanger in place. 7. Back out and retrieve the landing joint.
8. Nipple down the BOP stack and riser, being careful not to damage the sealing surfaces on the Tubing Hanger.
10.5.2 INSTALLATION OF X-MAS TREE
The complete X-mass tree has been assembled and tested in the plant prior to delivery to the well site.
1. Inspect Ring grooves at the bottom of X-Mass tree and top of Tubing Spool. 2. Install Ring Joint Gaskets in the Tubing Spool.
3. Lower the X-MAS TREE on to the Tubing Spool and make up the Flanged connection using the Stud bolts and nuts.
4. Test the connection through the test port on the bottom flange of X-mass Tree Bonnet. 5. In case of provision for Control line exit through Bonnet, connect the control line in the
following manner:
6. Install swage lock fitting at the Bonnet exit location. Tighten the fitting. 7. Connect the control line to Bonnet Exit.
8. Open all Valves.
9. In the case of Actuator operated valves, remove the 1/2" NPT Seal Plug and apply the Rated Control line pressure through the 1/2" NPT Inlet Port. Then remove the Thread Protector and Shipping Washer. Reinstall the Thread protector.