CORRECT SCALE.

4. Slowly open valve at pressure point.

5. Inspect tubing connections for leaks, repair as required.

6. Remove/add weights as required until piston 'floats' freely in required pressure range.

NOTE: a) Low pressure (range 1) Blue band on piston. b) High pressure (range 2) Red band on piston.

7. Total the value of weights, add value of weight carrier.

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ANCILLARY EQUIPMENT

3.24.2 PRESSURE/TEMPERATURE RECORDERS

1. Place the instrument close to the flowline manifold and connect up the necessary pipework. 2. Perform a zero check of the instrument with no pressure.

3. Connect temperature bulb:-

a) Insert the temperature bulb into the thermal well to its full depth. b) Secure the gland nut into the thermal well with a wrench.

c) With the bulb properly installed, secure the packing nut into the gland nut. 4. Connect the static pressure element:

a) Use 1/4" O.D. stainless tubing (wall thickness 0.065"), found inside the foxboro box, to connect up the process.

NOTE: On high pressure/temperature wells, autoclave fittings and liners rated to 15,000 psi will be used.

b) Plumb into the required range at the back of the foxboro. c) Connect remaining free end into the flowline manifold.

NOTE: Ensure suitable isolation valves are used to isolate process pressure prior to hooking up static pressure line.

5. Slowly open isolating valve(s) and allow process pressure to register pressure on the Recorder. 6. Observe pen movement and read pressure off chart. Check pressure against suitable pressure

gauge to ensure that the liner is not plugged.

3.24.3 CHEMICAL INJECTION PUMPS TEXSTEAM SERIES 5000/6000

1. To adjust for desired volume is done by either speeding the pump up or slowing it down, using the air inlet valve.

Different volumes can also be achieved by changing the plunger stroke to either long or short. This is done by moving the plunger travel pin to the plunger hole nearest the gland nut (for longest stroke) or to the back hole for short stroke.

2. Methanol injection should commence prior to the opening of a well after a shut-in period, at a rate determined from the Methanol Requirements for Lowering Freezing Points chart and stop once the temperature has risen above the appropriate line (to be read from the Temperature at Which Gas Hydrates will Freeze.

3. On High Deliverability wells, while flowing through the test separator, it may be necessary to inject methanol upstream of the back pressure valve to prevent hydrates across it. In this case a thermometer should be strapped (under cladding) to the pipework downstream of the B.P.V. and the charts mentioned above referenced again.

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ANCILLARY EQUIPMENT

1. CHECK ALL ACCESSORIES

All Ranarexs are sent offshore in a GRP container containing:- a) 1 - Ranarex

b) 1 - Tub of unused Silica gel c) 1 - 240 Vac to 115 Vac transformer d) 1 - 115 Vac plug lead

e) 1 - Vent hose f) 1 - Spare drive belt g) 1 - Spare connecting tape

2. SELECT LOCATION

The instrument should be easily visible and readily accessible from the operator's position, not near hot or cold objects. Allow at least 5" clearance on the left side and 3" on the right side for making connections and normal operating functions.

3. INSTALL TRANSFORMER

If the laboratory is fitted with 240 Vac supply connect the transformer to the socket on the side of the instrument - Do not start the instrument at this stage.

4. FILL AIR DRIER

The air drier must be removed from the upper left side of the instrument. Unscrew the two knurled thumb nuts from the studs. Draw the plastic drier out of the gravitometer just far enough so the rubber tube can be removed from the elbow at the rear of the drier. Remove the rubber closure plug on the front of the drier by lifting the lever at the centre of the plug (but do not turn the lever). Hold the drier horizontal with the front face up and pour silica gel through a funnel into the spout. Tap or shake the drier vigorously and continue to fill to the base of the spout. Replace the rubber closure, attach the rubber tube on the elbow at rear of drier, then install drier in gravitometer. The rubber tube has an internal spring to prevent collapse; do not remove or lose this spring.

The drier is permanently riveted together as an assembly. Do not attempt to remove the rivets and disassemble the drier.

The capacity of the silica gel will vary according to the atmospheric humidity and it should be inspected through the drier cover at regular intervals. When the upper half of the narrow compartment shows a change from deep blue colour to grey-pink colour, the silica gel must be removed.

Active silica gel has a deep blue colour and should be kept in a tightly closed container. Exhausted silica gel has a light greyish, pink colour and may be reactivated and used over and over again. Merely heat it in an open pan at about 250°F, for 2 hours, or until the dark blue colour returns, then store in a tightly closed container.

NOTE: It is advisable to cover the air holes on the front of the drier with tape, to prevent moisture from exhausting the silica gel, this MUST be removed prior to measuring the gas S.G. to allow the reference gas to be drawn in to the gravitometer.

5. ATTACH OUTLET HOSES

If the Ranarex is operated in a confined space, as inside a laboratory, the gas sample must be discharged outside of the unit. This will prevent contaminating the unit with noxious or hazardous gas and air mixture. If measuring only gas below 1.000 specific gravity, attach a hose to the "light gas outlet" nipple on the upper right side of the Ranarex case. If also measuring gases above 1.000

3.24

ANCILLARY EQUIPMENT

specific gravity, also attach a hose to the "heavy gas outlet" nipple. These hoses must remain attached when making "zero" check.

6. GAS FILTER

If the gas contains suspended particles larger than 25 microns, or if it is "wet", filtering is required. If a commercial filter is not available, a suitable filter may be made of 1" pipe, 15" long, mounted vertically. Cap both ends and install a drain cock in the bottom cap. Install an inlet connection from the gas line 2" from the bottom and an outlet to the Ranarex 2" from the top. Fill the pipe loosely with No.0 steel wool. Drain the filter frequently to keep the steel wool free of condensate.

7. GAS TEMPERATURE

If the gas pressure has been reduced more than 100 lb/in2, or if the gas flows through a temperature zone more than 10°F difference, from the ambient temperature of the gravitometer. If the gas is passed through a section of 3.8" liner at least 5'. (Preferably 10') long, exposed to the ambient temperature of the Gravitometer and located after the last pressure reduction, temperature adjustment will be automatic. The tube may be coiled or bent in the form of a grid to fit the space available.

8. LOCATION OF CONNECTIONS AND CONTROLS

CAUTION: The Ranarex is provided with a pointer lock which should be locked at all times when the Ranarex is not operating. The function of the lock is to exert tension on the flexible tape, which connects to the cam and reference wheel. This tension maintains correct "tracking" of the tape when the Ranarex is stopped. The user is cautioned to leave the lock applied until after the Ranarex motor has been started and to apply the lock before shutting off the motor, to avoid operating inconvenience and prevent damage to the Ranarex.

The "lock" position of the pointer is at the upper right corner of the scale, near the 0.970 - 1.030 graduations. The position of the locking mechanism is shown by the arrow of the knob and the legends on the Ranarex front cover.

To check if the pointer is locked, turn the knob to "UNLOCK" and observe if the pointer drifts downwards, even though slightly. Then turn the knob to the "LOCK" position and observe if the pointer snaps into the original position.

The correct procedure for operating the Ranarex gravitometer is described on the instruction plate located over the centre of the indicating scale. It is recommended that the user observes the sequence of steps as listed. By doing so maximum accuracy will be achieved with minimum effort and time. In fact, the user is encouraged to read each item of the instructions each time the instrument is used until the correct sequence becomes a matter of habit.

The following comments will also be helpful:- ZERO ADJUSTMENT

The zero adjust screw should be turned in the direction opposite to the correction required in the pointer reading. For example, if the pointer must be moved clockwise to read 1.000 on the scale, the screw should be turned counter-clockwise. After making adjustments, allow the pointer to stabilize because there is a tendency to overshoot when turning the zero adjust screw.

In normal operation the zero adjust screw should require only little adjustment, less than 1/4 turn, to set the pointer to 1.000. If more than 1/2 turn is ever required, stop the motor and investigate the cause. Never turn the screw full travel clockwise with the motor running; never turn the screw full travel counter-clockwise.