Dsq. Field Forthcoming planned S/D -

Hereunder are the depicted procedures for lines and vessels at inlet and outlet of CTP in order to enable carry out S/D activities safely and smoothly

- Some tasks will be carried out in concurrently while some to be in consequentially

The next procedures to be followed:

- Initiating total CTP plant S/Make sure the automatic S/D valves on all trunk lines, are positively closed.

- Open manual valves upstream pig receivers of NSG and NWSG wells - Use 2” cold flare lines to depressurize Sections upstream slug catcher of NSG wells, SSG wells and

12” section of NWSG wells use valves B&C Refer to attached Dwg. No. 1

6” trunk line of NSG1-1, 1-2

Both wells feeding the line will be closed-in using lower and upper master valves and further isolated from well side via closing manual wing valve, gas choke and manual 6” valve. Moreover, the 6” header manual isolation valve on the duplex flow line will be closed

- Completely depressurize the line Venting the gas from CTP side using 6” vent line to flare header (open manual valve A Dwg 1),now 6” trunk line is depressurized till SDV-30.01

- Open 2” manual valve to cold flare to depressurize the line section from automatic S/D valve…….. till the 16” inlet header

- Use 2” connection for tie-in with contractor (Spesco) N2 supply for line purge

Refer to attached Dwg. No. 112” trunk line of NWSG1-1

- The line will be kept pressurized till the automatic S/D valve SDV 32.06, then to be depressurized from that point till the 16” inlet header using the 2” cold flare ventUpon assuring the line is depressurized, start replacement activities of the passing 2”, 6” and 12” manual valves on NWSG line to inlet header Refer to attached Dwg. No. 1

Slug catcherSwitch over power generation to be used the diesel fuel generator.

- Bypass protection instrumentation on slug catcher and Lower the liquid levels (water to degasser and condensate to condensate stabilizer and) inside the vessel as low as possible

- Drive all liquids to closed drain vessel- Completely Depressurize slug catcher to flare using 2” depressurizing valve and open manholes for

ventilation- Upon measurement of O2 and gas concentration start vessel internal cleaning- All instrumentation –particularly liquid monitoring (condensate and water levels to be dismantled

and re-calibrated) - Refer to Dwg. No 2 (slug catcher )

LTS- Bypass protection instrumentation on slug catcher and Lower the liquid levels (condensate to

condensate stabilizer and MEG to pertinent storage tanks) inside the vessel as low as possible

That condensate to condensate stabilizer and MEG to pertinent storage tanks-- Drive all liquids to closed drain system through nozzles 13 and 14- Then Completely Depressurize slug catcher to flare using 2” depressurizing valve and open

manholes for ventilation- Upon measurement of O2 and gas concentration start vessel internal cleaning- Start vessel internal cleaning- All instrumentation –particularly liquid monitoring (condensate and MEG levels to be dismantled

and re-calibrated) regarding both vessels - Refer to Dwg. No 2 (slug catcher and Dwg. No. 3, 4 for LTS’s A &B)

DegasserUse degasser dumping pumps to lower produced water level till the trip level of the pumps and isolate the degasser using the manual valves then completely drain the vessel to closed drain system and depressurize to flare.Refer to Dwg. No…….

BVS1Upon initiating GPSD,

- Based on the sealing condition of 16” up and downstream the S/D valve SDV- 5302 there are two scenarios for isolation and depressurizingFirst

- Make sure 16” valves up and downstream S/D valve SDV- 5302 are positively sealing by testing for leak through 0.5” bleeding nipple

- Dismantle 0.5” connection of pressure gauges up/downstream the S/D valve SDV- 5302 to depressurize the 16” line section then apply proper quantity of N2 inside for purging.SecondIf the manual valve up/downstream aren’t sealing

- You will have to use the 4” vent valve to cold flare, in addition to the 4” vent line to flare system (installed on temp. pig launcher ) to depressurize the 16” line section from CTP to the BVS1 (refer to Dwg……………..)to flare system

BVS-2 (RPF area)

List of requirements’

NWSG TL: - 2 X 2” X 600 Sp. w gasket- 2 X 6” X 600 Sp. w gasket- 2 X 12” X 600 Sp. w gasket

Slug Catcher: - 2 X 24” RJ gasket- 2 X 4” 600 Sp. w gasket- 4 X 2” X 600 Sp. w gasket- 1 X 3” X 600 Sp. w gasket

LTS: - 2 X 24” RJ gasket- 3 X 2” 600 Sp. w gasket Gasket

Degasser