The wellhead installation standardization process

13-3/8 "casing head installation

1. 17-1/2 "drill bit drilling into the design well, pulling out the drilling tool, and then entering 13-3/8" surface casing to predetermined position, cementing.

2. Cut the 20 "catheter, then lift the upper portion of the catheter, with a height difference of 510mm from the 20" catheter, and the line with a rough cut of 13-3/8 ".

3. Remove the broken casing.

4. After measuring the height of the catheter, it should be cut with the height difference of 505mm from the catheter, and then cut 13-3/8 ".

5. Check the original horizontal condition of 13-3/8 with the horizontal ruler, if not, cut the higher part to the level.

6. Use gas cutting method to cut out the - end of the 3/8 "casing preliminary groove, groove in the wheel again into a 10 * 30 °, and asking for groove edges and a smooth feel.

7. The sealing parts of the surface outside casing string and with emery cloth "BT" seal ring will be part of the smooth, check the presence of groove (if any should be removed), and then used lubricating oil (grease) daub "BT" seal ring will be through the external surface of the casing string.

8. Use the hook hoist 13-3/8 "casing head, level as much as possible, check the" BT "seal on no installation right and in good condition (such as damage, must replace), cleaning" BT "seal, and then evenly smear a thin layer of lubricating oil (grease).

9. Adjust the position of the two sides of the casing head, centralize, smoothly lower the casing head, pay attention to the observation, and prevent the broken "BT" sealing ring.

10. After the casing head is placed in place, adjust the adjusting bolts on the bottom supporting circular chassis of the casing head to make the ring plate contact the catheter.

11. Weld ring steel plate and tube end face weld (ring steel plate and 13-3/8 "sleeve welding shall be determined by the user himself).

12. 13 - were examined with a spirit level in the plane of the 3/8 "casing head flange level, if not, can adjust the casing head adjusting bolt supporting circle at the bottom of the chassis, adjust the level, lock bearing round four locking bolts on the chassis.

13. Discharge a two plug at the bottom of the casing head, and on the opposite side of 180 ° symmetrical injection joint, injecting sealant BT seal injection molding operations.

14. After the test pressure is qualified, remove the test pressure pump and remove the pressure from the pressure cap to the test pressure joint.

15. Unscrew the 8 M30 x 3.5 slip bolts in the bottom of the kava, respectively, and the torque should be greater than (or equal to) 250N·m, with a guarantee slip to the casing.

16. Loosen the bearing round four locking bolt in the chassis, adjust bearing round four adjusting bolts on the chassis, to check whether the casing head slips and casing's prison (or with hook up to 5 ~ 10 tons of pulling force, to check whether the casing head slips and casing's prison), then four locking bolt locking.

17. In order to maintain the rigid throttle, the outlet pipeline of the pressure well pipe shall be unchanged from the ground level to prevent the shallow gas, and shall replace the four-way, bop stack and the mud outlet pipe on the head of the casing of 13-3/8.

18. Connect 13-3/8 "test pressure plug with the drill pipe, and through the mud outlet pipe, the blowout preventer group, and replace the four-way test plug to be put into, so that it is located on the shoulder of the casing head of 13-3/8".

19. The blowout preventer shall be pumped into 5000PSI (35MPa) water pressure by the drill pipe, and the test pressure shall be carried out on the connecting parts to check the sealing conditions everywhere.

20. After the test pressure is successful, release the pressure first, then open the blowout preventer, and retrieve 13-3/8 "test pressure plug.

21. By drill pipe connect to take out the tools and 13-3/8 "wear, and through the bop stack into 13-3/8" under wear, completes the relevant tags, turned into the flange on the four top silk, to resist wear, attention to wear can be set, not on the top of the tight, lest pressed flat against the ground, returned to take out the tools.

9-5/8 "casing head spool installation procedure

1. Use 12-1/4 "drill bit to drill down into the design well, get out the drill tool, return the four top wire, and use the feeding tool to recover 13-3/8" anti-wear sleeve.

2. Insert 9-5/8 "casing to the predetermined location of cementing, waiting for coagulation.

3. Remove 13-3/8 "casing head and replace the bolt and nut between the four links, and guard against the bop stack.

4. In the casing head flanges of 13-3/8, two boards are placed across to support the 9-5/8 "bushing assembly."

5. Carry 9-5/8 "casing to produce 4-5 tons of overtension.

6. Alignment split 9 - the 5/8 "casing hanger guide positioning pin, rotating casing hanger, close around 9 - the 5/8" casing discharged from the bottom up one by one will handle, remove the board and make the 9-5/8 "casing hanger component located to 13 - the 3/8" casing head shoulders, then relax 9-5/8 "casing, let slip around the casing, add 4 to 5 tons weight on the slip inspire rubber seal, and then seal the annular space.

7. From the flange surface about 6-3/4 "(170 mm), 9 - the 5/8" casing cutting, and will cut down a 10 * 30 ° groove.

8. 13 - the 3/8 "casing head, clean steel ring groove, and the steel ring groove place clean nondestructive BX160 seal rims, and then carefully put 9-5/8" casing cross from 9 - above the 5/8 "casing set up slowly, in two flange bolt tightening.

9. The Odyssey 9-5/8 "casing spool flange joint on the two lower, and on the opposite side of 180 ° symmetrical injection molding injection joint sealant, BT seal injection molding operations.

10. 9-5/8 "after BT sealing pressure testing qualified, replace cross the bop stack installation, mud outlet pipe under 9-5/8" pressure testing, pressure testing of each connection, check the sealing situation everywhere, after testing qualified, unloading first, after open the blowout preventer.


11. Remove the pressure testing, through the drill pipe and out into the tools, 9-5/8 "under wear, marking, twist wire into the top four on the flange, to resist wear, attention to wear can be set, don't be too tight, lest pressed flat against the ground, returned to take out the tools.

7 "casing installation procedure

1. Use the 8-1/2 "drill bit to drill down to the design well, pull out the drill tool, return the top wire, and use the feeding tool to recover the anti-wear sleeve.

2. Lower the 7 "casing to the predetermined location, cementing and waiting for coagulation. Remove the bolts and nuts betwee

n the sleeves and replace the four - pass, and watch out for the bop stack.

3. On the four-way flange of the casing, two pieces of planks are placed across to support the 7 "casing hanger assembly.

4. Top lift 7 "sleeve to produce 4~5 tons of super tension.

5. Alignment split 7 "casing hanger oriented locating pin, rotating casing hanger, close around 7" casing handle discharged from bottom up one by one, remove the board, to hang 7 "set of pipe components located to 9 - the 5/8" casing head shoulders, then relax 9-5/8 "casing, let slip around the casing, adding 4 ~ 5 tons of weight on the slip, stimulate the rubber seal, and then seal the annular space.

6. From the flange surface about 6-3/4 "(170 mm), cut 7" casing, and will cut down a 10 * 30 ° groove.

7. When drilling to well completion technology casing depth, under the casing and casing hanger hanging over, cutting 7 "casing flange surface distance of about 170 mm, the cylindrical casing with emery cloth to rust, and oil, casing top down 6 x 30 ° chamfer and smooth.


8. Clean casing head steel ring groove, and the steel ring groove place clean nondestructive BX158 seal rims, then carefully will slowly set into the tubing spool from 7 "casing above, two flanges bolted, tighten to specified torque.

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Tubing head installation

1. Before hoisting, check whether the flange specification and sealing parts of the tubing head are matched with the casing head, whether the sealing parts and sealing parts are damaged, and if there is any need to take timely measures.

2. Clean the sealing part of the casing hanger (or casing) and apply the butter. If the burr should be polished, if the sealing part is the casing, the groove should be cut and polished.

3. Fill the casing hanger (or casing) with the casing of the casing with the sealing grease EM08, then place the clean and undamaged sealing ring on the casing head.


4. The lifting tubing head (attention lifting position) is attached to the head of the casing, and the bolts and nuts are connected by symmetry.