A tubing hanger testing method

Abstract

The present application relates to tubing hanger testing technical field, especially a kind of tubing hanger testing method;The testing process of the technical solution sequentially verifies the interface between tubing hanger and simulated Christmas tree, tubing hanger locking mechanism operation, tubing hanger and tubing hanger recovery tool connection after underwater safety valve vertical hydraulic connector pressure integrity, locking mechanism integrity, annulus pressure integrity, tubing hanger horizontal crossing and simulated Christmas tree horizontal crossing device mechanical interface connection, tubing hanger body structure integrity, production channel spare non-metal seal, plug test pipeline static pressure body, test wire operation protective sleeve mechanical interface, wire operation isolation sleeve mechanical interface, wire operation isolation sleeve internal and external hydraulic pressure, tubing hanger production channel upper and lower metal seal pressure resistance integrity;The whole process is strong in systematicness, tubing hanger can be tested in order, reduce repetitive work, improve test efficiency.

Description

Technical Field

[0001] This invention relates to the field of tubing hanger testing technology, and more particularly to a tubing hanger testing method. Background Technology

[0002] Tubing hangers are key pieces of equipment in deep-sea oil and gas extraction. By suspending tubing inside the wellhead, they not only provide a production channel for oil flow but also facilitate the flow of downhole hydraulic control lines, cables, and chemical injection lines. They are crucial components connecting downhole tubing to subsea oil pipelines. During oil and gas extraction, a malfunction in a deep-water tubing hanger could lead to oil and gas leaks, polluting the marine environment, and even causing a blowout. Therefore, tubing hangers and their components require necessary testing before use. However, current technology lacks a method for detailed testing of tubing hangers and their components; existing testing methods are less systematic and less efficient.

[0003] Based on this, the applicant is considering designing an efficient testing method for tubing hangers. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is: how to provide an efficient method for testing tubing hangers.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a method for testing an oil pipe hanger, comprising the following steps:

[0006] Step 1: Interface test between the tubing hanger and the simulated tree of production;

[0007] Step 2: Underwater safety valve test;

[0008] Step 3: Initial integrity verification of the locking mechanism and annular metal seal test;

[0009] Step 4: Horizontal traversal interface testing;

[0010] Step 5: Hydraulic body test;

[0011] Step Six: Testing the interface of the wire mesh protective sleeve;

[0012] Step 7: Interface test of the steel wire operation isolation sleeve, and hydraulic test of the metal seal between the isolation sleeve and the upper / lower part of the production channel.

[0013] The working principle and advantages of the tubing hanger testing method in this technical solution are as follows:

[0014] The above testing process sequentially verifies the interface between the tubing hanger and the simulated tree, the operation of the tubing hanger locking mechanism, the pressure integrity of the underwater safety valve vertical hydraulic joint after the tubing hanger is connected to the tubing hanger retrieval tool, the integrity of the locking mechanism, the annular pressure integrity, the mechanical interface connection between the tubing hanger horizontal crossing and the simulated tree horizontal crossing device, the structural integrity of the tubing hanger body, the spare non-metallic seal of the production channel, the static pressure of the plug test pipeline body, the mechanical interface of the wireline protection sleeve, the mechanical interface of the wireline isolation sleeve, the internal and external hydraulic pressure of the wireline isolation sleeve, and the compressive strength integrity of the upper and lower metal seals of the tubing hanger production channel. The entire process is highly systematic, enabling orderly testing of the tubing hanger, reducing repetitive work, and improving testing efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the spare hole test according to an embodiment of the present invention;

[0016] Figure 2 This is a schematic diagram of the hydraulic channel test according to an embodiment of the present invention;

[0017] Figure 3 This is a schematic diagram of the installation of the downhole pressure and temperature sensor connector according to an embodiment of the present invention;

[0018] Figure 4 This is a schematic diagram of the wet joint sealing test of the downhole pressure and temperature sensor according to an embodiment of the present invention;

[0019] Figure 5 This is a schematic diagram of the sealing test of the dry connector of the downhole pressure and temperature sensor according to an embodiment of the present invention;

[0020] Figure 6 This is a schematic diagram simulating the installation of a wellhead in an embodiment of the present invention;

[0021] Figure 7 This is a schematic diagram of a downhole safety valve test according to an embodiment of the present invention;

[0022] Figure 8 This is a schematic diagram illustrating the verification of the locking mechanism and the annular metal seal test according to an embodiment of the present invention;

[0023] Figure 9 This is a schematic diagram of the hydraulic body test according to an embodiment of the present invention;

[0024] Figure 10 This is a schematic diagram of the internal hydraulic test of the wire mesh isolation sleeve according to an embodiment of the present invention;

[0025] Figure 11 This is a schematic diagram of the external hydraulic pressure and metal seal test of the steel wire operation isolation sleeve in an embodiment of the present invention;

[0026] Figure 12This is a schematic diagram of the static pressure test of the upper part of the lower blocker in an embodiment of the present invention;

[0027] Figure 13 This is a schematic diagram of the static pressure at the bottom of the lower blocker and the locking test of the lower blocker in an embodiment of the present invention;

[0028] Figure 14 This is a schematic diagram of the lower plug, annular metal seal, and upper / lower auxiliary sealing air pressure test of the production channel in an embodiment of the present invention;

[0029] Figure 15 This is a schematic diagram of the test of the lower blocker in the liquid circulation path according to an embodiment of the present invention;

[0030] Figure 16 This is a schematic diagram of the static pressure test of the upper blocker in an embodiment of the present invention;

[0031] Figure 17 This is a schematic diagram of the static pressure test of the metal seal of the passageway, the auxiliary seal at the top of the production passage, and the annular auxiliary seal in an embodiment of the present invention;

[0032] Figure 18 This is a schematic diagram of the upper plug locking, oil pipe hanger locking, and static pressure test at the bottom of the upper plug in an embodiment of the present invention.

[0033] Figure 19 This is a schematic diagram of the pressure test of the bottom of the upper blocker, the metal seal of the through channel, the metal seal of the production channel, and the annular auxiliary seal in an embodiment of the present invention.

[0034] Figure 20 This is a schematic diagram of the test of the upper blockage device in the liquid circulation path according to an embodiment of the present invention;

[0035] Figure 21 This is a schematic diagram of the static pressure test of the metal seal of the lower plug in an embodiment of the present invention;

[0036] Figure 22 This is a schematic diagram of the lower plug, annular metal seal, and upper / lower auxiliary sealing air pressure test of the production channel in an embodiment of the present invention;

[0037] In the above attached figures: 1. Hydraulic supply unit; 2. Pressure relief valve; 3. Auxiliary venting end; 4. Pressure holding pipeline; 5. Auxiliary venting pipeline; 6. Test pressure; 7. Monitoring area; 8. Balanced pressure area; 9. Flow area; 101. Plug; 102. Hydraulic connector; 103. Hydraulic passage; 104. Wet connector for downhole pressure and temperature sensor; 105. Dry connector for downhole pressure and temperature sensor; 200. Simulated Christmas tree; 210. Upper passage test hole; 211. Upper passage auxiliary test line; 212. Crossing passage test line; 213. Upper auxiliary test line for production passage; 214. Production passage test line; 215. Lower auxiliary test line for production passage; 216. Annularity auxiliary test line; 217. Guide tube test line; 218. Steel ring; 219. Crossing device; 221. Plug test line. Detailed Implementation

[0038] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0039] Refer to together Figures 1 to 22 This embodiment provides a tubing hanger testing method, which includes pre-test preparation: s1 Clean an area of ​​the workshop to ensure sufficient clearance to accommodate the tubing hanger, tubing hanger retrieval tool, and top test cap of the tubing hanger retrieval tool all stacked and installed at a simulated tree height of 200mm; s2 Visually inspect all equipment during factory acceptance testing. Check all equipment for damage and cleanliness; special attention should be paid to seals, sealing holes, metal sealing surfaces, hydraulic joints 102 and fittings, and electrical pass-through connector systems; s3 Before testing, check threads and sealing grooves for debris, burrs, scratches, grit, or other foreign objects, and remove them; check the sealing ring lip to ensure it is clean and free of scratches; s4 Remove the plugs 101 from all hydraulic joints 102 on the tubing hanger.

[0040] The following test steps are also included:

[0041] Step 1: Static pressure test of the hydraulic pipeline body

[0042] like Figure 1As shown, the spare port test is performed first: s1 Install test plug 101 and test hydraulic connector 102, and install hydraulic hose to hydraulic supply unit 1. The pipeline should be perpendicular to the vent valve to allow air to escape from the system; s2 Add test fluid to the pipeline through hydraulic connector 102 to expel as much air as possible from the system, ensuring that all pipelines and ports are emptied; s3 Initial pressure test: Introduce test pressure 6 through hydraulic connector 102, isolate and hold the pressure; specifically, the pressure is 15000 psi, held for 3 minutes, and record the results; s4 Depressurize; s5 Second pressure test: Introduce test pressure 6 through hydraulic connector 102, isolate and hold the pressure; specifically, the pressure is 15000 psi, held for 15 minutes, and record the results; s6 Depressurize; s7 Complete the above steps for all remaining hydraulic lines; s8 Remove test hydraulic connector 102.

[0043] like Figure 2 As shown, the hydraulic channel 103 test (with horizontal crossing test tool) is then performed: s1. Configure the horizontal crossing device 219 test tool correctly according to the interface specifications of the horizontal crossing device 219; s2. Use four M12 socket head cap screws to install the horizontal crossing device 219 test tool onto the mounting surface of the tubing hanger horizontal crossing device 219, with a torque of 40 N*M ± 10%; s3. Install the top connector of the horizontal crossing device 219 test tool and connect it to the hydraulic relief line; s4. Install the underwater safety valve vertical test plug 101 in the underwater safety valve hole at the top of the tubing hanger; s5. Install the hydraulic connector 102 and hydraulic hose at the bottom of the tubing hanger and connect them to the hydraulic supply unit 1; s6. Connect the relief line to the horizontal crossing device 219 test tool; s7. Pass through the tubing hanger... Hydraulic connector 102 is filled with test fluid, which is then returned through the horizontal crossing test tool to remove as much air as possible from the system; s8 Initial pressure test: Test pressure 6 is introduced through hydraulic connector 102, isolated and held at 15000 psi for 3 minutes; the results are recorded; s9 Depressurization; s10 Second pressure test: Test pressure 6 is introduced through hydraulic connector 102, isolated and held at 15000 psi for 15 minutes; the results are recorded; s11 Depressurization; s12 Install the top connector of the horizontal crossing device 219 test tool and confirm that the fluid can flow normally; s13 Test all other upper and lower horizontal crossing device 219 test tool hydraulic lines according to the above steps; s14 Remove the horizontal crossing device 219 test tool.

[0044] The above section describes the static pressure test of the hydraulic lines of the tubing hanger. This test will verify the structural integrity of the tubing hanger and test the installed hydraulic joint 102 to confirm the pressure integrity of the hydraulic joint 102 and the seal.

[0045] Step 2: Pressure and Temperature Through Pipeline Test

[0046] like Figure 3 and Figure 4 As shown, the following steps are performed first: s1 Visually inspect the threads of the connector hole at the electrical crossing plane and the threads of the connector hole on the lower end face of the tubing hanger body. The threads must be free of coatings, corrosion, hard foreign objects, burrs, and other impurities or damage. s2 Before installation, ensure that the threads of the interface test connector and the connector hole threads of the hanger body can be freely screwed together, and lubricate as needed. s3 Check and assemble the seal of the downhole pressure and temperature sensor wet connector 104, and apply grease to the sealing ring. s4 Install the downhole pressure and temperature sensor wet connector 104 to the horizontal crossing plane. The torque is 135 N*M ± 10%; s5 Install the test connector and test hose to the wet connector 104 of the downhole pressure and temperature sensor; s6 Empty the air in the system as much as possible through the auxiliary vent 3; s7 Initial pressure test, introduce the test pressure 6 through the hydraulic connector 102, isolate and hold the pressure; specifically, the pressure is 10000 psi, hold the pressure for 3 minutes, and record the results; s8 Depressurize; s9 Second pressure test, introduce the test pressure 6 through the hydraulic connector 102, isolate and hold the pressure; specifically, the pressure is 10000 psi, hold the pressure for 15 minutes, and record the results; s10 Depressurize.

[0047] like Figure 3 and Figure 5 As shown, the following tests are performed on the downhole pressure and temperature sensor dry connector 105: s1 Visually inspect the threads of the connector hole at the electrical penetration plane and the threads of the connector hole on the lower end face of the tubing hanger body. The threads must be free of coatings, corrosion, hard foreign objects, burrs, and other impurities or damage. s2 Before installation, ensure that the threads of the interface test connector and the connector hole threads of the hanger body can be freely screwed together, and lubricate as needed. s3 Check and assemble the seal of the downhole pressure and temperature sensor dry connector 105, and apply grease to the sealing ring. s4 Install the downhole pressure and temperature sensor dry connector 105 to the bottom plane of the tubing hanger. The torque is 122 N*M ± 10%; s5 Install the test connector and test hose to the dry connector 105 of the downhole pressure and temperature sensor; s6 Empty the air in the system as much as possible through the auxiliary vent end 3; s7 Initial pressure test, introduce test pressure 6 through hydraulic connector 102, isolate and hold the pressure; specifically, the pressure is 10000 psi, hold the pressure for 3 minutes, and record the results; s8 Depressurize; s9 Second pressure test, introduce test pressure 6 through hydraulic connector 102, isolate and hold the pressure; specifically, the pressure is 10000 psi, hold the pressure for 15 minutes, and record the results; s10 Depressurize.

[0048] Then conduct electrical tests: s1 performs a casing electrical continuity test on the downhole pressure and temperature sensor pressure-temperature crossover system, with an acceptance standard of <0.1Ω; s2 performs a DC resistance test on the downhole pressure and temperature sensor pressure-temperature crossover system, with an acceptance standard of <0.1Ω; s3 performs an insulation resistance test on the downhole pressure and temperature sensor pressure-temperature crossover system, with an acceptance standard of >20GΩ.

[0049] Step 3: Testing the interface between the tubing hanger retrieval tool and the tubing hanger.

[0050] S1 Confirm that the tubing hanger retrieval tool and the top test cap assembly of the tubing hanger retrieval tool are installed and undamaged; specifically, pay special attention to the production hole sealing section and control sealing rod. The locking ring of the top test cap of the tubing hanger retrieval tool and the trapezoidal thread on the body of the tubing hanger retrieval tool should be kept clean and undamaged. S2 Measure and record the outer diameter of the locking ring of the tubing hanger in the unlocked state with an outside micrometer. If the diameter of the locking ring exceeds the acceptance standard, the locking ring must be adjusted or reinstalled. The acceptance standard is ≤472.9mm. S3 Visually inspect the cleanliness and undamaged non-metallic sealing surfaces of the tubing hanger and apply a small amount of sealing grease for lubrication. S4 Install the top test cap of the tubing hanger retrieval tool onto the top of the tubing hanger retrieval tool. S5 Install the tubing hanger retrieval tool onto the tubing hanger.

[0051] Specifically, the above tests will verify the interface between the tubing hanger and the tubing hanger retrieval tool, and confirm the correct operation of the locking mechanism of the tubing hanger retrieval tool.

[0052] Step 4: Testing the interface between the tubing hanger and the simulated Christmas tree 200

[0053] like Figure 6 As shown, first prepare the simulated wellhead 200: s1. Adapt and install the horizontal cross-connector 219 to the simulated wellhead 200. The horizontal cross-connector 219 will be installed together with the BX169 test steel ring 218. A torque of 4150 N*m ± 10% needs to be applied to the non-standard nut of the horizontal cross-connector 219 to fix it; s2. Remove the plugs 101 of the test holes below the simulated wellhead 200: upper channel auxiliary test hole, cross-connection channel test hole, upper auxiliary test hole of the production channel, production channel test hole, lower auxiliary test hole of the production channel, annulus auxiliary test hole, and guide tube test hole; s3. Connect the liquid outlet pipeline; s4. Install the dust cap of the simulated wellhead 200 to the top of the simulated wellhead 200.

[0054] Next, perform the interface test between the tubing hanger and the simulated tree 200: s1 lower the tubing hanger to the simulated tree 200; s2 remove the tubing hanger retrieval tool from the tubing hanger; s3 use the tubing hanger installation tool to press the tubing hanger in; s4 reinstall the tubing hanger retrieval tool to the tubing hanger and lock the tubing hanger to the simulated tree 200.

[0055] Specifically, the above test process will verify the interface between the tubing hanger and the simulated tree 200, and verify the operation of the tubing hanger locking mechanism.

[0056] Step 5: Underwater safety valve test

[0057] like Figure 7 As shown, s1 connects the hydraulic line to the underwater safety valve interface on the top test cap of the tubing hanger recovery tool and connects it to hydraulic supply unit 1; s2 performs an initial pressure test, isolating and holding the pressure; specifically, the pressure is 15000 psi, held for 3 minutes, and the results are recorded; s3 depressurizes; s4 performs a second pressure test, isolating and holding the pressure at 15000 psi for 15 minutes, and the results are recorded; s5 depressurizes.

[0058] Specifically, the above test will verify the pressure integrity of the underwater safety valve vertical hydraulic joint 102 after the tubing hanger is connected to the tubing hanger recovery tool.

[0059] Step Six: Initial Integrity Verification of Locking Mechanism and Annular Metal Seal Test

[0060] like Figure 8As shown, s1 removes the tubing hanger retrieval tool from the tubing hanger; s2 removes the protective cap of the simulated tree 200 and sets it aside for later use; s3 installs the tubing hanger installation tool onto the H4 profile of the simulated tree 200, which will serve as an independent shield in case the tubing hanger locking mechanism fails; s3 closes the outlet end of the guide tube test line 217 on the simulated tree 200; s4 opens the pressure relief valve 2 at the outlet ends of the production channel test line 214, the crossing channel test line 212, and the annulus auxiliary test line 216 of the simulated tree 200 to monitor for leaks; s5 directs liquid to the bottom of the tubing hanger through the inlet end of the guide tube test line 217 on the simulated tree 200. Provide static pressure, isolate and hold pressure at 10,000 psi for 3 minutes, and record the results; s6 Depressurize the bottom of the tubing hanger; s7 Provide static pressure to the bottom of the tubing hanger through the inlet end of test line 217 of the simulated tree 200 guide tube, isolate and hold pressure at 10,000 psi for 15 minutes, and record the results; s8 Depressurize the bottom of the tubing hanger, and confirm with a pressure gauge that the pressure has been depressurized in both the initial and auxiliary depressurization lines; s9 Release the tubing hanger installation tool from the tubing hanger and remove the tubing hanger installation tool; s11 Reinstall the protective cap to protect the simulated tree 200 profile.

[0061] Specifically, during the tubing hanger body test, the tubing hanger will be subjected to a net upward pressure load, with the tubing hanger locking mechanism serving as the sole retention mechanism. The aforementioned test will subject the tubing hanger to an upward thrust exceeding that generated during the body test, to conduct preliminary verification of the integrity of the locking mechanism and reduce the risk of locking mechanism failure under pressure. The annular metal seal will also be tested to verify the annular pressure integrity.

[0062] Step 7: Horizontal Traversal Interface Testing

[0063] s1 Confirm that the horizontal crossing device 219 has been adapted to the horizontal crossing interface position of the simulated production tree 200, and confirm that the configuration of the horizontal crossing device 219 matches the tubing hanger; s2 Release all horizontal crossing pipelines; s3 Verify the crossing rod and record the results.

[0064] Specifically, the above test will verify the connection between the horizontal crossing of the tubing hanger and the mechanical interface of the simulated tree 200 horizontal crossing device 219.

[0065] Step 8: Hydraulic Body Test

[0066] like Figure 9As shown, s1 installs the tubing hanger retrieval tool onto the tubing hanger and locks the tubing hanger; s2 uses the test cap end at the top of the tubing hanger retrieval tool to put the production channel pipeline of the tubing hanger in a venting state; ensures the valve is open and the pipeline vents to the corresponding hydraulic oil recovery tank; s3 closes the following outlet pipelines on the simulated tree 200: production channel test pipeline 214, upper auxiliary test pipeline 213 of the production channel, lower auxiliary test pipeline 215 of the production channel, and guide tube test pipeline 217; s4 installs the following inlet test pipeline on the simulated tree 200: production channel test pipeline 214... The upper auxiliary test line 213 and the lower auxiliary test line 215 of the production channel are used to fill the production channel with test fluid until liquid is observed in the production hole of the test cap on the top of the tubing hanger recovery tool. After removing as much air as possible from the system, the production hole of the test cap on the top of the tubing hanger recovery tool is blocked. At step s5, the test lines at the liquid outlet ends above and below the simulated tree 200 are opened: the through-channel test line 212 and the annular auxiliary test line 216 are used to monitor for leaks. At step s6, pressure is applied through the production channel test line 214, the upper auxiliary test line 213, and the lower auxiliary test line 215. 2 / 3 of the test pressure 6 is supplied to the production channel of the tubing hanger, isolated and held until the pressure stabilizes; s7 provides hydraulic pressure to the lower part of the tubing hanger through the simulated Christmas tree 200 guide tube test line 217, isolated and held until the pressure stabilizes; s8 increases the pressure to the complete test pressure 6 through the production channel test line 214, the upper auxiliary test line 213 of the production channel, and the lower auxiliary test line 215 of the production channel, isolates and holds the pressure for the first time, pressurizes to 15000 psi, holds for 3 minutes, and records the results; s9 depressurizes the production channel; s10 supplies hydraulic pressure through the production channel test line 214. The upper auxiliary test line 213 and the lower auxiliary test line 215 of the production channel are pressurized to a complete test pressure of 6 to the production channel of the tubing hanger. The pressure is then isolated and held for a second time at 15000 psi for 15 minutes, and the results are recorded. The production channel is depressurized (s11), and it is confirmed that the pressure gauges at both the inlet and outlet ends have been depressurized. Liquid flow must be confirmed to be passing through the outlet ends of the production channel test line 214, the upper auxiliary test line 213, and the lower auxiliary test line 215. The bottom balance pressure of the tubing hanger (s12) is depressurized, and it is confirmed that the pressure gauges at both the inlet and outlet ends have been depressurized.

[0067] Specifically, the above tests were conducted to verify the structural integrity of the tubing hanger. To prevent excessive wear on the surface of the simulated tree 200, pressure balancing was used after the metal seal of the production channel. Therefore, the spare non-metallic seal of the production channel was also tested. In addition, the test will complete the static pressure test of the plug test line 221.

[0068] Step Nine: Interface Test of Wire Mesh Protective Sleeve

[0069] S1 Remove the tubing hanger recovery tool; S2 Install and recover the wireline work protective sleeve and observe.

[0070] Specifically, the above test will test the mechanical interface of the wire mesh protective sleeve, which does not contain pressure.

[0071] Step 10: Interface test of the wire mesh isolation sleeve, and hydraulic test of the metal seal between the isolation sleeve and the upper / lower part of the production channel.

[0072] First, perform the wireline operation isolation sleeve interface test: s1 Inject test liquid into the production channel through the production channel test line 214 on the simulated tree 200 until the liquid level reaches the upper plug profile position; s2 Release the test line 221 that horizontally crosses the plug and the production channel test line 214 on the simulated tree 200, ensuring that the liquid outlet position of the line is higher than the liquid level to prevent the test liquid from flowing out; s3 Install the wireline operation isolation sleeve; s4 Install the tubing hanger retrieval tool to the tubing hanger and lock the tubing hanger to the simulated tree 200.

[0073] like Figure 10 As shown, the internal hydraulic test of the wire rope operation isolation sleeve is then performed: s1 Install the hydraulic test line of the production channel of the top test cap of the tubing hanger retrieval tool, and install the hydraulic hose to the hydraulic supply unit 1. The vent valve should be installed perpendicular to the pipeline to allow air to escape from the system; s2 Fill the tubing hanger retrieval tool and isolation sleeve with test fluid through the production channel pipeline of the top test cap of the tubing hanger retrieval tool to purge air from the system as much as possible; s3 Release the liquid from the production channel test line 214 and the guide cylinder test line 217 at the liquid outlet end to monitor for leaks; s4 Pass the oil... The test cap on the top of the tubing hanger recovery tool supplies hydraulic test pressure 6 to the isolation sleeve via the production channel test line 214. The first isolation and pressure holding is performed at 10000 psi for 3 minutes, and the results are recorded. Pressure is released at step 5. At step 6, hydraulic test pressure 6 is supplied to the isolation sleeve via the production channel test line 214 on the top of the tubing hanger recovery tool. The second isolation and pressure holding is performed at 10000 psi for 15 minutes, and the results are recorded. Pressure is released at step 7, and the pressure is confirmed to be completely released using a pressure gauge. All the above steps are confirmed to be completed.

[0074] like Figure 11As shown, the following tests are performed: external hydraulic testing of the wireline operation isolation sleeve and metal seal testing of the upper / lower production channel: s1 Install the plugger hydraulic test line on the simulated tree trunk 200; s2 Open the production channel vent valve on the test cap of the tubing hanger recovery tool, and simultaneously close the inlet and outlet vent valves of the production channel test line 214; Open the outlet vent valves of the following lines to monitor for leaks: crossing channel test line 212, upper auxiliary test line 213 of the production channel, and lower auxiliary test line 215 of the production channel; s3 Through the production channel test line 214 to... The wireline work isolation sleeve provides external hydraulic test pressure 6. First isolation and pressure holding: pressurize to 10000 psi, hold for 3 minutes, and record the results; s4 depressurize; s5 provide external hydraulic test pressure 6 to the wireline work isolation sleeve through production channel test line 214. Second isolation and pressure holding: pressurize to 10000 psi, hold for 15 minutes, and record the results; s6 depressurize, confirming complete pressure release via pressure gauge, confirming all above steps are completed; s7 remove the tubing hanger recovery tool from the tubing hanger; s8 recover the wireline work isolation sleeve.

[0075] Specifically, the above tests include mechanical interface testing of the wire rope working isolation sleeve and internal and external hydraulic testing of the wire rope working isolation sleeve; the external pressure test of the isolation sleeve will also confirm the compressive integrity of the upper / lower metal seal of the tubing hanger production channel.

[0076] Step 11: Installation and testing of the lower blocker

[0077] s1 Visually inspect the lower plug for damage, paying particular attention to the V-group seal; s2 Remove the retaining ring from the lower plug; s3 Visually inspect to confirm that all shear pins have been removed from the plug and clean up any debris; s4 Install the simulated metal seal and sealing ring; s5 Reinstall the retaining ring, ensuring it contacts the sealing ring to secure the simulated metal seal; s6 Install the lower plug.

[0078] Step 12: Static pressure seal test of the upper part of the lower plug

[0079] like Figure 12As shown, s1 installs the tubing hanger retrieval tool to the tubing hanger and locks the tubing hanger to the simulated tree 200; s2 installs the hydraulic test line to the production channel of the test cap on top of the tubing hanger retrieval tool; the vent valve should be installed vertically to the line to allow air to escape from the system; s3 fills the tubing hanger retrieval tool and the portion above the lower plug of the tubing hanger with test fluid through the production channel line of the test cap on top of the tubing hanger retrieval tool until test fluid can be seen draining from the vent valve of the test cap on top of the tubing hanger retrieval tool, purging as much air as possible from the system, and then closes the vent valve; s4 vents the outlet end of the test line 214 in the production channel of the simulated tree 200 to monitor for leaks. Ensure the entire pipeline outlet is above the liquid level in the monitoring area to prevent test fluid from flowing out; s5. Close the simulated tree 200 horizontally crossing the upper plug test pipeline 221; s6. Apply static pressure to the upper space of the plug through the production channel pipeline of the test cap at the top of the tubing hanger recovery tool; first isolation and pressure holding, pressurize to 10000 psi, hold for 3 minutes, and record the results; s7. Depressurize; s8. Apply static pressure to the upper space of the plug through the production channel pipeline of the test cap at the top of the tubing hanger recovery tool, second isolation and pressure holding, pressurize to 10000 psi, hold for 15 minutes, and record the results; s9. Depressurize, confirm complete depressurization using a pressure gauge, and confirm that all the above steps have been completed.

[0080] Specifically, the above test will confirm the integrity of the V-group seal of the lower plug when pressure comes from the upper part.

[0081] Step Thirteen: Static pressure seal test at the bottom of the lower plug and locking test of the lower plug

[0082] like Figure 13As shown, s1 removes the tubing hanger retrieval tool from the tubing hanger; s2 fills the upper part of the lower plug of the production orifice of the tubing hanger with water until the liquid level reaches the inner diameter groove of the tubing hanger body; s3 installs a camera system on the tubing hanger and confirms the operating status; s4 installs a test connector to the top H4 profile of the simulated tree 200, which will act as an independent barrier when the tubing hanger locking structure fails; s5 installs the following test lines: production channel test line 214, upper auxiliary test line 213 of the production channel, lower auxiliary test line 215 of the production channel, annulus auxiliary test line 216, and guide line. Test line 217, test pressure 6 should be supplied to each pipeline chamber simultaneously to prevent low torque test joint thread failure; s6 fills the test fluid into the bottom chamber of the lower plug inside the tubing hanger, and supplies the test fluid through the following test lines: inlet of production channel test line 214, inlet of upper auxiliary test line 213 of production channel, inlet of lower auxiliary test line 215 of production channel, inlet of annular auxiliary test line 216, and inlet of guide tube test line 217; until the test fluid flows back from the outlet of the above lines, try to purge the air in the system, and then close the vent valve at the outlet of the above lines; open the vent valve at the outlet of the following lines to... Leakage monitoring: Through the test line 212, plug test line 221, and test connector test line; s7: Pressure is supplied to the bottom chamber of the lower plug inside the tubing hanger via the inlet of the production channel test line 214, the inlet of the upper auxiliary test line 213, the inlet of the lower auxiliary test line 215, the inlet of the annulus auxiliary test line 216, and the inlet of the guide tube test line 217. First isolation and pressure holding are performed, pressurizing to 15000 psi and holding for 3 minutes, and the results are recorded; s8: Depressurization; s9: Through the inlet of the production channel test line 214 and the upper auxiliary test line 215... Pressure is supplied to the bottom chamber of the lower plug inside the tubing hanger from the inlet end of line 13, the inlet end of auxiliary test line 215 in the lower part of the production channel, the inlet end of auxiliary test line 216 in the annulus, and the inlet end of test line 217 in the guide tube. A second isolation and pressure holding process is performed, with a pressure of 15000 psi and a holding time of 15 minutes. The results are recorded. Pressure is then released from pressure chamber S10, confirming that the pressure gauges at both the inlet and outlet ends have completed the pressure release process. The pressure release process is confirmed to be completed at test lines 214 in the production channel, 213 in the upper part of the production channel, 215 in the lower part of the production channel, 216 in the annulus, and 217 in the guide tube.

[0083] Specifically, the above test will confirm the integrity of the V-group seal of the lower plug when pressure comes from the bottom, and at the same time confirm the locking capability of the lower plug. The test pressure 6 will be 1.5 times the rated working pressure of the tubing hanger.

[0084] Step Fourteen: Pressure sealing test of lower plug, annular metal seal, and upper / lower auxiliary seals in the production channel.

[0085] like Figure 14 As shown, s1 drains all liquid from the lower cavity of the lower plug; s2 confirms that the test connector has been installed on the top of the simulated tree 200 and that the video monitoring system is in place; s3 opens the drain valves at the outlet of the through-channel test line 212, the outlet of the annular auxiliary test line 216, and the drain valve of the test connector test line to monitor for leaks; s4 installs the pneumatic test lines to the following lines: production channel test line 214, upper auxiliary test line 213 of the production channel, lower auxiliary test line 215 of the production channel, and guide tube test line 217; simultaneously closes the drain valves at the outlets of the above lines; s5 drains the liquid from the inlet of the following lines into the lower plug. The lower cavity of the plug is pressurized: production channel test line 214, upper auxiliary test line 213, lower auxiliary test line 215, and guide tube test line 217 are isolated and pressurized to 10,000 psi for 15 minutes. Leakage is monitored and recorded using a video monitoring system. S6 depressurizes the line by confirming that all inlet and outlet ends have been depressurized using pressure gauges. The depressurization process is confirmed to be completed on production channel test line 214, upper auxiliary test line 213, lower auxiliary test line 215, and guide tube test line 217. S7 removes the lower plug.

[0086] Specifically, the following tests will confirm the initial sealing pressure integrity of the lower plug V group seal, the upper / lower auxiliary seals of the production channel, and the annular metal seal under pneumatic pressure.

[0087] Step 15: Installation and testing of the upper blocker

[0088] s1 Visually inspect the lower plug for damage, paying particular attention to the V-group seal; s2 Remove the retaining ring from the lower plug; s3 Visually inspect to confirm that all shear pins have been removed from the plug and clean up any debris; s4 Install the simulated metal seal and sealing ring; s5 Reinstall the retaining ring, ensuring it contacts the sealing ring to secure the simulated metal seal; s6 Install the upper plug.

[0089] Step Sixteen: Static Pressure Sealing Test of Upper Blocker

[0090] like Figure 16As shown, s1 installs the tubing hanger retrieval tool to the tubing hanger and locks the tubing hanger to the simulated tree 200; s2 installs the hydraulic test line to the production channel of the test cap on top of the tubing hanger retrieval tool, and the vent valve should be installed vertically to allow air to escape from the system; s3 fills the tubing hanger retrieval tool and the part above the upper plug of the tubing hanger with test fluid through the production channel line of the test cap on top of the tubing hanger retrieval tool until test fluid can be seen draining from the vent valve of the test cap on top of the tubing hanger retrieval tool, purging as much air as possible from the system, and then closes the vent valve; s4 vents the test fluid from the production channel of the simulated tree 200. Test line 214 outlet and plug test line 221 are used to monitor for leaks, ensuring that the entire line outlet is above the liquid level in the monitoring area to prevent test fluid from flowing out; s5 provides static pressure to the upper space of the plug through the production channel line of the test cap at the top of the tubing hanger recovery tool, isolates and holds pressure for the first time, pressurizes to 10,000 psi, holds pressure for 3 minutes, and records the results; s6 depressurizes; s7 provides static pressure to the upper space of the plug through the production channel line of the test cap at the top of the tubing hanger recovery tool, isolates and holds pressure for the second time, pressurizes to 10,000 psi, holds pressure for 15 minutes, and records the results; s8 depressurizes, confirming complete depressurization using a pressure gauge.

[0091] Specifically, the above test will confirm the integrity of the V-group seal of the upper plug when pressure comes from the upper part.

[0092] Step 17: Static pressure test of the metal seal of the passageway, the upper auxiliary seal of the production passageway, and the annular auxiliary seal.

[0093] like Figure 17As shown, s1 removes the tubing hanger recovery tool; s2 installs the test connector to the top H4 profile of the simulated tree 200. This tool will act as a separate barrier when the tubing hanger locking structure fails; s3 confirms the horizontal crossover device 219 is fully installed and confirms all horizontal crossover lines have been depressurized for leak monitoring. Installs hydraulic test lines to crossover channel test line 212, guide tube test line 217, and annulus auxiliary test line 216; s4 fills the cavity with test fluid, removing as much air as possible from the outlet of crossover channel test line 212, guide tube test line 217, and annulus auxiliary test line 216. After the air is removed, close the vent valves at the outlets of the above lines; s5 opens the vent valves of the following test lines for leak monitoring: outlet of upper channel auxiliary test line 211 and outlet of upper auxiliary test line 213 in the production channel. S6. The liquid outlet of the auxiliary test line 215 at the bottom of the production channel; S7. Static pressure is supplied to the lower cavity of the crossing channel and tubing hanger through the crossing channel test line 212, guide tube test line 217, and annular auxiliary test line 216. The first isolation and pressure holding is performed at 10,000 psi for 3 minutes; S8. The pressure is released; S9. Static pressure is supplied to the lower cavity of the crossing channel and tubing hanger through the crossing channel test line 212, guide tube test line 217, and annular auxiliary test line 216. The second isolation and pressure holding is performed at 10,000 psi for 15 minutes; S10. The pressure is released in each channel. The pressure gauge at the liquid inlet is used to confirm that the pressure has been released. The independent pressure gauges at the liquid outlet are also checked to confirm that the liquid outlets of the crossing channel test line 212, guide tube test line 217, and annular auxiliary test line 216 have been completed as required above.

[0094] Specifically, the above test will verify the pressure integrity of the metal seal of the tubing hanger crossing passage and the upper auxiliary seal (non-metallic seal) of the production passage; in addition, the test will also verify the external pressure integrity of the horizontal crossing joint seal and the pressure integrity of the annular auxiliary seal when the pressure comes from the lower part.

[0095] Step 18: Upper plug lock-up test, tubing hanger lock-up test, and upper plug bottom static pressure test.

[0096] like Figure 18As shown, s1 fills the upper production channel of the plug with test fluid until the fluid level reaches the internal groove of the tubing hanger body; s2 installs a camera monitoring system on the tubing hanger to confirm its operability; s3 installs a test connector to the top H4 profile of the simulated Christmas tree 200. This tool will act as an independent barrier when the tubing hanger locking structure fails; s4 installs hydraulic lines to the following test interfaces: guide tube test interface, annular auxiliary test interface, lower auxiliary test interface of the production channel, and production channel test interface. The auxiliary test interface at the top of the production channel should be supplied with test pressure 6 simultaneously to prevent low-torque test connector thread failure; s5 fills the lower cavity of the tubing hanger and the lower cavity of the upper plug with test fluid through the following test lines: inlet of guide tube test line 217, inlet of annular auxiliary test line 216, inlet of lower auxiliary test line 215 of the production channel, inlet of production channel test line 214, and inlet of upper auxiliary test line 213 of the production channel, until the test fluid flows back from the outlet of the above lines. First, purge the air from the system as much as possible, then close the drain valve at the outlet of the above pipelines; s6. Close the drain valve of the plug test line 221 or close the plug test port on the simulated tree 200; s7. Apply pressure to the cavity through the following test lines: guide tube test line 217, annulus test line, lower auxiliary test line 215 of the production channel, production channel test line 214, and upper auxiliary test line 213 of the production channel. First, isolate and hold the pressure at 15,000 psi for 3 minutes, and record the results. S8 depressurize; S9 supply pressure to the cavity through the following test lines: guide tube test line 217, annulus test line, lower auxiliary test line 215 of the production channel, production channel test line 214, upper auxiliary test line 213 of the production channel, perform a second isolation and pressure holding, pressurize to 15000 psi, hold pressure for 15 min, and record the results; S10 depressurize each channel, confirm depressurization through the pressure gauge at the inlet end, confirm that each independent pressure gauge at the outlet end has depressurized, and confirm that the outlet end of each test line has been completed according to the above requirements.

[0097] Step 19: Pressure test of the bottom of the upper plug, the metal seal of the through channel, the metal seal of the production channel, and the annular auxiliary seal.

[0098] like Figure 19As shown, s1 drains all liquid from the lower cavity of the upper plug; s2 confirms that the test connector has been installed on the top of the simulated tree 200 and that the video monitoring system is in place; s3 opens the outlet of the upper channel auxiliary test line 211, the outlet of the upper production channel auxiliary test line 213, the outlet of the lower production channel auxiliary test line 215, and the test connector test line drain valve to monitor for leaks; s4 confirms that the plug test line 221 is closed; s5 installs the pneumatic test line to the following lines: production channel test line 214, annular auxiliary test line 216, crossing channel test line 212, and guide tube test line 217, while simultaneously closing the above... S6. Apply air pressure to the lower cavity of the upper plugger through the following pipeline inlets: production channel test line 214, annular auxiliary test line 216, crossing channel test line 212, and guide tube test line 217. Isolate and maintain pressure at 10,000 psi for 15 minutes. Monitor for leaks using a video surveillance system and record the results. S7. Depressurize by confirming with pressure gauges that all pipeline inlets and outlets have been depressurized. Confirm that the depressurization process has been completed in production channel test line 214, annular auxiliary test line 216, crossing channel test line 212, and guide tube test line 217. S8. Remove the upper plugger.

[0099] Step 20: Lower plug metal seal test

[0100] s1 Visually inspect the lower plug for damage, paying particular attention to the surface of the metal seal ring; s2 Remove the retaining ring from the lower plug; s3 Visually inspect to confirm that all shear pins have been removed from the plug and clean up any debris; s4 Remove the lower plug to simulate the metal seal ring, sealing pressure ring, and V-group seal ring; s5 Install and test the metal seal and sealing pressure ring; s6 Reinstall the retaining ring, ensuring it contacts the sealing pressure ring to secure the test metal seal ring; s7 Install the lower plug.

[0101] Step 21: Static pressure test of the metal seal of the lower plug

[0102] like Figure 21As shown, s1 fill the upper part of the plug at the lower part of the production hole of the tubing hanger with water until the liquid level reaches the groove on the inner diameter of the tubing hanger body; s2 install a camera system on the tubing hanger and confirm the operating status; s3 install a test connector to the top H4 profile of the simulated tree 200. This tool will act as an independent baffle when the tubing hanger locking structure fails; s4 open the drain valves at the outlet ends of the following pipelines to monitor for leaks: guide tube test pipeline 217, upper auxiliary test pipeline 213 of the production channel, lower auxiliary test pipeline 215 of the production channel, and crossing channel test pipeline 212. Open the drain valve of the plug test pipeline 221 to monitor for leaks; s 5. Install production channel test line 214 to simulated tree 200, and close the vent valve at the outlet end of production channel test line 214; s6. Apply pressure to the bottom chamber of the lower plug inside the tubing hanger through the inlet end of production channel test line 214, isolate and hold pressure for the first time, pressurize to 10,000 psi, hold pressure for 3 minutes, and record the results; s7. Depressurize; s8. Apply pressure to the bottom chamber of the lower plug inside the tubing hanger through the inlet end of production channel test line 214, isolate and hold pressure for the second time, pressurize to 10,000 psi, hold pressure for 15 minutes, and record the results; s9. Depressurize the pressure chamber and confirm that the pressure gauges at both the inlet and outlet ends have been depressurized.

[0103] Step 22: Pressure test of the lower plug metal seal and the production channel metal seal.

[0104] like Figure 22 As shown, confirm that the test connector has been installed on the simulated wellhead 200H4 profile and that the video monitoring system is operational; s2 drain the test fluid from the lower chamber of the lower plug; s3 open the outlet vent valves of the following test lines to monitor for leaks: guide tube test line 217, upper auxiliary test line 213 of the production channel, lower auxiliary test line 215 of the production channel, and through channel test line 212; open the vent valve of plug test line 221 to monitor for leaks; s4 install the air pressure test line to the production channel test line 214 and close the outlet vent valve of the production channel test line 214; s5 supply test air pressure to the lower chamber of the lower plug through the production channel test line 214, isolate and maintain the pressure at 10,000 psi for 15 minutes, visually monitor for leaks using the video monitoring system, and record the results; s6 depressurize the pressure chamber and confirm that the pressure gauges at both the inlet and outlet ends have been depressurized; s7 remove the lower plug.

[0105] Step 23: Metal Seal Test of Upper Blocker

[0106] S1 Visually inspect the upper plug for damage, paying particular attention to the surface of the metal seal ring; S2 Remove the retaining ring from the upper plug; S3 Visually inspect to confirm that all shear pins have been removed from the plug, and clean up any debris; S4 Remove the upper plug to simulate the metal seal ring, sealing pressure ring, and V-group seal ring; S5 Install and test the metal seal and sealing pressure ring, and record the results; S6 Reinstall the retaining ring, ensuring it contacts the sealing pressure ring to secure the tested metal seal ring; S7 Install the upper plug.

[0107] Step 24: Static pressure test of the upper plug metal seal and upper channel auxiliary seal.

[0108] 1. Fill the upper part of the plug at the production port of the tubing hanger with water until the liquid level reaches the groove on the inner diameter of the tubing hanger body; s2. Install the camera system on the tubing hanger and confirm the operating status; s3. Install the test connector to the top H4 profile of the simulated tree 200. This tool will act as an independent barrier when the tubing hanger locking structure fails; s4. Open the drain valves at the outlet ends of the following pipelines to monitor for leaks: guide tube test line 217, upper auxiliary test line 213 of the production channel, and lower auxiliary test line 215 of the production channel. Open the drain valves of the test connectors to monitor for leaks; s5. Close the drain valve of the plug test line 221; s6. Install the production channel test line 214, the crossing channel test line 212, and the upper channel auxiliary test line 215. 11. Connect to the simulated tree 200 and close the drain valve at the outlet of the above test lines; s7. Apply pressure to the bottom chamber of the upper plug in the tubing hanger through the inlet of the production channel test line 214, the crossing channel test line 212, and the upper channel auxiliary test line 211. Isolate and hold pressure for the first time, pressurize to 10,000 psi, hold pressure for 3 minutes, and record the results; s8. Depressurize; s9. Apply pressure to the bottom chamber of the upper plug in the tubing hanger through the inlet of the production channel test line 214, the crossing channel test line 212, and the upper channel auxiliary test line 211. Isolate and hold pressure for the second time, pressurize to 10,000 psi, hold pressure for 15 minutes, and record the results; s10. Depressurize the pressure chamber and confirm that the pressure gauges at both the inlet and outlet have been depressurized.

[0109] Step 25: Pressure test of the upper plug metal seal and upper channel auxiliary seal.

[0110] S1 Confirm that the test connector has been installed on the simulated wellhead 200H4 surface and the video monitoring system is available; S2 Drain the test fluid from the lower cavity of the upper plug; S3 Open the drain valves at the outlet of the following test lines to monitor for leaks: guide tube test line 217, upper auxiliary test line 213 of the production channel, and lower auxiliary test line 215 of the production channel; open the test connector drain valve to monitor for leaks; S4 Install the pneumatic test line to the production channel test line 214, the crossing channel test line 212, and the upper channel... S5. Close the drain valve at the outlet end of the auxiliary test line 211; S6. Provide test pressure to the lower cavity of the upper plug and the auxiliary seal of the through channel through the production channel test line 214, the through channel test line 212, and the upper channel auxiliary test line 211; Isolate and maintain pressure, pressurize to 10,000 psi and maintain pressure for 15 minutes; Visually monitor for leakage through the video monitoring system and record the results; S7. Depressurize the pressure chamber and confirm that the pressure gauges at the inlet and outlet ends have been depressurized; S8. Remove the upper plug.

[0111] Step 26: Post-Test Processing

[0112] s1 Remove tubing hanger from simulated tree 200; s2 Remove horizontal crossbar 219; s3 Remove tubing hanger; s4 Remove tubing hanger recovery tool; s5 Inspect tubing hanger; s6 Flush hydraulic channel 103.

[0113] Specifically, the upper channel test hole 210 must remain blocked throughout the entire test.

[0114] Specifically, for ease of understanding, the pressure-holding pipeline 4, auxiliary venting pipeline 5, test pressure 6, monitoring area 7, pressure balancing area 8, and flow area 9 are marked in the above-mentioned attached diagram.

[0115] Specifically, such as Figure 15 As shown, the steps for removing the lower blocker include the following steps: s1. Circulating test liquid is introduced into the inlet of the production channel test line 214 until continuous backflow can be seen at the outlet of the production channel test line 214 to confirm that there is no residual pressure in the bottom chamber of the lower blocker. The fluid circulation confirmation test needs to be independently observed and confirmed by two trained personnel; s2. The pressure in the production channel test line 214 is released to prevent hydraulic lock from being generated when the blocker is recovered.

[0116] like Figure 20As shown, the above-mentioned removal of the upper blocker includes the following steps: s1 By introducing circulating test liquid into the inlet of the production channel test line 214 until continuous backflow can be seen at the outlet of the blocker test line 221, it is confirmed that there is no residual pressure in the bottom chamber of the upper blocker. The fluid circulation confirmation test needs to be independently observed and confirmed by two trained personnel; s2 Release the pressure of the production channel test line 214 to prevent hydraulic lock from being generated when the blocker is recovered.

[0117] Compared to existing technologies, the method of this invention can systematically and comprehensively test the tubing hanger and its compatible accessories to ensure product quality. The entire process is highly systematic, effectively reducing repetitive work and improving testing efficiency. Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this invention and are not intended to limit it. Although the invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this invention without departing from the spirit and scope of the invention, and all such modifications and substitutions should be covered within the scope of the claims of this invention.

Claims

1. A method for testing tubing hangers, characterized in that, Includes the following steps: Step 1: Interface test between the tubing hanger and the simulated tree of production; Step 2: Underwater safety valve test; Step 3: Initial integrity verification of the locking mechanism and annular metal seal test; Step 4: Horizontal traversal interface testing; Step 5: Hydraulic body test; Step Six: Testing the interface of the wire mesh protective sleeve; Step 7: Interface test of the steel wire operation isolation sleeve, and hydraulic test of the metal seal between the isolation sleeve and the upper / lower part of the production channel; The interface test of the steel wire operation isolation sleeve and the hydraulic test of the metal seal between the isolation sleeve and the upper / lower part of the production channel include the following steps: First, conduct the wireline operation isolation sleeve interface test: s1 Inject test liquid into the production channel through the test pipeline on the simulated wellhead until the liquid level reaches the upper plug profile position; s2 Release the test pipeline on the simulated wellhead that horizontally crosses the plug and the production channel test pipeline, ensuring that the pipeline outlet position is higher than the liquid level to prevent test liquid from flowing out; s3 Install the wireline operation isolation sleeve; s4 Install the tubing hanger retrieval tool to the tubing hanger and lock the tubing hanger to the simulated wellhead; Next, perform a hydraulic test inside the wire rope operation isolation sleeve: s1 Install the hydraulic test line of the production channel on the top test cap of the tubing hanger retrieval tool, and install a hydraulic hose to the hydraulic supply unit. The vent valve should be installed perpendicular to the pipeline to allow air to escape from the system; s2 Fill the tubing hanger retrieval tool and isolation sleeve with test fluid through the production channel line of the top test cap, purging as much air as possible from the system; s3 Release the liquid from the production channel test line and the guide cylinder test line to monitor for leaks; s4 Provide hydraulic test pressure to the isolation sleeve through the production channel test line of the top test cap, perform a first isolation and pressure hold, pressurize to 10,000 psi, hold for 3 minutes, and record the results; s5 Depressurize; s6 Provide hydraulic test pressure to the isolation sleeve through the production channel test line of the top test cap, perform a second isolation and pressure hold, pressurize to 10,000 psi, hold for 15 minutes, and record the results; s7 Depressurize, confirm with a pressure gauge that the pressure has been completely released, and confirm that all the above steps are completed; Next, perform external hydraulic tests on the wire rope operation isolation sleeve and metal seal tests on the upper / lower parts of the production channel: s1 Install the plug hydraulic test line on the simulated tree; s2 Open the production channel vent valve on the test cap at the top of the tubing hanger recovery tool, and simultaneously close the vent valves at the inlet and outlet ends of the production channel test line; Open the drain valves at the outlets of the following pipelines to monitor for leaks: the through-channel test pipeline, the upper auxiliary test pipeline of the production channel, and the lower auxiliary test pipeline of the production channel; s3. Provide external hydraulic test pressure to the wireline work isolation sleeve through the production channel test pipeline, isolate and hold pressure for the first time, pressurize to 10,000 psi, hold pressure for 3 minutes, and record the results; s4. Depressurize; s5. Provide external hydraulic test pressure to the wireline work isolation sleeve through the production channel test pipeline, isolate and hold pressure for the second time, pressurize to 10,000 psi, hold pressure for 15 minutes, and record the results; s6. Depressurize, confirm with a pressure gauge that the pressure has been completely released, and confirm that all the above steps have been completed; s7. Remove the tubing hanger recovery tool from the tubing hanger; s8. Recover the wireline work isolation sleeve.

2. The method for testing a tubing hanger as described in claim 1, characterized in that, The interface test between the tubing hanger and the simulated tree of production includes the following steps: First, prepare the simulated wellhead: s1. Adapt and install the horizontal crossover device to the simulated wellhead; s2. Remove the plugs from the following test holes of the simulated wellhead: upper channel auxiliary test hole, crossover channel test hole, upper auxiliary test hole of the production channel, production channel test hole, lower auxiliary test hole of the production channel, annulus auxiliary test hole, and guide tube test hole; s3. Connect the liquid outlet pipeline; s4. Install the dust cap of the simulated wellhead to the top of the simulated wellhead; Next, perform interface testing between the tubing hanger and the simulated tree of production: s1 lower the tubing hanger to the simulated tree of production; s2 remove the tubing hanger retrieval tool from the tubing hanger; s3 press the tubing hanger into the tubing hanger using the tubing hanger installation tool; s4 reinstall the tubing hanger retrieval tool onto the tubing hanger and lock the tubing hanger to the simulated tree of production.

3. The method for testing a tubing hanger as described in claim 2, characterized in that, The underwater safety valve test includes the following steps: S1 Connect the hydraulic line to the underwater safety valve interface on the top test cap of the tubing hanger recovery tool and connect it to the hydraulic supply unit; S2 Initial pressure test, isolate and hold pressure; specifically, pressure 15000psi, hold pressure for 3 minutes, and record the results; S3 Depressurize; S4 Second pressure test, isolate and hold pressure, pressure 15000psi, hold pressure for 15 minutes, and record the results; S5 Depressurize.

4. The method for testing a tubing hanger as described in claim 3, characterized in that, The initial integrity verification and annular metal seal test of the locking mechanism include the following steps: S1 Remove the tubing hanger retrieval tool from the tubing hanger; S2 Remove the simulated Christmas tree protective cap and set it aside for later use; S3 Install the tubing hanger installation tool onto the H4 profile of the simulated Christmas tree. This tool will serve as an independent shield in case the tubing hanger locking mechanism fails; S4 Close the liquid outlet of the guide tube test line on the simulated Christmas tree; S4 Open the pressure relief valves at the liquid outlets of the simulated Christmas tree production channel test line, crossing channel test line, and annulus auxiliary test line to monitor for leaks; S5 Provide static pressure to the bottom of the tubing hanger through the liquid inlet of the simulated Christmas tree guide tube test line for initial isolation and protection. S6. Pressure is applied at 10,000 psi for 3 minutes, and the results are recorded; S7. Pressure is released at the bottom of the tubing hanger; S8. Static pressure is applied to the bottom of the tubing hanger through the inlet end of the test line of the simulated tree guide tube, and the pressure is held for a second time at 10,000 psi for 15 minutes, and the results are recorded; S9. Pressure is released at the bottom of the tubing hanger, and the pressure is confirmed by the pressure gauge to be released completely in both the initial and auxiliary pressure relief lines; S10. The tubing hanger installation tool is released from the tubing hanger and removed; S11. The protective cap is reinstalled to protect the simulated tree profile.

5. The method for testing a tubing hanger as described in claim 4, characterized in that, The horizontal traversal interface test includes the following steps: s1 Confirm that the horizontal crossing device has been adapted to the simulated oil production tree horizontal crossing interface location, and confirm that the horizontal crossing device configuration matches the tubing hanger; s2 Release all horizontal crossing pipelines; s3 Verify the crossing rod and record the results.

6. The method for testing a tubing hanger as described in claim 5, characterized in that, The hydraulic body test includes the following steps: S1. Install the tubing hanger retrieval tool onto the tubing hanger and lock the tubing hanger; S2. Use the test cap end of the top of the tubing hanger retrieval tool to put the production channel pipeline of the tubing hanger in a venting state; ensure the valve is open and the pipeline vents to the corresponding hydraulic oil recovery tank; S3. Close the following outlet pipelines on the simulated tree of production: production channel test pipeline, upper auxiliary test pipeline of the production channel, lower auxiliary test pipeline of the production channel, and guide tube test pipeline; S4. Install the following inlet test pipelines on the simulated tree of production: production channel test pipeline, production channel test pipeline, and guide tube test pipeline. The upper auxiliary test line and the lower auxiliary test line of the production channel are used to fill the production channel with test fluid until liquid is observed at the production port of the test cap on the top of the tubing hanger recovery tool. After removing as much air as possible from the system, the production port of the test cap on the top of the tubing hanger recovery tool is blocked. At s5, the test lines at the outlet ends of the simulated tree trunk are opened: the through-channel test line and the annular auxiliary test line, used to monitor for leaks. At s6, the pressure is increased to 2 / 3 of the test pressure through the production channel test line, the upper auxiliary test line of the production channel, and the lower auxiliary test line of the production channel. S7. Apply hydraulic pressure to the production channel of the tubing hanger, isolate and hold pressure until the pressure stabilizes; S8. Apply hydraulic pressure to the lower part of the tubing hanger through the simulated tree trunk test line, isolate and hold pressure until the pressure stabilizes; S9. Depressurize the production channel through the production channel test line, the upper auxiliary test line of the production channel, and the lower auxiliary test line of the production channel to complete the test pressure to the production channel of the tubing hanger, isolate and hold pressure for the first time, pressurize to 15000 psi, hold pressure for 3 minutes, and record the results; S10. Depressurize the production channel; S11. Apply hydraulic pressure to the production channel test line, and the production channel... The upper auxiliary test pipeline and the lower auxiliary test pipeline of the production channel are pressurized to the production channel of the tubing hanger. The pressure is then isolated and held for a second time at 15,000 psi for 15 minutes, and the results are recorded. The S11 production channel is depressurized, and it is confirmed that the pressure gauges at both the inlet and outlet ends have been depressurized. Liquid flow must be confirmed to be passing through the outlet ends of the production channel test pipeline, the upper auxiliary test pipeline of the production channel, and the lower auxiliary test pipeline of the production channel. The bottom balance pressure of the S12 tubing hanger is depressurized, and it is confirmed that the pressure gauges at both the inlet and outlet ends have been depressurized.

7. The method for testing a tubing hanger as described in claim 1, characterized in that, The interface test for the wire mesh protective sleeve includes the following steps: S1 Remove the tubing hanger recovery tool; S2 Install and recover the wireline work protective sleeve and observe.

8. A method for testing a tubing hanger as described in any one of claims 1 to 7, characterized in that, The following steps are included before conducting the interface test between the tubing hanger and the simulated tree: Step a: Static pressure test of the hydraulic pipeline body; Step b: Pressure and temperature crossing pipeline test; Step c: Test the interface between the tubing hanger retrieval tool and the tubing hanger.

9. A method for testing a tubing hanger as described in any one of claims 1 to 7, characterized in that, After conducting interface tests on the wire mesh isolation sleeve and hydraulic tests on the metal seals between the isolation sleeve and the upper / lower parts of the production channel, the following steps are also included: Step 8: Installation and testing of the lower blocker; Step Nine: Static pressure seal test at the top of the lower plug; Step 10: Static pressure seal test at the bottom of the lower plug and locking test of the lower plug; Step 11: Pressure sealing test of lower plug, annular metal seal, and upper / lower auxiliary seals in the production channel; Step 12: Installation and testing of the upper blocker; Step Thirteen: Static pressure seal test at the top of the upper plug; Step Fourteen: Static pressure test of the metal seal of the passageway, the upper auxiliary seal of the production passageway, and the annular auxiliary seal; Step 15: Upper plug locking test, tubing hanger locking test, and upper plug bottom static pressure test; Step Sixteen: Pressure test of the bottom of the upper plug, the metal seal of the through channel, the metal seal of the production channel, and the annular auxiliary seal; Step 17: Metal seal test of the lower plug; Step 18: Static pressure test of the metal seal of the lower plug; Step 19: Pressure test of the lower plug metal seal and the production channel metal seal; Step 20: Metal seal test of the upper plug; Step 21: Static pressure test of the upper plug metal seal and upper channel auxiliary seal; Step 22: Pressure test of the upper blocker metal seal and upper channel auxiliary seal; Step 23: Processing after testing.

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