Hydraulic delivering and taking tool for underwater oil pipe hanger

Abstract

The utility model discloses an underwater tubing hanger hydraulic delivery tool which comprises a hydraulic delivery tool body, an upper hydraulic cover and a lower hydraulic cover are arranged on the outer side of the hydraulic delivery tool body, and an upper hydraulic piston and a lower hydraulic piston are arranged on the outer side of the hydraulic delivery tool body. The lower portion of the upper hydraulic piston is located on the outer side of the lower hydraulic piston, a clamping jaw is arranged on the outer side of the lower hydraulic piston, a third pressing ring is arranged on the outer side of the lower portion of the upper hydraulic piston, and the clamping jaw and the lower portion of the upper hydraulic piston are fixed together through the third pressing ring. A first hydraulic hole and a second hydraulic hole are formed in the hydraulic feeding and taking tool body, the first hydraulic hole is in hydraulic communication with the upper hydraulic piston, and the second hydraulic hole is in hydraulic communication with the lower hydraulic piston. According to the hydraulic delivering and taking tool for the underwater oil pipe hanger, leakage points can be effectively reduced, and the stability and reliability of a hydraulic system are improved.

Description

Technical Field

[0001] The utility model relates to a hydraulic feeding and taking tool for an underwater oil pipe hanger, belonging to the technical field of oil and natural gas exploitation devices. Background Art

[0002] With the current development of underwater oil exploitation, the delivery and removal of the tubing hanger in the underwater wellhead equipment is different from the traditional threaded delivery and retrieval method of the land wellhead. It is necessary to take into account the complex underwater marine ecological environment and the installation process with an extreme lack of visual observation. A precise, remote and reliable tubing hanger delivery and retrieval tool is needed, which can adapt to the working conditions of underwater remote operation and precise guidance to ensure the correct installation position of the tubing hanger.

[0003] In the prior art, the installation of underwater tubing hangers generally adopts the form of hydraulic remote control, but it requires multiple hydraulic pistons for driving or multiple hydraulic chambers for energy storage. Such a design will increase many potential leakage points due to the use of multiple hydraulic combination strokes, which can easily cause the functional failure of the hydraulic system to block the wellhead, increase additional installation risks, and lack installation guidance. If the wellhead and the tubing hanger are both provided with side outlets, this design requires multiple adjustments to the side outlet position of the tubing hanger when the delivery tool is sent into the tubing hanger, resulting in increased labor costs and time costs, and there are many safety hazards. The previous design also lacked a mechanism design for determining the piston stroke, that is, verifying that the piston is in place. This design will not be able to verify whether the piston has moved into place in time after the hydraulic pressure is injected during installation, and whether there is leakage in the hydraulic chamber and other uncontrollable situations. Utility Model Content

[0004] The utility model aims to provide a hydraulic feeding and taking tool for an underwater tubing hanger. The hydraulic feeding and taking tool for an underwater tubing hanger adopts a double-piston drive, which can effectively reduce leakage points and improve the stability and reliability of the hydraulic system.

[0005] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide an underwater tubing hanger hydraulic delivery and retrieval tool, which includes a hydraulic delivery and retrieval tool body, an upper hydraulic cover and a lower hydraulic cover are arranged on the outer side of the hydraulic delivery and retrieval tool body, the upper hydraulic cover is located above the lower hydraulic cover, a first pressure ring is arranged on the upper inner side of the upper hydraulic cover, the first pressure ring is sleeved on the hydraulic delivery and retrieval tool body, the first pressure ring and the upper hydraulic cover are threadedly connected, a first annular groove is arranged on the hydraulic delivery and retrieval tool body, the first annular groove is coaxial with the hydraulic delivery and retrieval tool body, a first bearing ring is arranged in the first annular groove, the first bearing ring is fixed together with the first pressure ring and the upper hydraulic cover, a second pressure ring is arranged on the upper inner side of the lower hydraulic cover, the second pressure ring is sleeved on the hydraulic delivery and retrieval tool body, the second pressure ring and the lower hydraulic cover are threadedly connected, a second annular groove is arranged on the hydraulic delivery and retrieval tool body, the The second annular groove is coaxial with the hydraulic feeding and taking tool body, a second bearing ring is arranged in the second annular groove, the second bearing ring is fixed together with the second pressure ring and the lower hydraulic cover, an upper hydraulic piston and a lower hydraulic piston are arranged on the outside of the hydraulic feeding and taking tool body, the upper part of the upper hydraulic piston is located between the hydraulic feeding and taking tool body and the upper hydraulic cover, the lower part of the upper hydraulic piston is located on the outside of the lower hydraulic piston, a claw is arranged on the outside of the lower hydraulic piston, a third pressure ring is arranged on the lower outside of the upper hydraulic piston, the third pressure ring fixes the claw and the lower part of the upper hydraulic piston together, a C-ring is arranged on the lower outside of the hydraulic feeding and taking tool body, a tip is arranged at the lower end of the lower hydraulic piston, and the tip can be inserted into the inner side of the C-ring, a first hydraulic hole and a second hydraulic hole are arranged on the hydraulic feeding and taking tool body, the first hydraulic hole is hydraulically connected with the upper hydraulic piston, and the second hydraulic hole is hydraulically connected with the lower hydraulic piston.

[0006] Preferably, a threaded adapter is provided on the top of the hydraulic delivery and retrieval tool body.

[0007] Preferably, the middle portion of the upper hydraulic piston is located outside the second bearing ring, the second pressure ring and the lower hydraulic cover.

[0008] Preferably, the upper hydraulic cover is sealed with the lower hydraulic cover and the upper hydraulic piston.

[0009] Preferably, a first sealing ring is provided on the outer side of the lower end of the lower hydraulic piston.

[0010] Preferably, a second sealing ring is provided on the outer side of the lower part of the hydraulic delivery and retrieval tool body.

[0011] Preferably, a sealing sleeve is provided at the bottom of the hydraulic delivery and retrieval tool body.

[0012] Preferably, a guide sleeve is provided on the outer side of the upper portion of the upper hydraulic cover, the guide sleeve is fixed to the upper portion of the upper hydraulic cover by screws, the guide sleeve comprises a shell portion extending downward, the shell portion is located on the outer side of the upper hydraulic cover and the upper hydraulic piston.

[0013] Preferably, a first hydraulic verification hole and a second hydraulic verification hole are provided on the hydraulic delivery and retrieval tool body, the first hydraulic verification hole is hydraulically connected to the upper hydraulic piston, and the second hydraulic verification hole is hydraulically connected to the lower hydraulic piston.

[0014] The beneficial effects of the utility model are as follows: the hydraulic delivery and retrieval tool for the underwater tubing hanger of the utility model adopts a dual-piston drive of an upper hydraulic piston and a lower hydraulic piston, which can effectively reduce the leakage points of the hydraulic system, improve the stability and reliability of the hydraulic system, and enable accurate, simple, efficient, time-saving and labor-saving installation in an underwater installation environment out of sight, and can deliver and retrieve the underwater tubing hanger, and can remotely check the piston movement through hydraulic pressure, verify the piston position, and indirectly judge whether the C-ring is reliably locked. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0016] Figure 1 This is a structural schematic diagram of a hydraulic delivery and retrieval tool for an underwater tubing hanger of the utility model;

[0017] Figure 2 The utility model is a top view of a hydraulic feeding and taking tool of an underwater oil pipe hanger. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Embodiments of the utility model:

[0020] The utility model provides a hydraulic delivery and retrieval tool for an underwater tubing hanger. Figure 1 to Figure 2, including a hydraulic feeding and taking tool body 2, an upper hydraulic cover 6 and a lower hydraulic cover 9 are arranged on the outer side of the hydraulic feeding and taking tool body 2, the upper hydraulic cover 6 is located above the lower hydraulic cover 9, a first pressure ring 4 is arranged on the upper inner side of the upper hydraulic cover 6, the first pressure ring 4 is sleeved on the hydraulic feeding and taking tool body 2, the first pressure ring 4 and the upper hydraulic cover 6 are threadedly connected, a first annular groove 15 is arranged on the hydraulic feeding and taking tool body 2, the first annular groove 15 is coaxial with the hydraulic feeding and taking tool body 2, a first bearing ring 5 is arranged in the first annular groove 15, the first bearing ring 5 is fixed together with the first pressure ring 4 and the upper hydraulic cover 6, a second pressure ring 8 is arranged on the upper inner side of the lower hydraulic cover 9, the second pressure ring 8 is sleeved on the hydraulic feeding and taking tool body 2, the second pressure ring 8 and the lower hydraulic cover 9 are threadedly connected, a second annular groove 17 is arranged on the hydraulic feeding and taking tool body 2, the second annular groove 17 is coaxial with the hydraulic feeding and taking tool body 2, a second annular groove 17 is arranged in the second annular groove 17 There is a second load-bearing ring 10, which is fixed together with the second pressure ring 8 and the lower hydraulic cover 9. An upper hydraulic piston 7 and a lower hydraulic piston 20 are arranged on the outer side of the hydraulic feeding and taking tool body 2. The upper part of the upper hydraulic piston 7 is located between the hydraulic feeding and taking tool body 2 and the upper hydraulic cover 6. The lower part of the upper hydraulic piston 7 is located on the outer side of the lower hydraulic piston 20. A claw 12 is arranged on the outer side of the lower hydraulic piston 20. A third pressure ring 1 is arranged on the outer side of the lower part of the upper hydraulic piston 7. 1, the third pressure ring 11 fixes the claw 12 and the lower part of the upper hydraulic piston 7 together, a C-ring 14 is provided on the outer side of the lower part of the hydraulic feeding and taking tool body 2, and a tip portion 13 is provided at the lower end of the lower hydraulic piston 20, and the tip portion 13 can be inserted into the inner side of the C-ring 14, and a first hydraulic hole 21 and a second hydraulic hole 22 are provided on the hydraulic feeding and taking tool body 2, the first hydraulic hole 21 is hydraulically connected to the upper hydraulic piston 7, and the second hydraulic hole 22 is hydraulically connected to the lower hydraulic piston 20.

[0021] Preferably, a threaded adapter 1 is provided on the top of the hydraulic delivery and retrieval tool body 2, which can be connected to an underwater wellhead.

[0022] Preferably, the middle portion of the upper hydraulic piston 7 is located outside the second bearing ring 10 , the second pressure ring 8 and the lower hydraulic cover 9 .

[0023] Preferably, the upper hydraulic cover 6 is sealed with the lower hydraulic cover 9 and the upper hydraulic piston 7 to prevent leakage of the hydraulic system.

[0024] Preferably, a first sealing ring 19 is provided on the outer side of the lower end of the lower hydraulic piston 20, and a second sealing ring 18 is provided on the outer side of the lower part of the hydraulic delivery and retrieval tool body 2. The first sealing ring 19 and the second sealing ring 18 prevent hydraulic leakage at this location, and the first sealing ring 19 and the second sealing ring 18 are in contact with the sealing surface of the underwater oil pipe hanger.

[0025] Preferably, a sealing sleeve 16 is provided at the bottom of the hydraulic delivery and retrieval tool body 2 to prevent leakage from the bottom of the hydraulic delivery and retrieval tool body.

[0026] Preferably, a guide sleeve 3 is provided on the outer side of the upper part of the upper hydraulic cover 6, and the guide sleeve 3 is fixed to the upper part of the upper hydraulic cover 6 by screws, and the guide sleeve 3 includes a housing portion 23 extending downward, and the housing portion 23 is located on the outer side of the upper hydraulic cover 6 and the upper hydraulic piston 7. The guide sleeve 3 guides and limits the upper and lower hydraulic pistons 7 and 20, so that the upper and lower hydraulic pistons 7 and 20 can move stably.

[0027] Preferably, a first hydraulic verification hole 24 and a second hydraulic verification hole 25 are provided on the hydraulic delivery and retrieval tool body 2 , the first hydraulic verification hole 24 is hydraulically connected to the upper hydraulic piston 7 , and the second hydraulic verification hole 25 is hydraulically connected to the lower hydraulic piston 20 .

[0028] After the hydraulic oil is injected into the first hydraulic hole 21, the upper hydraulic piston 7 is controlled to move upward and downward. After the hydraulic oil is injected into the second hydraulic hole 22, the lower hydraulic piston 20 is controlled to move upward and downward. The lower hydraulic piston 20 moves downward, and the tip 13 can open the C-ring 14 downward. The C-ring 14 locks the hydraulic feeding and retrieval tool body 2 and the underwater tubing hanger together. The upper hydraulic piston 7 moves downward, driving the claw 12 to move downward. The claw 12 grabs the underwater tubing hanger. When the upper hydraulic piston 7 moves downward to the right position, low-pressure hydraulic pressure is injected into the first hydraulic verification hole 24. It is found that the pressure can be maintained at this time, and it is judged that the upper hydraulic piston 7 moves downward to the right position. When the lower hydraulic piston 20 moves downward, the first sealing ring 19 will follow the downward movement. The first sealing ring 19 contacts the sealing surface of the underwater tubing hanger to form a seal. At this time, hydraulic pressure is injected into the second hydraulic hole 22. It is found that the pressure can be maintained at this time, and it is judged that the lower hydraulic piston 20 moves downward to the right position, and the C-ring 14 is opened and locked.

[0029] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A hydraulic delivery and retrieval tool for an underwater tubing hanger, comprising a hydraulic delivery and retrieval tool body, characterized in that: An upper hydraulic cover and a lower hydraulic cover are arranged on the outer side of the hydraulic feeding and retrieval tool body, the upper hydraulic cover is located above the lower hydraulic cover, a first pressure ring is arranged on the upper inner side of the upper hydraulic cover, the first pressure ring is sleeved on the hydraulic feeding and retrieval tool body, the first pressure ring and the upper hydraulic cover are threadedly connected, a first annular groove is arranged on the hydraulic feeding and retrieval tool body, the first annular groove is coaxial with the hydraulic feeding and retrieval tool body, a first bearing ring is arranged in the first annular groove, the first bearing ring is fixed together with the first pressure ring and the upper hydraulic cover, a second pressure ring is arranged on the upper inner side of the lower hydraulic cover, the second pressure ring is sleeved on the hydraulic feeding and retrieval tool body, the second pressure ring is threadedly connected with the lower hydraulic cover, a second annular groove is arranged on the hydraulic feeding and retrieval tool body, the second annular groove is coaxial with the hydraulic feeding and retrieval tool body, a first bearing ring is arranged in the second annular groove A second load-bearing ring is arranged, and the second load-bearing ring is fixed together with the second pressure ring and the lower hydraulic cover. An upper hydraulic piston and a lower hydraulic piston are arranged on the outside of the hydraulic feeding and taking tool body. The upper part of the upper hydraulic piston is located between the hydraulic feeding and taking tool body and the upper hydraulic cover, and the lower part of the upper hydraulic piston is located on the outside of the lower hydraulic piston. A clamping claw is arranged on the outside of the lower hydraulic piston, and a third pressure ring is arranged on the lower outside of the upper hydraulic piston. The third pressure ring fixes the clamping claw and the lower part of the upper hydraulic piston together. A C-ring is arranged on the lower outside of the hydraulic feeding and taking tool body, and a tip portion is arranged at the lower end of the lower hydraulic piston, and the tip portion can be inserted into the inner side of the C-ring. A first hydraulic hole and a second hydraulic hole are arranged on the hydraulic feeding and taking tool body, and the first hydraulic hole is hydraulically connected with the upper hydraulic piston, and the second hydraulic hole is hydraulically connected with the lower hydraulic piston.

2. The underwater tubing hanger hydraulic delivery and retrieval tool according to claim 1, characterized in that: A threaded adapter is arranged on the top of the hydraulic feeding and taking tool body.

3. The hydraulic delivery and retrieval tool for underwater tubing hanger according to claim 2, characterized in that: The middle part of the upper hydraulic piston is located outside the second bearing ring, the second pressure ring and the lower hydraulic cover.

4. The hydraulic delivery and retrieval tool for underwater tubing hanger according to claim 3, characterized in that: The upper hydraulic cover is sealed with the lower hydraulic cover and the upper hydraulic piston.

5. The hydraulic delivery and retrieval tool for underwater tubing hanger according to claim 4, characterized in that: A first sealing ring is arranged on the outer side of the lower end of the lower hydraulic piston.

6. The hydraulic delivery and retrieval tool for underwater tubing hanger according to claim 5, characterized in that: A second sealing ring is arranged on the outer side of the lower part of the hydraulic feeding and taking tool body.

7. The hydraulic delivery and retrieval tool for underwater tubing hanger according to claim 5, characterized in that: A sealing sleeve is arranged at the bottom of the hydraulic feeding and taking tool body.

8. The underwater tubing hanger hydraulic delivery and retrieval tool according to claim 5, characterized in that: A guide sleeve is arranged on the outer side of the upper part of the upper hydraulic cover, and the guide sleeve is fixed to the upper part of the upper hydraulic cover by screws. The guide sleeve includes a shell part extending downward, and the shell part is located on the outer side of the upper hydraulic cover and the upper hydraulic piston.

9. The underwater tubing hanger hydraulic delivery and retrieval tool according to claim 1, characterized in that: The hydraulic delivery and retrieval tool body is provided with a first hydraulic verification hole and a second hydraulic verification hole, wherein the first hydraulic verification hole is hydraulically connected to the upper hydraulic piston, and the second hydraulic verification hole is hydraulically connected to the lower hydraulic piston.

Images