CN106593332A - Installation and recovery device of underwater vertical Christmas tree tubing hanger - Google Patents

Abstract

The invention provides an installation and recovery device of an underwater vertical Christmas tree tubing hanger. The installation and recovery device of the underwater vertical Christmas tree tubing hanger comprises an installation and recovery device body, a plurality of clamping claws and a driving sleeve, wherein the multiple clamping claws are arranged in the circumferential direction of the installation and recovery device body, and one end of each clamping claw can swing relative to the installation and recovery device body; and the driving sleeve is arranged outside the installation and recovery device body in a sleeving mode and can move in the axial direction of the installation and recovery device body, and an annular protrusion is arranged on the inner wall of the driving sleeve, abuts against the clamping claws and can drive the clamping claws to swing. The installation and recovery device of the underwater vertical Christmas tree tubing hanger has the beneficial effects that by arranging the clamping claws, the driving sleeve and the tubing hanger can be locked, and the tubing hanger can be conveniently put down through the installation and recovery device of the underwater vertical Christmas tree tubing hange; and when the tubing hanger is put down to a set position, the driving sleeve moves upwards, and the clamping claws and the tubing hanger are unlocked.

Description

Installation and recovery device of tubing hanger for vertical subsea Christmas tree

technical field

The invention relates to the field of offshore oil equipment, in particular to an installation and recovery device for an underwater vertical Christmas tree tubing hanger.

Background technique

In offshore oil and gas production, the subsea vertical Christmas tree is an important part of the subsea production system. The tubing hanger is a device that supports the tubing string and seals the annular space between the tubing and the casing, and is a key component in the vertical tree system. At the same time, it also plays the role of hanging the weight of the oil pipe and providing oil flow channels. It is very important to install the tubing hanger safely.

The current vertical Christmas tree tubing hanger is equipped with a recovery device, which is mostly composed of two hydraulic systems and two drive sleeves. They are respectively used for locking and unlocking of the tubing hanger and installation device, and for driving the locking and unlocking of the tubing hanger and the wellhead. This makes the operation and structure of the installation recovery device complicated, and the installation time is long, the risk is high, and the reliability is low.

Contents of the invention

The invention provides an installation and recovery device of an underwater vertical oil pipe hanger for an underwater oil production tree, which simplifies the structure of the installation and recovery device and saves installation time.

The technical solution adopted by the present invention to solve the technical problem is: a device for installing and recovering an underwater vertical oil tubing hanger of an underwater oil tree. The device for installing and recovering an underwater vertical oil tree oil tube hanger includes: There are multiple claws, which are arranged along the circumference of the installation recovery device body. One end of the claw can swing relative to the installation recovery device body; the drive sleeve is set outside the installation recovery device body, and the drive sleeve can be installed along the installation recovery device body. The inner wall of the driving sleeve is provided with an annular projection, which abuts against the claw and can drive the claw to swing.

Further, the body of the installation and recovery device is provided with an annular limit engagement protrusion, one end of the claw is arranged below the annular limit engagement protrusion and can be engaged with the tubing hanger, and the other end of the claw is connected to the ring limit engagement protrusion. The upper part of the clamping protrusion is clamped, the middle part of the claw is against the outer surface of the annular limit clamping protrusion, and both ends of the claw can swing relative to the middle part of the claw.

Further, the cross-sectional shape of the side surface of the claw facing the annular protrusion is an outer concave shape with both ends raised and the middle part sunken. The height of the annular protrusion along the axial direction of the installation recovery device body is a, and the claw is recovered along the installation The axial height of the device body is b, where a is smaller than b.

Further, one end of the claw can be clamped with the tubing hanger, and the other end of the claw is hinged and fixed on the body of the installation and recovery device. The installation and recovery device of the underwater vertical oil tree tubing hanger also includes a return spring, and the return spring One end is fixed to the main body of the installation recovery device, and the other end of the return spring is fixed to one end of the claw.

Further, an annular piston part is fixedly arranged on the inner wall of the driving sleeve, and the inner wall of the annular piston part is in sealing connection with the outer wall of the recovery device body, and a first liquid injection space for driving the annular piston part downward is provided above the annular piston part. A second liquid injection space for driving the annular piston part upward is provided below the annular piston part.

Further, there is a certain distance between the annular piston part and the upper end of the driving sleeve, and the upper part of the driving sleeve, the upper end surface of the annular piston part and part of the outer wall where the recovery device body is installed together form a first liquid injection space.

Further, the outer wall of the installation recovery device body is provided with an annular limiting assembly, the annular limiting assembly is located below the annular piston part, and the outer wall of the annular limiting assembly is in sealing connection with the inner wall of the driving sleeve.

Furthermore, a part of the inner wall of the driving sleeve, a lower end surface of the annular piston part, a part of the outer wall where the body of the recovery device is installed, and an upper end surface of the annular limiting assembly jointly form the second liquid injection space.

Further, the annular limit assembly includes a stop ring fixed on the outer wall of the installation recovery device body, and the outer wall of the stop ring is sealingly connected with the inner wall of the drive sleeve.

Further, the tubing hanger is provided with an upper groove and a lower groove, one end of the claw can be engaged with the upper groove, and a C-shaped ring is arranged in the lower groove, and the claw and the upper groove are in a state of engagement , the lower end of the drive sleeve can press the C-shaped ring into the lower groove.

Further, the installation recovery device body includes a first inner sleeve and a fixed sleeve, the fixed sleeve is arranged on the upper end of the first inner sleeve, and the driving sleeve is arranged outside the first inner sleeve and the fixed sleeve.

The beneficial effect of the present invention is that, by setting the claws, the driving sleeve and the tubing hanger can be locked, so that the tubing hanger can be lowered through the installation and recovery device of the underwater vertical Christmas tree tubing hanger, and then lowered to the setting position, the drive sleeve moves up to unlock the jaws and the tubing hanger.

Description of drawings

The accompanying drawings constituting a part of the present application are used to provide a further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention. In the attached picture:

Fig. 1 is the structure schematic diagram of the installation recovery device embodiment of underwater vertical Christmas tree tubing hanger of the present invention;

Fig. 2 is a structural schematic diagram of the tubing hanger in the unlocked position of the installation and recovery device of the underwater vertical Christmas tree tubing hanger of the present invention;

Fig. 3 is an enlarged view of part A in Fig. 2;

Fig. 4 is an enlarged view of part B in Fig. 2;

Fig. 5 is a structural schematic diagram of the installation and recovery device of the underwater vertical Christmas tree tubing hanger and the tubing hanger in the locking position of the present invention;

Fig. 6 is an enlarged view of part C in Fig. 5;

Fig. 7 is an enlarged view of part D in Fig. 5;

Fig. 8 is a top view structure schematic diagram of the installation recovery device and the tubing hanger of the underwater vertical Christmas tree tubing hanger of the present invention;

Fig. 9 is a structural schematic diagram of another embodiment of the installation and recovery device of the underwater vertical Christmas tree tubing hanger of the present invention, in which the claws are in the locked position;

Fig. 10 is a structural schematic diagram of another embodiment of the installation and recovery device of the underwater vertical tree tubing hanger of the present invention, where the claw is in the unlocked position.

Reference signs in the figure: 12, claw; 13, C-ring; 131, inclined surface; 132, clamping plane; 14, upper groove; 15, lower groove; 16, tubing hanger outer sleeve; 17 , the second inner sleeve; 21, the first inner sleeve; 22, the fixed sleeve; 30, the drive sleeve; 31, the annular protrusion; 32, the annular piston part; 33, the first liquid injection space; 34, the second Liquid injection space; 42, stop ring; 51, return spring.

detailed description

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

As shown in Figures 1 to 8, an embodiment of the present invention provides an installation and recovery device for an underwater vertical Christmas tree tubing hanger. The installation and recovery device for an underwater vertical oil Christmas tree tubing hanger includes an installation and recovery device body, Jaw 12 and drive sleeve 30. There are a plurality of claws 12, which are arranged along the circumferential direction of the installation and recovery device body, and one end of the claws 12 can swing relative to the installation and recovery device body. The drive sleeve 30 is sleeved outside the installation recovery device body, and the drive sleeve 30 can move along the axial direction of the installation recovery device body. The inner wall of the drive sleeve 30 is provided with an annular protrusion 31, which abuts against the claw 12 and The claw 12 can be driven to swing.

By setting the claw 12, the driving sleeve 30 can be locked with the tubing hanger, so that the tubing hanger can be lowered through the installation and recovery device of the underwater vertical tree tubing hanger. When lowered to the set position, the driving sleeve 30 30 moves up, and claw 12 is unlocked with tubing hanger. In the embodiment of the present invention, the above-mentioned claws 12 are twelve, and are evenly spaced along the circumferential direction of the body of the installation and recovery device.

In the embodiment of the present invention, the body of the installation and recovery device is provided with a ring-shaped limit engagement protrusion, and one end of the claw 12 is arranged below the ring-shaped limit engagement protrusion and can be engaged with the tubing hanger. The other end is engaged with the upper part of the annular limit snap-fitting protrusion, and the middle part of the claw 12 abuts against the outer surface of the annular limit snap-fit protrusion, and both ends of the claw 12 can swing relative to the middle part of the snap claw 12 .

As shown in Figure 2, the shape of the side surface of the above-mentioned claw 12 facing the annular protrusion 31 is an outer concave shape (such as a V shape) with the upper and lower ends upturned and the middle part sunken. 2. The horizontal direction extends away from the main body of the installation recovery device. The middle part of the claw 12 abuts against the annular limit engagement protrusion and can rotate on the annular limit engagement protrusion as a hinge point. The above-mentioned annular protrusion 31 corresponds to the depression in the middle of the claw 12 . That is, when one end of the claw 12 is pressed down, the other end of the claw 12 is lifted, and when the other end of the claw 12 is pressed down, one end of the claw 12 is lifted. The height of the above-mentioned annular projection 31 along the axial direction of the installation recovery device body is a (that is, the height marked in Figure 3), and the height of the above-mentioned claw 12 along the axial direction of the installation recovery device body is b (marked height in Figure 3), where a It is less than b, that is, when the annular protrusion 31 moves axially along the body of the installation recovery device, the annular protrusion 31 can make one end of the claw 12 press down toward the direction of the body of the installation recovery device and make the other end of the claw 12 face away from the installation The direction of the recovery device body is tilted to ensure that both ends of the claw 12 can swing relative to the middle of the claw 12 . It should be noted that b is greater than or equal to 2a.

Certainly, the present invention is not limited to the above-mentioned embodiment. As shown in FIG. 9 and FIG. On the installation recovery device body, the installation recovery device of the underwater vertical oil tree tubing hanger also includes a return spring 51, one end of the return spring 51 is fixed to the installation recovery device body, and the other end of the return spring 51 is fixed to the claw 12. Wherein, in the embodiment of the present invention, the other end of the return spring 51 is fixedly connected to the inner surface of the claw 12 .

When the driving sleeve 30 moves downwards in the vertical direction, the annular protrusion 31 of the driving sleeve 30 squeezes the claw 12 towards the direction of the installation and recovery device body, and compresses the return spring 51. At this time, the claw 12 can be aligned with the corresponding oil pipe. The hanger is clamped and fixed. When the driving sleeve 30 moves upwards in the vertical direction, the annular protrusion 31 of the driving sleeve 30 disengages from the claw 12 , and under the elastic force of the return spring 51 , the claw 12 resets to unlock the claw 12 and the tubing hanger.

It should be noted that the above tubing hanger includes a second inner sleeve 17 and an outer tubing hanger sleeve 16 sleeved outside the second inner sleeve 17 . Wherein, the tubing hanger outer sleeve 16 is sheathed and fixed on the upper end of the second inner sleeve 17 , and a part of the tubing hanger outer sleeve 16 is placed above the upper end of the second inner sleeve 17 , as shown in FIG. 2 . On the outer sleeve 16 of the tubing hanger, an upper groove 14 and a lower groove 15 are arranged in parallel and spaced along the axial direction (the vertical direction in FIG. 2 is parallel to the axial direction of the outer sleeve 16 of the tubing hanger). 14 is engaged with one end of the jaw 12 , and a C-shaped ring 13 is arranged in the lower groove 15 .

Specifically, the side of the C-shaped ring 13 facing the drive sleeve 30 has an inclined surface 131 extending in the vertical direction and inclined to the outside. The clamping plane 132, the lower surface of the C-ring 13 is a horizontal plane. Since the C-ring 13 has certain elasticity, the lower end of the driving sleeve 30 can cooperate with the inclined surface and press the C-ring 13 into the lower groove 15 .

Specifically, when the C-shaped ring 13 is in a normal state, both the inclined surface 131 and the engagement plane 132 are located outside the lower groove 15. When the driving ring 30 moves downward in the vertical direction, the lower end of the driving ring 30 cooperates with the inclined surface 131. , make the C-shaped ring 13 shrink into the lower groove 15, and make the outer wall of the above-mentioned C-shaped ring 13 be at least flush with the groove top of the lower groove 15, so as to ensure that the C-shaped ring 13 is completely unlocked. When the drive ring 30 moves upwards in the vertical direction, the lower end of the drive ring 30 is separated from the C-shaped ring 13, and the C-shaped ring 13 returns to its normal state under the action of its own elastic force, even if the inclined surface 131 and the clamping plane 132 are located in the concave groove 15 outside.

Wherein, in the embodiment of the present invention, there is a certain distance between the annular protrusion 31 and the lower end of the driving sleeve 30 , and this distance is adapted to the distance between the upper groove 14 and the lower groove 15 . That is, after the annular protrusion 31 presses the claw 12 into the upper groove 14 , the lower end of the driving sleeve 30 also presses the C-shaped ring 13 into the lower groove 15 .

The inner wall of the driving sleeve 30 in the embodiment of the present invention is fixedly provided with an annular piston part 32, the inner wall of the annular piston part 32 is in sealing connection with the outer wall of the installation recovery device body, and the top of the annular piston part 32 is provided with a ring-shaped piston part 32 for driving. In the downward first liquid injection space 33 , a second liquid injection space 34 for driving the annular piston portion 32 upward is provided below the annular piston portion 32 .

Set the first liquid injection space 33 and the second liquid injection space 34, by changing the size of the first liquid injection space 33 and the second liquid injection space 34, the annular piston part 32 is driven to drive the drive sleeve 30 to install the recovery device body as a whole The axis (vertical direction) moves up and down to realize locking and unlocking operations.

In the embodiment of the present invention, both the first liquid injection space 33 and the second liquid injection space 34 have an oil injection hole and an oil return hole. When oil is injected through the oil injection port of the first liquid injection space 33, The oil in the second liquid injection space is discharged through the oil return hole; when the oil is injected into the second liquid injection space 34 through the oil injection hole of the second liquid injection space 34, the oil in the first liquid injection space 33 passes through the second liquid injection space An oil return hole in the liquid injection space drains oil. Of course, according to needs, the oil injection hole and the oil return hole of the first liquid injection space 33 can use the same oil hole, and the oil injection hole and the oil return hole of the second liquid injection space 34 can use the same oil hole.

As shown in FIG. 1 , there is a certain distance between the annular piston part 32 and the upper end of the driving sleeve 30 , and the upper part of the driving sleeve 30 , the upper end surface of the annular piston part 32 and part of the outer wall where the recovery device body is installed together form a first liquid injection space 33 .

The installation and recovery device body in the embodiment of the present invention includes a first inner sleeve 21 and a fixed sleeve 22, the fixed sleeve 22 is arranged on the upper end of the first inner sleeve 21, and the driving sleeve 30 is sleeved on the first inner sleeve 21 And fixing sleeve 22 outside. The upper end of the driving sleeve 30 is sealingly connected with the lower end of the fixed sleeve 22 . The first liquid injection space 33 is jointly formed by the upper part of the driving sleeve 30 , the upper end surface of the annular piston part 32 , the upper part of the first inner sleeve 21 and the lower end of the fixed sleeve 22 .

It should be noted that the outer diameter of the first inner sleeve 21 is the same as that of the second inner sleeve 17 , and the outer diameter of the first inner sleeve 21 is smaller than the inner diameter of the outer sleeve 16 of the tubing hanger. The upper end of the above-mentioned fixing sleeve 22 is used for connecting a lowering tool, such as a drill pipe and the like.

Preferably, an annular limiting assembly is provided on the outer wall of the first inner sleeve 21 , the annular limiting assembly is located below the annular piston portion 32 , and the outer wall of the annular limiting assembly is in sealing connection with the inner wall of the driving sleeve 30 . An annular limit assembly is provided to limit the longitudinal movement distance of the drive sleeve 30 to ensure that the drive sleeve 30 will not fall out.

Specifically, the annular limit assembly includes a stop ring 42 fixed on the outer wall of the installation recovery device body, and the outer wall of the stop ring 42 is in sealing connection with the inner wall of the driving sleeve 30 . In the embodiment of the present invention, the above-mentioned stop ring 42 is an annular structure fixed on the outer wall of the body of the recovery device, and the fixing method of the stop ring 42 and the body of the recovery device can be screwed or welded.

As shown in FIG. 5 , a part of the inner wall of the driving sleeve 30 , a lower end surface of the annular piston part 32 , a part of the outer wall of the first inner sleeve 21 and an upper end surface of the annular limiting assembly jointly form a second liquid injection space 34 .

As shown in FIG. 8 , two parallel and spaced oil and gas delivery pipelines are provided on the first inner sleeve 21 , and the above oil and gas delivery pipelines are arranged in a vertical direction. The second inner sleeve 17 is correspondingly provided with two parallel and spaced oil and gas delivery pipes, and the oil and gas delivery pipes on the first inner sleeve 21 communicate with the oil and gas delivery pipes on the second inner sleeve 17 correspondingly.

Preferably, a positioning device may be provided at the corresponding position between the lower end of the first inner sleeve 21 and the upper end of the second inner sleeve 17 , so as to facilitate the docking installation of the lower end of the first inner sleeve 21 and the second inner sleeve 17 .

When using the installation and recovery device of the underwater vertical Christmas tree tubing hanger in the embodiment of the present invention to work,

As shown in Figures 2 to 4, the installation and recovery device of the underwater vertical oil tree tubing hanger and the oil pipe hanger are connected on the platform, and the hydraulic circuit in the installation and recovery device of the underwater vertical oil Christmas tree tubing hanger is opened, Inject hydraulic oil into the first liquid injection space 33, thereby driving the above-mentioned drive sleeve 30 to move downward, the lower end of the drive sleeve 30 moves to the C-shaped ring 13, and makes the C-shaped ring 13 shrink. At this time, the claw 12 is in the Under the action of the annular protrusion 31, it is clamped with the upper groove 14, so that the installation and recovery device of the underwater vertical tree tubing hanger and the tubing hanger are in a locked state.

As shown in Figures 5 to 7, after lowering the installation and recovery device of the subsea vertical Christmas tree tubing hanger together with the tubing hanger to the wellhead, unlock the installation and recovery device of the underwater vertical Christmas tree tubing hanger, the specific process As follows: open the hydraulic circuit in the installation and recovery device of the underwater vertical oil tree tubing hanger, so that the hydraulic oil enters the second liquid injection space 34, and the driving sleeve 30 moves upward under the hydraulic drive. At this time, the claw 12 of the tubing hanger is separated from the upper groove 14 and unlocked. The driving sleeve 30 continues to move upwards, and the lower end of the driving sleeve 30 is disengaged from the C-shaped ring 13 , so that the C-shaped ring 13 is disengaged from the lower groove 15 by its own elastic force. At this point, the installation recovery device of the underwater vertical tree tubing hanger and the unlocking of the tubing hanger are completed.

The process of connecting the tubing hanger to the wellhead: while the driving sleeve 30 is moving upwards, after the C-ring 13 on the tubing hanger is separated from the lower end of the driving sleeve 30, the C-ring 13 returns to a free state, and the C-ring 13 is on its own. Under the action of elastic force, it expands outwards into the groove (not shown in the figure) on the wellhead, and locks the tubing hanger to the wellhead.

The recovery process of the tubing hanger: after the installation and recovery device of the subsea vertical oil tree tubing hanger is lowered to contact with the tubing hanger, the hydraulic circuit in the installation and recovery device of the underwater vertical oil tree tubing hanger is opened, The hydraulic oil enters the first liquid injection space 33, and the driving sleeve 30 moves downward. When the lower end of the driving sleeve 30 contacts the C-shaped ring 13 of the tubing hanger, the above-mentioned C-shaped ring 13 shrinks inwardly under the axial force, completing Unlocking of tubing hanger and wellhead. At the same time, the claw 12 of the tubing hanger is engaged with the upper groove 14, and the installation recovery device of the underwater vertical tree tubing hanger and the locking of the tubing hanger are completed. At this time, the oil tubing hanger can be recovered by lifting up the installed recovery device of the underwater vertical tree tubing hanger.

From the above description, it can be seen that the above-mentioned embodiments of the present invention have achieved the following technical effects: the driving sleeve and the tubing hanger can be locked through the engagement of the annular groove and the claw, which is convenient to pass through the underwater vertical The installation and recovery device of the oil tubing hanger of the Christmas tree lowers the tubing hanger. When it is lowered to the set position, the driving sleeve moves up to unlock the claw and the tubing hanger.

The hydraulic circuit is reduced, the structure is simple; the operation is simple, and the two actions of the installation and recovery device of the tubing hanger and the underwater vertical tree tubing hanger and the locking of the tubing hanger and the wellhead can be completed at the same time, reducing the installation time And risk, improve the installation efficiency and ensure the reliability of the installation.

The above is only a specific embodiment of the present invention, and cannot limit the scope of the invention, so the replacement of its equivalent components, or the equivalent changes and modifications made according to the patent protection scope of the present invention, should still fall within the scope of this patent. category. In addition, the technical features and technical features, technical features and technical solutions, and technical solutions and technical solutions in the present invention can be used in free combination.

Claims (11)

1. a kind of installation retracting device of underwater vertical production tree boll-weevil hanger, it is characterised in that the underwater vertical recovers the oil The installation retracting device of tree boll-weevil hanger includes：

Retracting device body is installed；

Claw (12), claw (12) is multiple, and circumferentially disposed along the installation retracting device body, one end of claw (12) can Relative to the installation retracting device body oscillatory；

Actuating sleeve (30), is set in outside the installation retracting device body, and actuating sleeve (30) can be along the installation retracting device The axial movement of body, is provided with annular protrusion (31) on the inwall of actuating sleeve (30), annular protrusion (31) is supported with claw (12) By and can drive claw (12) swing.

2. the installation retracting device of underwater vertical production tree boll-weevil hanger according to claim 1, it is characterised in that institute State and annular stop clamping projection is provided with installation retracting device body, one end of the claw (12) is arranged on the annular limit The raised lower section of position clamping simultaneously can be with boll-weevil hanger clamping, the other end and the annular stop clamping of the claw (12) Convex upper portion clamping, the middle part of the claw (12) is with the outer surface of annular stop clamping projection against the claw (12) two ends can swing relative to the middle part of the claw (12).

3. the installation retracting device of underwater vertical production tree boll-weevil hanger according to claim 2, it is characterised in that card Pawl (12) in the face of a side surface of annular protrusion (31) be shaped as two ends tilt, the outer spill of medial recess, annular protrusion (31) along install retracting device body shaft to height be a, claw (12) along install retracting device body shaft to height be b, Wherein a is less than b.

4. the installation retracting device of underwater vertical production tree boll-weevil hanger according to claim 1, it is characterised in that institute Stating one end of claw (12) can be hingedly fixed in the installation with boll-weevil hanger clamping, the other end of the claw (12) On retracting device body, the installation retracting device of the underwater vertical production tree boll-weevil hanger also includes back-moving spring, described Back-moving spring one end is fixed with the installation retracting device body, and the back-moving spring other end is fixed with claw (12).

5. the installation retracting device of underwater vertical production tree boll-weevil hanger according to claim 1, it is characterised in that drive Annular piston portion (32) is fixedly installed on the inwall of dynamic set (30), the inwall of annular piston portion (32) reclaims dress with described installation The outer wall for putting body is tightly connected, be provided with above annular piston portion (32) for drive annular piston portion (32) descending One fluid injection space (33), is provided with the second fluid injection for driving annular piston portion (32) up below annular piston portion (32) Space (34).

6. the installation retracting device of underwater vertical production tree boll-weevil hanger according to claim 5, it is characterised in that ring The upper end of shape piston portion (32) and actuating sleeve (30) has a segment distance, the top of actuating sleeve (30), annular piston portion (32) The outer wall of upper surface and the installation retracting device body is collectively forming the first fluid injection space (33).

7. the installation retracting device of underwater vertical production tree boll-weevil hanger according to claim 5, it is characterised in that institute State and annular stop component is provided with the outer wall for installing retracting device body, the annular stop component is located at annular piston portion (32) lower section, the outer wall of the annular stop component is connected with the inner wall sealing of actuating sleeve (30).

8. the installation retracting device of underwater vertical production tree boll-weevil hanger according to claim 7, it is characterised in that drive The dynamic internal partial wall for covering (30), the lower surface of annular piston portion (32), the outer wall of the installation retracting device body and institute The upper surface for stating annular stop component is collectively forming the second fluid injection space (34).

9. the installation retracting device of underwater vertical production tree boll-weevil hanger according to claim 7, it is characterised in that institute State the locating snap ring (42) that annular stop component includes being fixed on the outer wall of the installation retracting device body, the locating snap ring (42) outer wall is connected with the inner wall sealing of actuating sleeve (30).

10. the installation retracting device of underwater vertical production tree boll-weevil hanger according to claim 1, on boll-weevil hanger Upper groove (14) and low groove (15) are provided with, one end of claw (12) can be interior with upper groove (14) clamping, low groove (15) Be provided with C-shaped ring (13), it is characterised in that in claw (12) with the upper groove (14) in clamped condition when, actuating sleeve (30) lower end can be by C-shaped ring (13) press-in low groove (15).

The installation retracting device of 11. underwater vertical production tree boll-weevil hangers according to claim 1, it is characterised in that The installation retracting device body includes the first inner sleeve (21) and fixes sleeve (22), and fixes sleeve (22) is arranged in first The upper end of sleeve (21), actuating sleeve (30) is set in the first inner sleeve (21) and fixes sleeve (22) outward.