Deepwater novel spring energy storage type tubing hanger recovery tool

Abstract

The invention relates to the field of subsea Christmas tree tubing hangers, and discloses a novel deepwater spring energy storage type tubing hanger recovery tool which comprises a THMRT mandrel, an inner inclined table, a locking ring and a groove, an upper spring shell is fixedly arranged in the THMRT mandrel, an upper spring body is fixedly arranged on the lower surface of the upper spring shell, and a lower spring body is fixedly arranged on the lower surface of the upper spring shell. A THMRT shell is installed on the outer wall of the THMRT mandrel, a lower spring is fixedly arranged in the THMRT shell, a pressing plate is installed in the THMRT shell, a bearing body is fixedly arranged below the pressing plate, a screw is installed in the THMRT shell, and a lower supporting ring is fixedly arranged at the bottom of the THMRT shell. Through mutual cooperation of all the components, compared with other recycling tools, the device has the advantages of being higher in integration, simpler to operate and more stable in function.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of underwater Christmas tree tubing hangers, in particular to a deepwater novel spring energy type tubing hanger recovery tool. BACKGROUND

[0002] The novel tubing hanger recovery tool is important equipment for recovering the tubing hanger of an underwater wellhead Christmas tree, and the novel tubing hanger recovery tool faces complex working conditions and harsh environmental conditions such as waves, sea currents, drilling ship drift and circulating internal pressure under water.

[0003] At present, the widely used recovery tool is a hydraulic recovery tool, the hydraulic recovery tool is used for clamping the tubing hangers to be recovered by claws, and the tubing hangers are recovered by adopting a hydraulic power driving mode; however, the operation process of recovery is complex, and if the hydraulic pipeline fails, it is difficult to handle in time, and the stability of recovery is poor. SUMMARY

[0004] In view of the defects in the prior art, the application provides a deepwater novel spring energy type tubing hanger recovery tool, which solves the problems of complex operation process of recovery, difficult timely handling if the hydraulic pipeline fails and poor stability of recovery.

[0005] To achieve the above object, the application is implemented by the following technical scheme: a deepwater novel spring energy type tubing hanger recovery tool, comprising a THMRT mandrel, an internal inclined table, a locking ring and a groove, an upper spring shell is fixedly arranged in the THMRT mandrel, an upper spring body is fixedly arranged on the lower surface of the upper spring shell, a THMRT shell is installed on the outer wall of the THMRT mandrel, a lower spring is fixedly arranged in the THMRT shell, a pressing plate is installed in the THMRT shell, a bearing body is fixedly arranged below the pressing plate, a screw is installed in the THMRT shell, a lower support ring is fixedly arranged at the bottom of the THMRT shell, a LOCK caliper is installed at the bottom of the THMRT shell, a LATCH caliper is arranged on the outer wall of the LOCK caliper, a sealing sleeve is fixedly arranged on the outer wall of the LATCH caliper, a threaded ring is fixedly arranged in the THMRT shell, an ACME rotating sleeve is fixedly arranged on one side of the THMRT shell close to the threaded ring, an excitation ring is installed on one side of the THMRT shell close to the ACME rotating sleeve, and a guide key is fixedly arranged above the excitation ring.

[0006] Preferably, the THMRT spindle, the upper spring shell, the THMRT shell, the bearing body, the sealing sleeve and the ACME rotating sleeve are all in a cylindrical structure, the THMRT spindle is narrow in the upper part and wide in the middle part, and the lower part is provided with a threaded hole, the upper spring shell and the THMRT shell are used to load springs, and the bottom of the sealing sleeve is a large round corner guide to facilitate the butt joint with the tubing hanger.

[0007] Preferably, the lower support ring, the LOCK caliper, the LATCH caliper, the threaded ring and the excitation ring are all in a ring structure, and the LOCK caliper and the LATCH caliper are main recovery parts.

[0008] Preferably, the LOCK caliper and the LATCH caliper are in a closed state in the initial state, the THMRT shell is provided with a hexagonal special screw, which is used to ensure that the guide key is installed on the THMRT spindle and provide an anti-torque when the THMRT spindle rotates.

[0009] Preferably, the bearing body is provided with a shear pin between the lower threaded rings, and the shear pin makes the LOCK caliper and the LATCH caliper act according to the required pressure.

[0010] Preferably, the upper spring body is fixedly arranged in the THMRT spindle, the lower surface of the upper spring shell is fixedly arranged on the upper surface of the THMRT shell, the bearing body is fixedly arranged in the THMRT shell, the sealing sleeve is arranged on the outer wall of the THMRT spindle, and the guide key is fixedly arranged in the THMRT shell.

[0011] Preferably, the outer wall of the THMRT shell is provided with a mounting block, a plurality of guide columns are slidably connected in the mounting block, a box body is fixedly connected to the outer wall of the guide column, a pressurizing assembly is arranged in the box body, and the pressurizing assembly comprises an air bag.

[0012] Preferably, the pressurizing assembly further comprises a sliding plate, the outer wall of the sliding plate is slidably connected in the box body, a fixed rod is slidably connected in the sliding plate, the outer wall of the fixed rod is fixedly connected in the box body, and the lower surface of the sliding plate is attached to the outer wall of the air bag.

[0013] Preferably, the outer wall of the box body is fixedly connected with a fixed column, a latch assembly is arranged in the fixed column, the latch assembly comprises a plurality of latch bodies, the outer wall of the latch body is slidably connected with an arc-shaped plate, and the lower surface of the arc-shaped plate is fixedly connected to the upper surface of the mounting block.

[0014] Preferably, the latch assembly further comprises a sleeve, an outer wall of the sleeve is slidingly connected in the inner portion of the fixed column, a lower surface of the sleeve is fixedly connected to the outer wall of the latch body, and the outer wall of the latch body is fixedly provided with an elastic member.

[0015] Working principle: after the new tubing hanger recovery tool is hoisted and completed, it is slowly lowered, further making the bottom of the THMRT shell contact the top surface of the tubing hanger setting ring, then continuously lowering to the lower support ring falling on the shoulder of the tubing hanger fixing nut and being combined with the top of the tubing hanger body, then the THMRT shell is rotated clockwise, the bottom protrusion of the THMRT shell is matched and connected with the groove of the tubing hanger setting sleeve, the relative fixation of the tool and the tubing hanger is maintained under the action force of the upper spring, further continuously rotating the THMRT spindle clockwise, the ACME rotating sleeve is synchronously rotated through the guide key, the excitation ring is driven to move downward due to the threaded connection between the excitation ring and the ACME rotating sleeve, at this time, the upper shear pin is sheared, the excitation ring is extruded after moving, the LOCK calipers and the LATCH calipers are pried open and locked on the tubing hanger setting ring and the internal inclined table respectively, the locking of the tool and the tubing hanger is realized, then the tool is lifted, at this time, the lower shear pin is sheared, the THMRT spindle drives the THMRT shell and the locked LOCK calipers to move upward, until the LOCK calipers are tightly attached to the internal inclined table of the tubing hanger setting ring, the tool is continuously lifted until the shoulder of the bearing body is connected with the shoulder of the driving sleeve, the LOCK calipers are engaged with the driving sleeve of the tubing hanger, after completing the 2.06-inch unlocking forward stroke, the tool is continuously lifted, at this time, the LOCK calipers take the tubing hanger setting sleeve out of the locking ring, further making the locking ring separate from the groove of the Christmas tree and shrink inward, thereby achieving the effect of unlocking and recovering between the tubing hanger and the Christmas tree.

[0016] The application provides a deepwater new spring storage type tubing hanger recovery tool. 1、The application realizes higher integration, simpler operation and more stable function compared with other recovery tools through the cooperation between the components.

[0017] 2、The LOCK calipers and the LATCH calipers are closed in the initial state, the tool is placed in the specified position of the tubing hanger, the excitation ring is actuated through threaded rotation, the LOCK calipers and the LATCH calipers are pried open and locked in the tubing hanger setting ring and the internal inclined table, thereby realizing the effect of rapid locking.

[0018] 3、The LOCK calipers and the LATCH calipers are actuated and reach their specified positions at the same time through the design of the excitation ring, thereby realizing the effect of more rapid use.

[0019] 4、The application drives the sliding plate to slide downwards in the inside of the box body by the water body pressure, further compresses the air bag arranged in the inside, and transports the gas generated by the compressed air bag to the THMRT shell through the external air guide pipe, then realizes the pressurization of the gas in the THMRT shell, and improves the firmness of each connecting part in the inside. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a three-dimensional structure schematic diagram of the application; Figure 2 It is a whole structure cross-sectional schematic diagram of the application; Figure 3 It is a shear pin local structure schematic diagram of the application; Figure 4 It is a locking ring local structure schematic diagram of the application; Figure 5 It is a hexagonal special screw local structure schematic diagram of the application; Figure 6 It is a THMRT mandrel local structure schematic diagram of the application; Figure 7 It is a guide column local structure schematic diagram of the application; Figure 8 It is a sleeve ring local structure schematic diagram of the application.

[0021] 1, THMRT mandrel; 2, upper spring shell; 3, upper spring body; 4, THMRT shell; 5, lower spring; 6, pressing plate; 7, bearing body; 8, screw; 9, lower support ring; 10, LOCK caliper; 11, LATCH caliper; 12, sealing sleeve; 13, threaded ring; 14, ACME rotating sleeve; 15, excitation ring; 16, guide key; 17, mounting block; 18, guide column; 19, box body; 20, pressurization assembly; 201, sliding plate; 202, fixed rod; 203, air bag; 21, fixed column; 22, bolt assembly; 221, bolt body; 222, elastic piece; 223, sleeve ring; 23, arc plate; 24, hexagonal special screw; 25, shear pin; 26, inner inclined table; 27, locking ring; 28, groove. DETAILED DESCRIPTION

[0022] The technical solutions of the application will be described clearly and completely below in combination with the drawings of the application. Obviously, the described embodiments are only some of the embodiments of the application, instead of all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work belong to the protection scope of the application.

[0023] Please refer to the drawings of the application Figure 1 - the drawings of the application Figure 5The embodiment of the present application provides a deepwater novel spring energy type tubing hanger recovery tool, which comprises a THMRT mandrel 1, an internal inclined table 26, a locking ring 27 and a groove 28, the inside of the THMRT mandrel 1 is fixedly provided with an upper spring shell 2, the lower surface of the upper spring shell 2 is fixedly provided with an upper spring body 3, the outer wall of the THMRT mandrel 1 is provided with a THMRT shell 4, the inside of the THMRT shell 4 is fixedly provided with a lower spring 5, the inside of the THMRT shell 4 is provided with a pressing plate 6, the lower part of the pressing plate 6 is fixedly provided with a bearing body 7, the inside of the THMRT shell 4 is provided with a screw 8, the bottom of the THMRT shell 4 is fixedly provided with a lower support ring 9, the bottom of the THMRT shell 4 is provided with a LOCK caliper 10, the outer wall of the LOCK caliper 10 is provided with a LATCH caliper 11, the outer wall of the LATCH caliper 11 is fixedly provided with a sealing sleeve 12, the inside of the THMRT shell 4 is fixedly provided with a threaded ring 13, the inside of the THMRT shell 4 is fixedly provided with an ACME rotating sleeve 14 on one side close to the threaded ring 13, the THMRT shell 4 is provided with an excitation ring 15 on one side close to the ACME rotating sleeve 14, and the upper part of the excitation ring 15 is fixedly provided with a guide key 16; the THMRT mandrel 1, the upper spring shell 2, the THMRT shell 4, the bearing body 7, the sealing sleeve 12 and the ACME rotating sleeve 14 are all in a cylindrical structure, the THMRT mandrel 1 is narrow in the upper part, large in the middle and narrow in the lower part, and the middle and lower parts are provided with threaded holes, the upper spring shell 2 and the THMRT shell 4 are used for loading springs, the bottom of the sealing sleeve 12 is a large circular angle guide, which is convenient for butt joint with a tubing hanger; the lower support ring 9, the LOCK caliper 10, the LATCH caliper 11, the threaded ring 13 and the excitation ring 15 are all in an annular structure, and the LOCK caliper 10 and the LATCH caliper 11 are main recovery parts; the LOCK caliper 10 and the LATCH caliper 11 are in a closed state in an initial state, the THMRT shell 4 is provided with a hexagonal special screw 24, which is used for ensuring that the guide key 16 is installed on the THMRT mandrel 1 and providing a counter torque when the THMRT mandrel 1 rotates; the bearing body 7 is provided with a shear pin 25 between the lower part and the threaded ring 13, the shear pin 25 makes the LOCK caliper 10 and the LATCH caliper 11 move according to the required pressure; the upper spring body 3 is fixedly arranged in the inside of the THMRT mandrel 1, the lower surface of the upper spring shell 2 is fixedly arranged on the upper surface of the THMRT shell 4, the bearing body 7 is fixedly arranged in the inside of the THMRT shell 4, the sealing sleeve 12 is arranged on the outer wall of the THMRT mandrel 1, and the guide key 16 is fixedly arranged in the inside of the THMRT shell 4.

[0024] Specifically, the bottom of the recovery tool is a large conical chamfer, which can provide rough alignment when connected with the tubing hanger. When the bottom of the THMRT shell 4 contacts the top surface of the tubing hanger setting ring, continue to lower it until the bottom of the lower support ring 9 is in contact with the top of the tubing hanger body, that is, it is in place. Then rotate the THMRT shell 4 clockwise, so that the THMRT shell 4 bottom protrusion cooperates with the tubing hanger setting ring top surface groove 28, and then continue to rotate the THMRT mandrel 1 clockwise, which drives the ACME rotating sleeve 14 to rotate synchronously through the guide key 16. Because the excitation ring 15 is threadedly connected with the ACME rotating sleeve 14, it drives the excitation ring 15 to move downward. In this process, the upper shear pin 25 is sheared off. After the excitation ring 15 moves a distance, it will squeeze the LOCK calipers 10 and the LATCH calipers 11, causing them to spread out and lock on the tubing hanger setting ring and the internal inclined table 26, respectively, achieving the locking of the tool and the tubing hanger. Then lift the tool upward, and the lower shear pin 25 is sheared off. At this time, the THMRT mandrel 1 drives the THMRT shell 4 and the locked LOCK calipers 10 to move upward until the LOCK calipers 10 are in close contact with the internal inclined table 26 of the tubing hanger setting ring. When the tool continues to move upward by 2.06 inches, the LOCK calipers 10 will lift the tubing hanger setting ring upward, further causing the locking ring 27 to separate from the recess 28 of the Christmas tree and contract inward, finally achieving the unlocking and recovery of the tubing hanger and the Christmas tree. Through the high integration of the function of the ACME rotating sleeve 14, it is not necessary to additionally set driving components and moving mechanisms, which simplifies the overall structure while ensuring the flexibility of the excitation ring 15 drive and the convenience of its own movement, thereby improving the convenience of tool operation.

[0025] Please refer to the attached drawings Figure 6 -attached drawings Figure 8The outer wall of the THMRT shell 4 is provided with a mounting block 17, a plurality of guide columns 18 are slidably connected in the mounting block 17, a box body 19 is fixedly connected to the outer wall of the guide column 18, a pressurizing assembly 20 is installed in the box body 19, the pressurizing assembly 20 comprises an air bag 203, the air bag 203 is connected to the inside of the THMRT shell 4 through an external air guide pipe; the pressurizing assembly 20 further comprises a sliding plate 201, the outer wall of the sliding plate 201 is slidably connected in the box body 19, a fixed rod 202 is slidably connected in the inside of the sliding plate 201, the outer wall of the fixed rod 202 is fixedly connected to the inside of the box body 19, and the lower surface of the sliding plate 201 is attached to the outer wall of the air bag 203; a fixed column 21 is fixedly connected to the outer wall of the box body 19, a bolt assembly 22 is installed in the inside of the fixed column 21, the bolt assembly 22 comprises a plurality of bolt bodies 221, an arc-shaped plate 23 is slidably connected to the outer wall of the bolt body 221, and the lower surface of the arc-shaped plate 23 is fixedly connected to the upper surface of the mounting block 17; the bolt assembly 22 further comprises a sleeve ring 223, the outer wall of the sleeve ring 223 is slidably connected in the inside of the fixed column 21, the lower surface of the sleeve ring 223 is fixedly connected to the outer wall of the bolt body 221, and the outer wall of the bolt body 221 is fixedly provided with an elastic member 222.

[0026] Specifically, a plurality of holes are formed in the arc-shaped plate 23, and the hole size is matched with the bolt body 221; the detachable mounting block 17 is installed on the outer wall of the THMRT shell 4, then the box body 19 is connected to the mounting block 17 through the guide column 18, after the box body 19 is slid downward in the mounting block 17 by a distance through the guide column 18, the bolt body 221 will be in contact with the arc-shaped plate 23, the special shape of the arc-shaped plate 23 will make the bolt body 221 move in the fixed column 21 and compress the elastic member 222 at the same time, then the box body 19 drives the fixed column 21 to continuously slide downward, when the fixed column 21 slides downward to the same horizontal line as the hole formed in the arc-shaped plate 23, at this time, the elastic member 222 releases its elastic force to reset the bolt body 221, further making it clamped into the arc-shaped plate 23, thereby fixing the box body 19 and the mounting block 17; when the device body is immersed in water, the water pressure will drive the sliding plate 201 to slide downward in the box body 19, further compressing the air bag 203 arranged in the box body 19, and the gas generated by the compressed air bag 203 is transported into the THMRT shell 4 through the external air guide pipe, thereby pressurizing the gas in the THMRT shell 4 and improving the firmness of the connection parts in the THMRT shell 4.

[0027] Work flow: First, install the mounting block 17 on the outer wall of the THMRT shell 4, then the box 19 is connected with the mounting block 17 through the guide column 18, when the box 19 slides down along the guide column 18, the latch body 221 will contact the arc plate 23, through the special shape of the arc plate 23, the latch body 221 will be centered in the fixed column 21 and compress the elastic element 222, then the box 19 drives the fixed column 21 to continue to slide down, when the fixed column 21 is aligned with the hole in the arc plate 23, the elastic element 222 releases its elastic force to make the latch body 221 clamped into the arc plate 23, thereby realizing the fixation of the box 19 and the mounting block 17, when the device is in water, the sliding plate 201 is driven to slide down in the box 19 by water pressure, further compressing the air bag 203, the gas in the air bag 203 is sent into the THMRT shell 4 through the conduit, thereby achieving the effect of pressurizing the gas in the internal cavity of the THMRT shell 4 to enhance the stability of the internal connections.

[0028] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and variations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of the present application being defined by the appended claims and their equivalents.

Claims

1. A novel deep-water spring-energy-storage tubing hanger recovery tool, comprising a THMRT mandrel (1), an internal inclined platform (26), a locking ring (27), and a groove (28), characterized in that: An upper spring housing (2) is fixedly installed inside the THMRT mandrel (1). An upper spring body (3) is fixedly installed on the lower surface of the upper spring housing (2). A THMRT housing (4) is installed on the outer wall of the THMRT mandrel (1). A lower spring (5) is fixedly installed inside the THMRT housing (4). A pressure plate (6) is installed inside the THMRT housing (4). A bearing body (7) is fixedly installed below the pressure plate (6). A screw (8) is installed inside the THMRT housing (4). A lower support ring (9) is fixedly installed at the bottom of the THMRT housing (4). A LOCK caliper (10) is installed at the bottom of the body (4). A LATCH caliper (11) is provided on the outer wall of the LOCK caliper (10). A sealing sleeve (12) is fixedly provided on the outer wall of the LATCH caliper (11). A threaded ring (13) is fixedly provided inside the THMRT housing (4). An ACME rotating sleeve (14) is fixedly provided inside the THMRT housing (4) on the side near the threaded ring (13). An excitation ring (15) is installed on the side of the THMRT housing (4) near the ACME rotating sleeve (14). A guide key (16) is fixedly provided directly above the excitation ring (15).

2. The deep-water novel spring-energy-storing tubing suspension recovery tool according to claim 1, characterized in that: The THMRT mandrel (1), upper spring housing (2), THMRT housing (4), bearing body (7), sealing sleeve (12), and ACME rotating sleeve (14) are all cylindrical structures. The THMRT mandrel (1) is narrow at the top, wide in the middle, and narrow at the bottom, with a threaded hole in the middle and lower part. The upper spring housing (2) and THMRT housing (4) are used to load the spring. The bottom of the sealing sleeve (12) has a large rounded corner guide, which facilitates docking with the oil pipe.

3. The deep-water novel spring-energy-storing tubing hanger recovery tool according to claim 1, characterized in that: The lower support ring (9), LOCK caliper (10), LATCH caliper (11), threaded ring (13), and excitation ring (15) are all annular structures, and LOCK caliper (10) and LATCH caliper (11) are the main recycling parts.

4. The deep-water novel spring-energy-storing tubing hanger recovery tool according to claim 1, characterized in that: The LOCK caliper (10) and LATCH caliper (11) are in a closed state in the initial state. The THMRT housing (4) is provided with a hexagonal special screw (24) to ensure that the guide key (16) is installed on the THMRT spindle (1) and to provide counter torque when the THMRT spindle (1) rotates.

5. The deep-water novel spring-energy-storage type tubing hanger recovery tool according to claim 1, characterized in that: A shearing pin (25) is provided between the threaded rings (13) at the lower part of the bearing body (7). The shearing pin (25) causes the LOCK caliper (10) and LATCH caliper (11) to operate according to the required pressure.

6. The deep-water novel spring-energy-storing tubing hanger recovery tool according to claim 1, characterized in that: The upper spring body (3) is fixedly installed inside the THMRT spindle (1), the lower surface of the upper spring housing (2) is fixedly installed on the upper surface of the THMRT housing (4), the bearing body (7) is fixedly installed inside the THMRT housing (4), the sealing sleeve (12) is installed on the outer wall of the THMRT spindle (1), and the guide key (16) is fixedly installed inside the THMRT housing (4).

7. The deep-water novel spring-energy-storing tubing hanger recovery tool according to claim 1, characterized in that: The outer wall of the THMRT housing (4) is provided with a mounting block (17), and a plurality of guide posts (18) are slidably connected inside the mounting block (17). A box (19) is fixedly connected to the outer wall of the guide posts (18). A pressurization assembly (20) is installed inside the box (19). The pressurization assembly (20) includes an airbag (203), and the airbag (203) is connected to the inside of the THMRT housing (4) through an external air duct.

8. The deep-water novel spring-energy-storing tubing hanger recovery tool according to claim 7, characterized in that: The pressurization assembly (20) also includes a sliding plate (201), the outer wall of which is slidably connected to the inside of the housing (19), a fixing rod (202) is slidably connected to the inside of the sliding plate (201), the outer wall of which is fixedly connected to the inside of the housing (19), and the lower surface of the sliding plate (201) is attached to the outer wall of the airbag (203).

9. The deep-water novel spring-energy-storing tubing hanger recovery tool according to claim 7, characterized in that: The outer wall of the housing (19) is fixedly connected to a fixing column (21), and a pin assembly (22) is installed inside the fixing column (21). The pin assembly (22) includes multiple pin bodies (221), and an arc plate (23) is slidably connected to the outer wall of the pin body (221). The lower surface of the arc plate (23) is fixedly connected to the upper surface of the mounting block (17).

10. A novel deep-water spring-energy-storage tubing hanger recovery tool according to claim 9, characterized in that: The pin assembly (22) also includes a collar (223), the outer wall of which is slidably connected to the inside of the fixing post (21), the lower surface of which is fixedly connected to the outer wall of the pin body (221), and an elastic element (222) is fixedly provided on the outer wall of the pin body (221).

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