Mechanical underwater tubing hanger lifting tool

Abstract

The utility model relates to the technical field of oil and gas equipment, in particular to a mechanical underwater oil pipe hanger lifting tool which comprises a lifting piece, the lifting piece is arranged in a hanger in a sleeved mode, the outer portion of the lifting piece is fixedly connected with one end of a displacement driving assembly, and the other end of the displacement driving assembly is fixedly connected with a fixing piece. The fixing piece is fixedly connected with the exterior of the hanger; a fastening assembly is arranged outside the lifting piece in a relative movement mode, and the moving direction of the fastening assembly is coaxial with the hanger. The lifting part is sleeved with a clamping ring, a clamping groove is formed in the hanger, and when the fastening end of the fastening assembly is located above the clamping ring, the clamping ring does not make contact with the clamping groove in the hanger; when the fastening end of the fastening assembly is located between the clamping ring and the lifting piece, the clamping ring is matched with the clamping groove in the hanger in a clamped mode. The utility model aims to solve the technical problems of rapid lifting and installation of the underwater tubing hanger and safety detection.

Description

Technical Field

[0001] This utility model relates to the field of oil and gas equipment technology, and more specifically, to a mechanical underwater oil pipe hanger lifting tool. Background Technology

[0002] Subsea tubing hangers are a key component of subsea wellhead production trees. They are primarily used to suspend tubing, providing a pathway for oil and gas production, sealing the annular space between the tubing and the casing, and providing interfaces and channels for bottom-hole electrical, hydraulic, and chemical injection. In the oil and gas industry, before installing subsea tubing hangers, lifting tools are needed to move and install the tubing string, as well as for pre-positioning and pressure testing before installation. Therefore, subsea tubing hanger lifting tools are crucial equipment for the installation, retrieval, and transportation of tubing hangers during subsea oil and gas extraction.

[0003] Currently, common lifting tools such as eye bolts cannot reliably and securely lift, move, or pre-install underwater tubing hangers, which can easily lead to the risk of detachment and injury or loss to personnel and equipment. At the same time, it is difficult to conduct pre-installation sealing tests and pressure tests on the interior of the underwater tubing hanger to eliminate potential safety hazards. Utility Model Content

[0004] The purpose of this application is to provide a mechanical underwater tubing hanger lifting tool, which aims to solve the technical problems of rapid lifting and installation of underwater tubing hangers, as well as safety inspection.

[0005] To solve the above-mentioned technical problems, the solution adopted in this application is as follows:

[0006] A mechanical underwater tubing hanger lifting tool includes a lifting component, which is sleeved inside the hanger. One end of a displacement drive assembly is fixedly connected to the outside of the lifting component, and the other end of the displacement drive assembly is fixedly connected to a fixing component. The fixing component is fixedly connected to the outside of the hanger.

[0007] Preferably, the lifting member is provided with a fastening assembly for external relative movement, and the moving direction of the fastening assembly is coaxial with that of the hanger.

[0008] Preferably, the lifting member is externally fitted with a retaining ring, and the hanger is internally provided with a retaining groove. When the fastening end of the fastening component is above the retaining ring, the retaining ring does not contact the retaining groove inside the hanger; when the fastening end of the fastening component is between the retaining ring and the lifting member, the retaining ring engages with the retaining groove inside the hanger.

[0009] Preferably, a sealing ring is fixedly fitted at the bottom of the lifting member, and the outer ring of the sealing ring abuts against the inner wall of the hanger.

[0010] Preferably, the top of the lifting member is provided with a pneumatic valve, which is connected to the interior of the hanger through the lifting member and to an external air pump. A pneumatic pressure detector is provided on the pneumatic valve.

[0011] Preferably, the fastening assembly includes a threaded ring plate, the inner ring of which is threaded, and the threaded ring plate is sleeved on the outside of the lifting member and engages with the external threads of the lifting member.

[0012] Preferably, the displacement drive assembly includes a threaded sleeve with a threaded hole axially extending through it. Threaded rod one and threaded rod two are threadedly fitted onto the upper and lower ends of the threaded sleeve, respectively. Threaded rod one is mounted on a fastening assembly, and threaded rod two is mounted on a fixing assembly. The displacement direction of the threaded sleeve is consistent with the axial direction of the suspension.

[0013] Preferably, the thread helix directions of thread rod one and thread rod two are opposite.

[0014] Preferably, the fixing component is provided with threads on the outside, and the threads of the fixing component pass through the threaded rod. The direction of movement of the fixing component through the threads is perpendicular to the axis of the hanger. When the fixing component is fixedly connected to the hanger, the fixed end of the fixing component abuts against the outside of the hanger.

[0015] Preferably, the lifting member includes a lifting column, and the outside of the lifting column is provided with a clearance groove.

[0016] Preferably, the retaining ring includes a C-shaped ring and a guide block, with the guide block provided at the end of the C-shaped ring near the lifting member, and the guide block matching the shape of the clearance groove.

[0017] Preferably, the suspension device includes an inner wall and a slot. When the guide block is engaged in the clearance slot, the C-ring slides against the inner wall of the suspension device without engaging with the slot.

[0018] Preferably, the fastening assembly further includes an annular push plate, which is coaxially fixed below the threaded ring plate, and the lowermost end of the annular push plate abuts against the guide surface of the guide block.

[0019] Preferably, when the annular push plate moves downward by rotating the threaded ring plate, the annular push plate is located between the guide block and the clearance groove, and the C-shaped ring connected to the guide block engages with the groove inside the suspension device.

[0020] Preferably, the retaining ring is composed of several arc-shaped retaining ring components, which are evenly arranged circumferentially on the lifting column, with gaps between adjacent arc-shaped retaining ring components.

[0021] Preferably, each arc-shaped retaining ring includes a corresponding C-ring and a guide block.

[0022] The technical solution of this application has at least the following advantages and beneficial effects:

[0023] In this invention, by setting a displacement driving component and a fixing component, one end of the displacement driving component is quickly fixed to the hanger, and then the screw displacement of the displacement driving component is used to pull the lifting component into the hanger and into place.

[0024] In this utility model, a sealing ring is set, and the lifting part that is displaced to the position seals the opening of the hanger. Then, air pressure is introduced into the inside of the hanger through the air pressure valve for pre-pressure test. Then, the air pressure detector is used to check whether the air pressure is normal to ensure that the hanger functions normally.

[0025] In this invention, a spiral displacement structure is used to open the retaining ring on the lifting component, so that the retaining ring simultaneously engages the lifting component and the external suspension device, thereby locking the suspension device and achieving a simple and reliable locking mechanism, while reducing the risk of detachment. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of this utility model.

[0027] Figure 2 This is a schematic diagram of the front view of the structure of this utility model.

[0028] Figure 3 This is a partial structural diagram of the fastening component in this utility model.

[0029] Figure 4 This utility model Figure 3 A magnified structural diagram of A in the diagram.

[0030] In the diagram: 1-Suspension device, 2-Lifting component, 201-Lifting column, 202-Positioning column, 203-Allowing groove, 204-Shackle, 3-Fastening assembly, 301-Threaded ring plate, 302-Annular push plate, 4-Support rod, 401-Support arm, 402-Handle, 5-Displacement drive assembly, 501-Threaded rod one, 502-Threaded sleeve, 503-Threaded rod two, 6-Fixing assembly, 7-Sealing ring, 8-Snap ring, 801-C-ring, 802-Guide block, 9-Pneumatic valve. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] It should be noted that similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. The terms "center," "upper," "lower," "inner," and "outer," indicating orientation or positional relationships based on the orientation or positional relationships shown in the figures, or the orientation or positional relationships commonly used when the product is in use, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore should not be construed as a limitation on this application. It should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0033] Example

[0034] Please refer to Figures 1-4 This utility model provides a mechanical underwater oil pipe hanger lifting tool, including a hanger 1, a lifting component 2, a fastening component 3, a support rod 4, a displacement driving component 5, a fixing component 6, a sealing ring 7, a retaining ring 8, and a pneumatic valve 9.

[0035] Furthermore, when mechanically lifting the hanger 1 located on the underwater oil pipe, the lifting component 2 is initially fitted inside the hanger 1. One end of the displacement drive assembly 5 is fixedly connected to the outside of the lifting component 2, and the other end of the displacement drive assembly 5 is fixedly connected to the fixing component. The fixing component is fixedly connected to the outside of the hanger 1.

[0036] Preferably, the fixing component 6 fixes one end of the displacement driving component 5 to the hanger 1, and then the displacement of the displacement driving component 5 drives the lifting component 2 connected to it to gradually move into the depth of the hanger 1, so that the lifting component 2 reaches the snap-fit ​​position inside the hanger 1, which facilitates the snap-fit ​​lifting operation.

[0037] Furthermore, a fastening assembly 3 is fitted on the outside of the lifting member 2. The fastening assembly 3 is connected to the lifting member 2 by a thread, so that the fastening assembly 3 can move relative to the lifting member 2, and the direction of movement of the fastening assembly 3 is along the axial direction of the suspension 1.

[0038] Furthermore, the lifting component 2 is externally fitted with a retaining ring 8, the suspension device 1 is internally provided with a retaining groove, and the lowest fastening end of the fastening component 3 abuts against the retaining ring 8.

[0039] Preferably, when the fastening component 3 is not displaced, it is positioned above the retaining ring 8. The maximum diameter of the retaining ring 8 is smaller than the minimum diameter of the retaining groove, so that the retaining ring 8 does not contact the retaining groove, facilitating the movement of the retaining ring 8 along with the lifting member 2 inside the suspension 1. When the fastening component 3 is displaced downward, it applies a downward force to the retaining ring 8 and pushes it outward. At this time, the fastening end of the fastening component 3 is located between the retaining ring 8 and the lifting member 2, causing the retaining ring 8 to be pushed outward and engage with the retaining groove inside the external suspension 1. When the lifting member 2 is pulled up, the suspension 1 can be lifted up through the retaining ring 8.

[0040] Please refer to Figure 2 and Figure 3 In this embodiment, the lifting member 2 includes a lifting column 201, a positioning column 202, a clearance groove 203, and a shackle 204.

[0041] Specifically, the lifting column 201 is slidably sleeved inside the hanger 1, and the lower end of the lifting column 201 is coaxially fixed with a positioning column 202, and a sealing ring 7 is fixedly sleeved on the positioning column 202.

[0042] After the entire lifting component 2 slides into the interior of the suspension 1 via the displacement drive assembly 5, the sealing ring 7 will slide to the sealing position inside the suspension 1 to seal the sliding gap between the interior of the suspension 1 and the lifting column 201, preventing water or air from continuing to enter the interior of the suspension 1, which facilitates the subsequent air pressure test of the suspension 1.

[0043] The lifting column 201 is also fixedly installed at the top with a shackle 204. After the retaining ring 8 is engaged and fixed to the suspension 1, the lifting end of the hydraulic lifting machine in the external environment can be connected to the shackle 204, thereby lifting the suspension 1.

[0044] In addition, a clearance groove 203 is provided on the outer wall of the lifting column 201. The position of the clearance groove 203 corresponds to the position of the retaining ring 8, so that the retaining ring 8 sleeved on the outside of the lifting column 201 can be radially displaced along the lifting column 201 through the clearance groove 203, so that the retaining ring 8 can be engaged or disengaged from the retaining groove inside the hanger 1.

[0045] Please refer to Figure 1 and Figure 2In this embodiment, a pressure valve 9 is fixedly installed on the top of the lifting member 2. The pressure valve 9 is connected to the inside of the hanger 1 through a valve pipe installed in the lifting member 2. The pressure valve 9 is also connected to an external air pump, so that the air pump pumps pressure into the inside of the hanger 1 through the pressure valve 9. Since the bottom of the hanger 1 is blocked and the opening of the hanger 1 is sealed by a sealing ring 7, the air pressure inside the hanger 1 will gradually increase. A pressure detector is also fixedly installed on the pressure valve 9, which can detect the air pressure inside the hanger 1, thereby completing the preliminary pressure test before the hanger 1 is installed on the underwater oil pipe.

[0046] Please refer to Figure 1 and Figure 2 In this embodiment, support rods 4 are respectively provided on both sides of the fastener. The support rods 4 are connected to one end of the displacement driving component 5 to support and fix the displacement driving component 5.

[0047] The support rod 4 includes a support arm 401 and a handle 402.

[0048] One end of the support arm 401 is fixedly installed on the outside of the fastener, and the other end of the support arm 401 is fixedly provided with a handle 402. When the handles 402 on both sides of the fastener are pushed, the fastener will rotate relative to the lifting member 2, thereby realizing the relative displacement of the fastener relative to the lifting member 2.

[0049] Please refer to Figure 2 The displacement drive assembly 5 includes a threaded rod 501, a threaded sleeve 502, and a threaded rod 503.

[0050] Specifically, the threaded sleeve 502 has a threaded hole that runs through it axially. The upper and lower ends of the threaded sleeve 502 are respectively threaded with a threaded rod 501 and a threaded rod 503. The threaded rod 501 is vertically fixed on the support arm 401, and the threaded rod 503 is set on the fixing component 6. The displacement direction of the threaded sleeve 502 is consistent with the axial direction of the hanger 1. Thus, when the threaded sleeve 502 is manually rotated, the threaded sleeve 502 will move away from or closer to the threaded rod, thereby increasing or decreasing the distance between the two threaded rods, so as to drive the lifting member 2 connected to the fastening component 3 to slide into or out of the interior of the hanger 1.

[0051] The fixing component 6 is configured as a threaded column, and the threaded rod 503 has a threaded hole that runs through it laterally. The threaded column is threaded into the threaded hole of the threaded rod 503. When the threaded column is rotated, it can be moved laterally closer to the outside of the hanger 1 until it comes into contact with it. At this time, the threaded columns at both ends of the hanger 1 fix the threaded rod 503 to the outside of the hanger 1 through frictional resistance, ensuring the normal displacement of the threaded sleeve 502 on the threaded rod 503.

[0052] In addition, the threads of threaded rod 501 and threaded rod 503 are in opposite directions. When the threaded sleeve 502 is rotated, the threaded rods at the upper and lower ends of the threaded sleeve will move away or closer at the same time, thereby quickly driving the lifting component 2 to move.

[0053] It is worth noting that the threaded rod 501 and the support arm 401 are locked together by bolts, which facilitates disassembly so that the subsequent fasteners can rotate relative to the suspension 1.

[0054] The working process is as follows: After the lifting component 2 is installed inside the suspension 1, the fixing component will first be fixed to the outside of the suspension 1. Then, the displacement drive component 5 will be moved to drive the fastening component 3 and the lifting component 2 to extend into the depth of the suspension 1 until the sealing ring 7 on the lifting component 2 reaches the sealing position to seal. At this time, the displacement drive component 5 and the matching fixing component 6 on the support arm 401 will be manually removed. Then, the handle 402 will be turned to drive the fastening component 3 to rotate and continue to move downward relative to the lifting component 2 (at this time, the lifting component 2 will be subject to the frictional resistance of the sealing ring 7 and will not rotate relative to it). This will cause the fastening end of the fastener to move down and push the retaining ring 8, opening the retaining ring 8 into the slot of the suspension 1. The retaining ring 8 will be used to snap the suspension 1 and the lifting component 2 together. After the air pressure test is performed, the lifting operation will be carried out.

[0055] Please refer to Figures 2-4 In this embodiment, the fastening assembly 3 includes a threaded ring plate 301 and an annular push plate 302.

[0056] The retaining ring 8 includes a C-ring 801 and a guide block 802.

[0057] Specifically, the inner ring of the threaded ring plate 301 is threaded, and the threaded ring plate 301 is threadedly sleeved on the outer wall of the lifting column 201. The outer wall of the threaded ring plate 301 is slidably connected to the inside of the hanger 1. When the threaded ring plate 301 rotates, it can be vertically displaced relative to the lifting column 201.

[0058] A ring-shaped push plate 302 is coaxially fixed below the threaded ring plate 301, and the lowest end of the ring-shaped push plate 302 is the fastening end of the fastening component 3.

[0059] Specifically, the C-shaped ring 801 is sleeved on the outside of the lifting column 201, and a guide block 802 is provided at one end of the C-shaped ring 801 near the lifting member 2. The guide block 802 matches the shape of the relief groove 203 on the lifting column 201.

[0060] The suspension 1 includes an inner wall and a slot. When the lifting member 2 slides inside the suspension 1 via the displacement drive assembly 5, the guide block 802 engages in the clearance groove 203, causing the C-ring 801 to move closer to the lifting column 201. This allows the outer edge of the C-ring 801 to slide against the inner wall of the suspension 1 without engaging with the slot in the suspension 1, thus ensuring the normal displacement of the lifting member 2.

[0061] When the annular push plate 302 moves downward through the rotation of the threaded ring plate 301, the lowest end of the annular push plate 302 will begin to move downward and abut against the guide block 802. The guide surface of the guide block 802 faces the lowest end of the annular ring plate. Therefore, under the downward thrust of the annular push plate 302, the lowest end of the annular push plate 302 will gradually move downward between the guide block 802 and the relief groove 203, so that the C-shaped ring 801 is opened up, away from the lifting column 201, and close to the slot of the external suspension, so that the C-shaped ring 801 can engage with the slot inside the suspension 1. At this time, the guide block 802 will not completely disengage from the relief groove 203, so that the entire retaining ring 8 can engage together with the lifting component 2, the fastener and the inside of the suspension 1, thereby ensuring that the lifting component 2 can smoothly lift the suspension 1.

[0062] It is worth noting that a marking line is also set on the outer wall of the lifting column 201. When the threaded ring plate 301 is manually rotated until the retaining ring 8 is engaged with the retaining groove, the spiral ring plate will just move down to the marking line of the lifting column 201, which makes it easy for external personnel to observe that the internal retaining ring 8 is successfully engaged, and facilitates the next step of the work.

[0063] It is worth noting that because the retaining ring 8 needs to withstand the gravity of the suspension 1 when it is engaged, the retaining ring 8 is a rigid structure. In this case, the retaining ring 8 sleeved on the outside of the lifting column 201 is composed of multiple arc-shaped retaining ring parts arranged circumferentially on the lifting column 201. Each arc-shaped retaining ring part contains a corresponding C-shaped ring 801 and a guide block 802. By utilizing the gap between adjacent arc-shaped retaining ring parts, it is ensured that when multiple guide blocks 802 are pushed by the annular push plate 302, they can be displaced individually toward the outside of the clearance groove 203, thereby driving multiple C-shaped rings 801 to engage with the groove individually. This ensures that the entire rigid retaining ring 8 structure can be smoothly opened and deformed by the annular push plate 302.

[0064] The various embodiments of this utility model have now been described in detail. To avoid obscuring the concept of this utility model, some details known in the art have not been described. Those skilled in the art will fully understand how to implement the technical solution of this utility model based on the above description. The scope of this utility model is defined by the appended claims.

Claims

1. A mechanical underwater tubing hanger lifting tool, comprising a lifting component (2), characterized in that, The lifting member (2) is sleeved inside the hanger (1). One end of the displacement drive assembly (5) is fixedly connected to the outside of the lifting member (2). The other end of the displacement drive assembly (5) is fixedly connected to the fixing member. The fixing member is fixedly connected to the outside of the hanger (1). The lifting member (2) is provided with a fastening assembly (3) for external relative movement, and the moving direction of the fastening assembly (3) is coaxial with that of the hanger (1); The lifting member (2) is fitted with a retaining ring (8) on the outside, and the hanger (1) is provided with a slot. When the fastening end of the fastening component (3) is above the retaining ring (8), the retaining ring (8) does not contact the slot inside the hanger (1); when the fastening end of the fastening component (3) is between the retaining ring (8) and the lifting member (2), the retaining ring (8) engages with the slot inside the hanger (1).

2. The mechanical underwater tubing hanger lifting tool according to claim 1, characterized in that, The bottom of the lifting member (2) is fixedly fitted with a sealing ring (7), and the outer ring of the sealing ring (7) abuts against the inner wall of the hanger (1).

3. The mechanical underwater tubing hanger lifting tool according to claim 1, characterized in that, The top of the lifting member (2) is provided with a pneumatic valve (9), which is connected to the interior of the hanger (1) through the lifting member (2). The pneumatic valve (9) is connected to an external air pump, and a pneumatic pressure detector is provided on the pneumatic valve (9).

4. The mechanical underwater tubing hanger lifting tool according to claim 1, characterized in that, The fastening assembly (3) includes a threaded ring plate (301), the inner ring of which is threaded, and the threaded ring plate (301) is sleeved on the outside of the lifting member (2) and is connected to the external thread of the lifting member (2).

5. A mechanical underwater tubing hanger lifting tool according to claim 1, characterized in that, The displacement drive assembly (5) includes a threaded sleeve (502), which has a threaded hole axially through it. The upper and lower ends of the threaded sleeve (502) are respectively threaded with a threaded rod one (501) and a threaded rod two (503). The threaded rod one (501) is mounted on the fastening assembly (3), and the threaded rod two (503) is mounted on the fixing assembly (6). The displacement direction of the threaded sleeve (502) is consistent with the axial direction of the hanger (1). The threads of thread rod one (501) and thread rod two (503) have opposite helical directions.

6. A mechanical underwater tubing hanger lifting tool according to claim 5, characterized in that, The fixing component (6) is provided with threads on the outside. The threads of the fixing component (6) are threaded through the threaded rod (503). The direction of movement of the fixing component (6) through the threads is perpendicular to the axis of the hanger (1). When the fixing component (6) is fixedly connected to the hanger (1), the fixed end of the fixing component (6) abuts against the outside of the hanger (1).

7. A mechanical underwater tubing hanger lifting tool according to claim 1, characterized in that, The lifting member (2) includes a lifting column (201), and the outside of the lifting column (201) is provided with a clearance groove (203). The retaining ring (8) includes a C-shaped ring (801) and a guide block (802). The guide block (802) is provided at one end of the C-shaped ring (801) near the lifting member (2). The guide block (802) matches the shape of the relief groove (203). The interior of the suspension (1) includes the inner wall of the suspension (1) and the slot. When the guide block (802) is engaged in the relief groove (203), the C-ring (801) slides against the inner wall of the suspension (1) without engaging with the slot.

8. A mechanical underwater tubing hanger lifting tool according to claim 1, characterized in that, The fastening assembly (3) also includes an annular push plate (302), which is coaxially fixed below the threaded ring plate (301), and the lowest end of the annular push plate (302) abuts against the guide surface of the guide block (802). When the annular push plate (302) moves downward by rotating the threaded ring plate (301), the annular push plate (302) is located between the guide block (802) and the clearance groove (203), and the C-shaped ring (801) connected to the guide block (802) engages with the groove inside the matching hanger (1).

9. A mechanical underwater tubing hanger lifting tool according to claim 7, characterized in that, The retaining ring (8) is composed of several arc-shaped retaining ring parts, which are evenly arranged in a circular pattern on the lifting column (201), with gaps between adjacent arc-shaped retaining ring parts; Each arc-shaped retaining ring includes a corresponding C-ring (801) and a guide block (802).

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