Adaptive synchronous hydraulic clamping device

Abstract

This invention provides an adaptive synchronous hydraulic clamping device, comprising a main body, the main body including a pressure cap for sleeved on the outside of a tubing column, a base disposed below the pressure cap, and a clamping mechanism disposed within the main body, the clamping mechanism including a thrust support seat forming a sealed connection with the base, a limiting support cylinder sleeved on the outside of the tubing column and connected to the base, and a clamping slip assembly disposed between the pressure cap and the limiting support cylinder for clamping the tubing column.

Description

Technical Field

[0001] This invention relates to the field of petroleum machinery, and more specifically to an adaptive synchronous hydraulic clamping device. Background Technology

[0002] Currently, tubing is widely used in the field of oil and gas engineering. Whether it is uncoupling and tightening between tubing or tripping operations, tubing clamping and holding tools are required.

[0003] Clamping and holding tools are key equipment that determines the working tubing string and the working load. However, existing clamping mechanisms are generally complex in structure and difficult to adapt to tubing strings of different sizes, making it difficult to guarantee reliability. The quality of the clamping and holding device directly affects drilling operation efficiency, safety, and economic benefits. To ensure the smooth operation of tasks such as tubing string tripping, well workover, drilling, and well completion during non-pressure well operations, as well as rescue operations after a blowout, the reliability and stability of the tubing string clamping equipment must be strictly required.

[0004] Therefore, it is desirable in this field to provide an adaptive synchronous hydraulic clamping device to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to propose an adaptive synchronous hydraulic clamping device, which can achieve precise control of the clamping force based on the hydraulic pressure acting on the thrust support, thereby making it easier to clamp pipes of different diameters, thus greatly reducing installation and maintenance costs and improving economic efficiency.

[0006] According to the present invention, an adaptive synchronous hydraulic clamping device is provided, comprising a main body mechanism, the main body mechanism including a pressure cap for sleeved on the outside of a tubular column, and a base disposed below the pressure cap, and

[0007] The clamping mechanism is installed in the main body and includes a thrust support seat that forms a sealed connection with the base, a limiting support cylinder that is sleeved on the outside of the tube column and connected to the base, and a clamping slip assembly that is installed between the pressure cap and the limiting support cylinder for clamping the tube column.

[0008] In one embodiment, the thrust support includes a body configured as a hollow sleeve and a drive portion configured as an annular extending radially outward from a side end of the body, wherein the drive portion forms a sealed connection with the inner wall of the base.

[0009] In one embodiment, an inner conical surface is formed within the body, and a plurality of spaced-apart track grooves are provided on the inner conical surface.

[0010] In one embodiment, the locking jaw assembly consists of a plurality of spaced-apart locking jaws, and the outer wall of the locking jaws is provided with a protrusion that is adapted to the track groove.

[0011] In one embodiment, the inner wall of the locking slip is provided with slip teeth for engaging the tubing.

[0012] In one embodiment, a sealing ring is provided at the contact point between the gland and the base, and a sealing ring is provided outside the sealing ring to contact the body and the base respectively.

[0013] In one embodiment, a first oil port and a second oil port are provided on the side wall of the base, spaced apart. The first oil port is axially positioned above the drive unit, and the second oil port is axially positioned below the drive unit.

[0014] The thrust support is configured to move upward under the propulsion of the oil, thereby causing the locking slips to retract inward and engage with the outer wall of the tubing through the slip teeth.

[0015] In one embodiment, a fixing groove is provided on the inner wall of the base, and the limiting support cylinder is embedded into the base through the fixing groove.

[0016] In one embodiment, the base is fixedly connected to the cover by fasteners, the fasteners including an inner ring bolt disposed in the base, a locking claw extending sequentially through the base and the cover, and an inner tightening bolt adapted to the inner ring bolt and used to limit the locking claw.

[0017] In one embodiment, a plurality of fasteners are arranged at intervals along the circumference of the base.

[0018] Compared with the prior art, the advantages of the present invention are as follows:

[0019] Firstly, compared to traditional tubing clamping devices, this invention can achieve precise control of the clamping force based on the hydraulic pressure acting on the thrust support, thereby making it easier to clamp tubing of different diameters, which greatly reduces installation and maintenance costs and improves economic efficiency.

[0020] Secondly, when clamping the tubing, all the locking jaws in this device can synchronously retract towards the center under the action of the thrust support to fully clamp the tubing. This method makes the surface of the tubing more uniformly stressed, thus making the clamping effect of the adaptive synchronous hydraulic clamping device better and more reliable, which helps to achieve precise and data-driven control of the clamping force.

[0021] Furthermore, because this device can simultaneously control multiple locking slips to complete the inward contraction or outward expansion action, it improves the overall structural reliability and the sensitivity of the action response of the device. Attached Figure Description

[0022] The invention will now be described in detail with reference to the accompanying drawings, in which:

[0023] Figure 1 The schematic diagram illustrates the structure of the adaptive synchronous hydraulic clamping device according to the present invention;

[0024] Figure 2 for Figure 1 Sectional view of the cross section at point AA;

[0025] Figure 3 for Figure 1 A partial view showing the structure of the locking slip;

[0026] Figure 4 for Figure 1 A partial view showing the structure of the thrust support.

[0027] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not drawn to scale.

[0028] The meanings of the reference numerals in the attached figures are as follows:

[0029] 10 Pipe column, 11 Gland, 12 Base, 13 Inner ring bolt, 14 Inner tightening bolt, 15 Locking claw;

[0030] 121 First oil port, 122 Second oil port, 123 Fixing groove;

[0031] 20 Thrust support, 21 Main body, 22 Drive unit;

[0032] 211 Inner conical surface, 212 Track groove;

[0033] 31 Limiting support cylinder, 32 Locking slip, 33 Sealing ring;

[0034] 321 protrusion, 322 locking tooth. Detailed Implementation

[0035] To make the technical solutions and advantages of the present invention clearer, exemplary embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not an exhaustive list of all embodiments. Furthermore, without conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0036] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0037] In this invention, unless otherwise explicitly specified and limited, the terms "installation", "connection", "linking", "fixing", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components.

[0038] Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0039] The invention will now be further described with reference to the accompanying drawings.

[0040] Figure 1 The schematic diagram illustrates the structure of the adaptive synchronous hydraulic clamping device 100 according to the present invention.

[0041] like Figure 1 As shown, the adaptive synchronous hydraulic clamping device 100 of the present invention mainly includes a main body mechanism. Preferably, the main body mechanism includes a pressure cap 11 for sleeved on the outside of the tube column 10, and a base 12 sleeved on the outside of the tube column 10 and located below the pressure cap 11.

[0042] In one embodiment, the base 12 is fixedly connected to the cover 11 by fasteners. Preferably, the fasteners include an inner ring bolt 13 disposed inside the base 12, a locking claw 15 extending sequentially through the base 12 and the cover 11, and an inner tightening bolt 14 adapted to the inner ring bolt 13.

[0043] Preferably, the inner ring bolt 13 is threadedly connected to the base 12, and the inner tightening bolt 14 can cooperate with the inner ring bolt 13 to limit the locking claw 15 between the pressure plate 11 and the base 12, thereby improving the stability of the adaptive synchronous hydraulic clamping device 100 during operation.

[0044] In this invention, the locking surface of the locking claw 15 is constructed with a concave-convex structure, which can correspond one-to-one with the special groove on the pressure cover 11. Therefore, under the action of the fastener, the base 12 and the pressure cover 11 can be fully fixedly connected.

[0045] Preferably, a plurality of fasteners are arranged at intervals along the circumference of the base 12, and adjacent fasteners are equidistantly distributed. This ensures that the pressure cap 11 and the base 12 are always in a fixed connection state. In this invention, the fasteners are preferably arranged in 16 sets.

[0046] From this point on, the cover 11 and the base 12 form an independent cavity under the action of fasteners, which can effectively protect the clamping mechanism installed inside (described below) from the influence of harsh external environments.

[0047] Figure 2 for Figure 1 Sectional view of the cross section at point AA.

[0048] Figure 3 for Figure 1 A partial view showing the structure of the locking clip.

[0049] Figure 4 for Figure 1 A partial view showing the structure of the thrust support.

[0050] According to the present invention, such as Figures 1-4 As shown, the adaptive synchronous hydraulic clamping device 100 also includes a clamping mechanism disposed within the main body. Preferably, the clamping mechanism includes a thrust support 20 and a clamping slip assembly, wherein the clamping slip assembly is sleeved on the outside of the tube column and can clamp the tube column 10 under the action of the thrust support 20, the details of which are described below.

[0051] In one embodiment, such as Figure 1 As shown, locking teeth 322 are provided on the inner wall of the locking jaws 32. Preferably, the locking teeth 322 are evenly arranged laterally along the inner arc surface of the locking jaws 32, and the locking teeth 322 are treated with a special material to have high strength. In addition, the arc-shaped design of the locking teeth 322 allows for a larger contact area with the pipe, thereby making it easier to embed into the outer surface of the pipe column 10 to further provide a greater locking force.

[0052] In one embodiment, such as Figure 1 As shown, the clamping mechanism also includes a limiting support cylinder 31. Preferably, the limiting support cylinder 31 is disposed below the clamping slip assembly, and both ends of the clamping slip assembly are axially abutted against the pressure cap 11 and the limiting support cylinder 31, respectively, to limit the axial position of the clamping slip assembly, thereby ensuring that the clamping slip assembly can only move radially, thus providing technical support for the subsequent clamping function.

[0053] In one embodiment of the present invention, such as Figure 1As shown, a fixing groove 123 in the form of a ring is provided on the inner wall surface of the base 12. Preferably, the limiting support cylinder 31 is sleeved on the outside of the column 10 and can be embedded in the base 12 through the fixing groove 123. At the same time, the thrust support 20 is sleeved on the outside of the limiting support cylinder 31, and part of the outer wall of the thrust support 20 forms a sealed connection with the inner wall of the base 12, thereby facilitating the subsequent adjustment of the overall strength of the clamp.

[0054] Preferably, a threaded hole is provided on the lower end face of the base 12, so as to enable docking with other devices or provide technical support for subsequent functional expansion.

[0055] In this invention, such as Figure 1 As shown, the thrust support 20 includes a main body 21 configured as a hollow sleeve, and a drive portion 22 extending radially outward from the side end of the main body 21. Preferably, the drive portion 22 is configured in an annular shape, and the drive portion 22 forms a sealed connection with the inner wall of the base 12, thereby forming two independent adjustment chambers, namely a lower chamber and an upper chamber.

[0056] In one embodiment, such as Figure 1 As shown, a first oil port 121 and a second oil port 122 are provided on the side wall of the base 12 at intervals. Preferably, the first oil port 121 and the second oil port 122 are respectively connected to two independent adjustment chambers. At the same time, the first oil port 121 is located above the drive unit 22 in the axial direction, while the second oil port 122 is located below the drive unit 22 in the axial direction.

[0057] From this point on, by injecting or discharging oil into the regulating chamber through the oil port (i.e., the first oil port 121 or the second oil port 122), the relative position of the thrust support 20 and the base 12 can be adjusted, so as to further drive the locking slip 32 (described below) to complete the inward contraction or outward expansion action, thereby completing the clamping or unlocking operation of the tubing string 10.

[0058] Preferably, sealing rings are provided between the inner wall of the base 12 and the main body 21 and drive part 22 of the thrust support 20, so as to improve the sealing performance between the thrust support 20 and the base 12.

[0059] In one embodiment, such as Figure 1 As shown, a sealing ring 33 is provided at the contact point between the pressure cap 11 and the base 12. Preferably, sealing rings that contact the pressure cap 11 and the base 12 are respectively provided at both ends of the sealing ring 33. Therefore, the sealing ring 33 can be pressed tightly onto the base 12 by the pressure cap 11, thereby improving the sealing performance of the adaptive synchronous hydraulic clamping device 100.

[0060] In one embodiment, such as Figures 2-4As shown, the locking mechanism consists of multiple locking latches 32 arranged at intervals, and protrusions 321 are provided on the outer wall of the locking latches 32. At the same time, an inner conical surface 211 is formed inside the main body 21, and multiple track grooves 212 are provided on the inner conical surface 211 at intervals.

[0061] In this invention, a total of eight locking slips 32 are provided, and the locking slips 32 and the track grooves 212 are arranged in a one-to-one correspondence along the circumference. Preferably, the track grooves 212 are constructed as dovetail-shaped track grooves.

[0062] Preferably, the protrusion 321 of the locking slip 32 can be nested within the track groove 212, and the locking slip 32 can form a sliding connection with the track groove 212 through the protrusion 321. Thus, under the hydraulic thrust generated by the hydraulic oil, the thrust support 20 will move axially upwards, thereby causing the locking slip 32 to complete an inward contraction or outward expansion action.

[0063] Therefore, based on specific engineering requirements, on-site operators can achieve precise control of the clamping force by applying hydraulic pressure to the thrust support 20, thereby making it easier to clamp tubing 10 of different diameters.

[0064] During the preparation for startup, the thrust support 20 is at its lowest position, and the locking slip 32 expands outward to its maximum angle.

[0065] When clamping the tubing string 10 is required, the adaptive synchronous hydraulic clamping device must first be fitted onto the outside of the tubing string 10. Simultaneously, it connects to an external hydraulic device through the second oil port 122 and injects hydraulic oil into the lower chamber. At the same time, the hydraulic oil in the upper chamber is squeezed out to achieve pressure balance between the upper and lower chambers. During this process, the thrust support 20 moves upward, simultaneously causing the locking slips 32 to retract towards the center, fully clamping the tubing string 10 to complete the clamping operation.

[0066] When release is required, hydraulic oil is injected into the upper chamber through the first oil port 121, while the hydraulic oil in the lower chamber is squeezed out to restore pressure balance between the upper and lower chambers. During this process, the thrust support 20 will move downwards, and the locking slip 32 will expand outwards simultaneously, thereby releasing the locking state of the tubing string 10.

[0067] Compared with existing technologies, the advantages of this invention are:

[0068] Firstly, compared with traditional pipe clamping devices, the present invention can achieve precise control of the clamping force based on the hydraulic pressure acting on the thrust support 20, thereby making it easier to clamp pipes 10 of different diameters, thus greatly reducing installation and maintenance costs and improving economic efficiency.

[0069] Secondly, when clamping the tubing string 10, all the locking slips 32 in this device can synchronously retract towards the center under the action of the thrust support 20 to fully clamp the tubing string 10. This method makes the surface of the tubing string 10 more uniformly stressed, thereby making the clamping effect of the adaptive synchronous hydraulic clamping device 100 better and more reliable, which helps to achieve precise and data-driven control of the clamping force.

[0070] Furthermore, since this device can simultaneously control multiple locking slips 32 to complete the inward contraction or outward expansion action, it improves the overall structural reliability and the sensitivity of the action response of the device.

[0071] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art can easily make changes or modifications within the scope of the present invention, and such changes or modifications should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An adaptive synchronous hydraulic clamping device, comprising: The main structure includes a pressure cap (11) for fitting over the tube column (10), and a base (12) disposed below the pressure cap (11). The clamping mechanism is provided in the main body and includes a thrust support seat (20) that forms a sealed connection with the base (12), a limiting support cylinder (31) that is sleeved on the outside of the column (10) and connected to the base (12), and a clamping slip assembly that is provided between the pressure cap (11) and the limiting support cylinder (31) for clamping the column (10).

2. The adaptive synchronous hydraulic clamping device according to claim 1, characterized in that, The thrust support (20) includes a main body (21) configured as a hollow sleeve, and a drive part (22) configured as an annular extending radially outward from the side end of the main body (21), wherein the drive part (22) forms a sealed connection with the inner wall of the base (12).

3. The adaptive synchronous hydraulic clamping device according to claim 2, characterized in that, An inner conical surface (211) is formed within the main body (21), and a plurality of spaced track grooves (212) are provided on the inner conical surface (211).

4. The adaptive synchronous hydraulic clamping device according to claim 3, characterized in that, The locking mechanism consists of multiple locking latches (32) arranged at intervals, and the outer wall of the locking latches (32) is provided with a protrusion (321) that is adapted to the track groove (212).

5. The adaptive synchronous hydraulic clamping device according to claim 4, characterized in that, The inner wall of the locking slip (32) is provided with slip teeth (322) for engaging the tube column (10).

6. The adaptive synchronous hydraulic clamping device according to claim 5, characterized in that, A sealing ring (33) is provided at the contact point between the pressure cap (11) and the base (12), and a sealing ring is provided outside the sealing ring (33) to contact the main body (21) and the base (12) respectively.

7. The adaptive synchronous hydraulic clamping device according to claim 6, characterized in that, The base (12) has a first oil port (121) and a second oil port (122) arranged at intervals on its side wall. The first oil port (121) is located above the drive unit (22) in the axial direction, and the second oil port (122) is located below the drive unit (22) in the axial direction. The thrust support (20) is configured to move upward under the propulsion of the oil, thereby causing the locking slip (32) to retract inward and engage with the outer wall of the tubing (10) through the slip teeth (322).

8. The adaptive synchronous hydraulic clamping device according to any one of claims 1 to 7, characterized in that, A fixing groove (123) is provided on the inner wall of the base (12), and the limiting support cylinder (31) is embedded into the base (12) through the fixing groove (123).

9. The adaptive synchronous hydraulic clamping device according to any one of claims 1 to 7, characterized in that, The base (12) is fixedly connected to the cover (11) by fasteners, the fasteners including an inner ring bolt (13) disposed in the base (12), a locking claw (15) extending sequentially through the base (12) and the cover (11), and an inner tightening bolt (14) adapted to the inner ring bolt (13) and used to limit the locking claw (15).

10. The adaptive synchronous hydraulic clamping device according to claim 9, characterized in that, A plurality of fasteners are arranged at intervals along the circumference of the base (12).

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