Automatic well repair sucker rod chuck for oil field

Abstract

The utility model discloses an oil field automation well repair sucker rod chuck which comprises a base guide rail, sliding blocks are arranged on the base guide rail in a sliding mode, the sliding blocks are divided into a first sliding block and a second sliding block, the first sliding block and the second sliding block are connected through a driving device, and the sucker rod chuck further comprises a female sucker rod clamping device and a male sucker rod clamping device. The base guide rail, the sliding block and the oil rod clamping device are axially communicated; the female oil rod clamping device and the male oil rod clamping device are spliced into the oil rod clamping device through a step splicing seam; the female oil rod clamping device is arranged on the first sliding block, and the male oil rod clamping device is arranged on the second sliding block. The utility model has the advantages of simple structure, strong bearing capacity, low cost, small volume and light weight; compared with manual operation, the device is more reliable and safer, and automatic operation can be achieved.

Description

Technical Field

[0001] This utility model relates to the field of well workover equipment technology, specifically to an automated well workover sucker rod chuck for oilfields. Background Technology

[0002] Currently, in oilfield well workover operations, sucker rod tripping primarily involves using sucker rod chucks to suspend the sucker rods. Traditional methods rely on manual operation, requiring operators to repeatedly perform a series of repetitive actions such as detaching, moving, and suspending the rods. This is a heavy and dangerous form of labor. With oilfields placing increasing emphasis on safety, the demand for automated equipment is growing. Although many automated wellhead operation devices have emerged in China, most power chucks are only used for tubing tripping. Therefore, there is an urgent need to develop a new type of automated oilfield well workover sucker rod chuck to replace traditional manual operation, thereby improving work efficiency, reducing the labor intensity of operators, and meeting the significant demand for well workover operations.

[0003] Announcement No. CN221373493U discloses a wear-resistant and impact-resistant hanging clamp. Through the rotational action between the valve and the clamp body, the sleeve can be clamped and fixed. Furthermore, the inclined structure of the wear-resistant strip compensates for localized wear on the strip, ensuring the stability of the sleeve's fixation. To unlock the valve, simply pull the lever to slide, causing the movable plate to move. At this time, the spring contracts under force. As the movable plate moves, the rotation of the connecting rod causes the limit rod to slide under force until it separates from the opening on the clamp body, thus releasing the locking function.

[0004] Publication No. CN118065775A discloses a pipe and rod dual-purpose clamp, which consists of a clamp base, a clamp housing connected to the clamp base, a clamp slide installed inside the clamp housing, a T-shaped groove of the clamp slider engaging with a T-shaped groove of the clamp slide, allowing it to slide along the groove, a clamp slide cover with a clamp slide channel below, a first plane of the clamp slide channel engaging with a horizontal groove of the clamp slider, a second plane of the clamp slide channel connecting with the lower plane of the clamp slide cover, a clamp slide cover connected to the front end lug of the hydraulic cylinder on the hydraulic cylinder bracket by a pin, a pin stop plate fixing the pin to the clamp slide cover, a clamp tooth seat inserted into the clamp slider, a positioning pin installed in the pin mounting hole of the clamp slider allowing axial translation to fix the clamp tooth seat inside the clamp slider, and a spring installed in the hole of the clamp slider concentric with the positioning pin and pressing against the positioning pin.

[0005] The aforementioned existing technologies are difficult to automate.

[0006] Announcement No. CN220869349U discloses a drilling clamp for easy drill string fixation, including a fixing box. Two hanging plates are provided on one side of the fixing box. Two clamping blocks are fixedly installed on one side of the outer surface of the two hanging plates, and two clamping frames are fixedly installed on the other side of the outer surface of the two hanging plates. In actual operation, rotating the handle of this drilling clamp drives the bidirectional threaded rod to rotate. The two moving blocks then drive the two connecting plates to move in opposite directions, thereby moving the two hanging plates in opposite directions. This allows the hanging plates to clamp the drill string, and the extension rod is inserted into the clamping frames and fixed with fastening bolts, thus stably fixing the drill string.

[0007] This existing technology can achieve automated operation, but the moving block has low load-bearing capacity and is at risk of breakage during use.

[0008] In summary, the technical solutions, technical problems to be solved, and beneficial effects of the above-disclosed technologies are all different from those of this utility model. For more technical features, technical problems to be solved, and beneficial effects of this utility model, the above-disclosed technical documents do not provide any technical inspiration. Summary of the Invention

[0009] In view of the above-mentioned defects in the existing technology, the purpose of this utility model is to provide an automated well workover sucker rod chuck for oil fields.

[0010] To achieve the above objectives, the present invention adopts the following technical solution:

[0011] On one hand, this utility model provides an automated well workover sucker rod chuck for oilfields, including a base guide rail, on which a slider is slidably mounted. The slider is divided into a first slider and a second slider, which are connected by a driving device. It also includes a female rod engaging device and a male rod engaging device. The base guide rail, slider, and rod engaging device are axially connected. The female rod engaging device and the male rod engaging device are joined together by a stepped joint to form the rod engaging device. The female rod engaging device is mounted on the first slider, and the male rod engaging device is mounted on the second slider.

[0012] Furthermore, the male oil rod engaging device includes a first column and a large bushing, the large bushing being fixedly disposed on the upper end of the first column, and the first column being disposed on the upper end of the first slider;

[0013] Specifically, the master oil rod engaging device includes a second column and a small bushing. The small bushing is fixedly disposed on the upper end of the second column, and the second column is disposed on the upper end of the second slider.

[0014] Specifically, the first column and the second column are joined together to form a column by a first V-shaped angle, and the large bushing and the small bushing are joined together to form a limiting bushing by a second V-shaped angle;

[0015] Specifically, the first V-angle is larger than the second V-angle, forming a stepped joint between the limiting bushing and the column.

[0016] Furthermore, the column is a through pipe, and the center of the limiting bushing is provided with a locking hole;

[0017] Specifically, the vertex of the first V-shaped angle coincides with the axis of the column;

[0018] Specifically, the vertex of the second V-shaped angle is offset from the center of the engagement hole, and a guide groove is provided between the second V-shaped angle of the large bushing and the engagement hole.

[0019] Furthermore, the first V-angle is 90°-180°, the second V-angle is 60°-150°, and the first V-angle is larger than the second V-angle;

[0020] Specifically, the lines of symmetry of the first V-angle and the second V-angle coincide, and the lines of symmetry are parallel to the direction of slider movement. The first V-angle and the second V-angle are oriented in the same direction.

[0021] Furthermore, both the first slider and the second slider are provided with anti-detachment grooves at the ends away from the through hole, and both ends of the base guide rail are connected with anti-detachment baffles, the anti-detachment baffles being provided with protrusions that extend into the anti-detachment grooves.

[0022] Furthermore, the driving device includes a hydraulic cylinder and a hydraulic rod, the hydraulic rod being slidably connected to the hydraulic cylinder, the hydraulic cylinder having a first hinge body at the end away from the hydraulic rod, and the hydraulic rod having a second hinge body at the end away from the hydraulic cylinder; the first slider having a first lug on its side wall, and the second slider having a second lug on its side wall, the first lug and the second lug being located on the same side; the first hinge body being hinged to the first lug, and the second hinge body being hinged to the second lug.

[0023] Furthermore, the lower end of the base guide rail is connected to an oil pipe threaded seat, and the oil pipe threaded seat has a through hole in the center.

[0024] Furthermore, the first slider has a first through groove at one end near the through hole, and the second slider has a second through groove at one end near the through hole. The first through groove and the second through groove are joined together to form a through hole, which covers the through hole. The through hole is an oblong hole.

[0025] Furthermore, the base guide rail includes a base and two rails. The base is connected to the oil pipe thread seat by bolts, and the two rails are distributed parallel to each other on the upper and lower sides of the upper surface of the base.

[0026] Secondly, this utility model provides a method for using an automated well workover sucker rod chuck in an oilfield. Using the automated well workover sucker rod chuck described in one aspect includes the following steps:

[0027] When well workover is required, connect the tubing threaded seat to the wellhead equipment and use the drive device to make the first and second sliders at their maximum opening.

[0028] Raise the sucker rod coupling to the engagement height, start the drive device, the first slider and the second slider move towards each other, so that the large bushing and the small bushing are combined into the limiting bushing, and the first column and the second column are combined into the column. Release the sucker rod, and the sucker rod coupling sits in the engagement hole of the limiting bushing. After the sucker rod is stable, the well workover and sucker rod raising and lowering operation can be carried out.

[0029] When it is necessary to continue raising or lowering the sucker rod, lift the sucker rod, start the drive device and move the first and second sliders in opposite directions. When the first or second slider contacts the anti-detachment baffle, use it as a base point to make the other slider unfold into place. After it is fully unfolded, raise or lower the sucker rod and start the drive device to fix the sucker rod.

[0030] Compared with the prior art, the present invention has the following advantages:

[0031] 1. This utility model has a simple structure, strong load-bearing capacity, low cost, small size and light weight; it is more reliable and safer than manual operation and can realize automated sucker rod raising and lowering operations.

[0032] 2. This utility model solves the shortcomings of existing well workover operation sucker rod operation technology, eliminates the safety risks of manual operation, greatly improves work efficiency, and reduces the labor intensity of operators. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of an automated well workover sucker rod chuck for oilfields according to this utility model;

[0034] Figure 2 This is a schematic diagram showing the state of the chuck of this utility model when it is open;

[0035] Figure 3 This is a schematic diagram of the chuck of this utility model when it is closed;

[0036] Figure 4 This is an enlarged schematic diagram of the interlocking structure of this utility model;

[0037] Figure 5 This is a partial structural diagram of the slider and guide rail in this utility model.

[0038] In the diagram: 1-oil pipe threaded seat; 2-base guide rail; 201-anti-detachment baffle; 202-anti-detachment bolt; 3-first slider; 301-first ear seat; 302-anti-detachment groove; 4-second slider; 401-second ear seat; 5-sucker rod; 6-large bushing; 601-guide groove; 602-locking hole; 7-small bushing; 8-first column; 801-first upper flange; 802-first lower flange; 9-second column; 901-second upper flange; 902-second lower flange; 10-drive device; 1001-hydraulic cylinder; 1002-hydraulic rod; 1003-first hinge body; 1004-second hinge body; A-first V-angle; B-second V-angle. Detailed Implementation

[0039] 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.

[0040] Example 1:

[0041] Please see Figures 1 to 4 This utility model provides an automated well workover sucker rod chuck for oilfields, including a tubing threaded seat 1. The tubing threaded seat 1 has a through hole at its center. A base guide rail 2, which does not obstruct the through hole, is fixedly mounted on the upper end of the tubing threaded seat 1. A slider is slidably mounted on the base guide rail 2. A column corresponding to the through hole is mounted on the slider. A limit bushing is mounted on the column. The slider is divided into a first slider 3 and a second slider 4. The column is divided into a first column 8 and a second column 9 by a V-shaped cut along a first axial direction. The limiting bushing is divided into a large bushing 6 and a small bushing 7 by a second axial V-shaped cut. The first slider 3, the first column 8, and the large bushing 6 are connected together to form a female oil rod engaging device. The second slider 4, the second column 9, and the small bushing 7 are connected together to form a male oil rod engaging device. The female oil rod engaging device and the male oil rod engaging device are distributed on the right and left sides of the through hole. The female oil rod engaging device and the male oil rod engaging device are connected by a driving device 10, and automatic engaging is achieved by the driving device 10.

[0042] Specifically, different sizes of large bushings 6 and small bushings 7 are used to lock and fix sucker rods 5 of different sizes.

[0043] Specifically, the through hole in the center of the tubing thread seat 1 allows the sucker rod 5 to pass through.

[0044] Specifically, the base guide rail 2 includes a base and two rails. The base is connected to the oil pipe thread seat 1 by bolts, and the two rails are distributed in parallel on the upper and lower sides of the upper surface of the base.

[0045] Specifically, the first slider 3 is provided with a first through groove at one end near the through hole, and the second slider 4 is provided with a second through groove at one end near the through hole. The first through groove and the second through groove are combined to form a through hole, which covers the through hole.

[0046] Preferably, the via is an oblong hole, which has a wide range of applicability.

[0047] Specifically, the column is a through pipe, and the vertex of the first V-angle A of the first axial V-cut coincides with the axis of the column; the center of the limiting bushing is provided with a locking hole 602, the vertex of the second V-angle B of the second axial V-cut is offset from the center of the locking hole 602, and a guide groove 601 is provided between the second V-angle B of the large bushing and the locking hole 602, so that the sucker rod 5 can smoothly enter the locking hole 602, and the second V-angle B has a large selection range.

[0048] The locking hole 602 can lock the sucker rod 5 to prevent it from falling off, thus enabling subsequent operations.

[0049] Preferably, the first V-angle A is 90°-180°, the second V-angle B is 60°-150°, the first V-angle A is greater than the second V-angle B, the lines of symmetry of the first V-angle A and the second V-angle B coincide, the lines of symmetry are parallel to the direction of slider movement, the first V-angle A and the second V-angle B face the same direction, and the first V-angle A is greater than the second V-angle B, so that there is a stepped splicing seam between the assembled column and the limiting bushing, which improves the splicing tightness and the uniformity of force on the device.

[0050] Specifically, the driving device 10 includes a hydraulic cylinder 1001 and a hydraulic rod 1002. The hydraulic rod 1002 is slidably connected to the hydraulic cylinder 1001. The hydraulic cylinder 1001 has a first hinge body 1003 at the end away from the hydraulic rod 1002, and the hydraulic rod 1002 has a second hinge body 1004 at the end away from the hydraulic cylinder 1001. The first slider 3 has a first ear seat 301 on its side wall, and the second slider 4 has a second ear seat 401 on its side wall. The first ear seat 301 and the second ear seat 401 are located on the same side. The first hinge body 1003 is hinged to the first ear seat 301, and the second hinge body 1004 is hinged to the second ear seat 401.

[0051] It should be noted that the hydraulic rod 1002 is connected to the hydraulic cylinder 1001 via a piston. The hydraulic cylinder 1001 is provided with an inlet and an outlet. The hydraulic rod 1002 is driven to move by the inlet and outlet of the hydraulic cylinder. This is clear to those skilled in the art, so it will not be discussed further.

[0052] Specifically, the first column 8 is provided with a first upper flange 801 at its upper end and a first lower flange 802 at its lower end. The first upper flange 801 is bolted to the large bushing 6, and the first lower flange 802 is bolted to the first slider 3. The second column 9 is provided with a second upper flange 901 at its upper end and a second lower flange 902 at its lower end. The second upper flange 901 is bolted to the small bushing 7, and the second lower flange 902 is bolted to the second slider 4. The first upper flange 801 and the second upper flange 901 are assembled to form a complete flange, and the first lower flange 802 and the second lower flange 902 are assembled to form a complete flange.

[0053] Example 2:

[0054] Based on Example 1, combined with Figure 5 In this embodiment, the base guide rail 2 is provided with an anti-detachment mechanism. The ends of the first slider 3 and the second slider 4 away from the through hole are both provided with anti-detachment grooves 302. Both ends of the base guide rail 2 are connected with anti-detachment baffles 201. The anti-detachment baffles 201 are provided with protrusions that extend into the anti-detachment grooves 302. They can block the movement of the first slider 3 or the second slider 4 by contacting the stepped surface of the anti-detachment grooves 302 to prevent accidental detachment. They can also serve as fulcrums so that the driving device 10 can unfold the first slider 3 and the second slider 4.

[0055] Specifically, the anti-detachment baffle 201 is connected to the end of the base guide rail 2 via anti-detachment bolts 202.

[0056] Example 3:

[0057] Based on Example 2, this example provides a method for using an automated well workover sucker rod chuck in an oilfield, specifically including the following steps:

[0058] When well workover and sucker rod tripping operations are required, the tubing threaded seat is connected to the wellhead equipment, and the first slider 3 and the second slider 4 are brought to their maximum opening by the drive device 10.

[0059] Raise the coupling of sucker rod 5 to the engagement height, that is, raise the coupling of sucker rod 5 above the chuck. Start the drive device 10, and the first slider 3 and the second slider 4 move towards each other, so that the large bushing 6 and the small bushing 7 are assembled into a limiting bushing, and the first column 8 and the second column 9 are assembled into a column. Release sucker rod 5, and the coupling of sucker rod 5 sits in the engagement hole 602 of the limiting bushing. The large bushing 6 has a relatively large force and relatively large deformation, and can make close contact with the upper end face of the small bushing 7 and the second column 9, so that the force is evenly transmitted. After the sucker rod 5 is stable, the well workover and sucker rod raising and lowering operation can be carried out.

[0060] When it is necessary to continue raising or lowering the sucker rod 5, lift the sucker rod 5, start the drive device 10 so that the first slider 3 and the second slider 4 move in opposite directions. When the first slider 3 or the second slider 4 contacts the anti-detachment baffle 201, use it as a base point to make the other slider unfold into place, so as to avoid the large bushing 6 or the small bushing 7 not making full room after unfolding. After fully unfolding, lift the sucker rod 5 and start the drive device 10 to fix the sucker rod.

[0061] Until the well workover is completed, the lifting and lowering locking of sucker rod 5 no longer requires manual operation by workers, reducing labor intensity and improving work efficiency.

[0062] Depending on the different specifications of the sucker rod 5, the corresponding large bushing 6 and small bushing 7 can be replaced.

[0063] Among them, wellhead equipment can be wellhead crosses, wellhead blowout preventers, and other tubing threaded connection equipment.

[0064] All components not discussed in detail in this application, as well as the connection methods of these components, are well-known technologies in this field. They can be directly applied and will not be elaborated further.

[0065] In this utility model, the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0066] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0067] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0068] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An automated well workover sucker rod chuck for oilfields, comprising a base guide rail, wherein a slider opening and closing mechanism is slidably disposed on the base guide rail, the slider opening and closing mechanism comprising a first slider and a second slider that move in opposite directions, characterized in that, It also includes a hydraulic rod engaging device; The base guide rail, slider opening and closing mechanism, and oil rod locking device are axially connected. The hydraulic rod engaging device is divided into a female hydraulic rod engaging device and a male hydraulic rod engaging device through a stepped splicing joint. The female oil rod engaging device is located on the first slider, and the male oil rod engaging device is located on the second slider.

2. The oilfield automated well workover sucker rod chuck according to claim 1, characterized in that, The oil rod engaging device includes a first column and a large bushing. The large bushing is fixedly installed on the upper end of the first column, and the first column is installed on the upper end of the first slider. The master oil rod engaging device includes a second column and a small bushing. The small bushing is fixedly installed on the upper end of the second column, and the second column is installed on the upper end of the second slider. The first column and the second column are joined together to form a column by a first V-shaped angle, and the large bushing and the small bushing are joined together to form a limiting bushing by a second V-shaped angle; The first V-angle is larger than the second V-angle, forming a stepped joint between the limiting bushing and the column.

3. The oilfield automated well workover sucker rod chuck according to claim 2, characterized in that, The column is a through pipe, and the center of the limiting bushing is provided with a locking hole; The vertex of the first V-shaped angle coincides with the axis of the column; The vertex of the second V-angle is offset from the center of the engagement hole, and a guide groove is provided between the second V-angle of the large bushing and the engagement hole.

4. The oilfield automated well workover sucker rod chuck according to claim 3, characterized in that, The first V-angle is 90°-180°, the second V-angle is 60°-150°, and the first V-angle is larger than the second V-angle; The lines of symmetry of the first V-angle and the second V-angle coincide, and the lines of symmetry are parallel to the direction of slider movement. The first V-angle and the second V-angle face the same direction.

5. The oilfield automated well workover sucker rod chuck according to claim 4, characterized in that, Both the first slider and the second slider have anti-detachment grooves at the ends away from the through hole, and both ends of the base guide rail are connected to anti-detachment baffles, with protrusions extending into the anti-detachment grooves.

6. The oilfield automated well workover sucker rod chuck according to claim 5, characterized in that, The slider opening and closing mechanism also includes a driving device, and the first slider and the second slider are connected through the driving device; The driving device includes a hydraulic cylinder and a hydraulic rod, the hydraulic rod being slidably connected to the hydraulic cylinder. The hydraulic cylinder has a first hinge body at the end away from the hydraulic rod, and the hydraulic rod has a second hinge body at the end away from the hydraulic cylinder. The first slider has a first lug on its side wall, and the second slider has a second lug on its side wall, the first lug and the second lug being located on the same side. The first hinge body is hinged to the first lug, and the second hinge body is hinged to the second lug.

7. The oilfield automated well workover sucker rod chuck according to claim 6, characterized in that, The lower end of the base guide rail is connected to the oil pipe threaded seat, and the oil pipe threaded seat has a through hole in the center.

8. The oilfield automated well workover sucker rod chuck according to claim 7, characterized in that, The first slider has a first through groove at one end near the through hole, and the second slider has a second through groove at one end near the through hole. The first through groove and the second through groove are joined together to form a through hole, which covers the through hole. The through hole is an oblong hole.

9. The oilfield automated well workover sucker rod chuck according to claim 7, characterized in that, The base guide rail includes a base and two rails. The base is connected to the oil pipe thread seat by bolts. The two rails are distributed in parallel on the upper and lower sides of the upper end face of the base.

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