Fastening tool for crank pin of beam-pumping unit

Abstract

The utility model relates to a beam-pumping unit crank pin fastening tool, and relates to the field of oil and gas production lifting technology, the beam-pumping unit crank pin fastening tool comprises a tool main body, a connecting assembly used for being connected with a nut is arranged on the tool main body, and an oscillation assembly is arranged on one side of the tool main body; the force application direction of the oscillation assembly is staggered with the rotation center of the tool body. The large hammer has the effect that the potential safety hazard that field personnel are possibly injured in the operation of swinging the large hammer at a high position is avoided.

Description

A crank pin fastening tool for a beam pumping unit Technical Field

[0001] This application relates to the field of oil and gas production lifting technology, and in particular to a crank pin fastening tool for a walking beam pumping unit. Background Technology

[0002] Currently, beam pumping units frequently experience loosening or damage to their crank pins due to prolonged and heavy-duty operation. Replacing, disassembling, and tightening the crank pins is time-consuming and laborious, and involves swinging a sledgehammer from a height. To address this issue, tools such as socket wrenches have emerged, which have long lever arms and facilitate the removal of crown nuts. However, the aforementioned technologies and other related technologies used in the field still have shortcomings: when tightening crown nuts, the tool's torque is insufficient, still requiring a person to stand on the gearbox and swing a sledgehammer to apply torque while generating vibration to achieve a proper tightening. This necessitates setting up an operating platform on the gearbox, resulting in prolonged operation time and a safety hazard of falls from height.

[0003] Regarding the aforementioned technologies, the inventors believe that the existing technology of swinging a sledgehammer at height may injure on-site personnel or other equipment, posing safety hazards, reducing oil production rate, and affecting the normal production of oil wells. Summary of the Invention

[0004] To address the safety hazard of potentially injuring personnel during high-altitude sledgehammer operations, this application provides a crank pin fastening tool for a beam-type oil pumping unit.

[0005] The technical solution for a crank pin fastening tool for a beam pumping unit provided in this application is as follows:

[0006] A crank pin fastening tool for a walking beam pumping unit includes a tool body, a connecting assembly for connecting with a nut on the tool body, and an oscillation assembly on one side of the tool body, wherein the force direction of the oscillation assembly is offset from the rotation center of the tool body.

[0007] Optionally, the connecting assembly includes a groove formed on the side wall of the tool body. Multiple grooves are provided along the rotation direction of the tool body. A gap is left between two adjacent grooves to form a locking block. The protruding end of the nut is opposite to the groove and can extend into the groove. The locking block extends into the groove of the nut.

[0008] Optionally, the sidewall of the tool body is provided with a threaded hole horizontally relative to the groove, and the tool body is threadedly connected to the threaded hole with a set screw, the end of the set screw extending into the groove, and the set screw abutting against the sidewall of the nut.

[0009] Optionally, an insert is fixedly connected to the outer wall of the tool body. Multiple inserts are arranged along the circumference of the tool body. A torque wrench is provided on one side of the insert, and the torque wrench is connected to the insert.

[0010] Optionally, multiple set screws are provided, with at least one set screw located on both sides of the protruding end of one of the nuts.

[0011] Optionally, the end of the torque wrench is fixedly connected to a dovetail, and the outer side wall of the insert is provided with a dovetail groove, into which the dovetail can be inserted.

[0012] Optionally, the oscillation assembly includes a central rod connected to the main body, and an oscillating hammer is slidably connected to the side wall of the central rod.

[0013] Optionally, a limiting nut is fixedly connected to the center rod on the side of the vibrating hammer away from the tool body, and the limiting nut limits the movement range of the vibrating hammer.

[0014] Optionally, the center rod is opposite to the insert, and the insert is threadedly connected to the center rod.

[0015] Optionally, the side wall of the tool body is provided with weight reduction holes.

[0016] In summary, this application includes at least one of the following beneficial technical effects:

[0017] 1. Connecting component: This component connects the tool body to the nut. The vibration component strikes the connecting component, causing it to rotate and thus rotating the tool body to tighten or loosen the nut.

[0018] 2. The weight reduction hole can reduce the overall weight of the tool, and the torque wrench can ensure that the screws are tightened to the preset torque value, avoiding assembly problems caused by overtightening or loosening. Attached Figure Description

[0019] Figure 1 is a structural schematic diagram of a crank pin fastening tool for a walking beam pumping unit.

[0020] Figure 2 is a schematic diagram of the main structure of a crank pin fastening tool for a beam pumping unit.

[0021] Explanation of reference numerals in the attached drawings: 1. Tool body; 11. Main body; 12. Insert; 121. Groove; 122. Weight reduction hole; 123. Threaded hole; 2. Dovetail groove; 3. Set screw; 4. Torque wrench; 41. Dovetail; 5. Vibration assembly; 51. Center rod; 52. Vibration hammer; 53. Limit nut. Detailed Implementation

[0022] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0023] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0024] The present application will be further described in detail below with reference to Figures 1-2.

[0025] This application discloses a crank pin fastening tool for a walking beam pumping unit. Referring to Figures 1 and 2, the crank pin fastening tool for a walking beam pumping unit includes a tool body 1. The tool body 1 includes a central main body portion 11 and four inserts 12 equidistantly arranged circumferentially on the outer side wall of the main body portion 11. The inserts 12 are fixedly connected to the main body portion 11, and the inserts 12 and the main body portion 11 form a cross-shaped structure. The inserts 12 have grooves 121 relative to the protruding end of the crown nut, and the protruding end of the crown nut can extend into the grooves 121 of the inserts 12. A gap is left between two adjacent grooves 121, and a locking block is provided at the gap, which is fixedly connected to the groove 121. An oscillation assembly 5 is provided on the side of the tool body 11, and the oscillation assembly 5 is connected to the tool body 1.

[0026] The surface of the insert 12 is provided with weight reduction holes 122, which are perpendicular to the insert 12. There are 8 weight reduction holes 122, which are evenly distributed on the four inserts 12. The weight reduction holes 122 communicate with the grooves 121 of the insert 12. The weight reduction holes 122 are used to reduce the overall weight of the tool body 1.

[0027] The insert 12 has a threaded hole 123 horizontally arranged on its surface. The threaded hole 123 penetrates the side of the insert 12 and communicates with the groove 121 inside the insert 12. The threaded holes 123 at both ends of the insert 12 are arranged opposite to each other. A set screw 3 is horizontally arranged inside the threaded hole 123 and is threadedly connected to the insert 12 through the threaded hole 123.

[0028] When the tool body 1 is installed on the crown nut, the width of the groove 121 inside the insert 12 is greater than the width of the protruding end at the top of the crown nut, which is beneficial for adapting to the width of the protruding end at the top of various crown nuts. The set screw 3 passes through the threaded hole 123 and presses against the protruding end at the top of the crown nut, so that the inner side of the insert 12 is tightly connected to the side of the crown nut.

[0029] A torque wrench 4 is provided on the outer side of the insert 12. A dovetail 41 is fixedly provided on the torque wrench 4. Each of the four inserts 12 has a dovetail groove 2 on the side away from the main body 11. The dovetail 41 on the torque wrench 4 can be installed in the dovetail groove 2, so that the torque wrench 4 is connected to the tool body 1. The axis of the torque wrench 4 is set opposite to the rotation center of the tool body 1. The torque wrench 4 is used to apply rotational torque to the tool body 1.

[0030] The oscillation assembly 5 includes a central rod 51, which is horizontally positioned and cylindrical. Both ends of the central rod 51 are provided with threaded structures. The threaded structure at one end of the central rod 51 can be threadedly connected to the threaded hole 123 on the insert 12.

[0031] A limiting nut 53 is provided at the other end of the center rod 51 away from the tool body 1. The limiting nut 53 is installed on the threaded structure at the end of the center rod 51 away from the tool body 1, and the limiting nut 53 is threadedly connected to the center rod 51.

[0032] A vibrating hammer 52 is fitted onto the outer wall of the central rod 51, and the vibrating hammer 52 is slidably connected to the central rod 51. The outer diameter of the limiting nut 53 is larger than the outer diameter of the central rod 51, and the outer diameter of the limiting nut 53 is larger than the inner diameter of the vibrating hammer 52, so that the limiting nut 53 and the vibrating hammer 52 at least partially overlap along the horizontal mirror projection direction. When the vibrating hammer 52 is working, the limiting nut 53 can prevent the vibrating hammer 52 from sliding out of the central rod 51, ensuring that the vibrating hammer 52 moves on the central rod 51. The direction of force applied by the vibration assembly 5 is offset from the rotation center of the tool body 1.

[0033] During operation, the tool body 1 is first installed on the crown nut, so that the protruding end of the crown nut is deeply inserted into the groove 121 of the insert 12. The set screw 3 is rotated into the threaded hole 123, and the end of the set screw 3 extends into the groove 121 of the insert 12 and abuts against the side wall of the protruding end of the crown nut. The tool body 1 is then fixed on the crown nut. The torque wrench 4 is fixed on the insert 12 through the dovetail groove 2. Then, the thread of one end of the center rod 51 is installed on the insert 12 through the threaded hole 123. The oscillating hammer 52 is installed on the center rod 51. The limit nut 53 is installed on the center rod 51 through the thread of the other end of the center rod 51. Finally, the oscillating hammer 52 is activated to strike the insert 12, applying a rotational force to the tool body 1 and causing the tool body 1 to rotate. The tool body 1 tightens and loosens the crown nut of the crank pin.

[0034] In this application, the term "multiple" refers to at least two or more, unless otherwise expressly defined. The terms "installed," "connected," "linked," and "fixed," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "linked" 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 invention according to the specific circumstances.

[0035] 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.

Claims

1. A crank pin fastening tool for a walking beam pumping unit, characterized in that: It includes a tool body (1), on which a connecting component for connecting with a nut is provided, and an oscillation component (5) is provided on one side of the tool body (1), the force direction of the oscillation component (5) being offset from the rotation center of the tool body (1).

2. The crank pin fastening tool for a beam pumping unit according to claim 1, characterized in that: The connecting assembly includes a groove (121) formed on the side wall of the tool body (1). Multiple grooves (121) are provided along the rotation direction of the tool body (1). A gap is left between two adjacent grooves (121) to form a locking block. The protruding end of the nut is opposite to the groove (121). The protruding end of the nut can extend into the groove (121). The locking block extends into the groove (121) of the nut.

3. The crank pin fastening tool for a beam pumping unit according to claim 2, characterized in that: The side wall of the tool body (1) is horizontally provided with a threaded hole (123) relative to the groove (121). The tool body (1) is threadedly connected with a set screw (3) relative to the threaded hole (123). The end of the set screw (3) extends into the groove (121) and abuts against the side wall of the nut.

4. The crank pin fastening tool for a beam pumping unit according to claim 2, characterized in that: An insert (12) is fixedly connected to the outer wall of the tool body (1). Multiple inserts (12) are arranged along the circumference of the tool body (1). A torque wrench (4) is arranged on one side of the insert (12). The torque wrench (4) is connected to the insert (12).

5. The crank pin fastening tool for a beam pumping unit according to claim 3, characterized in that: Multiple set screws (3) are provided, and the multiple set screws (3) are located on both sides of the protruding end of at least one of the nuts.

6. The crank pin fastening tool for a beam pumping unit according to claim 4, characterized in that: The end of the torque wrench (4) is fixedly connected to a dovetail (41), and the outer side wall of the insert (12) is provided with a dovetail groove (2), and the dovetail (41) can be inserted into the dovetail groove (2).

7. The crank pin fastening tool for a beam pumping unit according to claim 4, characterized in that: The oscillation assembly (5) includes a central rod (51), which is connected to the tool body (1), and an oscillating hammer (52) is slidably connected to the side wall of the central rod (51).

8. The crank pin fastening tool for a beam pumping unit according to claim 7, characterized in that: The central rod (51) is fixedly connected to a limiting nut (53) on the side of the vibrating hammer (52) away from the tool body (1), and the limiting nut (53) limits the movement range of the vibrating hammer (52).

9. The crank pin fastening tool for a beam pumping unit according to claim 7, characterized in that: The center rod (51) is opposite to the insert (12), and the insert (12) is threadedly connected to the center rod (51).

10. The crank pin fastening tool for a beam pumping unit according to claim 1, characterized in that: The side wall of the tool body (1) is provided with a weight reduction hole (122).

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