A device and method for removing crank pin assembly from an oil pumping unit

Abstract

This application relates to a device and method for removing a crank pin assembly from a pumping unit. The device includes: an installation assembly for installing a connecting assembly and an ejection assembly; a connecting assembly for connecting a crank and the installation assembly; the connecting assembly is disposed on the installation assembly and connected to the crank; and an ejection assembly for ejecting the crank pin assembly from the crank; the ejection assembly is disposed on the installation assembly and directly opposite the crank pin assembly. In practical use, this pumping unit crank pin assembly removal device replaces the traditional method of hammering the crank pin with a hydraulic jack, reducing the intensity of personnel operation and safety risks. Simultaneously, the removal device is securely connected to the crank with bolts, and the jack is placed inside a fixed cylinder, eliminating the risk of workpiece falling and injuring people. Furthermore, the jack and the crank pin are on the same axis, ensuring uniform force on the crank pin and reducing jamming caused by uneven force distribution.

Description

Technical Field

[0001] This application relates to the field of oil production technology in the petroleum industry, specifically to a device and method for removing crank pin assemblies from oil pumping units. Background Technology

[0002] The walking beam pumping unit is a widely used surface pumping equipment in major oilfields. It consists of components such as the head, walking beam, crank, connecting rod, counterweight, and gearbox. The crank pin assembly of the pumping unit is mainly responsible for connecting the crank and connecting rod and transmitting power. It consists of crank pins, assembly seats, bearings, and other parts. Because the pumping unit is a high-load operating device, to prevent the crank pins from loosening and unscrewing during operation, the two crank pins are respectively set as forward and reverse threads, with their rotation direction opposite to the crank rotation direction. This ensures that the crank pins tighten as they are turned during operation.

[0003] Crankpin assemblies are non-consumable parts, typically with a service life of 3-5 years. Their long-term stable connection makes disassembly difficult once damaged. Currently, the common method is for workers to stand inside the pumping unit and use a sledgehammer to hammer the crankpin assembly outwards. However, this area contains supports, gearboxes, and other equipment. Due to the fixed positions of these devices, the operator's sledgehammer stroke is limited, requiring only short strokes, making the operation difficult and posing safety risks. Disassembling a single crankpin assembly typically requires 6 workers and takes 2-6 hours, increasing the time spent on well maintenance, the risk of lying in the well, and significant safety hazards for personnel during the operation.

[0004] Chinese utility model patent 201520114355.3 discloses a single-axis, double-force crank pin extractor, which consists of an impact head, a central shaft, an impact hammer, a rubber pad, a threaded connection, a tail fin, and a chain. The single-axis, double-force crank pin extractor has a cylindrical rod structure. The impact hammer and rubber pad are sequentially fitted onto the central shaft from left to right. The left end of the central shaft is inserted into the impact head, and the left and right ends are connected to the tail fin via positive and negative threaded connections. The two ends of the chain are connected to the tail fin and the centering rod of the impact head, respectively. This allows the crank pin to be subjected to an increasing upward force while simultaneously being subjected to the inertial force of the impact hammer, enabling safe and rapid removal of the crank pin from the crank bushing.

[0005] Chinese utility model patent 201320720299.9 discloses a crank pin support frame for an oil pumping unit. The device includes an auxiliary sleeve, a working rod, a nut, a sliding hammer, a disc, a cylinder, a handle, a spring, a base, and a bracket. In use, the base is first fixed to the oil pumping unit. The tightening nut is then rotated to press against the nut, fixing its position. The adjusting bolt is then adjusted to align the center line of the auxiliary sleeve with the center line of the crank pin. Rotating the handle then rotates the working rod and auxiliary sleeve, pushing the crank pin out. If the crank pin is stubborn, the sliding hammer is repeatedly moved and struck against the auxiliary sleeve to loosen the crank pin before it is pushed out.

[0006] The two patents mentioned above indicate that removing the crank pin assembly of the pumping unit is a common maintenance operation for various beam pumping units, and it is often done by impact. However, due to the limited operating space at the pumping unit's gearbox, the devices provided by the two patents cannot guarantee that personnel are always in a safe state during the operation, which poses certain safety hazards. Summary of the Invention

[0007] In order to solve the above-mentioned technical problems, or at least partially solve the above-mentioned technical problems, this application provides a device for removing the crank pin assembly of an oil pumping unit.

[0008] In a first aspect, this application provides a device for removing a crank pin assembly from an oil pumping unit, comprising:

[0009] Installing components are used to install connecting components and ejecting components;

[0010] A connecting component for connecting the crank and the mounting component; the connecting component is disposed on the mounting component and connected to the crank;

[0011] An ejector assembly is provided for ejecting the crank pin assembly on the crank; the ejector assembly is disposed on the mounting assembly and is directly opposite the crank pin assembly.

[0012] Optionally, the mounting assembly includes an upper upright plate, a lower upright plate, and a connecting plate, wherein the lower part of the upper upright plate and the upper part of the lower upright plate are respectively connected to both ends of the connecting plate, the connecting assembly is disposed at the lower part of the lower upright plate, and the ejection assembly is disposed at the upper part of the upper upright plate.

[0013] Optionally, the mounting assembly further includes a support plate, wherein the sides of the upper plate, the lower plate, and the connecting plate are respectively connected to the end faces of the support plate.

[0014] Optionally, the connecting assembly includes: a bolt, a fixing sleeve, a positioning plate, and a fastening nut, wherein the positioning plate is disposed in the crank pin hole on the crank, the fixing sleeve is inserted into the crank pin hole, and the bolt passes through the fixing sleeve, the positioning plate, and the lower upright plate in the mounting assembly in sequence, and is fastened to the fastening nut.

[0015] Optionally, the retaining sleeve includes a clamping part and an insertion part, wherein the insertion part is inserted into the crank pin hole, the front end face of the clamping part abuts against the bolt and the rear end face abuts against the outer side of the crank.

[0016] Optionally, the fixing sleeve further includes a through hole, the through hole passing through the abutment and the insertion part, the bolt passing through the abutment and the insertion part in sequence via the through hole.

[0017] Optionally, the bolt has a shaped head at its end, and the front end face of the clamping part has a groove, with the shaped head correspondingly disposed in the groove.

[0018] Optionally, the ejection assembly includes a hydraulic jack, an ejection screw, and a tightening nut, wherein the ejection screw passes through the upper plate in the mounting assembly and is fastened to the tightening nut, and the hydraulic jack is disposed on the ejection screw and is directly opposite the crank pin assembly.

[0019] Optionally, the ejector screw includes a threaded rod and a fixed seat, the hydraulic jack is disposed in the fixed seat, the threaded rod is connected to the fixed seat and is fastened to the tightening nut.

[0020] Secondly, this application also provides a method for removing a pumping unit crank pin assembly, implemented using the pumping unit crank pin assembly removal device as described in the first aspect above, the method comprising the steps of:

[0021] Remove the crown nut from the crank pin assembly to be removed;

[0022] Install the ejector component and the connecting component onto the mounting component respectively;

[0023] Keep the ejector assembly and the crank pin assembly facing each other;

[0024] Connect the connecting assembly to the crank;

[0025] Operate the ejector assembly to eject the crank pin assembly on the crank.

[0026] One or more technical solutions in the embodiments of this application have at least the following technical effects or advantages:

[0027] This application provides a device and method for removing crank pin assemblies from oil pumping units. In practical use, this device replaces the traditional method of hammering the crank pin with a hydraulic jack, reducing the intensity of personnel operation and safety risks. At the same time, the device is firmly connected to the crank with bolts, and the jack is placed in a fixed cylinder, eliminating the risk of workpiece falling and injuring people. Moreover, the jack and the crank pin are on the same axis, ensuring that the crank pin is subjected to uniform force, reducing the jamming phenomenon caused by uneven force on the crank pin. Attached Figure Description

[0028] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the usage state of a pumping unit crank pin assembly removal device provided in an embodiment of this application;

[0031] Figure 2 This is a schematic diagram of the oil pumping unit crank pin assembly installed on the crank provided in the embodiments of this application;

[0032] Figure 3 This is a schematic diagram of the structure of a crank pin assembly removal device for an oil pumping unit provided in an embodiment of this application;

[0033] Figure 4 This is a schematic diagram of the installation components in a crank pin assembly removal device for an oil pumping unit, provided in an embodiment of this application.

[0034] Figure 5 This is a schematic diagram of the connecting component in a crank pin assembly removal device for an oil pumping unit, provided in an embodiment of this application.

[0035] Figure 6 This is a schematic diagram of the ejection component in a crank pin assembly removal device for an oil pumping unit, provided in an embodiment of this application.

[0036] Figure 7 This is a flowchart illustrating a method for removing a crank pin assembly from an oil pumping unit, as provided in an embodiment of this application.

[0037] Figure label:

[0038] 1: Crankshaft; 2: Crankshaft pin hole; 3: Crankshaft pin assembly; 4: Mounting assembly; 5: Connecting assembly; 6: Ejector assembly; 7: Crown nut;

[0039] 41: Upper plate; 42: Threaded hole; 43: Support plate; 44: Connecting plate; 46: Lower plate; 45: Smooth hole;

[0040] 51: Bolt; 52: Fixing sleeve; 53: Positioning plate; 54: Fastening nut;

[0041] 511: Irregular head; 512: Connecting end; 513: Screw;

[0042] 521: Groove; 522: Through hole; 523: Pressing part; 524: Insertion part;

[0043] 61: Hydraulic jack; 62: Push out screw; 63: Tighten nut;

[0044] 621: Fixed base; 622: Threaded rod; 623: Square head. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0046] like Figure 1-6 In this embodiment of the application, the present invention provides a device for removing a crank pin assembly from an oil pumping unit, comprising:

[0047] Installing component 4 is used to install connecting component 5 and ejecting component 6;

[0048] A connecting component 5 is used to connect the crank 1 and the mounting component 4; the connecting component 5 is disposed on the mounting component 4 and connected to the crank 1.

[0049] Ejector assembly 6 is used to eject the crank pin assembly 3 on the crank 1; the ejector assembly 6 is disposed on the mounting assembly 4 and is directly opposite the crank pin assembly 3.

[0050] When using this oil pump crank pin assembly removal device, first remove the crown nut 7 on the crank pin assembly 3 to be removed, then install the ejector assembly 6 and the connecting assembly 5 on the mounting assembly 4 respectively, keeping the ejector assembly 6 and the crank pin assembly 3 facing each other, then connect the connecting assembly 5 to the crank 1, and finally operate the ejector assembly 6 to eject the crank pin assembly 3 on the crank 1.

[0051] Specifically, since the device uses a connecting component 5 to connect the mounting component 4 to the crank 1, it can ensure that the entire device is connected to the crank 1 and that the ejector component 6 is directly opposite the crank pin assembly 3, so that the ejector component 6 can accurately act on the crank pin assembly 3 to eject it. On the other hand, it can ensure that when the ejector component 6 ejects the crank pin assembly 3, the entire device will not detach from the crank 1, ensuring that the ejector component 6 can continuously act on the crank pin assembly 3, thus ensuring the stability of the ejection operation.

[0052] Specifically, since the crank pin assembly 3 is ejected by the ejector assembly 6, there is no need to manually hammer the crank pin assembly 3, which reduces the danger of the entire process and improves the controllability of the ejection operation.

[0053] In this embodiment of the application, the mounting component 4 includes: an upper upright plate 41, a lower upright plate 46, and a connecting plate 44, wherein the lower part of the upper upright plate 41 and the upper part of the lower upright plate 46 are respectively connected to both ends of the connecting plate 44, the connecting component 5 is disposed at the lower part of the lower upright plate 46, and the ejection component 6 is disposed at the upper part of the upper upright plate 41.

[0054] Specifically, the side section of the mounting component 4 is a vertically placed "U"-shaped steel plate structure, the connecting component 5 is connected to the lower part of the lower plate 46 by bolts, and the center lines of the two are perpendicular; the ejection component 6 is connected to the upper part of the upper plate 41 by bolts, and the center lines of the two are perpendicular.

[0055] In this embodiment of the application, the mounting component 4 further includes a support plate 43, wherein the sides of the upper upright plate 41, the lower upright plate 46 and the connecting plate 44 are respectively connected to the end face of the support plate 43.

[0056] Specifically, by using the support plate 43, the upper plate 41, the lower plate 46, and the connecting plate 44 can be formed into a complete integrated structure, which enhances the stability of the connection between the three.

[0057] Specifically, the mounting assembly 4 consists of an upper plate 41, a threaded hole 42, a support plate 43, a connecting plate 44, a lower plate 46, and a clear hole 45. The threaded hole 42 is located on the upper plate 41, and the clear hole 45 is located on the lower plate 46.

[0058] Optionally, the mounting assembly 4 has a total height of 330mm and is vertically welded together from three 20mm thick 45# medium carbon steel plates arranged in a vertical "U" shape. The upper plate 41 is 170mm long and 150mm wide, with a Φ52mm threaded hole 42 at its center position 75mm from its top. The lower plate 46 is 180mm long and 150mm wide, with a Φ31mm clear hole 45 at its center position 105mm from its top. The connecting plate 44 is 90mm long and 150mm wide, and is vertically welded to the lower part of the upper plate 41 and the upper part of the lower plate 46. The support plate 43 is made of two 45# medium carbon steel plates of the same size and 10mm thickness. The support plate 43 is machined into an irregular hexagon. The two middle long sides of the hexagon are the same as the upper upright plate 41 and the lower upright plate 46. The two support plates are welded to both sides of the vertically placed mounting component 4. The two middle long side end faces of the support plate 43 are on the same plane as the rear end face of the upper upright plate 41 and the front end face of the lower upright plate 46, respectively.

[0059] Optionally, the support plate 43 of the mounting assembly 4 can also be configured as a right-angled triangle, with its two right-angled sides welded perpendicularly to the upper plate 41 and the connecting plate 44 respectively, and on the same plane as the back of the upper plate 41 and the bottom surface of the connecting plate 44.

[0060] Optionally, the support plate 43 of the mounting assembly 4 can also be configured as an inverted right triangle, with its two right-angled sides welded perpendicularly to the lower upright plate 46 and the connecting plate 44 respectively, and on the same plane as the front of the upper upright plate 46 and the bottom surface of the connecting plate 44.

[0061] In this embodiment, the connecting component 5 includes: a bolt 51, a fixing sleeve 52, a positioning plate 53, and a fastening nut 54. The positioning plate 53 is disposed in the crank pin hole 2 on the crank 1, the fixing sleeve 52 is inserted into the crank pin hole 2, and the bolt 51 passes through the fixing sleeve 52, the positioning plate 53, and the lower upright plate 46 in the mounting component 4 in sequence, and is fastened to the fastening nut 54.

[0062] Specifically, the bolt 51, fixing sleeve 52, positioning plate 53 and fastening nut 54 can be disassembled and combined to form a connecting assembly 5. When a suitable crank pin hole 2 is selected on the crank 1, the bolt 51, fixing sleeve 52, positioning plate 53 and fastening nut 54 can be combined to form the connecting assembly 5, thereby connecting the mounting assembly 4 and the crank 1 into a solid integrated structure, which is highly convenient and easy to use.

[0063] In this embodiment of the application, the fixing sleeve 52 includes a clamping part 523 and an insertion part 524, wherein the insertion part 524 is inserted into the crank pin hole 2, the front end face of the clamping part 523 abuts against the bolt 51 and the rear end face abuts against the outer side of the crank 1.

[0064] Specifically, the diameter of the positioning plate 53 is the same as the diameter of the crank pin hole 2, and it is fastened to the hollow part of the crank pin hole 2. The insertion part 524 is used to insert into the crank pin hole 2, while the abutting part 523 protrudes from the crank pin hole 2 and cannot enter the crank pin hole 2 because its diameter is larger than the diameter of the crank pin hole 2. This ensures that the bolt 51 cannot enter the crank pin hole 2, thereby ensuring a stable connection of the connecting assembly 5 on the crank 1.

[0065] In this embodiment of the application, the fixing sleeve 52 further includes a through hole 522, which passes through the abutting part 523 and the insertion part 524, and the bolt 51 passes through the abutting part 523 and the insertion part 524 in sequence via the through hole 522.

[0066] Specifically, the through hole 522 is used for the bolt 51 to pass through, and its inner wall can be threaded to enhance the stability of the threaded connection between the bolt 51 and the fixing sleeve 52.

[0067] In this embodiment of the application, the end of the bolt 51 is provided with a shaped head 511, and the front end face of the clamping part 523 is provided with a groove 521, and the shaped head 511 is correspondingly disposed in the groove 521.

[0068] Specifically, the groove 521 is used to maintain the stability of the irregular head 511 in its recessed part, prevent it from shaking on the fixing sleeve 52, and thus provide a structural guarantee for the stable connection of the connecting assembly 5.

[0069] Optionally, the bolt 51 is made of 45# medium carbon steel, and the irregular head 511 is a cylindrical body with a diameter of 88mm that is machined into an irregular structure with a thickness of 15mm and a width of 45mm. The lower part of the irregular head 511 is machined into a cylindrical structure with a diameter of 58mm and a length of 40mm, and the connecting end 512 is connected to a screw 513 with a diameter of 30mm and a partially smooth rod.

[0070] Optionally, the fixing sleeve 52 is made of 45# medium carbon steel and consists of a 14mm thick, 148mm Φ148mm pressing part 523, a 20mm thick, 128mm Φ128mm insertion part 524, a groove 521 521 on the front end face of the pressing part 523, and a Φ60mm through hole 522 penetrating the large and small cylinders.

[0071] Optionally, the center of the end face of the clamping part 523 is provided with an irregular groove 521, which is 50mm wide and 14mm deep, and the two ends of the arc-shaped groove are Φ90mm. The clamping part 523 is symmetrically machined with a flat surface at 65mm along the center line in the long opening direction of the irregular groove. The insertion part 524 is 20mm thick and Φ128mm, and one end is connected to the clamping part 523; the through hole 522 penetrates the large and small cylinders and has a size of Φ60mm.

[0072] Optionally, the positioning plate 53 is made of 45# medium carbon steel, and is a circular plate structure with a thickness of 12mm and a diameter of 128mm, with a 30mm threaded through hole 522 in the middle.

[0073] Optionally, the positioning plate 53 can also be configured as a square plate with arc-shaped ends and a Φ30mm threaded through hole 522 in the middle.

[0074] Optionally, the fastening nut 54 has a Φ30mm hexagonal internal thread structure and is made of 45# medium carbon steel.

[0075] Optionally, the fastening nut 54 can also be a square internal thread structure with a diameter of 30mm.

[0076] In this embodiment of the application, the ejector assembly 6 includes a hydraulic jack 61, an ejector screw 62, and a tightening nut 63. The ejector screw 62 passes through the upper plate 41 in the mounting assembly 4 and is fastened to the tightening nut 63. The hydraulic jack 61 is disposed on the ejector screw 62 and is directly opposite to the crank pin assembly 3.

[0077] Specifically, by setting the ejector screw 62 and the tightening nut 63, the distance between the hydraulic jack 61 and the crank pin assembly 3 can be adjusted according to actual needs, which is highly flexible.

[0078] In this embodiment, the ejector screw 62 includes a threaded rod 622 and a fixed base 621. The hydraulic jack 61 is disposed in the fixed base 621. The threaded rod 622 is connected to the fixed base 621 and is fastened to the tightening nut 63.

[0079] Specifically, the ejector screw 62 consists of a fixed base 621, a threaded rod 622, and a square head 623. The fixed base 621 is used to install the hydraulic jack 61, and the appropriate hydraulic jack 61 can be selected or replaced as needed, which is convenient.

[0080] Optionally, depending on the force requirements of the crank pin assembly 3, the hydraulic jack 61 is a short type of 10-30 ton hydraulic jack, which can meet the installation and use in confined spaces.

[0081] Optionally, the fixing seat 621 is made of 45# medium carbon steel, has a cylindrical structure, and a wall thickness of 2mm. The inner diameter of the cylinder is set according to the outer diameter of the hydraulic jack 61. The bottom of the cylinder is welded to one end of the threaded rod 622. The threaded rod 622 is made of Φ52mm 45# medium carbon steel. The other end of the threaded rod 622 is machined into a square head 623, and the diagonal length of the end face of the square head is less than 50mm.

[0082] Optionally, the shape of the cylindrical fixing seat 621 can be set according to the shape of the base of the hydraulic jack 61.

[0083] Optionally, the square head 623 can be configured as a regular hexagon or a rectangle, with the length of its end face diagonal less than 50mm.

[0084] Optionally, the tightening nut 63 has a Φ52mm hexagonal internal thread structure and is made of 45# medium carbon steel.

[0085] Optionally, the tightening nut 63 may be a square internal thread structure with a diameter of 52mm.

[0086] Specifically, the usage process of this oil pump crank pin assembly removal device is as follows:

[0087] Step 1: Remove the crown nut 7 used to fasten crankpin assembly 3 (see...) Figure 2 );

[0088] Step 2: Attach the mounting component 4 from the oil pump crank pin assembly removal device to the back of the crank 1, and adjust the position of the mounting component 4 so that the center line of the crank pin assembly 3 to be removed coincides with the center line of the threaded hole 42 of the upper plate 41.

[0089] Step 3: Place the positioning plate 53 into the interior of the adjacent crank pin hole 2 of the crank pin assembly 3;

[0090] Step 4: Insert the insertion part 524 of the fixing sleeve 52 inward into the crank pin hole 2 that has been placed in the positioning plate 53;

[0091] Step 5: Pass the screw 51 through the fixing sleeve 52, and then rotate it through the light hole 45 at the bottom of the positioning plate 53 and the lower upright plate 46. Adjust the direction of the irregular head 511 of the screw 51 to be in the same direction as the groove 521 of the fixing sleeve 52 and push it inward so that the screw 51 lies in the groove 521 of the fixing sleeve 52.

[0092] Step 6: Screw the fastening nut 54 into the screw 51 to fix the crank 1 and the mounting assembly 4 together by tightening the fastening nut 54;

[0093] Step 7: Screw the ejector screw 62 from front to back through the threaded hole 42 of the upper plate 41 from the square head 623 end. Place the hydraulic jack 61 into the fixed seat 621. Adjust the position of the ejector screw 62 so that the distance between the force-generating end face of the hydraulic jack 61 and the force-bearing end face of the crank pin assembly 3 is within 5mm. Screw the tightening nut 63 into the ejector screw 62 until the tightening nut 63 is tightly against the back of the upper plate 41.

[0094] Step 8: Operate the manual pump connected to the hydraulic jack 61 to input hydraulic oil into the hydraulic jack 61 through a 3-4 meter long hydraulic pipe, so that its plunger applies force to the crank pin assembly 3. During the application of force, observe the pressure while operating (the pressure should not exceed the maximum lifting capacity of the jack) until the crank pin assembly 3 is disengaged by force.

[0095] like Figure 7 Based on a general inventive concept, this invention also provides a method for removing the crank pin assembly of an oil pumping unit, the method comprising the steps of:

[0096] S1: Remove the crown nut from the crank pin assembly to be removed;

[0097] S2: Install the ejector component and the connecting component onto the mounting component respectively;

[0098] S3: Keep the ejector assembly and the crank pin assembly facing each other;

[0099] S4: Connect the connecting assembly to the crank;

[0100] S5: Operate the ejector assembly to eject the crank pin assembly on the crank.

[0101] This method is based on the above-mentioned pumping unit crank pin assembly removal device. The specific structure of the pumping unit crank pin assembly removal device is as described in the above embodiments. Since this method adopts some or all of the technical solutions of the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated here.

[0102] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0103] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A sucker rod pump unit crank pin assembly extractor, comprising: include: Installation components are used to install connection components and ejection components; A connecting component for connecting the crank and the mounting component; The connecting component is disposed on the mounting component and connected to the crank; Ejector assembly for ejecting the crank pin assembly on the crank; The ejector assembly is disposed on the mounting assembly and is directly opposite the crank pin assembly; The mounting assembly includes an upper plate, a lower plate, and a connecting plate, wherein the lower part of the upper plate and the upper part of the lower plate are respectively connected to both ends of the connecting plate, the connecting assembly is disposed at the lower part of the lower plate, and the ejection assembly is disposed at the upper part of the upper plate. The mounting assembly further includes a support plate, wherein the sides of the upper upright plate, the lower upright plate, and the connecting plate are respectively connected to the end face of the support plate; The connecting assembly includes: a bolt, a fixing sleeve, a positioning plate, and a fastening nut, wherein the positioning plate is disposed in the crank pin hole on the crank, the fixing sleeve is inserted into the crank pin hole, and the bolt passes through the fixing sleeve, the positioning plate, and the lower upright plate in the mounting assembly in sequence, and is fastened to the fastening nut. The fixing sleeve includes a clamping part and an insertion part, wherein the insertion part is inserted into the crank pin hole, the front end face of the clamping part abuts against the bolt and the rear end face abuts against the outer side of the crank; The fixing sleeve further includes a through hole, which passes through the abutting part and the insertion part, and the bolt passes through the abutting part and the insertion part in sequence via the through hole.

2. The oil pump crank pin assembly removal device according to claim 1, characterized in that, The bolt has a shaped head at its end, and the front end face of the clamping part has a groove, with the shaped head correspondingly disposed in the groove.

3. The oil pump crank pin assembly removal device according to claim 1, characterized in that, The ejection assembly includes a hydraulic jack, an ejection screw, and a tightening nut. The ejection screw passes through the upper plate of the mounting assembly and is fastened to the tightening nut. The hydraulic jack is mounted on the ejection screw and is directly opposite the crank pin assembly.

4. The oil pumping unit crank pin assembly removal device according to claim 3, characterized in that, The ejector screw includes a threaded rod and a fixed base. The hydraulic jack is disposed in the fixed base. The threaded rod is connected to the fixed base and is also securely connected to the tightening nut.

5. A method for removing the crank pin assembly of an oil pumping unit, characterized in that, This is achieved using the pumping unit crank pin assembly removal device as described in any one of claims 1-4, the method comprising the steps of: Remove the crown nut from the crank pin assembly to be removed; Install the ejector component and the connecting component onto the mounting component respectively; Keep the ejector assembly and the crank pin assembly facing each other; Connect the connecting assembly to the crank; Operate the ejector assembly to eject the crank pin assembly on the crank.

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