A guide hydraulic pumping rod hoisting barrel

Abstract

The utility model belongs to oilfield drilling mechanical equipment technical field, concretely relates to a kind of guide hydraulic pumping unit hanger barrel, including cylinder and the guide disc of the bottom end of cylinder integrated, the rectangular through-hole being formed on the lateral wall of cylinder, rectangular through-hole is equipped with square card, the middle part of square card is equipped with the slot, the arc-shaped guide surface being equipped with in the both sides bottom of slot, the inside bottom of cylinder and located the two inclined surface guide blocks being fixed with just below rectangular through-hole, guide disc, inclined surface guide block and arc-shaped guide surface are sequentially arranged from lower to upper along pumping unit axial direction and the guide surface of three is mutually linked in space, form continuous guide surface.The utility model has ensured the continuity and accuracy of pumping unit in guide-in process, effectively corrects alignment deviation, solves the failure or collision of clamping due to deviation, greatly reduces artificial adjustment frequency, realizes the quick, accurate guide-in of pumping unit, significantly improves operation efficiency and automation level.

Description

Technical Field

[0001] This utility model belongs to the technical field of oilfield drilling machinery and equipment, and specifically relates to a guide hydraulic sucker rod lifting cylinder. Background Technology

[0002] In oilfield well workover operations, the raising and lowering of sucker rods is a crucial step in ensuring normal oil and gas well production. In traditional operations, this process heavily relies on manual operation by personnel at the wellhead. This requires workers to spend long hours monitoring the area around the wellhead, repeatedly performing actions such as aligning, clamping, and transferring the sucker rods, resulting in extremely high labor intensity. Furthermore, workers face safety risks such as potential oil and gas leaks and mechanical collisions in the wellhead area, making personnel safety a significant challenge.

[0003] Existing technologies include research aimed at achieving automated and unmanned wellhead operations. For example, Chinese patent CN113047785A discloses a hydraulic sucker rod lifting cylinder, which comprises a lifting cylinder body, a flipping mechanism, a rotating mechanism, and a square clamping mechanism. This enables automatic clamping and flipping of the sucker rod, improving the level of automation to some extent. However, existing hydraulic sucker rod lifting cylinders lack a continuous and precise guiding structure during sucker rod insertion, making them prone to clamping failure due to alignment deviations. This necessitates repeated manual adjustments, impacting operational efficiency. Furthermore, the clamping components of existing hydraulic sucker rod lifting cylinders are complex to replace, have poor adaptability, and are difficult to quickly switch to meet diverse operational needs. Therefore, a new technical solution is needed to address these technical problems. Utility Model Content

[0004] The purpose of this utility model is to provide a guide hydraulic sucker rod lifting cylinder to solve the problems mentioned in the background art, such as the lack of a continuous and precise guide structure in the current hydraulic sucker rod lifting cylinder during the sucker rod introduction process, the easy failure of clamping due to alignment deviation, the need for repeated manual adjustment, which affects the work efficiency, and the complexity of replacing the clamping components of the existing hydraulic sucker rod lifting cylinder, poor adaptability, and difficulty in quickly switching to meet diverse work needs.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a guide hydraulic sucker rod cylinder, comprising a hollow cylindrical body with its axis arranged vertically, a frustum-shaped guide disc integrally formed at the bottom end of the cylinder, a rectangular through hole radially extending from the side wall of the cylinder and with its long side axially arranged, a square clip that can slide radially within the rectangular through hole, the shape of the square clip matching the rectangular through hole, a slot for holding the sucker rod in the middle of the square clip, an arc-shaped guide surface on each side bottom of the slot along the width direction of the square clip, two opposing inclined guide blocks fixed at the bottom inner side of the cylinder and directly below the rectangular through hole, the guide disc, inclined guide blocks and arc-shaped guide surfaces arranged sequentially from bottom to top along the axial direction of the sucker rod and the guide surfaces of the three are spatially connected to each other, forming a continuous guide surface extending from the bottom of the guide disc to the arc-shaped guide surface.

[0006] Furthermore, a hydraulic cylinder is fixed on each of the opposite sides of the cylinder. The piston rods of the two hydraulic cylinders are arranged radially opposite to each other along the cylinder and are fixedly connected to a U-shaped plate. The middle part of the U-shaped plate is fixedly connected to the end side of the square card. The cylinder body of the hydraulic cylinder is fixed to the side wall of the cylinder by an ear seat. An ear hole is opened on the ear seat. The piston rod of the hydraulic cylinder passes through the ear hole and its end is fixedly connected to the U-shaped plate. A through hole is opened in the middle of the U-shaped plate. A columnar locking block protrudes from the end side of the square card. The columnar locking block is inserted into the through hole and a shaft pin passes through the columnar locking block and the U-shaped plate to form a fixed connection.

[0007] Furthermore, the slot includes a circular hole penetrating the square card and a rectangular groove communicating with the circular hole, the rectangular groove extending along the length direction of the square card; the inner diameter of the circular hole matches the outer diameter of the sucker rod, and the center of the circular hole coincides with the center of the arc-shaped guide surface.

[0008] Furthermore, the small end of the guide disc is fixedly connected to the bottom end of the cylinder and its large end is arranged downwards. The two inclined guide blocks are symmetrically distributed on both sides of the cylinder's axis, and the inclined surface of each inclined guide block slopes upwards from the inner wall of the cylinder towards the axis. The large end diameter of the guide disc, the maximum distance between the two inclined guide blocks, and the minimum radial distance defined by the two arc-shaped guide surfaces decrease sequentially, forming a radially converging guide path.

[0009] Furthermore, the cylinder is also connected to a tilting mechanism, which includes a tilting arm and a tilting hydraulic cylinder. The piston rod of the tilting hydraulic cylinder and one end of the tilting arm are hinged to the side wall of the cylinder, and the cylinder body of the tilting hydraulic cylinder is hinged to the other end of the tilting arm. The tilting mechanism is also connected to a lifting mechanism, which includes a lifting rod and a lifting ring. The bottom end of the lifting rod is fixedly connected to the middle of the end of the tilting arm away from the cylinder, and the lifting ring is fixed to the top end of the lifting rod.

[0010] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model, through its three-stage continuous guiding structure design, eliminates blind spots in the guiding process, ensuring the sucker rod is effectively constrained throughout the entire insertion process. It passively centers and straightens the rod, ultimately ensuring a smooth and almost inevitable entry into the locking position, significantly improving the success rate of the first locking attempt. The structure includes a frustum-shaped guide disc, an inclined guide block, and an arc-shaped guide surface, arranged sequentially along the sucker rod's axial direction, with the guide surfaces spatially interconnected. This ensures the continuity and accuracy of the sucker rod insertion process, effectively correcting alignment deviations and preventing locking failures or collisions caused by misalignment. It significantly reduces the frequency of manual adjustments, achieving rapid and accurate sucker rod insertion, and significantly improving operational efficiency and automation levels. Furthermore… The continuous guide path reduces abnormal situations such as sucker rod jamming and bouncing, and lowers the safety risks caused by mechanical failures in the wellhead area. The design of the rectangular through hole and the square clamp effectively avoids tilting and jamming problems when the square clamp slides, ensuring the stability of the clamping action and effectively improving the sliding accuracy of the square clamp. This, in turn, ensures the coaxiality of the sucker rod during clamping. On this basis, the integrated design of the arc-shaped guide surface and the groove makes the guiding action and the clamping action seamlessly connected. This allows the sucker rod to directly enter the groove for clamping after being guided by the arc-shaped guide surface, without the need for additional path conversion. This reduces the error transmission in the "guiding-clamping" process and also effectively simplifies the internal structure of the bucket and reduces the risk of component failure. 2. This utility model adopts a design in which two hydraulic cylinders are symmetrically arranged and jointly driven by a U-shaped plate to ensure that the square card is subjected to uniform force when moving radially. This avoids the problems of skewness, jamming or accelerated wear caused by unilateral drive, and greatly improves the reliability and service life of the opening and closing action. On this basis, the design of opening ear holes in the ear seat guide structure plays an auxiliary guiding and supporting role. The ear holes of the ear seat are like a sliding bearing, which restricts the radial sway of the piston rod, so that the thrust of the hydraulic cylinder is more purely converted into the linear motion of the square card. This further improves the positional accuracy and stability of the opening and closing of the square card and ensures the alignment of the card slot and the sucker rod. 3. This utility model achieves rapid replacement and adaptation of square clips through a connection method of "columnar clip + through hole + shaft pin". When it is necessary to replace square clips of different specifications, it is only necessary to insert and remove the shaft pin to complete the installation and removal of the square clips. The operation is extremely simple and quick, perfectly achieving the goal of rapid switching to meet diverse operation needs, and significantly improving the versatility of the equipment and the efficiency of on-site operation. The card slot adopts a combination of "circular hole + rectangular groove", which ensures the reliability of clamping while enhancing the fault tolerance and adaptability of the system. The circular hole is used for tight clamping. The sucker rod provides the main clamping force and also achieves "zero-gap clamping," effectively preventing the sucker rod from swaying during tripping. The rectangular groove connected to the circular hole serves to contain debris and release stress, preventing downhole impurities (such as sand and solidified wax) from accumulating in the groove and affecting closure. It also effectively avoids over-constraint caused by minor manufacturing or alignment deviations. Based on this, the design of the circular hole and the arc-shaped guide surface coinciding with each other ensures that the sucker rod can slide directly into the circular hole after being guided by the arc-shaped guide surface, achieving a seamless connection between "guidance and clamping" and solving the clamping failure problem caused by dimensional deviations in traditional clamping grooves. 4. The guide hydraulic sucker rod lifting cylinder of this utility model integrates a flipping mechanism and a lifting mechanism. The flexible flipping of the lifting cylinder is achieved through the flipping arm and the flipping hydraulic cylinder. At the same time, it is connected to external equipment through the lifting rod and the lifting ring, which facilitates lifting and transportation. This not only improves the overall flexibility of the operation, but also enables the equipment to adapt to more complex working environments and needs, improves the working efficiency, and thus meets the posture requirements under different working scenarios. It forms a fully automated operation chain of "lifting-flipping-guiding-clamping", which eliminates the need for manual operation at the wellhead, completely avoids the safety risks in the wellhead area, and perfectly adapts to the development trend of unmanned operation at oilfield wellheads. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 (The cylinder is in a vertical direction); Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 (The cylinder is in a horizontal position); Figure 3 for Figure 1 or Figure 2 A structural diagram excluding the flipping mechanism and the hoisting mechanism; Figure 4 This is a schematic diagram of the structure of the cylindrical body of this utility model; Figure 5 This is a structural schematic diagram of the top and bottom surfaces of the square card of this utility model; Figure 6 This is a schematic diagram of the bottom structure of the guide hydraulic sucker rod cylinder of this utility model in the closed state; Figure 7 This is a schematic diagram of the bottom structure of the guide hydraulic sucker rod cylinder of this utility model in the open state.

[0012] The components are: 1. Cylinder; 2. Tilting mechanism; 201. Tilting arm; 202. Tilting hydraulic cylinder; 3. Lifting mechanism; 301. Lifting rod; 302. Lifting ring; 4. Guide plate; 5. Rectangular through hole; 6. Square clamp; 7. Inclined guide block; 8. Slot; 801. Circular hole; 802. Rectangular groove; 9. Arc-shaped guide surface; 10. Hydraulic cylinder; 1001. Piston rod; 1002. Cylinder body; 11. U-shaped plate; 1101. Through hole; 12. Ear seat; 1201. Ear hole; 13. Columnar clamping block; 14. Shaft pin. Detailed Implementation

[0013] The following embodiments are used to further illustrate the content of this utility model, and do not limit the application of this utility model.

[0014] Please see Figures 1-7 This utility model provides a guide hydraulic sucker rod lifting cylinder, including a hollow cylindrical body 1 with its axis arranged vertically, a flipping mechanism 2 connected to the body 1, and a lifting mechanism 3 connected to the flipping mechanism 2.

[0015] The bottom end of the cylinder 1 is integrally formed with a frustum-shaped guide plate 4. The small end of the guide plate 4 is fixedly connected to the bottom end of the cylinder 1 and its large end is arranged downwards. A rectangular through hole 5 is provided on the side wall of the cylinder 1, which is radially through and has its long side along its axial direction. A square clip 6 is provided in the rectangular through hole 5, which can slide radially along the cylinder 1. The shape of the square clip 6 matches the rectangular through hole 5. Two inclined guide blocks 7 are fixed on the inner bottom of the cylinder 1 and directly below the rectangular through hole 5. The two inclined guide blocks 7 are symmetrically distributed on both sides of the axis of the cylinder 1, and the inclined surface of each inclined guide block 7 is inclined upward from the inner wall of the cylinder 1 towards the axis. The square card 6 has a slot 8 in the middle for holding the sucker rod. The slot 8 includes a circular hole 801 that passes through the square card 6 and a rectangular groove 802 that communicates with the circular hole 801. The rectangular groove 802 extends along the length of the square card 6. The inner diameter of the circular hole 801 matches the outer diameter of the sucker rod (the function and structure of the sucker rod and other conventional equipment are well known in the art, and the connection settings are also common knowledge, so they will not be described in detail here, and are not shown in the attached drawings). The bottom of both sides of the slot 8 is provided with an arc-shaped guide surface 9 along the width of the square card 6. The center of the arc-shaped guide surface 9 coincides with the center of the circular hole 801. The guide disk 4, inclined guide block 7, and arc-shaped guide surface 9 are arranged sequentially from bottom to top along the sucker rod axis, and their guide surfaces are spatially connected to each other, forming a continuous guide surface extending from the bottom of the guide disk 4 to the arc-shaped guide surface 9. More specifically, the large end diameter of the guide disk 4, the maximum distance between the two inclined guide blocks 7, and the minimum radial distance defined by the two arc-shaped guide surfaces 9 decrease sequentially, forming a radially converging guide path.

[0016] A hydraulic cylinder 10 is fixed on each of the opposite sides of the cylinder 1. The piston rods 1001 of the two hydraulic cylinders 10 are arranged radially opposite to each other along the cylinder 1 and are fixedly connected to a U-shaped plate 11. The two ends of the U-shaped plate 11 are fixedly connected to the ends of the two piston rods 1001 respectively, and the middle part of the U-shaped plate 11 is fixedly connected to the end side of the square card 6 so as to drive the square card 6 to slide in the rectangular through hole 5. The cylinder body 1002 of the hydraulic cylinder 10 is fixed to the side wall of the cylinder 1 by the ear seat 12. The ear seat 12 is provided with an ear hole 1201. The piston rod 1001 of the hydraulic cylinder 10 passes through the ear hole 1201 and its end is fixedly connected to the U-shaped plate 11. A through hole 1101 is provided in the middle of the U-shaped plate 11, and a columnar locking block 13 is provided on the end side of the square card 6. The columnar locking block 13 is inserted into the through hole 1101 and a shaft pin 14 passes through the columnar locking block 13 and the U-shaped plate 11 to form a fixed connection.

[0017] The tilting mechanism 2 includes a tilting arm 201 and a tilting hydraulic cylinder 202. The piston rod of the tilting hydraulic cylinder 202 and one end of the tilting arm 201 are hinged together to the side wall of the cylinder 1. The cylinder body of the tilting hydraulic cylinder 202 is hinged to the other end of the tilting arm 201 so that the cylinder 1 rotates around the hinge point between the tilting arm 201 and the cylinder 1.

[0018] The lifting mechanism 3 includes a lifting rod 301 and a lifting ring 302. The bottom end of the lifting rod 301 is fixedly connected to the middle of the end of the tilting arm 201 away from the cylinder 1. The lifting ring 302 is fixed to the top end of the lifting rod 301 and is used to connect to external equipment.

[0019] The working principle and usage process of this utility model are as follows: Figures 1-7 The diagram illustrates that after the guide hydraulic sucker rod sleeve is assembled, the operator mates with the entire sucker rod sleeve and sucker rod slips (the functions and structures of conventional equipment such as sucker rod slips are well-known in the field, and the connection settings are also common knowledge, so they will not be explained in detail here, nor are they shown in the attached diagram). The purpose is to ensure the continuity and accuracy of the sucker rod clamped on the sucker rod slips during the insertion of the sucker rod sleeve, effectively correcting alignment deviations, solving the problem of clamping failure or collision caused by offset, significantly reducing the frequency of manual adjustment, realizing the rapid and accurate insertion of the sucker rod, and significantly improving work efficiency and automation level.

[0020] Since hydraulic cylinder 10 and tilting hydraulic cylinder 202 are controlled by a controller (the functions and structures of controllers and other conventional equipment are well known in the art, and their connection settings are also common knowledge, so they will not be described in detail here, nor are they shown in the accompanying drawings), when the sucker rod needs to be engaged or disengaged, the operator first connects the external equipment (the external equipment can be a lifting and rotating device; the functions and structures of lifting and rotating devices and other conventional equipment are well known in the art, and their connection settings are also common knowledge, so they will not be described in detail here, nor are they shown in the accompanying drawings) to the lifting ring 302. Next, the sucker rod cylinder is hoisted and moved to the working position by external equipment. Then, the piston rod of the tilting hydraulic cylinder 202 is extended and retracted by the controller, so that the cylinder 1 can be tilted between 0-90º until it is tilted to the working position (the working position is normally vertical). Then, the piston rod 1001 of the hydraulic cylinder 10 is retracted by the controller, so that the circular hole 801 on the square card 6 slides under the retraction of the piston rod 1001 until it is aligned with the center through hole of the cylinder 1 (i.e., coaxial). At this time, the sucker rod cylinder is in the open state (e.g., ...). Figure 6 As shown), then the continuous guide surface formed by the guide plate 4, the inclined guide block 7 and the arc guide surface 9 is used to guide the sucker rod held by the sucker rod slip into the central through hole of the cylinder 1. Then, the rotation function of the external equipment is used to push the sucker rod deeper into the central through hole of the cylinder 1. When the sucker rod is stuck in the central through hole of the cylinder 1, the sucker rod is then put on and unput on the slip. After the sucker rod uncoupling operation is completed, the operator first uses the rotation function of the external equipment to separate the central through hole of the cylinder 1 from the sucker rod. Then, the operator controls the hydraulic cylinder 10 to extend the piston rod 1001 through the controller, so that the rectangular groove 802 on the square clip 6 slides under the extension of the piston rod 1001 until it is aligned with the central through hole of the cylinder 1. At this time, the sucker rod lifting cylinder is in the closed state (e.g., Figure 5 (As shown), to prepare for the next sucker rod uncoupling operation; When it is necessary to perform the coupling / uncoupling operation on sucker rods of different specifications, simply insert or remove the shaft pin 14 to replace the square clip 6 of different specifications to meet the coupling / uncoupling operation of sucker rods of different specifications.

Claims

1. A guide hydraulic sucker rod lifting cylinder, comprising a hollow cylindrical body with its axis arranged vertically, characterized in that, The bottom end of the cylinder is integrally formed with a frustum-shaped guide plate. A rectangular through hole is formed on the side wall of the cylinder, which runs radially through the cylinder and whose long side is axially arranged. A square clip that can slide radially along the cylinder is provided in the rectangular through hole. The shape of the square clip matches the rectangular through hole. A slot for holding the sucker rod is formed in the middle of the square clip. An arc-shaped guide surface is provided on each side bottom of the slot along the width direction of the square clip. Two oppositely arranged inclined guide blocks are fixed on the inner bottom of the cylinder, directly below the rectangular through hole. The guide plate, inclined guide blocks and arc-shaped guide surfaces are arranged sequentially from bottom to top along the axial direction of the sucker rod, and the guide surfaces of the three are spatially connected to each other to form a continuous guide surface extending from the bottom of the guide plate to the arc-shaped guide surface.

2. The guide hydraulic sucker rod lifting cylinder according to claim 1, characterized in that, A hydraulic cylinder is fixed on each of the opposite sides of the cylinder. The piston rods of the two hydraulic cylinders are arranged radially opposite to each other along the cylinder and are fixedly connected to a U-shaped plate. The middle part of the U-shaped plate is fixedly connected to the end side of the square card.

3. The guide hydraulic sucker rod lifting cylinder according to claim 2, characterized in that, The cylinder body of the hydraulic cylinder is fixed to the side wall of the cylinder body by an ear seat. The ear seat has an ear hole. The piston rod of the hydraulic cylinder passes through the ear hole and its end is fixedly connected to the U-shaped plate.

4. The guide hydraulic sucker rod lifting cylinder according to claim 3, characterized in that, The U-shaped plate has a through hole in the middle, and the square card has a columnar locking block protruding from its end side. The columnar locking block is inserted into the through hole and a shaft pin passes through the columnar locking block and the U-shaped plate to form a fixed connection.

5. A guide hydraulic sucker rod lifting cylinder according to claim 4, characterized in that, The card slot includes a circular hole penetrating the square card and a rectangular groove communicating with the circular hole, the rectangular groove extending along the length direction of the square card.

6. A guide hydraulic sucker rod lifting cylinder according to claim 5, characterized in that, The inner diameter of the circular hole matches the outer diameter of the sucker rod, and the center of the circular hole coincides with the center of the arc-shaped guide surface.

7. The guide hydraulic sucker rod lifting cylinder according to claim 1, characterized in that, The small end of the guide plate is fixedly connected to the bottom end of the cylinder and its large end is arranged downwards. The two inclined guide blocks are symmetrically distributed on both sides of the cylinder axis, and the inclined surface of each inclined guide block is inclined upwards from the inner wall of the cylinder towards the axis.

8. A guide hydraulic sucker rod lifting cylinder according to claim 7, characterized in that, The large end diameter of the guide disc, the maximum distance between the two inclined guide blocks, and the minimum radial distance defined by the two arc-shaped guide surfaces decrease sequentially, forming a radially converging guide path.

9. A guide hydraulic sucker rod lifting cylinder according to claim 1, characterized in that, The cylinder is also connected to a tilting mechanism, which includes a tilting arm and a tilting hydraulic cylinder. The piston rod of the tilting hydraulic cylinder and one end of the tilting arm are hinged to the side wall of the cylinder, and the cylinder body of the tilting hydraulic cylinder is hinged to the other end of the tilting arm.

10. A guide hydraulic sucker rod lifting cylinder according to claim 9, characterized in that, The flipping mechanism is also connected to a lifting mechanism, which includes a lifting rod and a lifting ring. The bottom end of the lifting rod is fixedly connected to the middle of the end of the flipping arm away from the cylinder, and the lifting ring is fixed to the top end of the lifting rod.

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