Electric elevator clamp for well workover

Abstract

Disclosed is an electric elevator clamp for well workover, which clamp relates to the technical field of well control and blowout prevention. The electric elevator clamp comprises an elevator clamp body (1), a clamp leaf (2), a movable leaf (3), electric push rods (4), a lifting arm (5), a lifting ring (6) and an overturning mechanism, wherein a vertically-penetrating mounting hole is provided in the upper end of the elevator clamp body (1), and a vertically-penetrating notch, the rear portion of which is in communication with the mounting hole, is provided in the upper side of the front portion of the elevator clamp body (1); and after push rods of the two electric push rods (4) are extended, the movable leaf (3) and the clamp leaf (2) are engaged together, and the movable leaf (3), the clamp leaf (2) and the elevator clamp body (1) jointly clamp an oil pipe. By providing the electric push rods (4), traditional hydraulic drive is changed, the laying of a hydraulic pipeline is simplified, and the problem of hydraulic oil leakage is avoided; and the phenomenon in which hydraulic oil has increased viscosity due to the low temperature in winter, resulting in poor fluidity and slow and sluggish actions can be avoided. By providing the overturning mechanism, the upper end of the elevator clamp body (1) can be driven to turn-over back and forth, which facilitates the grasping of the oil pipe on an oil pipe rack; and the electric elevator clamp has the advantages of being safe, labor-saving, simple and efficient.

Description

Electric elevator for well repair Technical Field

[0001] The invention relates to the technical field of well control and blowout prevention, and is an electric elevator for well repair. Background Art

[0002] Well workover refers to the drilling and subsequent maintenance of oil wells. To ensure the smooth operation of the well, maintenance and upkeep measures are required. Lifting and lowering pipes from the well is an essential step in the workover process. In some cases, manual and hydraulic elevators are commonly used in workover operations. Manual elevators rely on manual operation to lift and lower the pipes. Hydraulic elevators rely on hydraulic cylinders to open and close the elevators, eliminating manual intervention and completing the pipe lifting and lowering operations.

[0003] When using a manual elevator, two people are required to cooperate with each other, and the personnel are standing at the wellhead, which makes them vulnerable to injury. On the one hand, it takes up more human resources and has high labor intensity. On the other hand, it often causes bumps and bruises, and sometimes even casualties, making the operation extremely unsafe.

[0004] While hydraulic elevators can solve the problems associated with manual elevators, they also present new drawbacks: they involve numerous hydraulic lines and joints, which can lead to frequent leaks; and when temperatures are low, hydraulic elevators can become stuck or slow, requiring frequent maintenance. Summary of the Invention

[0005] The present invention provides an electric elevator for well repair, which overcomes the shortcomings of the above elevators and can effectively solve the problems of complex operation, high labor intensity, easy bumps and scratches, slipping and injuries, and frequent maintenance during the operation of the above elevators.

[0006] The technical solution of the present invention is achieved through the following measures: an electric elevator for well repair, comprising an elevator body, a card leaf, a loose leaf, an electric push rod, a lifting arm, a lifting ring and a turning mechanism, wherein the upper end of the elevator body is provided with a mounting hole which passes through vertically, the upper front side of the elevator body is provided with a notch which passes through vertically and is connected to the mounting hole at the rear, the right front side of the elevator body corresponding to the right side of the notch is hingedly connected to the card leaf, the left front side of the elevator body corresponding to the left side of the notch is hingedly connected to the loose leaf, and the rear left and right sides of the elevator body are hinged. An electric push rod is connected to it, and each electric push rod has a push rod. The front end of the left push rod is hinged to the left part of the movable leaf, and the front end of the right push rod is hinged to the right part of the card leaf. Hanging arms are fixed on the left and right sides of the upper part of the elevator body. An L-shaped blocking rod can be detachably installed between the side of each hanging arm away from the elevator body and the lower side of the elevator body. A lifting ring is set on the outside of each hanging arm. A flip mechanism is provided on the left side of the rear of the elevator body, which is fixed to the lifting ring on the left and can drive the upper end of the elevator body to flip forward and backward.

[0007] In one embodiment, the above-mentioned flipping mechanism may include an installation box, a reduction motor and a flip ear plate. A installation box with an upper opening is fixedly installed on the left side of the lower part of the lifting ring, a reduction motor is fixedly installed on the inner side of the left part of the installation box, and a swing hole that passes through the upper and lower parts is provided on the lower side of the installation box corresponding to the right position of the reduction motor. A flip ear plate is fixedly installed on the outer side of the right end of the output shaft of the reduction motor, and the lower end passes through the swing hole and is located below the installation box. The lower part of the flip ear plate is fixedly installed together with the left barrier rod.

[0008] In one embodiment, the above-mentioned flipping mechanism may also include a flipping shaft and a torque limiter. A rotating hole that passes through the left and right sides is provided on the right side of the installation box. The right part of the flipping shaft is rotatably installed in the rotating hole. The left end of the flipping shaft and the right end of the output shaft of the reduction motor are connected through a torque limiter. The upper part of the flip ear plate is fixedly installed together with the outer side of the right part of the flip shaft.

[0009] In one embodiment, a limit plate is detachably fixedly installed on the outer side of the right end of the flip shaft corresponding to the right position of the installation box, a stop block is fixedly installed on the right side of the installation box, and the upper side of the front end of the limit plate is rotated upward 90 degrees to contact the front side of the stop block.

[0010] In one embodiment, a mounting cover can be fixedly installed on the upper side of the above-mentioned mounting box, and a mounting base is fixedly installed on the right side of the mounting box. There is an arc-shaped groove on the right side of the mounting base that opens to the right and passes through from top to bottom. The right side of the front of the mounting base is hingedly connected to an arc-shaped connecting plate that matches the lifting ring, and the rear part of the connecting plate is fixedly installed together with the right side of the rear of the mounting base.

[0011] In one embodiment, a fixing seat may be fixedly mounted on the rear side of the elevator body, and the rear ends of the left and right electric push rods are hingedly connected to the left and right inner sides of the fixing seat respectively.

[0012] In one embodiment, a stepped tubular bushing may be provided in the mounting hole. The bushing includes a main body bushing fixedly mounted to the elevator body at the rear and a clip bushing fixedly mounted to the clip at the front.

[0013] Compared with the prior art, the present invention has achieved the following technical effects:

[0014] The present invention has a reasonable and compact structure and is easy to use. After the push rods of the two electric push rods are extended, the loose-leaf and the card page are locked together, and the loose-leaf, the card page and the elevator body jointly clamp the oil pipe. The setting of the electric push rod changes the traditional hydraulic drive, simplifies the laying of hydraulic pipelines, avoids the problem of hydraulic oil leakage, and can also avoid the phenomenon that the viscosity of hydraulic oil caused by low temperature in winter leads to poor fluidity and slow lag of various actions. The setting of the flipping mechanism can drive the upper end of the elevator body to flip back and forth, which is convenient for grabbing the oil pipe on the oil pipe rack. It has the characteristics of safety, labor saving, simplicity and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] FIG1 is a schematic diagram of a front cross-sectional structure of a device in use according to one or more embodiments.

[0016] FIG2 is a schematic diagram of a left side view of the structure when used according to one or more embodiments.

[0017] FIG3 is a schematic perspective view of a flip structure according to one or more embodiments.

[0018] Explanation of the accompanying reference numerals: 1-elevator body, 2-card page, 3-loose-leaf, 4-electric push rod, 5-lifting arm, 6-lifting ring, 7-installation box, 8-reduction motor, 9-flip ear plate, 10-flip shaft, 11-torque limiter, 12-installation cover, 13-installation seat, 14-connecting plate, 15-fixed seat, 16-limiting plate, 17-stopper, 18-main body bushing, 19-stop rod. DETAILED DESCRIPTION

[0019] The present invention is not limited to the following embodiments, and specific implementation methods can be determined based on the technical solutions of the present invention and actual conditions.

[0020] In the present invention, for the convenience of description, the description of the relative position relationship of each component is described according to the layout method of Figure 1 of the specification, such as: the position relationship of front, back, up, down, left, right, etc. is determined according to the layout direction of the figure in the specification.

[0021] The present invention will be further described below in conjunction with the embodiments and accompanying drawings:

[0022] As shown in Figures 1, 2 and 3, the electric elevator for well repair includes an elevator body 1, a card page 2, a loose leaf 3, an electric push rod 4, a boom 5, a lifting ring 6 and a turning mechanism. The upper end of the elevator body 1 has a mounting hole that passes through from top to bottom. The upper front side of the elevator body 1 has a notch that passes through from top to bottom and is connected to the mounting hole at the rear. The right front side of the elevator body 1 corresponding to the right side of the notch is hingedly connected to the card page 2, and the left front side of the elevator body 1 corresponding to the left side of the notch is hingedly connected to the loose leaf 3. The left and right sides of the rear of the elevator body 1 are both hingedly connected to electric Push rod 4, each electric push rod 4 has a push rod, the front end of the left push rod is hingedly connected to the left part of the loose-leaf 3, and the front end of the right push rod is hingedly connected to the right part of the card page 2. Hanging arms 5 are fixed on the left and right sides of the upper part of the elevator body 1. An L-shaped blocking rod 19 can be detachably installed between the side of each hanging arm 5 away from the elevator body 1 and the lower side of the elevator body 1. A lifting ring 6 is set on the outer side of each hanging arm 5. A flip mechanism is provided on the left side of the rear of the elevator body 1, which is fixedly installed with the left lifting ring 6 and can drive the upper end of the elevator body 1 to flip forward and backward. According to the requirements, the elevator body 1, the card page 2, the loose-leaf 3 and the electric push rod 4 are all existing well-known technologies. The push rod of each electric push rod 4 is located between the boom 5 and the blocking rod 19 at the corresponding position. When the left push rod and the right push rod are extended, the loose-leaf 3 and the card page 2 are engaged with each other to close the gap. When the left push rod and the right push rod are retracted, the loose-leaf 3 and the card page 2 are separated from each other to open the gap. The elevator body 1 and the boom 5 on the left and right sides are set as one. During use, after the push rods of the two electric push rods 4 are extended, the loose-leaf 3 and the card page 2 are locked together to close the gap, and the loose-leaf 3, the card page 2 and the elevator body 1 jointly clamp the oil pipe. The setting of the electric push rod 4 changes the traditional hydraulic drive, simplifies the laying of the hydraulic pipeline, avoids the problem of hydraulic oil leakage, and at the same time avoids the phenomenon that the hydraulic oil becomes viscous and has poor fluidity due to low temperature in winter, which makes various actions slow and delayed. The setting of the flip mechanism can drive the upper end of the elevator body 1 to flip back and forth, which is convenient for grabbing the oil pipe on the oil pipe rack. The present invention has a reasonable and compact structure, is easy to use, and has the characteristics of safety, labor saving, simplicity and high efficiency.

[0023] In one embodiment, as shown in Figures 1, 2, and 3, the flip mechanism includes a mounting box 7, a reduction motor 8, and a flip lug 9. The mounting box 7, with an upper opening, is fixedly mounted on the left side of the lower portion of the lifting ring 6. The reduction motor 8 is fixedly mounted on the inner side of the left portion of the mounting box 7. A swing hole extending vertically through the lower side of the mounting box 7, corresponding to the right side of the reduction motor 8, is provided. The flip lug 9 is fixedly mounted on the outer side of the right end of the output shaft of the reduction motor 8, with the lower end passing through the swing hole and positioned below the mounting box 7. The lower portion of the flip lug 9 is fixedly mounted to the left stop bar 19. During use, this arrangement facilitates the overall fabrication of the flip mechanism, reduces installation costs, shortens assembly time, and extends operating time.

[0024] In one embodiment, as shown in Figures 1 and 3, the tilting mechanism further includes a tilting shaft 10 and a torque limiter 11. A rotating hole extending from left to right is provided on the right side of the mounting box 7. The right portion of the tilting shaft 10 is rotatably mounted within the rotating hole. The left end of the tilting shaft 10 is connected to the right end of the output shaft of the reduction motor 8 via the torque limiter 11. The upper portion of the tilting lug 9 is fixedly mounted to the outer side of the right portion of the tilting shaft 10. The torque limiter 11 can be of conventionally known technology, such as a friction plate torque limiter, as required. During use, the torque limiter 11 connects the output shaft of the reduction motor 8 to the tilting lug 9. Its primary function is overload protection. When the torque required to rotate the elevator body 1 by the tilting lug 9 exceeds a set value, the output shaft of the reduction motor 8 and the tilting shaft 10 rotate relative to each other, thereby limiting the torque transmitted by the transmission system through slippage. When the torque drops below the set value, the connection is restored automatically, preventing mechanical damage and avoiding costly downtime.

[0025] In one embodiment, as shown in Figures 1 and 3, a limit plate 16 is removably fixedly mounted on the outer side of the right end of the tilt shaft 10, corresponding to the right side of the mounting box 7. A stopper 17 is fixedly mounted on the right side of the mounting box 7. The upper front end of the limit plate 16 rotates 90 degrees upward to contact the front side of the stopper 17. As required, the limit plate 16 is L-shaped. A key is provided between the limit plate 16 and the tilt shaft 10. After the limit plate 16 rotates 90 degrees with the tilt shaft 10, it contacts the front or rear side of the stopper 17, ensuring a 90-degree rotation angle for the tilt shaft 10, thereby enabling the oil pipe to be grasped. The limit plate 16 and the tilt shaft 10 are removably fixedly mounted together by connecting bolts. During use, the stopper 17 is removably fixedly mounted on the right side of the mounting box 7. The position of the stopper 17 can be adjusted, thereby adjusting the rotation angle of the tilt shaft 10 to facilitate the grasping of the oil pipe, providing convenient adjustment.

[0026] In one embodiment, as shown in Figures 1, 2, and 3, a mounting cover 12 is fixedly mounted on the upper side of the mounting box 7, and a mounting base 13 is fixedly mounted on the right side of the mounting box 7. The right side of the mounting base 13 has an arc-shaped groove that opens to the right and runs through from top to bottom. The right side of the front of the mounting base 13 is hingedly connected to an arc-shaped connecting plate 14 that matches the lifting ring 6. The rear part of the connecting plate 14 is fixedly mounted together with the right side of the rear of the mounting base 13. As required, the circular hole formed by the inner side of the connecting plate 14 and the arc-shaped groove matches the cross-section of the left lifting ring 6. During use, the installation cover 12 can protect the reduction motor 8 and the torque limiter 11 in the mounting box 7, prevent oil stains on the outer wall of the oil pipe from falling into the mounting box 7 and damaging the reduction motor 8 and the torque limiter 11, and reduce the failure rate. The installation of the connecting plate 14 facilitates the installation between the left lifting ring 6 and the mounting box 7, and can quickly fix the mounting box 7.

[0027] In one embodiment, as shown in Figure 2, a mounting base 15 is fixedly mounted on the rear side of the elevator body 1. The rear ends of the left and right electric push rods 4 are hingedly connected to the left and right inner sides of the mounting base 15, respectively. This arrangement facilitates the installation, maintenance, and installation of the control system of the electric push rods 4 during use.

[0028] In one embodiment, as shown in Figures 1 and 2, a stepped tubular bushing is installed in the mounting hole. The bushings include a main body bushing 18 fixedly mounted to the elevator body 1 at the rear, and a tab bushing fixedly mounted to the tab 2 at the front. As needed, the tab bushing and main body bushing 18 are arranged in halves and brought close together to form a stepped tubular bushing. During use, different bushings can be installed according to the specifications of the oil pipe, facilitating assembly and disassembly and improving work efficiency.

[0029] The above technical features constitute the embodiments of the present invention, which have strong adaptability and implementation effect. Non-essential technical features can be added or removed according to actual needs to meet the requirements of different situations.

Claims

1. An electric elevator for well repair, characterized in that: The invention comprises an elevator body (1), a card page (2), a loose leaf (3), an electric push rod (4), a lifting arm (5), a lifting ring (6) and a turning mechanism. The upper end of the elevator body (1) is provided with a mounting hole which passes through from top to bottom. The upper front side of the elevator body (1) is provided with a notch which passes through from top to bottom and is connected to the mounting hole at the rear. The right front side of the elevator body (1) corresponding to the right side of the notch is hingedly connected with the card page (2). The left front side of the elevator body (1) corresponding to the left side of the notch is hingedly connected with the loose leaf (3). The rear left side and the rear right side of the elevator body (1) are both hingedly connected with electric push rods (4). Each electric push rod (4) are provided with push rods, the front end of the left push rod is hingedly connected to the left part of the movable leaf (3), and the front end of the right push rod is hingedly connected to the right part of the locking leaf (2). The upper left and right sides of the elevator body (1) are fixed with hanging arms (5), and a side of each hanging arm (5) away from the elevator body (1) and a L-shaped blocking rod (19) are detachably installed between the lower side of the elevator body (1), and the outer side of each hanging arm (5) is provided with a lifting ring (6). The left side of the rear of the elevator body (1) is provided with a flipping mechanism which is fixedly installed with the left lifting ring (6) and can drive the upper end of the elevator body (1) to flip forward and backward.

2. The electric elevator for well repairing according to claim 1, characterized in that: The flip mechanism comprises a mounting box (7), a reduction motor (8) and a flip ear plate (9); a mounting box (7) with an upper opening is fixedly mounted on the left side of the lower part of the lifting ring (6); a reduction motor (8) is fixedly mounted on the inner side of the left part of the mounting box (7); a swing hole penetrating from top to bottom is arranged on the lower side of the mounting box (7) corresponding to the right position of the reduction motor (8); a flip ear plate (9) whose lower end passes through the swing hole and is located below the mounting box (7) is fixedly mounted on the outer side of the right end of the output shaft of the reduction motor (8); and the lower part of the flip ear plate (9) is fixedly mounted together with the left stop rod (19).

3. The electric elevator for well repairing according to claim 2, characterized in that: The flip mechanism also includes a flip shaft (10) and a torque limiter (11). A rotating hole that passes through the left and right sides of the installation box (7) is provided on the right side. The right part of the flip shaft (10) is rotatably installed in the rotating hole. The left end of the flip shaft (10) is connected to the right end of the output shaft of the reduction motor (8) through the torque limiter (11). The upper part of the flip ear plate (9) is fixedly installed with the outer side of the right part of the flip shaft (10).

4. The electric elevator for well repairing according to claim 3, characterized in that: A limit plate (16) is detachably fixedly installed on the outer side of the right end of the turning shaft (10) corresponding to the right position of the installation box (7), a stopper (17) is fixedly installed on the right side of the installation box (7), and the upper side of the front end of the limit plate (16) is rotated 90 degrees upward to contact the front side of the stopper (17).

5. The electric elevator for well repairing according to claim 2, 3 or 4, characterized in that: A mounting cover (12) is fixedly mounted on the upper side of the mounting box (7), a mounting seat (13) is fixedly mounted on the right side of the mounting box (7), an arc-shaped groove opening to the right and penetrating from top to bottom is provided on the right side of the mounting seat (13), an arc-shaped connecting plate (14) matching the lifting ring (6) is hingedly connected to the right side of the front part of the mounting seat (13), and the rear part of the connecting plate (14) is fixedly mounted together with the right side of the rear part of the mounting seat (13).

6. The electric elevator for well repairing according to claim 1, 2, 3 or 4, characterized in that: A fixing seat (15) is fixedly installed on the rear side of the elevator body (1), and the rear ends of the left electric push rod (4) and the right electric push rod (4) are respectively hingedly connected to the left inner side of the fixing seat (15) and the right inner side of the fixing seat (15).

7. The electric elevator for well repairing according to claim 5, characterized in that: A fixing seat (15) is fixedly installed on the rear side of the elevator body (1), and the rear ends of the left electric push rod (4) and the right electric push rod (4) are respectively hingedly connected to the left inner side of the fixing seat (15) and the right inner side of the fixing seat (15).

8. The electric elevator for well repairing according to claim 1, 2, 3, 4 or 7, characterized in that: A stepped tubular bushing is arranged in the installation hole, and the bushing comprises a main body bushing (18) fixedly installed with the hanging card main body (1) at the rear and a card leaf bushing fixedly installed with the card leaf (2) at the front.

9. The electric elevator for well repairing according to claim 5, characterized in that: A stepped tubular bushing is arranged in the installation hole, and the bushing comprises a main body bushing (18) fixedly installed with the hanging card main body (1) at the rear and a card leaf bushing fixedly installed with the card leaf (2) at the front.

10. The electric elevator for well repairing according to claim 6, characterized in that: A stepped tubular bushing is arranged in the installation hole, and the bushing comprises a main body bushing (18) fixedly installed with the hanging card main body (1) at the rear and a card leaf bushing fixedly installed with the card leaf (2) at the front.

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