Electric unhooking tongs for oilfield oil and gas water well operation

Abstract

The application discloses an electric unpinching clamp for oilfield oil and gas well operation, which comprises an upper driving assembly and a lower driving assembly, the upper driving assembly is detachably connected with the lower driving assembly, the upper driving assembly comprises a shell, connection hole seats are arranged on four corners of the shell, an upper servo motor, a speed reducer, a wind gun, an electromagnetic brake and a counter are arranged on the shell, the lower driving assembly comprises a main support, connection columns are arranged on four corners of the main support, the connection columns are matched with the connection hole seats, a center support is arranged on the main support, a chuck is arranged on the front part of the center support, a lower servo motor, a speed reducer and an electric cylinder are arranged on the center support. The clamp adopts a full electric driving system, solves the possible failure problem of traditional hydraulic devices in high-cold areas, improves operation efficiency, since the system monitors the torque of the upper servo motor in real time, accurate control of the upper pinching torque is realized, meanwhile, the back clamp adopts a high-torque electric cylinder, can realize automatic reset, realizes automatic clamping and automatic reset.

Description

Technical Field

[0001] This invention relates to an oil production device, and more specifically, to an electric uncoupling pliers for oilfield oil, gas and water well operations. Background Technology

[0002] Traditional sucker rod power tongs and tubing power tongs have the following drawbacks: 1. During well testing and workover operations, for drill pipe, tubing, and sucker rod with diameters ranging from Φ19mm to Φ89mm, the corresponding power tongs must be replaced, which is time-consuming and labor-intensive. 2. The climbing clamping mechanism of the tubing power tong's back clamp design is prone to failure to disengage due to excessive uncoupling torque. 3. They cannot meet the performance requirements of the power tongs for automated rod and tubing tripping processes during well testing and workover operations. Summary of the Invention

[0003] Therefore, it is necessary to provide an electric uncoupling pliers for oilfield oil, gas and water well operations to address the aforementioned technical problems.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: An electric uncoupling pliers for oilfield oil, gas, and water well operations, characterized in that the pliers comprise an upper drive assembly and a lower drive assembly, wherein the upper drive assembly is detachably connected to the lower drive assembly. The upper drive assembly includes a housing, with connecting holes at each of the four corners of the housing. The housing is equipped with an upper servo motor, a reducer, a pneumatic wrench, an electromagnetic brake, and a counter. The lower drive assembly includes a main support, with connecting posts at each of the four corners of the main support. The connecting posts cooperate with the connecting hole seats. A central frame is provided on the main support, with a clamp at the front of the central frame. A lower servo motor, a reducer, and an electric cylinder are provided on the central frame.

[0005] In a preferred embodiment of the present invention, the electromagnetic brake and the counter are arranged coaxially.

[0006] As a preferred embodiment of the present invention, The upper servo motor has a main drive gear at its end. This main drive gear engages with a first electromagnetic clutch via a first clutch gear. The first clutch gear and the first electromagnetic clutch are coaxially arranged. A second clutch gear is located at the bottom of the first electromagnetic clutch, also coaxially arranged. The second clutch gear engages sequentially with a first pinion, a second pinion, and a second brake gear. A first brake gear is coaxially arranged above the second brake gear, rotating synchronously with it. The first brake gear is connected to an electromagnetic brake via a brake shaft. The electromagnetic brake controls the brake shaft. The first brake gear engages with a central gear, which in turn engages with a first air jet gear. The first air jet gear engages with a first C-type gear, which is coaxially arranged with the second C-type gear. The output end of the air cannon is equipped with an air cannon shaft, the first air cannon gear is located on the upper part of the air cannon shaft, and the lower part of the air cannon shaft is equipped with a second air cannon gear, which meshes with the second pinion. The main drive gear has a first transmission gear on one side, which cooperates with the first transmission gear. The lower part of the first transmission gear has a second transmission gear coaxially arranged. The first transmission gear and the second transmission gear rotate synchronously. The second transmission gear drives a third transmission gear. The lower part of the second transmission gear has a second electromagnetic clutch, and the bottom of the second electromagnetic clutch has a third transmission gear coaxially arranged.

[0007] In a preferred embodiment of the present invention, a counting shaft is provided at the center of the brake shaft, and the counting shaft cooperates with the counter.

[0008] Compared with the prior art, the present invention has the following beneficial effects: The electric uncoupling pliers used for oil, gas, and water well operations in this oilfield have the following advantages: 1. The electric uncoupling pliers for oil, gas and water well operations in this oilfield adopt a fully electric drive system (operating in a wide temperature range of -40℃ to 80℃), which solves the problem of possible failure of traditional hydraulic devices in high-altitude and cold regions and improves operational efficiency; 2. Because the system monitors the torque of the servo motor 1 in real time, it can achieve precise control of the clamping torque. At the same time, the back clamp uses a high-torque electric cylinder, which can achieve automatic reset, easily realizing automatic clamping and automatic reset. Attached Figure Description

[0009] To more clearly illustrate the solutions in this invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0010] Figure 1 This is a three-dimensional structural schematic diagram of the electric uncoupling pliers for oilfield oil, gas and water well operations according to the present invention; Figure 2 for Figure 1 A three-dimensional structural diagram of an electric uncoupling pliers for oil, gas and water well operations in an oilfield, presented from another perspective; Figure 3 for Figure 1 An exploded view of the caliper's 3D structure; Figure 4 for Figure 3 A further schematic diagram of the local structure of the upper driving component; Figure 5 for Figure 4 The structural diagram of the upper driving component is shown from another perspective. Figure 6 for Figure 4 A three-dimensional structural exploded view of the upper drive component; Figure 7 for Figure 1 A diagram illustrating the unslip operation of the caliper. Detailed Implementation

[0011] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0012] like Figure 1 and Figure 2 As shown, the electric uncoupling pliers for oil, gas and water well operations in the oilfield include an upper drive assembly S1 and a lower drive assembly S2, with the upper drive assembly S1 being detachably connected to the lower drive assembly S2.

[0013] like Figures 3 to 6 As shown, the upper drive assembly S1 includes a housing 100, with connecting holes 101 at each of the four corners of the housing 100. The housing 100 is equipped with an upper servo motor 1, a reducer 2, a blower 7, an electromagnetic brake 8, and a counter 9. The electromagnetic brake 8 and the counter 9 are coaxially arranged.

[0014] The upper servo motor 1 has a main drive gear 11 at its end. This main drive gear 11 engages with a first electromagnetic clutch 23 via a first clutch gear 22. The first clutch gear 22 and the first electromagnetic clutch 23 are coaxially arranged. A second clutch gear 24 is located at the bottom of the first electromagnetic clutch 23. The second clutch gear 24 is coaxially arranged with the first electromagnetic clutch 23. The second clutch gear 24 engages sequentially with a first pinion 25, a second pinion 16, and a second brake gear 26. A first brake gear 29 is coaxially arranged above the second brake gear 26, which rotates synchronously with the first brake gear 29. The first brake gear 29 is connected to the electromagnetic brake 8 through the brake shaft 21. The electromagnetic brake 8 controls the brake shaft 21. The first brake gear 29 cooperates with the central gear 27, which cooperates with the first air jet gear 28, which cooperates with the first C-type gear 30. The first C-type gear 30 and the second C-type gear 18 are coaxially arranged.

[0015] The brake shaft 21 has a counting shaft 20 at its center, which works in conjunction with the counter 9.

[0016] The output end of the air cannon 7 is provided with an air cannon shaft 19, the first air cannon gear 28 is provided on the upper part of the air cannon shaft 19, and the lower part of the air cannon shaft 19 is provided with a second air cannon gear 17, which cooperates with the second pinion 16.

[0017] The main drive gear 11 has a first transmission gear A1 on one side, which cooperates with the first transmission gear A1. The lower part of the first transmission gear A1 has a second transmission gear A2 coaxially arranged. The first transmission gear A1 and the second transmission gear A2 rotate synchronously. The second transmission gear A2 drives the third transmission gear A3. The lower part of the second transmission gear A2 has a second electromagnetic clutch 14, and the bottom of the second electromagnetic clutch 14 has a third transmission gear A4 coaxially arranged.

[0018] The lower drive assembly S2 includes a main support 200, with connecting posts 201 at each of its four corners. These connecting posts 201 mate with connecting hole seats 101. A central frame 6 is mounted on the main support 200, with a chuck 10 at its front. A lower servo motor 3, a reducer 4, and an electric cylinder 5 are also mounted on the central frame 6. It should be noted that the electric cylinder 5 is a high-torque electric cylinder and employs a lever arm drive structure.

[0019] In addition, the center support 6 is a three-point center support with adaptive floating of ±0.3mm, which can reliably clamp drill pipes, tubing and sucker rods of various sizes with diameters from Φ19mm to Φ89mm, without slippage or failure to detach.

[0020] The following describes the working method of the electric uncoupling pliers used in oil, gas, and water well operations in this oilfield. Taking the process of uncoupling a Φ73mm tubing in the well as an example, the steps include: Step S1, Back Clamp. Start the lower servo motor 3, which provides thrust to the center frame 6 through the reducer 4 and electric cylinder 5, so that the chuck 10 of the center frame 6 obtains a clamping force of 15 kN•m, clamping the pipe rod coupling 31, as shown. Figure 7 As shown; Step S2, Power Clamp. Start the upper servo motor 1, which is connected to the main drive gear 11 and the first clutch gear 22 through the reducer 2, and then connected to the second clutch gear 24, the first pinion 25, the second pinion 16, the second brake gear 26, and the second air cannon gear 17 in sequence through the first electromagnetic clutch 23, transmitting 10600 N•m of torque to the second C-type gear 18. As a result, the second C-type gear 18 rotates counterclockwise. Step S3: The electromagnetic brake 8 is activated. The electromagnetic brake 8 drives the first brake gear 29 through the brake shaft 21. The first brake gear 29 is connected in sequence to the central gear 27 and the first air cannon gear 28, thereby applying a certain braking force to the first C-type gear 30. Step S4: The rotational force of the second C-type gear 18 and the braking force of the first C-type gear 30 are used to make the power pliers clamp the oil pipe body or the sucker rod neck 32. In step S5, after the back clamp and power clamp clamp are engaged, if the continuous output torque of the second C-type gear 18 reaches 10600 N•m but the motor still does not rotate, the program controls the first electromagnetic clutch 23 and the second electromagnetic clutch 14 to disengage. The program then controls the activation of the impact uncoupling mechanism, namely the air wrench 7 and the air wrench shaft 19. The air wrench 7 then drives the second air wrench gear 17, the second pinion 16, and the second brake gear 26 to rotate via the air wrench shaft 19. When the second brake gear 26 drives the counter 9 via the counting shaft 20, and the counter 9 reaches the set value of one revolution, it automatically switches to the upper servo motor 1 to enter high-speed uncoupling (60 rpm / min) mode. It should be noted that throughout the entire process, the system monitors the torque of the upper servo motor 1 in real time, effectively preventing damage to the oil pipe threads. Step S6: When the counter 9 reaches the set number of unhooking cycles, the upper servo motor 1 stops unloading the tube, and at the same time, the second C-type gear 18 and the first C-type gear 30 are reset according to the value of the counter 9.

[0021] As for the buckling process, it simply involves changing the rotation direction of the upper servo motor 1 to clockwise, without needing to use the impact buckling mechanism.

[0022] The electric uncoupling pliers used for oil, gas, and water well operations in this oilfield have the following advantages: 3. The electric uncoupling pliers for oil, gas and water well operations in this oilfield adopt a fully electric drive system (operating in a wide temperature range of -40℃ to 80℃), which solves the problem of possible failure of traditional hydraulic devices in high-altitude and cold regions and improves operational efficiency; 4. Because the system monitors the torque of the servo motor 1 in real time, it can achieve precise control of the clamping torque. At the same time, the back clamp uses a high-torque electric cylinder, which can achieve automatic reset, easily realizing automatic clamping and automatic reset.

[0023] Obviously, the embodiments described above are only some embodiments of this application, and not all embodiments. The accompanying drawings show preferred embodiments of this application, but do not limit the patent scope of this application.

Claims

1. An electric uncoupling pliers for oilfield oil, gas and water well operations, characterized in that, The electric uncoupling pliers for oilfield oil, gas and water well operations include an upper drive assembly (S1) and a lower drive assembly (S2), wherein the upper drive assembly (S1) is detachably connected to the lower drive assembly (S2). The upper drive assembly (S1) includes a housing (100), and connection holes (101) are provided at the four corners of the housing (100). The housing (100) is provided with an upper servo motor (1), a reducer (2), a blower (7), an electromagnetic brake (8) and a counter (9). The lower drive assembly (S2) includes a main support (200), and each of the four corners of the main support (200) is provided with a connecting post (201). The connecting post (201) cooperates with the connecting hole seat (101). The main support (200) is provided with a central frame (6). The front of the central frame (6) is provided with a clamp (10). The central frame (6) is provided with a lower servo motor (3), a reducer (4) and an electric cylinder (5).

2. The electric uncoupling pliers for oilfield oil, gas and water well operations according to claim 1, characterized in that, The electromagnetic brake (8) and the counter (9) are coaxially arranged.

3. The electric uncoupling pliers for oilfield oil, gas and water well operations according to claim 1, characterized in that, The upper servo motor (1) has a main drive gear (11) at its end. The main drive gear (11) engages with the first electromagnetic clutch (23) via a first clutch gear (22). The first clutch gear (22) and the first electromagnetic clutch (23) are coaxially arranged. The bottom of the first electromagnetic clutch (23) has a second clutch gear (24). The second clutch gear (24) and the first electromagnetic clutch (23) are coaxially arranged. The second clutch gear (24) engages with the first pinion (25), the second pinion (16), and the second brake gear (26) in sequence. The second brake gear (26)... Above the first brake gear (29) is a first brake gear (29) coaxially arranged. The second brake gear (26) rotates synchronously with the first brake gear (29). The first brake gear (29) is connected to the electromagnetic brake (8) through the brake shaft (21). The electromagnetic brake (8) controls the brake shaft (21). The first brake gear (29) cooperates with the central gear (27). The central gear (27) cooperates with the first air jet gear (28). The first air jet gear (28) cooperates with the first C-type gear (30). The first C-type gear (30) and the second C-type gear (18) are coaxially arranged. The output end of the air cannon (7) is provided with an air cannon shaft (19), the first air cannon gear (28) is provided on the upper part of the air cannon shaft (19), and the lower part of the air cannon shaft (19) is provided with a second air cannon gear (17), which cooperates with the second pinion (16). The main drive gear (11) has a first transmission gear (A1) on one side, and the main drive gear (11) cooperates with the first transmission gear (A1). The lower part of the first transmission gear (A1) has a second transmission gear (A2) coaxially arranged. The first transmission gear (A1) and the second transmission gear (A2) rotate synchronously. The second transmission gear (A2) drives the third transmission gear (A3). The lower part of the second transmission gear (A2) has a second electromagnetic clutch (14), and the bottom of the second electromagnetic clutch (14) has a third transmission gear (A4) coaxially arranged.

4. The electric uncoupling pliers for oilfield oil, gas and water well operations according to claim 1, characterized in that, The brake shaft (21) is provided with a counting shaft (20) at its center, and the counting shaft (20) cooperates with the counter (9).

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