Automatic lifting and placing device for polish rod of pumping unit and using method of automatic lifting and placing

Abstract

The invention relates to the technical field of pumping unit polish rod lifting and lowering devices, in particular to an automatic pumping unit polish rod lifting and lowering device and a using method thereof.The pumping unit polish rod lifting and lowering device comprises a polish rod, a first hydraulic polish rod clamp, a second hydraulic polish rod clamp, a top plate and a hydraulic cylinder; a first hydraulic polish rod clamp and a second hydraulic polish rod clamp which can tightly hold the polish rod are arranged on the outer side of the polish rod in an up-down spaced mode, a top plate is arranged on the outer side of the polish rod corresponding to the position of the lower side of the first hydraulic polish rod clamp, a hydraulic cylinder is arranged on the lower side of the top plate, and the first hydraulic polish rod clamp, the second hydraulic polish rod clamp and the hydraulic cylinder are connected with a hydraulic pump. The device is reasonable and compact in structure and convenient to use, the two hydraulic polish rod clamps capable of being hydraulically controlled are arranged to hold or loosen the polish rod, the hydraulic cylinder is lifted to push the top plate to drive the polish rod to be lifted upwards, actions are repeated till the designated height is reached, the workload of operators is greatly reduced, potential safety hazards of close-range operation are reduced, and the working efficiency is improved. The device has the characteristics of safety, labor saving, simplicity, convenience and high efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of a polished rod lifting and lowering device for an oil pumping unit, and particularly relates to an automatic polished rod lifting and lowering device for an oil pumping unit and a use method thereof. Background Art

[0002] Xinjiang Oilfield is rich in heavy oil resources, with more than 20,000 heavy oil production wells, of which 80% are pumping wells using dual-purpose pumps. The steam injection function or oil pumping function is achieved by adjusting the position of the piston of the dual-purpose pump in the downhole tubular structure. When adjusting the position of the piston of the dual-purpose pump in the downhole tubular structure at the production site, the operator uses the pumping unit, the light rod and two light rod clips to lift or lower the light rod through lifting and injection or hanging and pumping operations. Taking the feedback pump as an example, when injecting steam, the light rod needs to be lifted up 4 to 7 meters, and when pumping oil, the light rod needs to be lowered 4 to 7 meters. It takes two operators 30 minutes, and during the operation, it needs to be repeatedly performed: tighten the light rod clip-start and stop the pumping unit-loosen the light rod clip to move the distance-start and stop the pumping unit. The cycle of reciprocating operations has a large workload and low work efficiency for employees, and there are certain safety risks in the operation. Summary of the invention

[0003] The present invention provides an automatic lifting and lowering device for a pumping unit bare rod, which overcomes the shortcomings of the above-mentioned prior art and can effectively solve the problems of the prior art that lifting the bare rod requires operators to reciprocately operate the pumping unit and the bare rod clamps, which is time-consuming and labor-intensive, has low construction efficiency, and poses safety hazards.

[0004] One of the technical solutions of the present invention is achieved through the following measures: an automatic lifting and lowering device for a pumping unit polished rod, comprising a polished rod, a first hydraulic polished rod clamp, a second hydraulic polished rod clamp, a top plate, and a hydraulic cylinder. The first hydraulic polished rod clamp and the second hydraulic polished rod clamp, which can hold the polished rod, are respectively provided at upper and lower intervals on the outer side of the polished rod. A top plate is provided on the outer side of the polished rod corresponding to the lower side position of the first hydraulic polished rod clamp, and a hydraulic cylinder is provided on the lower side of the top plate. The first hydraulic polished rod clamp, the second hydraulic polished rod clamp, and the hydraulic cylinder are respectively connected to the hydraulic pump.

[0005] The following are further optimizations and / or improvements to the above technical solutions: Two bidirectional hydraulic cylinders may be provided on the lower side of the top plate, a base is installed on the lower side of the bidirectional hydraulic cylinders, and the bidirectional hydraulic cylinders are connected to a dual-motor four-circuit hydraulic pump.

[0006] The above may also include a PLC controller, and the hydraulic pump is connected to the PLC controller.

[0007] The second technical solution of the present invention is achieved by the following measures: A method for using an automatic polished rod lifting and lowering device for an oil pumping unit is performed according to the following method: Step 1: Clamp the base onto the upper part of the wellhead cross-way, and install the bidirectional hydraulic cylinder, top plate, first hydraulic polished rod clamp, and second hydraulic polished rod clamp in sequence; Step 2: PLC controls the dual-motor four-circuit hydraulic pump, which pressurizes the first hydraulic polished rod clamp to make it hold the polished rod tightly, and pressurizes the bidirectional hydraulic cylinder to make its upper end extend upward, pushing the top plate up a certain distance, and the top plate pushes the first hydraulic polished rod clamp to pull the polished rod upward a certain distance; Step 3: PLC controls the dual-motor four-circuit hydraulic pump, which pressurizes the second hydraulic polished rod clamp to make it hold the polished rod tightly and maintain the lifting height of the polished rod. After a delay of two seconds, the first hydraulic polished rod clamp is controlled to release the polished rod, and the bidirectional hydraulic cylinder is controlled to retract downward, and the top plate falls; Step 4: Repeat steps 2 and 3 to lift the polished rod to the specified height, and use the original well polished rod clamp to tighten the pumping unit donkey head and the polished rod; Step 5: Disassemble the device, put it back on the inspection electric vehicle, and complete the light pole lifting operation.

[0008] The present invention has a reasonable and compact structure and is easy to use. It clamps or loosens the polished rod by arranging two hydraulically controlled hydraulic polished rod clamps, and lifts the top plate by raising the hydraulic cylinder to drive the polished rod upward. The action is repeated until the specified height is reached, which greatly reduces the workload of operators and reduces the safety hazards of close-range operations. It is safe, labor-saving, simple and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Attached Figure 1 It is a schematic diagram of the main structure of an embodiment of the present invention.

[0010] The codes in the accompanying drawings are: 1 is a polished rod, 2 is a first hydraulic polished rod clamp, 3 is a second hydraulic polished rod clamp, 4 is a top plate, 5 is a bidirectional hydraulic cylinder, 6 is a base, 7 is a dual-motor four-circuit hydraulic pump, 8 is a PLC controller, 9 is a wellhead upper four-way, and 10 is a wellhead packing box. DETAILED DESCRIPTION

[0011] The present invention is not limited by the following embodiments, and specific implementation methods can be determined based on the technical solution of the present invention and actual conditions.

[0012] In the present invention, for the convenience of description, the relative position relationship of each component is described according to the attached Figure 1 The positional relationships such as front, back, top, bottom, left, and right are described according to the layout directions of the drawings in the specification.

[0013] The present invention will be further described below in conjunction with embodiments and drawings: Embodiment 1: As attached Figure 1As shown, the automatic lifting and lowering device for the oil pumping unit polished rod includes a polished rod 1, a first hydraulic polished rod clamp 2, a second hydraulic polished rod clamp 2, a top plate 4, and a hydraulic cylinder. The first hydraulic polished rod clamp 2 and the second hydraulic polished rod clamp 2 that can hold the polished rod 1 are respectively provided at upper and lower intervals on the outer side of the polished rod 1. A top plate 4 is provided on the outer side of the polished rod 1 corresponding to the lower side position of the first hydraulic polished rod clamp 2. A hydraulic cylinder is provided on the lower side of the top plate 4. The first hydraulic polished rod clamp 2, the second hydraulic polished rod clamp 2, and the hydraulic cylinder are respectively connected to the hydraulic pump.

[0014] The first hydraulic polished rod clamp 2 and the second hydraulic polished rod clamp 2 are controlled by the hydraulic pump to hold or release the polished rod 1, and the hydraulic pump controls the upper end of the hydraulic cylinder to extend or retract upward, thereby repeating the operation to lift the polished rod 1 to a specified height.

[0015] According to actual needs, the above-mentioned automatic polished rod lifting and lowering device for oil pumping units can be further optimized and / or improved: Embodiment 2: As attached Figure 1 As shown, two bidirectional hydraulic cylinders 5 are provided on the lower side of the top plate 4, a base 6 is installed on the lower side of the bidirectional hydraulic cylinder 5, and the bidirectional hydraulic cylinder 5 is connected to a dual-motor four-circuit hydraulic pump 7. The lifting operation is performed by using the bidirectional hydraulic cylinder 5 and the dual-motor four-circuit hydraulic pump 7.

[0016] Embodiment 3: As attached Figure 1 As shown, a PLC controller 8 is also included, and a hydraulic pump is connected to the PLC controller 8. By designing different PLC programs, the dual-motor four-circuit hydraulic pump 7 is controlled to make the hydraulic cylinder move up or down, and the clamp of the hydraulic polished rod 1 is clamped or loosened, so as to realize the rise or fall of the position of the polished rod 1. By repeating the automatic execution of the action, the polished rod 1 can be lifted or lowered to a specified height according to the set program.

[0017] Embodiment 4: As attached Figure 1 As shown, the method of using the automatic lifting and lowering device for the oil pumping unit polished rod is as follows: The first step: clamp the base 6 on the upper part of the wellhead upper spool 9, and install the bidirectional hydraulic cylinder 5, the top plate 4, the first hydraulic polished rod clamp 2, and the second hydraulic polished rod clamp 2 in sequence; Step 2: PLC controls the dual-motor four-circuit hydraulic pump 7, which pressurizes the first hydraulic polished rod clamp 2 to make it hold the polished rod 1 tightly, and pressurizes the bidirectional hydraulic cylinder 5 to make its upper end extend upward, pushing the top plate 4 up a distance, and the top plate 4 pushes the first hydraulic polished rod clamp 2 to pull the polished rod 1 upward a distance; Step 3: PLC controls the dual-motor four-circuit hydraulic pump 7, which pressurizes the second hydraulic polished rod clamp 2 to make it hold the polished rod 1 tightly and keep the polished rod 1 lifted. After a delay of two seconds, the first hydraulic polished rod clamp 2 is controlled to release the polished rod 1, and the bidirectional hydraulic cylinder 5 is controlled to retract downward, and the top plate 4 falls. Step 4: Repeat steps 2 and 3 to lift the polished rod 1 to the specified height, and use the original well polished rod 1 clamp to tighten the pumping unit donkey head and polished rod 1; Step 5: Disassemble the device, put it back on the inspection electric vehicle, and complete the light pole 1 operation.

[0018] The PLC controller 8 can also use other automatic circuit systems to control motors and solenoid valves, and is not limited to PLC control.

[0019] The present invention uses the automatic rod lifting and lowering device for the oil pumping unit, so that one operator can realize the automatic lifting and lowering of the rod, instead of two employees using the oil pumping unit in conjunction with two rod clamps to complete the process of lifting and lowering the rod, making the lifting or hanging pumping operations safer, reducing the number of on-site operators, and reducing working time and work intensity.

[0020] 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 reduced according to actual needs to meet the requirements of different situations.

Claims

1. An automatic lifting and lowering device for a pumping unit polished rod, characterized in that It includes a polished rod, a first hydraulic polished rod clip, a second hydraulic polished rod clip, a top plate, and a hydraulic cylinder. The first hydraulic polished rod clip and the second hydraulic polished rod clip, which can hold the polished rod, are respectively provided at upper and lower intervals on the outer side of the polished rod. A top plate is provided on the outer side of the polished rod corresponding to the lower side position of the first hydraulic polished rod clip, and a hydraulic cylinder is provided on the lower side of the top plate. The first hydraulic polished rod clip, the second hydraulic polished rod clip, and the hydraulic cylinder are respectively connected to the hydraulic pump.

2. The automatic polished rod lifting and lowering device for an oil pumping unit according to claim 1 is characterized in that Two bidirectional hydraulic cylinders are arranged on the lower side of the top plate, a base is installed on the lower side of the bidirectional hydraulic cylinders, and the bidirectional hydraulic cylinders are connected to a dual-motor four-circuit hydraulic pump.

3. The automatic polished rod lifting and lowering device for an oil pumping unit according to claim 1 or 2, characterized in that It also includes a PLC controller, and the hydraulic pump is connected to the PLC controller.

4. A method for using the automatic polished rod lifting and lowering device of claim 3, characterized in that Proceed as follows: Step 1: Clamp the base onto the upper part of the wellhead cross-way, and install the bidirectional hydraulic cylinder, top plate, first hydraulic polished rod clamp, and second hydraulic polished rod clamp in sequence; Step 2: PLC controls the dual-motor four-circuit hydraulic pump, which pressurizes the first hydraulic polished rod clamp to make it hold the polished rod tightly, and pressurizes the bidirectional hydraulic cylinder to make its upper end extend upward, pushing the top plate up a certain distance, and the top plate pushes the first hydraulic polished rod clamp to pull the polished rod upward a certain distance; Step 3: PLC controls the dual-motor four-circuit hydraulic pump, which pressurizes the second hydraulic polished rod clamp to make it hold the polished rod tightly and maintain the lifting height of the polished rod. After a delay of two seconds, the first hydraulic polished rod clamp is controlled to release the polished rod, and the bidirectional hydraulic cylinder is controlled to retract downward, and the top plate falls; Step 4: Repeat steps 2 and 3 to lift the polished rod to the specified height, and use the original well polished rod clamp to tighten the pumping unit donkey head and the polished rod; Step 5: Disassemble the device, put it back on the inspection electric vehicle, and complete the light pole lifting operation.

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