Tower type pumping unit

Abstract

The utility model relates to a tower type pumping unit which comprises a tower, a power mechanism and a counter weight frame, the counter weight frame is arranged in the tower, the power mechanism is arranged above the counter weight frame, and the power mechanism and the counter weight frame synchronously move up and down relative to the tower. The pump hanging system comprises a tower frame, a counterweight frame is arranged on the tower frame, a head sheave assembly capable of turning over relative to the tower frame is arranged above the tower frame, the counterweight frame is connected with a sucker rod of the pump hanging system through a traction steel wire rope, and the traction steel wire rope winds around the head sheave assembly. The power mechanism is arranged on the outer side of the top of the tower, so that the gravity is unbalanced, potential safety hazards exist in high-altitude maintenance operation, and the pumping unit needs to be integrally moved during workover operation.

Description

Technical Field

[0001] The utility model belongs to the technical field of oilfield mining equipment, in particular to a tower type oil pumping unit. Background Art

[0002] Mechanical oil production is currently the most important oil production method. The walking beam pumping unit is the earliest and most commonly used pumping unit. The pumping unit is driven by a motor through a belt to drive a reducer. The two sides of the reducer power output shaft are connected to the rocker arm, and the rocker arm is equipped with a counterweight. The rocker arm is then actively connected to the walking beam through a connecting rod. The walking beam is supported by a support shaft with a fulcrum. The forearm of the beam has an arc-shaped donkey head, which drives the traction wire rope and then connects to the sucker rod. The pumping unit converts the motor power through the reducer and then drives the walking beam through the rocker arm to form a lever-like motion, so that the donkey head can move up and down, driving the wire rope and the sucker rod to reciprocate, thereby completing the oil pumping operation. This equipment has a complex structure, high maintenance rate, and high power consumption.

[0003] In recent years, linear pumping units, which are different from beam pumping units, have appeared in oil pumping equipment. Their main body is a tower structure, and the power source is a motor connected to a reducer through a coupling, and the reducer is then connected to a friction wheel through a coupling. When the motor rotates, the friction wheel drives the sucker rod connected to it up and down, thereby realizing oil production. This structure has the following problems: 1. The power mechanism uses a belt or chain as a power transmission method to drive the pumping rod. This is greatly affected by the external environment, resulting in unstable power output, rapid belt aging, short replacement cycle, and high replacement cost. The chain drive is affected by the outdoor environment, causing severe wear and tear, making maintenance difficult and unsuitable for use in tidal flat areas. 2. The power mechanism is located on the top and outside of the tower, which leads to gravity imbalance. The center of gravity is significantly offset from the center of the tower support point, resulting in unstable power output, large vibration, and loud noise. It is also extremely inconvenient to repair and replace wearing parts, and maintenance personnel need to work at height, which is extremely unsafe. 3. During well repair operations, the entire pumping unit must be moved backward or climbed to the top of the tower for high-altitude operations to meet the requirements of the workover vehicle hook to lift and lower underground objects. After the well is repaired, the entire pumping unit must be moved back to its original location. This not only affects the smooth progress of the well repair operation, but also places very strict requirements on the qualifications of operators, who must have a high-altitude operation permit, and also poses a safety hazard. Utility Model Content

[0004] In view of the various shortcomings of the existing technology, a tower-type oil pumping unit is proposed to solve the technical problems of the existing technology using belt or chain transmission, which is greatly affected by the environment, unstable power output, short life, high maintenance cost, the power mechanism is set on the top outside of the tower, resulting in gravity imbalance, safety hazards in high-altitude maintenance operations, and the need to move the oil pumping unit as a whole for well repair operations.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A tower-type oil pumping unit comprises a tower, a power mechanism and a counterweight frame, wherein the counterweight frame is arranged inside the tower, and the power mechanism is arranged above the counterweight frame and moves up and down synchronously with the counterweight frame relative to the tower;

[0007] A sheave assembly that can flip relative to the tower is provided above the tower, and the counterweight frame is connected to the sucker rod of the pump hanging system through a traction wire rope, and the traction wire rope passes around the sheave assembly.

[0008] The technical solution is further configured such that the power mechanism includes a power drive source and a guide wire rope, and the top and bottom of the tower are respectively connected to the power drive source through the guide wire rope;

[0009] The power mechanism and the counterweight frame are synchronously moved up and down by the forward and reverse rotation of the power driving source.

[0010] The present technical solution is further configured as follows: the guide wire rope includes an upper guide wire rope and a lower guide wire rope, the first end of the upper guide wire rope is connected to the top beam of the tower, the second end of the upper guide wire rope is transmission-connected to the power drive source, the first end of the lower guide wire rope is transmission-connected to the power drive source, and the second end of the lower guide wire rope is connected to the bottom beam of the tower.

[0011] The technical solution is further configured to further include a tensioning mechanism, wherein the tensioning mechanism is arranged on the tower, and the ends of the guide wire rope are respectively connected to the tensioning mechanism and the power driving source.

[0012] The technical solution is further configured as follows: the power drive source includes a motor and a winch, the output end of the motor is transmission-connected to the input end of the winch via a coupling, a brake is provided on the coupling, and the guide wire rope is wound around the winch.

[0013] The technical solution is further configured as follows: a running guide rail is provided on the tower, and guide rollers that can slide along the running guide rail are provided on both sides of the counterweight frame.

[0014] The technical solution is further configured as follows: the head sheave assembly includes a turning frame, a transition wheel and a cantilever wheel; the first end of the turning frame is hinged to the tower, the second end of the turning frame serves as a free end, and the transition wheel and the cantilever wheel are rotatably connected to the turning frame respectively;

[0015] The first end of the traction steel wire rope is connected to the counterweight frame, and the second end of the traction steel wire rope passes through the transition wheel and the cantilever wheel in sequence and is connected to the sucker rod.

[0016] The technical solution is further configured such that the turnover frame is detachably connected to the counterweight frame via a turnover wire rope;

[0017] In the working state, the flipping wire rope is disconnected from the counterweight frame, and the free end of the flipping frame extends horizontally to the outside of the tower; in the well repair state, the flipping wire rope is connected to the counterweight frame, and the flipping wire rope drives the flipping frame to flip, causing the second end of the flipping frame to be retracted into the cross-sectional range of the tower.

[0018] The technical solution is further configured such that an assembly platform is provided at the bottom of the tower, and a folding slide rail is provided on the outside of the tower that can be flipped relative to the tower;

[0019] When the folding slide rail is in the unfolded state, it is flush with the assembly platform.

[0020] The technical solution is further configured such that multiple sets of traction wire ropes can be provided, the cross-section of the tower can be configured to be triangular, rectangular or hexagonal, and the counterweight frame can be connected to multiple sucker rods in multiple directions at the same time, thereby enabling a single frame to simultaneously produce oil from multiple oil wells.

[0021] The beneficial effects of the utility model are:

[0022] The use of traction wire rope as the power transmission element has the advantages of high transmission efficiency, durability, low use and maintenance costs; the power mechanism and counterweight frame are integrated into one, and the weight of the power mechanism itself is used as part of the counterweight to achieve weight balance with the sucker rod, reduce the use of counterweight blocks, save resources, and reduce energy consumption. At the same time, even if the end load of the sucker rod is removed, the counterweight frame can still be raised and lowered normally alone, and the pump hanging system can be independently installed and disassembled without the need for an additional crane. It is simple and practical; the use of a reversible sheave assembly means that when repairing the well, the tower does not need to be moved to leave enough space for the well repair operation, and there is no need to use a crane to assist in lifting. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a front view of a tower-type oil pumping unit according to an embodiment of the present utility model;

[0024] Figure 2 It is a side view of a tower type oil pumping unit in an embodiment of the present utility model;

[0025] Figure 3 This is a schematic diagram of the folding slide rail in the embodiment of the utility model in the unfolded state;

[0026] Figure 4 yes Figure 2 Partial schematic diagram at point A in the middle.

[0027] In the attached figure: 1. tower; 2. sucker rod; 3. counterweight frame; 4. motor; 5. winch; 6. traction wire rope; 7. upper guide wire rope; 8. lower guide wire rope; 9. flip wire rope; 10. flip frame; 11. transition wheel; 12. cantilever wheel; 13. assembly platform; 14. folding slide rail; 15. sliding trolley; 16. guide wheel; 17. screw; 18. nut; 19. compression spring. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the technical solution of the present invention, the following is a clear and complete description of the technical solution of the present invention in conjunction with the drawings of the present invention. Based on the embodiments in this application, other similar embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of this application. In addition, the directional terms mentioned in the following embodiments, such as "up", "down", "left", "right", etc., are only referenced to the directions of the drawings. Therefore, the directional terms used are used to illustrate rather than limit the invention.

[0029] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0030] According to the embodiment of the present invention, a tower type oil pumping unit is provided. Figures 1 to 3 , comprising a tower 1, a power mechanism and a counterweight frame 3, wherein the counterweight frame 3 is arranged inside the tower 1, the power mechanism is arranged above the counterweight frame 3 and is fixed to the counterweight frame 3 with bolts, and the power mechanism and the counterweight frame 3 can move up and down synchronously relative to the tower 1;

[0031] A sheave assembly that can flip relative to the tower 1 is provided above the tower 1, and the counterweight frame 3 is connected to the sucker rod 2 of the pump hanging system through a traction wire rope 6, and the traction wire rope 6 passes around the sheave assembly.

[0032] It should be noted that the use of traction wire rope 6 as a power transmission element has the advantages of high transmission efficiency, durability, low use and maintenance costs, and can meet the use requirements of various complex geological environments such as wind resistance, mudflats, low temperature, high temperature, etc., and expands the application range of the oil pump; the power mechanism and the counterweight frame 3 are integrated into one, and the weight of the power mechanism itself is used as part of the counterweight to achieve weight balance with the sucker rod 2, reducing the use of counterweight blocks, saving resources, and reducing energy consumption; at the same time, even if the end load of the sucker rod is removed, the counterweight frame 3 can still be normally lifted and lowered independently, and the pump hanging system can be independently installed and disassembled without the cooperation of an additional crane, which is simple and practical; a reversible sheave assembly is used, and when repairing the well, the tower 1 does not need to be moved to leave enough space for the well repair operation, and there is no need to use a crane to assist in lifting; the power mechanism and the counterweight frame 3 are arranged inside the tower 1, with a compact structure and a small footprint.

[0033] In the tower type pumping unit of this embodiment, please refer to Figures 1 to 3 The power mechanism includes a power driving source and a guide wire rope, and the top and bottom of the tower 1 are respectively connected to the power driving source through the guide wire rope;

[0034] The power mechanism and the counterweight frame 3 are synchronously moved up and down by the forward and reverse rotation of the power driving source.

[0035] It should be noted that, by the forward and reverse rotation of the power driving source, the guide wire rope connected to the top and bottom of the tower 1 is driven to retract or release the rope, thereby realizing the synchronous up and down movement of the power mechanism and the counterweight frame 3 along the tower 1; the counterweight frame 3 can adopt a stacked counterweight block to form the counterweight, and the counterweight can be increased or decreased at any time according to the depth of the oil well and the weight of the pump hanging system. During the process of the counterweight frame 3 moving up and down along the tower 1, the sucker rod 2 is driven to move back and forth up and down by the traction wire rope 6 to realize the oil production operation.

[0036] Specifically, the guide wire rope includes an upper guide wire rope 7 and a lower guide wire rope 8. The first end of the upper guide wire rope 7 is connected to the top beam of the tower 1, and the second end of the upper guide wire rope 7 is connected to the power drive source. The first end of the lower guide wire rope 8 is connected to the power drive source, and the second end of the lower guide wire rope 8 is connected to the bottom beam of the tower 1.

[0037] It should be noted that both the upper guide wire rope 7 and the lower guide wire rope 8 use a double wire rope traction form, which greatly improves the safety factor and ensures work safety in all aspects.

[0038] In the tower type pumping unit of this embodiment, please refer to Figures 1 to 4 , and also includes a tensioning mechanism, which is arranged on the tower 1, and the ends of the guide wire rope are respectively connected to the tensioning mechanism and the power driving source.

[0039] It should be noted that the tension of the guide wire rope is adjusted by providing a tensioning mechanism. Specifically, the tensioning mechanism includes a screw 17, a nut 18, and a compression spring 19. The first end of the screw 17 passes through the tower 1 and is connected to the nut 18. The compression spring 19 is sleeved around the outer periphery of the screw 17. The second end of the screw 17 is provided with a connection hole for connecting to the guide wire rope. By turning the screw 17, the compression of the compression spring 19 is adjusted to achieve the purpose of adjusting the tension of the guide wire rope. In this embodiment, the first end of the lower guide wire rope 8 is connected to the counterweight frame 3, and its second end passes around the guide wheel 16 to connect to the tensioning mechanism. The tensioning mechanism is provided on the bottom beam of the tower 1.

[0040] In the tower type pumping unit of this embodiment, please refer to Figures 1 to 3 The power driving source includes a motor 4 and a winch 5. The output end of the motor 4 is connected to the input end of the winch 5 through a coupling. A brake is provided on the coupling. The guide wire rope is wound around the winch 5.

[0041] It should be noted that a brake is provided on the coupling, which can brake immediately when an accident such as a guide wire rope breakage or a sucker rod tripping occurs, thus ensuring work safety in all directions. Preferably, the motor 4 is a permanent magnet variable frequency motor.

[0042] In the tower type pumping unit of this embodiment, please refer to Figures 1 to 3 The tower 1 is provided with a running guide rail, and both sides of the counterweight frame 3 are provided with guide rollers that can slide along the running guide rail.

[0043] It should be noted that the running guide rail cooperates with the guide roller to play an auxiliary guiding role during the movement of the counterweight frame 3.

[0044] In the tower type pumping unit of this embodiment, please refer to Figures 1 to 3 The head wheel assembly includes a turning frame 10, a transition wheel 11 and a cantilever wheel 12. The first end of the turning frame 10 is hinged to the tower 1, and the second end of the turning frame 10 serves as a free end. The transition wheel 11 and the cantilever wheel 12 are rotatably connected to the turning frame 10 respectively.

[0045] The first end of the traction wire rope 6 is connected to the counterweight frame 3 , and the second end of the traction wire rope 6 passes through the transition wheel 11 and the cantilever wheel 12 in sequence and is connected to the sucker rod 2 .

[0046] It should be noted that the transition wheel 11 and the cantilever wheel 12 play a transition and reversing role for the traction wire rope 6; when the pumping unit is working, the motor 4 drives the winch 5 to rotate, and when the sucker rod 2 moves upward, the lower guide wire rope 8 is gradually wound on the outer circumference of the winch 5 to achieve rope collection, and the winch 5 gradually guides the upper guide wire rope 7 to achieve rope release, and the counterweight frame 3 moves downward along the tower 1; when the sucker rod 2 moves downward, the upper guide wire rope 7 is gradually wound on the outer circumference of the winch 5 to achieve rope collection, and the winch 5 gradually guides the lower guide wire rope 8 to achieve rope release, and the counterweight frame 3 moves upward along the tower 1; through the up and down movement of the counterweight frame 3, the sucker rod 2 is driven to reciprocate up and down, realizing a long stroke and low stroke frequency of the pumping unit, improving the mechanical efficiency of the pumping unit, and being suitable for the heavy load, strong pumping and intermittent pumping of oil and gas wells, high wax content wells, medium and high water content large displacement wells and low permeability wells.

[0047] In the tower type pumping unit of this embodiment, please refer to Figures 1 to 3 , the turnover frame 10 is detachably connected to the counterweight frame 3 via a turnover wire rope 9;

[0048] In the working state, the flipping wire rope 9 is disconnected from the counterweight frame 3, and the free end of the flipping frame 10 extends horizontally to the outside of the tower 1; in the well repair state, the flipping wire rope 9 is connected to the counterweight frame 3, and the flipping wire rope 9 drives the flipping frame 10 to flip, causing the second end of the flipping frame 10 to be retracted into the cross-sectional range of the tower 1.

[0049] It should be noted that, in the working state, the turning frame 10 is exposed, and the supporting transition wheel 11 and the cantilever wheel 12 drive the traction wire rope 6 to complete the up and down reciprocating motion to achieve the purpose of oil production; in the well repair state, the counterweight frame 3 moves upward, and the second end of the turning frame 10 is retracted into the cross-sectional range of the tower 1 by the turning wire rope 9, driving the sucker rod 2 and the pump hanging system to move horizontally, leaving enough space for the well repair operation, so that the well repair operation can be carried out smoothly; after the well repair is completed, the turning frame 10 is flipped in the opposite direction to return to the working state.

[0050] In the tower type pumping unit of this embodiment, please refer to Figures 1 to 3 The bottom of the tower 1 is provided with an assembly platform 13, and the outside of the tower 1 is provided with a folding slide rail 14 that can be flipped relative to it;

[0051] When the folding slide rail 14 is in the unfolded state, it is flush with the assembly platform 13 .

[0052] It should be noted that when the folding slide rail 14 is in the unfolded state, it is flush with the assembly platform 13, and the counterweight frame 3 and the power drive source can be assembled into the interior of the tower 1 through the sliding trolley 15; after the assembly is completed, the folding slide rail 14 is flipped over for storage.

[0053] In the tower type pumping unit of this embodiment, please refer to Figures 1 to 3 The traction wire rope 6 can be provided in multiple sets, the cross section of the tower 1 is set to be triangular, rectangular or hexagonal, and the counterweight frame 3 can be connected to multiple sucker rods 2 in multiple directions at the same time, so that multiple oil wells can be produced at the same time by one frame.

[0054] It should be noted that, by using one power drive source, one counterweight frame 3 and one tower frame 1, multiple oil wells can be produced at the same time, avoiding the installation of a large number of ground facilities at the wellhead of the oil field, thereby reducing the cost of oil production; when one of the oil wells fails, it does not affect the normal production of other oil wells. While normal production is continuing, the failed oil well can be operated and repaired, thereby improving work efficiency; supplemented by PLC automatic control, remote operation, intelligent operation, etc. can be realized.

[0055] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not limit the scope of implementation of the present invention. All equivalent changes and modifications made within the scope of this application should still fall within the scope of the present invention.

Claims

1. A tower type pumping unit, characterized in that: The utility model comprises a tower, a power mechanism and a counterweight frame, wherein the counterweight frame is arranged inside the tower, and the power mechanism is arranged above the counterweight frame and moves up and down synchronously with the counterweight frame relative to the tower; A sheave assembly that can flip relative to the tower is provided above the tower, and the counterweight frame is connected to the sucker rod of the pump hanging system through a traction wire rope, and the traction wire rope passes around the sheave assembly.

2. The tower type pumping unit according to claim 1, characterized in that: The power mechanism includes a power drive source and a guide wire rope, and the top and bottom of the tower are respectively connected to the power drive source through the guide wire rope; The power mechanism and the counterweight frame are synchronously moved up and down by the forward and reverse rotation of the power driving source.

3. The tower type pumping unit according to claim 2, characterized in that: The guide wire rope includes an upper guide wire rope and a lower guide wire rope, the first end of the upper guide wire rope is connected to the top beam of the tower, the second end of the upper guide wire rope is transmission-connected to the power drive source, the first end of the lower guide wire rope is transmission-connected to the power drive source, and the second end of the lower guide wire rope is connected to the bottom beam of the tower.

4. The tower type pumping unit according to claim 2 or 3, characterized in that: It also includes a tensioning mechanism, which is arranged on the tower, and the ends of the guide wire rope are respectively connected to the tensioning mechanism and the power driving source.

5. The tower type pumping unit according to claim 2, characterized in that: The power driving source includes a motor and a winch. The output end of the motor is transmission-connected to the input end of the winch through a coupling. A brake is provided on the coupling. The guide wire rope is wound around the winch.

6. The tower type pumping unit according to claim 1, characterized in that: The tower is provided with a running guide rail, and both sides of the counterweight frame are provided with guide rollers that can slide along the running guide rail.

7. The tower type pumping unit according to claim 1, characterized in that: The head sheave assembly includes a turning frame, a transition wheel and a cantilever wheel. The first end of the turning frame is hinged to the tower, the second end of the turning frame serves as a free end, and the transition wheel and the cantilever wheel are rotatably connected to the turning frame respectively. The first end of the traction steel wire rope is connected to the counterweight frame, and the second end of the traction steel wire rope passes through the transition wheel and the cantilever wheel in sequence and is connected to the sucker rod.

8. The tower type pumping unit according to claim 7, characterized in that: The turning frame is detachably connected to the counterweight frame via a turning wire rope; In the working state, the flipping wire rope is disconnected from the counterweight frame, and the free end of the flipping frame extends horizontally to the outside of the tower; in the well repair state, the flipping wire rope is connected to the counterweight frame, and the flipping wire rope drives the flipping frame to flip, causing the second end of the flipping frame to be retracted into the cross-sectional range of the tower.

9. The tower type pumping unit according to claim 1, characterized in that: The bottom of the tower is provided with an assembly platform, and the outside of the tower is provided with a folding slide rail that can be flipped relative to the tower; When the folding slide rail is in the unfolded state, it is flush with the assembly platform.

10. The tower type pumping unit according to claim 1, characterized in that: The traction wire ropes can be provided in multiple sets, the cross section of the tower can be set to be triangular, rectangular or hexagonal, and the counterweight frame can be connected to multiple sucker rods in multiple directions at the same time, so that multiple oil wells can be produced simultaneously by one frame.

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