Oil pumping plunger assembly, oil well pump and oil extraction vehicle

Abstract

The invention provides an oil pumping plunger assembly, an oil well pump and an oil production truck, and relates to the technical field of oil field oil production, the oil pumping plunger assembly comprises an oil pumping rod and a plunger, a counterweight part is arranged at the bottom of the plunger, the lower end of the oil pumping rod is rotatably connected with the plunger, and the oil pumping plunger assembly further comprises a rotating mechanism and a first anchoring mechanism; the rotating mechanism is used for driving the plunger to rotate relative to the oil pipe; the first anchoring mechanism comprises a second motor, a first screw rod, a first connecting seat and a connecting rod assembly, one end of the connecting rod assembly is hinged to the outer wall of the sucker rod, the other end of the connecting rod assembly movably enters the sucker rod and is hinged to the first connecting seat, and the first anchoring mechanism ensures that the sucker rod is firmly fixed in an oil pipe in the rotating process of the plunger; and when the plunger and an oil pipe are clamped, sand grain deposition between the plunger and the oil pipe can be effectively broken through through rotation of the plunger, friction force caused by sand grain accumulation is reduced, and therefore the pump clamping phenomenon is effectively relieved.

Description

Technical Field

[0001] The invention relates to the technical field of oil and natural gas extraction, and in particular to an oil pumping plunger assembly, an oil pump and an oil extraction vehicle. Background Art

[0002] In the field of oil extraction, the oil pump system is a common downhole oil production equipment, among which the rod pump is widely used in the production process of oil wells. The rod pump is driven by the ground power device through the sucker rod to drive the plunger to reciprocate up and down in the oil well tubing, thereby extracting crude oil. The system usually relies on the oil production vehicle to connect with the wire rope, and uses the wire rope to pull the sucker rod of the oil pump and control the up and down stroke of the plunger.

[0003] However, in actual applications, downhole oil usually contains solid impurities of different particle sizes, such as sand particles, rock cuttings, etc., which may enter the oil well with the oil. As long-term oil production operations proceed, these solid particles may be deposited between the plunger and the oil pipe, resulting in increased friction between the plunger and the oil pipe, and even the plunger getting stuck. In severe cases, the oil pump system cannot work properly. Especially during the operation of the rod pump, the problem of the plunger and the oil pipe getting stuck is an important factor affecting production efficiency and equipment safety.

[0004] Traditionally, the stuck pump problem is usually solved by pulling up and down with a wire rope. However, this method relies only on pulling up and down, and cannot effectively remove impurities and sand between the plunger and the oil pipe. In the case of a large amount of sand or deep sedimentation, pulling alone may not be enough to remove all stuck materials, and may even increase friction, making the plunger and oil pipe stuck more seriously. In addition, the traditional unblocking method relies only on pulling with a wire rope. Excessive pulling force may also have a large impact on other parts of the oil pump, and even cause equipment damage, resulting in production stagnation. Therefore, existing solutions cannot effectively solve the problem of plunger sticking, especially when there is a large amount of sand or the oil well environment is harsh. Summary of the invention

[0005] In view of this, the present invention proposes an oil pumping plunger assembly, an oil pump and an oil production vehicle, which can solve the problem in the prior art that the plunger and the oil pipe cannot be effectively unblocked by pulling with a wire rope.

[0006] The technical solution of the present invention is achieved in this way:

[0007] On the one hand, the present invention provides an oil pumping plunger assembly, which includes an oil pumping rod and a plunger, a counterweight is provided at the bottom of the plunger, the lower end of the oil pumping rod is rotatably connected to the plunger, and also includes a rotating mechanism and a first anchoring mechanism;

[0008] The rotating mechanism comprises a first motor, a gear and a toothed disc, an oil inlet chamber is provided inside the plunger, a floating valve is provided at the bottom of the oil inlet chamber, the first motor is arranged inside the sucker rod, the toothed disc is fixedly arranged at the top of the oil inlet chamber, the output shaft of the first motor penetrates into the oil inlet chamber, and is meshed and connected with the toothed disc through the gear;

[0009] The first anchoring mechanism includes a second motor, a first screw, a first connecting seat and a connecting rod assembly, the second motor is arranged inside the sucker rod, the first screw is rotatably arranged inside the sucker rod, and the output shaft of the second motor is fixedly connected to the first screw, the first connecting seat is threadedly connected to the first screw, and a plurality of connecting rod assemblies are evenly arranged around the central axis of the sucker rod, one end of the connecting rod assembly is hinged to the outer wall of the sucker rod, and the other end is movable into the inside of the sucker rod and is hinged to the first connecting seat, and the connecting rod assembly can be unfolded relative to the sucker rod to anchor the inner wall of the oil pipe.

[0010] On the basis of the above technical solution, preferably, the connecting rod assembly includes a first connecting rod and a second connecting rod, the sucker rod has an installation cavity inside, the first screw rod and the first connecting seat are arranged in the installation cavity, the side wall of the sucker rod is provided with a mounting hole connected to the installation cavity, the lower end of the first connecting rod is hinged to the upper end of the second connecting rod, the lower end of the second connecting rod is hinged to the outer wall of the sucker rod, and the upper end of the first connecting rod passes through the installation hole and is hinged to the first connecting seat.

[0011] On the basis of the above technical solution, preferably, the connecting rod assembly also includes a supporting member, both ends of which are hinged to the upper end of the second connecting rod and the lower end of the first connecting rod respectively, and the side of the supporting member away from the sucker rod has an supporting portion with an arc-shaped structure.

[0012] On the basis of the above technical solution, preferably, a spiral groove is provided on the outer peripheral surface of the plunger, the lower end opening of the spiral groove extends to the bottom surface of the plunger, the top surface of the plunger has an oil outlet hole connected to the upper end opening of the spiral groove, and a one-way valve is provided at the oil outlet hole.

[0013] In a second aspect, the present invention discloses an oil pump, which includes the oil pumping plunger assembly described in the first aspect, and also includes an oil pipe and a pump barrel. The pump barrel is fixedly arranged at the lower end of the oil pipe, and a fixed valve is arranged at the bottom of the pump barrel. The oil pumping plunger assembly is arranged in the oil pipe, and the plunger is slidably connected to the inner wall of the oil pipe. A sand prevention structure is also arranged between the pump barrel and the oil pipe.

[0014] On the basis of the above technical scheme, preferably, the sand-proof structure includes a cylinder and a sand-proof plate, the bottom end of the cylinder is closed, the upper end of the cylinder is fixedly connected to the bottom end of the pump barrel, a plurality of sand-proof plates are provided, which are arranged between the cylinder and the oil pipe at equal intervals along the axial direction of the cylinder, the sand-proof plate is an inclined annular structure, the lower end of the sand-proof plate is fixedly connected to the cylinder, an oil inlet gap is provided between the upper end of the sand-proof plate and the oil pipe, a plurality of oil inlets are provided at the connection between the cylinder and the sand-proof plate, and a filter is provided on the oil inlet.

[0015] On the basis of the above technical solution, preferably, a plurality of exhaust holes are provided on the side wall of the oil pipe corresponding to the pump barrel and the adjacent sand control plates.

[0016] On the basis of the above technical scheme, preferably, a second anchoring mechanism is fixedly provided on the side wall at the lower end of the oil pipe, the second anchoring mechanism comprises a mounting sleeve, a fixing seat, a driving assembly, a second connecting seat and a plurality of rib assemblies, the mounting sleeve is fixedly provided on the outer side wall of the lower end of the oil pipe, the mounting sleeve comprises a fixing section and a sliding section connected to each other, the fixing section is located above the sliding section, and the diameter of the sliding section is smaller than the diameter of the fixing section, the fixing seat is fixedly installed on the outer peripheral wall of one end of the sliding section away from the fixing section, the second connecting seat is sleeved on the outer peripheral side of the sliding section, a plurality of rib assemblies are evenly and respectively provided on the outer peripheral side of the sliding section, one end of the rib assembly is hingedly connected to the second connecting seat, and the other end is hingedly connected to the fixing seat, and a plurality of driving assemblies are evenly and respectively provided in the fixing section, the driving assembly is used to drive the second connecting seat to slide along the axial direction of the sliding section, so as to drive the rib assembly to open outward relative to the sliding section to anchor the well wall.

[0017] On the basis of the above technical solution, preferably, an accommodating chamber is provided in the fixed section, and the driving assembly comprises a third motor, a second screw rod, a nut seat and a driving rod arranged in the accommodating chamber, the second screw rod rotates along the axial direction of the fixed section and is arranged in the accommodating chamber, the output shaft of the third motor is fixedly connected to one end of the second screw rod, the nut seat is threadedly connected to the second screw rod, one end of the driving rod is fixedly connected to the nut seat, and the other end movably passes through the outside of the fixed section and is fixedly connected to the second connecting seat;

[0018] The rib assembly includes a first rib rod, a second rib rod and an anchor. The first rib rod and the second rib rod are hinged to the anchor respectively. One end of the first rib rod away from the anchor is hinged to the second connecting seat, and one end of the second rib rod away from the anchor is hinged to the fixing seat.

[0019] In the third aspect, the present invention discloses an oil production vehicle, including a chassis, a winch and a derrick arranged on the chassis, a steel wire rope is wound around the end of the derrick, one end of the steel wire rope is connected to the winch, and the other end is used for detachable and fixed connection with the sucker rod in the oil pump described in the second aspect.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] (1) The pumping plunger assembly disclosed in the present invention provides rotational power through a first motor, and transmits power to the plunger through gears and toothed discs, thereby realizing the rotation of the plunger relative to the oil pipe. When the plunger and the oil pipe are stuck, the rotation of the plunger can effectively break the sand deposits between the plunger and the oil pipe, reduce the friction caused by the accumulation of sand, and effectively release the pump from being stuck. In addition, the second motor drives the first screw to rotate, driving the first connecting seat to move along the screw direction, and the connecting rod assembly can be unfolded and contact the inner wall of the oil pipe to achieve anchoring, thereby ensuring that the pump rod is firmly fixed in the oil pipe during the rotation of the plunger, avoiding the pump rod from rotating when the plunger rotates, and thus preventing unnecessary rotation of the wire rope. This structural design effectively ensures the smooth progress of the pump jam release operation and improves the stability and efficiency of the pump.

[0022] (2) By providing a support member on the connecting rod assembly, the support portion of the arc-shaped structure can better contact the inner wall of the oil pipe, increase the friction and contact area, and thus enhance the anchoring effect of the connecting rod assembly. The arc-shaped design can adapt to the inner wall curve of the oil pipe, provide more uniform support force, so that the sucker rod will not slip or dislocate during the rotation of the plunger or other operations, ensuring the smooth release of the stuck pump. In addition, the arc-shaped support portion structure can form a relatively flat contact surface when in contact with the oil pipe, reduce direct impact or sharp friction, reduce mechanical wear, and extend the service life of the connecting rod assembly and other key components.

[0023] (3) By providing a spiral groove on the outer surface of the plunger, when the plunger performs a downward stroke, most of the oil in the oil pipe will enter the oil inlet chamber of the plunger through the floating valve, and then flow from the oil inlet chamber to the upper end of the plunger. In addition, a small portion of the oil will enter the spiral groove and flow upward along the spiral groove through the oil outlet hole to the upper end of the plunger. In this process, sand particles in the oil will flow along the spiral groove to the upper end of the plunger. The spiral groove guides the flow of oil and the discharge of sand particles, thereby avoiding the accumulation of sand particles between the contact surface of the plunger and the oil pipe, and reducing the occurrence of jamming between the plunger and the oil pipe due to sand particles.

[0024] (4) By setting up a sand-proof structure and setting the sand-proof plate as an inclined ring structure, the oil is guided in a certain direction during the flow process, and the heavier sand particles have a greater chance of settling to the bottom along the inclined surface during this process, reducing the situation where sand particles pass through the oil inlet gap with the flow of oil, thereby reducing the situation where sand particles enter the cylinder through the oil inlet; in addition, the sand-proof plate is annular, and its shape helps to form a multi-level flow path and layered filtration. When the oil flows through these annular structures, it is not only affected by the inclination, but also diverted through multiple layers of the annular plate, producing a stronger filtering effect. The annular structure helps to slow down the flow rate of the oil, allowing the sand particles enough time to settle and separate.

[0025] (5) Through the setting of the anti-sand structure, when pumping oil, the plunger moves upward to generate negative pressure, causing the fixed valve to open. Under the action of negative pressure, the oil flows along the anti-sand plate and flows upward through the oil inlet gap. After the oil-gas mixture passes through the oil inlet gap, the oil and gas are gradually separated, and the gas in the oil floats upward and is discharged from the exhaust hole. The oil enters the cylinder through the oil inlet. Since the position of the oil inlet is lower than the upper end of the anti-sand plate, the gas will not enter the cylinder, nor will it enter the oil pipe, thereby achieving oil and gas separation and exhaust, preventing gas from entering the oil pump and causing gas lock of the oil pump.

[0026] (6) Through the setting of the second anchoring mechanism, when the driving assembly drives the second connecting seat to move, it will guide the deployment of the umbrella rib assembly, thereby realizing anchoring to the well wall. Multiple umbrella rib assemblies form an umbrella-like structure to provide support and anchoring to the well wall. The design of the umbrella rib assembly enables the structure to effectively increase the contact area with the well wall when it is deployed, enhance stability, thereby avoiding free swinging or deviation of the oil pipe, reducing the risk of plunger jamming, ensuring the smooth operation of the oil pump, reducing friction contact with equipment such as wire ropes, and extending the life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a three-dimensional structural schematic diagram of the oil pumping plunger assembly disclosed in the present invention;

[0029] Figure 2 It is a schematic plan view of the assembly structure of the steel wire rope and the oil pumping plunger assembly disclosed in the present invention;

[0030] Figure 3 for Figure 2 A partial enlarged view of the middle part;

[0031] Figure 4 for Figure 2 A partial enlarged view of point B in the middle;

[0032] Figure 5 It is a schematic diagram of the planar structure of the oil well pump disclosed in the present invention;

[0033] Figure 6 for Figure 5 A partial enlarged view of point C in the middle;

[0034] Figure 7It is a three-dimensional structural schematic diagram of the oil well pump disclosed in the present invention;

[0035] Figure 8 It is a schematic plan view of the assembly structure of the oil pipe and the second anchoring mechanism disclosed in the present invention;

[0036] Fig. 9 It is a schematic diagram of the assembly structure of the oil pump disclosed in the present invention in a wellbore;

[0037] Fig.10 It is a schematic diagram of the plan structure of the oil production vehicle disclosed in the present invention;

[0038] Fig.11 It is a schematic diagram of the assembly structure of the oil production vehicle and the oil pump disclosed in the present invention;

[0039] Reference numerals:

[0040] 1. Pumping plunger assembly; 11. Pumping rod; 12. Plunger; 13. Counterweight; 14. Rotating mechanism; 15. First anchoring mechanism; 141. First motor; 142. Gear; 143. Toothed disc; 121. Oil inlet chamber; 122. Traveling valve; 151. Second motor; 152. First screw rod; 153. First connecting seat; 154. Connecting rod assembly; 1541. First connecting rod; 1542. Second connecting rod; 111. Mounting chamber; 112. Mounting hole; 1543. Abutment; 1544. Abutment; 123. Spiral groove; 124. Oil outlet hole; 125. One-way valve;

[0041] 2. Oil pump; 21. Oil pipe; 22. Pump barrel; 23. Fixed valve; 24. Anti-sand structure; 241. Cylinder; 242. Anti-sand plate; 240. Oil inlet gap; 2410. Oil inlet; 2411. Filter; 211. Exhaust hole; 25. Second anchoring mechanism; 251. Mounting sleeve; 252. Fixed seat; 253. Drive assembly; 254. Second connecting seat; 255. Umbrella rib assembly; 2511. Fixed section; 2512. Sliding section; 2511a. Accommodating chamber; 2531. Third motor; 2532. Second screw rod; 2533. Nut seat; 2534. Drive rod; 2551. First rib rod; 2552. Second rib rod; 2553. Anchor piece;

[0042] 3. Oil production vehicle; 31. Chassis; 32. Winch; 33. Derrick; 34. Wire rope; G. Wellbore. DETAILED DESCRIPTION

[0043] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] Embodiment 1

[0045] like Figure 1 As shown, combined Figure 2-4 The embodiment of the present invention discloses a plunger assembly of an oil pump, including a sucker rod 11 and a plunger 12 , wherein a counterweight 13 is disposed at the bottom of the plunger 12 .

[0046] In the prior art, the steel wire rope 34 of the oil production vehicle 3 is connected to the plunger 12 through the sucker rod 11. The plunger 12 is pulled up and down in the oil pipe 21 by the steel wire rope 34, and cooperates with the pump barrel 22 at the bottom of the oil pipe 21 to realize downhole oil pumping operations. The counterweight 13 provides gravity loading when the plunger 12 sinks, so that the plunger 12 can effectively sink to the bottom of the oil pipe 21.

[0047] Since downhole oil usually contains solid impurities of different particle sizes, such as sand particles, rock cuttings, etc., these impurities may enter the oil well along with the oil. As long-term oil production operations proceed, these solid particles may be deposited between the plunger 12 and the oil pipe 21, resulting in increased friction between the plunger 12 and the oil pipe 21, and even the plunger 12 may get stuck.

[0048] Traditionally, the stuck pump problem is usually solved by pulling up and down the wire rope 34. However, this method only relies on pulling up and down, and cannot effectively remove the impurities and sand between the plunger 12 and the oil pipe 21. In the case of a large amount of sand or deep sedimentation, pulling alone may not be enough to remove all the stuck materials, and may even increase friction, making the stuck phenomenon of the plunger 12 and the oil pipe 21 more serious. In addition, the traditional unblocking method only relies on pulling up the wire rope 34. Excessive pulling force may also have a large impact on other components of the oil pump 2, and even cause equipment damage, resulting in production stagnation.

[0049] In order to solve the above problem, the solution adopted by the present invention is that the lower end of the sucker rod 11 disclosed in the present invention is rotatably connected to the plunger 12 , and the entire sucker plunger assembly also includes a rotating mechanism 14 and a first anchoring mechanism 15 .

[0050] Among them, the plunger 12 has an oil inlet chamber 121 inside, and a swimming valve 122 is provided at the bottom of the oil inlet chamber 121. When the plunger 12 moves downward in the oil pipe 21, the swimming valve 122 opens, and the oil in the oil pipe 21 enters the oil inlet chamber 121 through the swimming valve 122. When the plunger 12 moves upward in the oil pipe 21, the swimming valve 122 closes, and the oil is lifted to the oil outlet of the oil pipe 21. At the same time, the plunger 12 generates suction on the inside of the oil pipe 21, so that the oil in the wellbore enters the oil pipe 21 through the oil pump.

[0051] The rotating mechanism 14 includes a first motor 141, a gear 142 and a toothed disc 143. The first motor 141 is arranged inside the sucker rod 11, and the toothed disc 143 is fixedly arranged at the top of the oil inlet chamber 121. The output shaft of the first motor 141 penetrates into the oil inlet chamber 121 and is meshed and connected with the toothed disc 143 through the gear 142.

[0052] With such a technical solution, since the sucker rod 11 and the plunger 12 are connected in rotation, when the plunger 12 and the oil pipe 21 are stuck, the first motor 141 provides rotational power, and the rotational power output by the first motor 141 is transmitted to the plunger 12 through the gear 142 and the toothed disc 143, so that the plunger 12 rotates relative to the oil pipe 21. This rotational motion can effectively break the sand deposition between the plunger 12 and the oil pipe 21 and reduce the friction caused by the accumulation of sand. By combining the up and down pulling of the wire rope 34, the sand between the plunger 12 and the oil pipe 21 can be more effectively removed, thereby greatly improving the efficiency of unblocking.

[0053] In the operation of the conventional oil pump 2, when the sand between the plunger 12 and the oil pipe 21 gradually accumulates, the friction will gradually increase, and eventually cause the pump to get stuck. However, the first motor 141 of the present invention drives the plunger 12 to rotate. Compared with the simple up and down pulling action, the rotation can change the friction angle of the contact surface between the plunger 12 and the oil pipe 21, thereby more effectively avoiding the continuous accumulation of sand, and breaking the deposited sand, reducing the friction between the plunger 12 and the oil pipe 21. This not only helps to relieve the pump from getting stuck, but also effectively reduces the equipment damage caused by excessive friction, thereby extending the service life of the equipment.

[0054] Since the first motor 141 is arranged in the sucker rod 11, when the first motor 141 drives the plunger 12 to rotate relative to the oil pipe 21, the rotational reaction force of the first motor 141 will drive the sucker rod 11 to rotate. Once the sucker rod 11 starts to rotate, it will trigger the rotation of the wire rope 34. On the one hand, the plunger 12 cannot effectively rotate relative to the oil pipe 21 and the unjamming operation cannot be achieved. On the other hand, the rotation of the wire rope 34 will cause damage to the wire rope 34.

[0055] To this end, the present invention also solves the above-mentioned problem through a first anchoring mechanism 15. Specifically, the first anchoring mechanism 15 includes a second motor 151, a first screw 152, a first connecting seat 153 and a connecting rod assembly 154. The second motor 151 is arranged inside the sucker rod 11, and the first screw is rotatably arranged inside the sucker rod 11, and the output shaft of the second motor 151 is fixedly connected to the first screw, the first connecting seat 153 is threadedly connected to the first screw 152, and a plurality of connecting rod assemblies 154 are evenly arranged around the central axis of the sucker rod 11, one end of the connecting rod assembly 154 is hinged to the outer wall of the sucker rod 11, and the other end is movable into the interior of the sucker rod 11 and is hinged to the first connecting seat 153, and the connecting rod assembly 154 can be unfolded relative to the sucker rod 11 to anchor the inner wall of the oil pipe 21.

[0056] By adopting the above technical solution, the second motor 151 drives the first screw to rotate, thereby driving the first connection seat 153 threadedly connected thereto to move in the direction of the screw, and the connecting rod assembly 154 is hinged to the outer wall of the sucker rod 11 and the first connection seat 153 through the movable end, and can be unfolded when needed to contact and anchor the inner wall of the oil pipe 21. This structural setting ensures that the sucker rod 11 can be firmly fixed in the oil pipe 21 when the plunger 12 rotates, avoiding the sucker rod 11 from rotating when the plunger 12 rotates, thereby avoiding unnecessary rotation of the wire rope 34, and ensuring smooth operation of releasing the stuck pump.

[0057] The oil pumping plunger assembly disclosed in the present invention provides rotational power through the first motor 141, and transmits power to the plunger 12 through the gear 142 and the toothed disc 143, so as to realize the rotation of the plunger 12 relative to the oil pipe 21. When the plunger 12 and the oil pipe 21 are stuck, the rotation of the plunger 12 can effectively break the sand deposition between the plunger 12 and the oil pipe 21, reduce the friction caused by the accumulation of sand, and effectively release the pump jam phenomenon. In addition, the second motor 151 drives the first screw to rotate, drives the first connecting seat 153 to move along the screw direction, and the connecting rod assembly 154 can be unfolded and contacted with the inner wall of the oil pipe 21 to achieve anchoring, thereby ensuring that the pumping rod 11 is firmly fixed in the oil pipe 21 during the rotation of the plunger 12, avoiding the pumping rod 11 from rotating when the plunger 12 rotates, and thus preventing the unnecessary rotation of the wire rope 34. This structural design effectively ensures the smooth progress of the pump jam release operation and improves the stability and efficiency of the oil pump.

[0058] The present invention shows a preferred structural mode of the connecting rod assembly 154. Specifically, the connecting rod assembly 154 includes a first connecting rod 1541 and a second connecting rod 1542. The sucker rod 11 has an installation cavity 111 inside. The first screw rod 152 and the first connecting seat 153 are arranged in the installation cavity 111. The side wall of the sucker rod 11 is provided with a mounting hole 112 connected to the mounting cavity 111. The lower end of the first connecting rod 1541 is hinged to the upper end of the second connecting rod 1542, the lower end of the second connecting rod 1542 is hinged to the outer wall of the sucker rod 11, and the upper end of the first connecting rod 1541 passes through the mounting hole 112 and is hinged to the first connecting seat 153.

[0059] The setting of the mounting hole 112 provides space and a path for the articulation and movement of the connecting rod assembly 154, so that the connecting rod can be correctly connected to the first connecting seat 153 and anchored to the inner wall of the oil pipe 21 when necessary.

[0060] By being hinged with the first connection seat 153, the first connecting rod 1541 can drive the second connecting rod 1542 to unfold when the first screw rod 152 rotates, thereby realizing the contact between the connecting rod and the inner wall of the oil pipe 21 and completing the anchoring. Specifically, when the first connection seat 153 moves downward along the first screw rod 152, the angle between the first connecting rod 1541 and the second connecting rod 1542 decreases. At this time, the first connecting rod 1541 swings downward relative to the sucker rod 11, so that the hinge point of the first connecting rod 1541 and the second connecting rod 1542 moves toward the inner wall of the oil pipe 21, so that after the first connecting rod 1541 and the second connecting rod 1542 are unfolded, the hinge point of the first connecting rod 1541 and the second connecting rod 1542 abuts against the inner wall of the oil pipe 21, completing the anchoring of the sucker rod 11 and the inner wall of the oil pipe 21.

[0061] When there is no need to anchor the sucker rod 11 and the inner wall of the oil pipe 21, the first screw rod 152 can be rotated in the opposite direction to move the first connecting seat 153 upward relative to the first screw rod 152. Driven by the first connecting seat 153, the angle between the first connecting rod 1541 and the second connecting rod 1542 increases. At the same time, the hinge point between the first connecting rod 1541 and the second connecting rod 1542 is disconnected from the oil pipe 21, thereby releasing the anchoring between the sucker rod 11 and the oil pipe 21.

[0062] In the above embodiment, the hinge point of the first connecting rod 1541 and the second connecting rod 1542 is against the inner wall of the oil pipe 21 to establish the anchoring operation of the sucker rod 11 and the inner wall of the oil pipe 21. Since the connection between the first connecting rod 1541 and the second connecting rod 1542 is a sharp-angle structure, the contact area between the structure and the inner wall of the oil pipe 21 is small, the anchoring force is insufficient, and there is a slip phenomenon, which will cause the plunger 12 to cause the sucker rod 11 to rotate when rotating. In addition, the above-mentioned sharp-angle structure is anchored to the inner wall of the oil pipe 21. When slipping occurs, the sharp-angle structure will produce scratches on the inner wall of the oil pipe 21, which will cause sand particles to be deposited in the scratches during the subsequent oil pumping process, aggravating the friction between the sand particles and the plunger 12, which will also cause the pump to frequently get stuck during the subsequent oil pumping process.

[0063] To this end, the present invention also discloses the following solution.

[0064] Specifically, the connecting rod assembly 154 also includes a supporting member 1543 , both ends of which are hinged to the upper end of the second connecting rod 1542 and the lower end of the first connecting rod 1541 , respectively. The side of the supporting member 1543 away from the sucker rod 11 has an arc-shaped supporting portion 1544 .

[0065] By adopting the above technical solution, the arc-shaped abutment portion 1544 can better contact the inner wall of the oil pipe 21, increase the friction and contact area, and further enhance the anchoring effect of the connecting rod assembly 154. The arc-shaped design can adapt to the inner wall curve of the oil pipe 21, provide a more uniform support force, so that the sucker rod 11 will not slip or dislocate during the rotation of the plunger 12 or other operations, ensuring the smooth release of the stuck pump. In addition, the arc-shaped abutment portion 1544 structure can form a relatively gentle contact surface when in contact with the oil pipe 21, reduce direct impact or sharp friction, reduce mechanical wear, and extend the service life of the connecting rod assembly 154 and other key components.

[0066] Since the plunger 12 and the oil pipe 21 need to slide up and down, and in order to achieve a seal between the plunger 12 and the oil pipe 21, the outer surface of the plunger 12 is usually made of plastic material. The plastic material has a certain elasticity, which makes it easier for sand particles to enter between the plunger 12 and the oil pipe 21 during the oil pumping process. When a large amount of sand particles accumulate, it is more likely to cause the plunger 12 and the oil pipe 21 to become stuck.

[0067] In order to solve the above problems, the solution adopted by the present invention is: the present invention opens a spiral groove 123 on the outer peripheral surface of the plunger 12, and the lower end opening of the spiral groove 123 extends to the bottom surface of the plunger 12, thereby, the oil in the oil pipe 21 can enter from the lower end of the spiral groove 123, and the top surface of the plunger 12 has an oil outlet hole 124 connected to the upper end opening of the spiral groove 123, and a one-way valve 125 is opened at the oil outlet hole 124.

[0068] By adopting the above technical solution, when the plunger 12 performs a downward stroke, most of the oil in the oil pipe 21 will enter the oil inlet chamber 121 of the plunger 12 through the floating valve 122, and then flow from the oil inlet chamber 121 to the upper end of the plunger 12. In addition, a small part of the oil will enter the spiral groove 123, and flow upward along the spiral groove 123 through the oil outlet hole 124 to the upper end of the plunger 12. In this process, sand particles in the oil will flow along the spiral groove 123 to the upper end of the plunger 12, and the spiral groove 123 will guide the flow of oil and the discharge of sand particles, thereby avoiding the accumulation of sand particles between the contact surface of the plunger 12 and the oil pipe 21, and reducing the occurrence of jamming between the plunger 12 and the oil pipe 21 due to sand particles.

[0069] In the above embodiment, when the plunger 12 performs a downward stroke, the one-way valve 125 opens, and the oil flows through the spiral groove 123 and the oil outlet hole 124 to the upper end of the plunger 12. When the plunger 12 performs an upward stroke, the one-way valve 125 closes, and the oil is confined to the upper end of the plunger 12, thereby facilitating the extraction of the oil. During the oil extraction process, the sand particles in the oil are extracted together, and subsequent oil separation work can be performed.

[0070] Embodiment 2

[0071] The present invention also discloses a pump 2, Figure 5-9 As shown, it includes an oil pipe 21, a pump barrel 22 and an oil pumping plunger assembly of an embodiment, wherein the pump barrel 22 is fixedly arranged at the lower end of the oil pipe 21, a fixed valve 23 is arranged at the bottom of the pump barrel 22, the oil pumping plunger assembly is arranged in the oil pipe 21, the plunger 12 is slidably connected to the inner wall of the oil pipe 21, and a sand prevention structure 24 is also arranged between the pump barrel 22 and the oil pipe 21.

[0072] By adopting the above technical solution, when the oil pump is in use, the pump barrel 22 is installed on the lower end of the oil pipe 21, and then the oil pipe 21 is lowered into the wellbore of the oil well, the upper end of the oil pipe 21 is fixed to the wellhead, and the steel wire rope 34 of the oil production vehicle 3 is connected to the sucker rod 11 of the sucker plunger assembly, and the sucker plunger assembly can be operated in the sucker pipe. When the upstroke operation is performed, the oil will be sucked. At this time, the floating valve 122 on the plunger 12 is closed, and the fixed valve 23 on the pump barrel 22 is opened, and the oil enters the plunger 12 from the wellbore. In the oil pipe 21 between the pump barrel 22 and the pump barrel 22, when the downstroke operation is performed, the wire rope 34 is lowered, and the entire pumping plunger assembly approaches the pump barrel 22 along the oil pipe 21 under the action of gravity. At this time, the fixed valve 23 of the pump barrel 22 is closed, and the floating valve 122 of the plunger 12 is opened, so that the oil at the upper end of the pump barrel 22 can flow into the upper end of the plunger 12. When pumping oil, the pumping plunger assembly is pulled up by the wire rope 34, so that the oil at the upper end of the plunger 12 can be lifted to the top of the oil pipe 21 and transported to the oil storage container through the oil collecting pipe 21.

[0073] By providing a sand-proof structure 24 between the pump barrel 22 and the oil pipe 21 , it is possible to reduce the chance of sand particles entering the oil pipe 21 through the pump barrel 22 , thereby reducing the chance of the plunger 12 and the oil pipe 21 being stuck due to sand particles.

[0074] The present invention shows a preferred structural mode of the sand-proof structure 24. Specifically, the sand-proof structure 24 includes a cylinder 241 and a sand-proof plate 242. The bottom end of the cylinder 241 is closed, and the upper end of the cylinder 241 is fixedly connected to the bottom end of the pump barrel 22. A plurality of sand-proof plates 242 are provided, which are evenly spaced along the axial direction of the cylinder 241 and arranged between the cylinder 241 and the oil pipe 21. The sand-proof plate 242 is an inclined annular structure. The lower end of the sand-proof plate 242 is fixedly connected to the cylinder 241, and an oil inlet gap 240 is provided between the upper end of the sand-proof plate 242 and the oil pipe 21. A plurality of oil inlets 2410 are provided at the connection between the cylinder 241 and the sand-proof plate 242, and a filter screen 2411 is provided on the oil inlet 2410.

[0075] By adopting the above technical solution, the sand-proof plate 242 is designed to be an inclined annular structure, and the oil is guided in a certain direction during the flow process. In this process, heavier sand particles have a greater chance of settling to the bottom along the inclined surface, thereby reducing the situation where sand particles pass through the oil inlet gap 240 along with the oil flow, thereby reducing the situation where sand particles enter the interior of the cylinder 241 through the oil inlet 2410.

[0076] The sand control plates 242 are annular, and their shape helps to form a multi-layered flow path and layered filtration. When the oil flows through these annular structures, it is not only affected by the inclination, but also divided by the multiple layers of the annular plates, resulting in a stronger filtering effect. The annular structure helps to slow down the flow rate of the oil, allowing the sand particles enough time to settle and separate.

[0077] Through the setting of the oil inlet 2410, the oil enters the cylinder 241 through the oil inlet 2410 after filtering and sedimentation, and then enters the upper end of the pump cylinder 22 through continuous suction. The oil inlet 2410 is equipped with a filter 2411, which can effectively filter solid particles such as sand in the oil, thereby greatly reducing the sand content of the oil in the oil pipe 21.

[0078] The sand-proof plate 242 is configured as an inclined annular structure, mainly through the synergistic effect of gravity, centrifugal force and the annular structure, to enhance the sedimentation effect of sand particles and prevent them from entering the oil pipe 21 along with the oil. The inclined design allows the sand particles to settle to the lower end of the sand-proof plate 242, while the filter screen 2411 and the oil inlet 2410 further help filter and clean the oil, thereby effectively reducing the risk of sand particles entering the oil pipe 21, thereby reducing the phenomenon of the plunger 12 being stuck due to sand particles.

[0079] As some preferred embodiments, a plurality of exhaust holes 211 are provided on the side walls of the oil pipe 21 corresponding to the pump barrel 22 and the adjacent sand control plates.

[0080] When pumping oil, the plunger 12 moves upward to generate negative pressure, causing the fixed valve 23 to open. Under the action of negative pressure, the oil flows along the sand-proof plate 242 and flows upward through the oil inlet gap 240. After the oil-gas mixture passes through the oil inlet gap 240, the oil and gas are gradually separated, and the gas in the oil floats upward and is discharged from the exhaust hole 211. The oil enters the cylinder 241 through the oil inlet 2410. Since the position of the oil inlet 2410 is lower than the upper end of the sand-proof plate 242, the gas will not enter the cylinder 241, and will not enter the oil pipe 21, thereby realizing oil and gas separation and exhaust, preventing the gas from entering the oil pump 2 and causing the oil pump 2 to be gas locked.

[0081] Due to the large depth of the oil layer downhole, the oil pipe 21 is relatively long after being implanted into the wellbore by splicing. Usually, only the upper end of the oil pipe 21 and the wellhead are fixed by the wellhead fixing device, and the lower end of the oil pipe 21 is in a free state at the bottom of the wellbore. Since the pump barrel 22 is at the bottom of the oil pipe 21, when the plunger 12 is in stroke, the lower end of the oil pipe 21 may sway slightly due to the stroke of the pump body. The swaying may not only cause the oil pipe 21 and the plunger 12 to get stuck, but also aggravate the eccentric wear of the oil pipe 21 and the wire rope 34, affecting the normal use of the oil pipe 21 and the efficiency of the oil pump 2.

[0082] In order to solve the above problem, the solution adopted by the present invention is to fix a second anchoring mechanism 25 on the side wall of the lower end of the oil pipe 21, and the second anchoring mechanism 25 includes a mounting sleeve 251, a fixing seat 252, a driving assembly 253, a second connecting seat 254 and a plurality of rib assemblies 255.

[0083] Specifically, the mounting sleeve 251 is fixedly arranged on the outer side wall of the lower end of the oil pipe 21, and the mounting sleeve 251 includes a fixed section 2511 and a sliding section 2512 connected to each other, the fixed section 2511 is located above the sliding section 2512, and the diameter of the sliding section 2512 is smaller than the diameter of the fixed section 2511. The fixed section 2511 is used to install the driving assembly 253, and the sliding section 2512 is used to install the fixed seat 252, the second connecting seat 254 and a plurality of rib assemblies 255.

[0084] The fixed seat 252 is fixedly installed on the outer peripheral wall of one end of the sliding section 2512 away from the fixed section 2511, and the second connecting seat 254 is sleeved on the outer peripheral side of the sliding section 2512; multiple umbrella rib components 255 are evenly distributed on the outer peripheral side of the sliding section 2512, one end of the umbrella rib component 255 is hinged to the second connecting seat 254, and the other end is hinged to the fixed seat 252; there are a plurality of driving components 253 evenly distributed in the fixed section 2511, and the driving component 253 is used to drive the second connecting seat 254 to slide along the axial direction of the sliding section 2512, so as to drive the umbrella rib component 255 to expand outward relative to the sliding section 2512 to anchor the well wall.

[0085] The second connection seat 254 is sleeved on the outer peripheral side of the sliding section 2512, and is connected to the sliding section 2512, and is responsible for transmitting torque and supporting the work of the umbrella rib assembly 255. When the driving assembly 253 drives the second connection seat 254 to move, it will guide the expansion of the umbrella rib assembly 255, thereby realizing anchoring to the well wall. Multiple umbrella rib assemblies 255 form an umbrella-like structure to provide support and anchoring to the well wall. The design of the umbrella rib assembly 255 enables the structure to effectively increase the contact area with the well wall when it is expanded, enhance stability, thereby avoiding free swinging or deviation of the oil pipe 21, reducing the risk of the plunger 12 getting stuck, ensuring the smooth operation of the oil pump 2, reducing friction contact with equipment such as the wire rope 34, and extending the life of the equipment.

[0086] The present invention shows a preferred structural mode of the driving assembly 253. Specifically, the driving assembly 253 includes a third motor 2531, a second screw rod 2532, a nut seat 2533 and a driving rod 2534. The fixed section 2511 is provided with an accommodating chamber 2511a to provide a placement and working space for the driving assembly 253. The design of the accommodating chamber 2511a ensures that the structure of the driving assembly 253 is compact and not easily disturbed by the external environment, and also facilitates the installation and maintenance of the driving assembly 253.

[0087] The third motor 2531 is used as a driving source and is responsible for providing rotational power. Its output shaft is fixedly connected to one end of the second screw rod 2532, and the rotation of the motor is transmitted to the nut seat 2533 through the second screw rod 2532, thereby driving the movement of the driving rod 2534.

[0088] The second screw rod 2532 rotates in the accommodating cavity 2511a along the axial direction of the fixed section 2511. The rotation of the second screw rod 2532 converts the rotational motion into linear motion. The second screw rod 2532 is threadedly connected to the nut seat 2533, and pushes the nut seat 2533 to move axially when rotating.

[0089] The nut seat 2533 is threadedly connected to the second screw rod 2532 and moves axially with the rotation of the screw rod. The nut seat 2533 drives the movement of the drive rod 2534 by connecting with the drive rod 2534.

[0090] One end of the driving rod 2534 is fixedly connected to the nut seat 2533, and the other end movably passes through the outer side of the fixed section 2511 and is fixedly connected to the second connecting seat 254. The movement of the driving rod 2534 drives the second connecting seat 254 to slide axially on the sliding section 2512, thereby driving the rib assembly 255 to unfold and complete the anchoring of the well wall.

[0091] By providing a plurality of driving assemblies 253, a larger driving force can be provided to meet the requirements of effective deployment of the plurality of rib assemblies 255, thereby achieving reliable anchoring of the oil pipe 21 and the inner wall of the wellbore.

[0092] The rib assembly 255 includes a first rib rod 2551, a second rib rod 2552 and an anchor 2553. The first rib rod 2551 and the second rib rod 2552 are hingedly connected to the anchor 2553 respectively. The end of the first rib rod 2551 away from the anchor 2553 is hingedly connected to the second connecting seat 254, and the end of the second rib rod 2552 away from the anchor 2553 is hingedly connected to the fixing seat 252.

[0093] The first rib rod 2551 and the second rib rod 2552 are respectively hingedly connected to the anchor 2553 to form a support frame of the umbrella rib assembly 255. They cooperate with each other through the hinge point when the umbrella rib assembly 255 is unfolded to provide support and stability. The end of the first rib rod 2551 away from the anchor 2553 is hingedly connected to the second connecting seat 254. The movement of the second connecting seat 254 will drive the first rib rod 2551 to unfold, thereby further driving the expansion of the umbrella rib assembly 255. The end of the second rib rod 2552 away from the anchor 2553 is hingedly connected to the fixed seat 252. The stability of the fixed seat 252 provides support for the second rib rod 2552, so that the umbrella rib assembly 255 can form a stable support structure when unfolded. The anchor 2553 serves as the connection point of the umbrella rib assembly 255, plays the role of connecting and fixing the rib rods, and ensures that the umbrella rib assembly 255 can be firmly anchored to the well wall after unfolding.

[0094] By integrating the second anchoring mechanism 25 at the lower end of the oil pipe 21, the entire second anchoring mechanism 25 has a compact structure, which can effectively improve the compactness, reliability, installation convenience and operating efficiency of the oil pump 2. This design not only reduces the number of components, but also improves the stability and durability of the equipment, reduces the failure rate, and optimizes the control accuracy and stability during the operation. For operations in deep wells or special environments, the integrated anchoring mechanism has its unique advantages and can improve the overall performance and work efficiency of the equipment.

[0095] It should be noted that, in the above-mentioned second anchoring mechanism 25, the method of providing electric energy to the third motor 2531 can be to directly connect the third motor 2531 with one end of the cable and connect the other end to the ground power supply equipment.

[0096] Of course, as some other implementation methods, a battery and a wireless control module can be installed inside the fixed section 2511, and the battery can be used to power the third motor 2531, and the wireless control module can receive ground signals to control the operation of the third motor 2531.

[0097] Embodiment 3

[0098] The present invention also discloses an oil production vehicle 3, Figure 10-11 As shown, it includes a chassis 31, a winch 32 and a derrick 33 arranged on the chassis 31, a steel wire rope 34 is wound around the end of the derrick 33, one end of the steel wire rope 34 is connected to the winch 32, and the other end is used for detachable fixed connection with the sucker rod 11 in the oil pump 2 described in the second embodiment.

[0099] When producing oil, the oil pump is installed in advance. When in use, the pump barrel 22 is installed on the lower end of the oil pipe 21, and then the oil pipe 21 is lowered into the wellbore of the oil well. The upper end of the oil pipe 21 and the wellhead are fixed, and at the same time, the lower end of the oil pipe 21 and the inner wall of the wellbore are anchored by the second anchoring mechanism 25. The hydraulic system on the oil production vehicle 3 drives the derrick 33 to stand upright on the bottom surface, and then the wire rope 34 is connected to the sucker rod 11 of the pumping plunger assembly. Under the action of the winch 32, the wire rope 34 is driven to move up and down, so that the pumping plunger assembly performs up and down stroke operations in the oil pipe 21 to achieve oil pumping operations.

[0100] When the plunger 12 and the oil pipe 21 are stuck, the first anchoring mechanism 15 is used to anchor the sucker rod 11 and the oil pipe 21, and the rotating mechanism 14 is used to rotate the plunger 12 relative to the oil pipe 21. This rotational motion can effectively break the sand deposits between the plunger 12 and the oil pipe 21 and reduce the friction caused by the sand accumulation. By pulling up and down the wire rope 34, the sand between the plunger 12 and the oil pipe 21 can be more effectively removed, thereby greatly improving the efficiency of unblocking.

[0101] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pumping plunger assembly, comprising a pumping rod (11) and a plunger (12), wherein a counterweight (13) is provided at the bottom of the plunger (12), characterized in that: The upper end of the sucker rod (11) is used to be detachably connected to the steel wire rope (34) of the oil production vehicle (3), and the lower end of the sucker rod (11) is rotatably connected to the plunger (12), and also includes a rotating mechanism (14) and a first anchoring mechanism (15); The rotating mechanism (14) comprises a first motor (141), a gear (142) and a toothed disc (143); an oil inlet chamber (121) is provided inside the plunger (12); a floating valve (122) is provided at the bottom of the oil inlet chamber (121); the first motor (141) is arranged inside the sucker rod (11); the toothed disc (143) is fixedly arranged at the top of the oil inlet chamber (121); the output shaft of the first motor (141) penetrates into the oil inlet chamber (121) and is meshedly connected with the toothed disc (143) through the gear (142); The first anchoring mechanism (15) comprises a second motor (151), a first screw (152), a first connecting seat (153) and a connecting rod assembly (154); the second motor (151) is arranged inside the sucker rod (11); the first screw is rotatably arranged inside the sucker rod (11); the output shaft of the second motor (151) is fixedly connected to the first screw; the first connecting seat (153) is threadedly connected to the first screw (152); a plurality of connecting rod assemblies (154) are evenly arranged around the central axis of the sucker rod (11); one end of the connecting rod assembly (154) is hinged to the outer wall of the sucker rod (11); the other end is movable into the inside of the sucker rod (11) and is hinged to the first connecting seat (153); the connecting rod assembly (154) can be unfolded relative to the sucker rod (11) to anchor the inner wall of the oil pipe (21).

2. The oil pump plunger assembly according to claim 1, characterized in that: The connecting rod assembly (154) includes a first connecting rod (1541) and a second connecting rod (1542). The sucker rod (11) has an installation cavity (111) inside. The first screw rod (152) and the first connecting seat (153) are arranged in the installation cavity (111). The side wall of the sucker rod (11) is provided with a mounting hole (112) connected to the mounting cavity (111). The lower end of the first connecting rod (1541) is hingedly connected to the upper end of the second connecting rod (1542), the lower end of the second connecting rod (1542) is hingedly connected to the outer wall of the sucker rod (11), and the upper end of the first connecting rod (1541) passes through the mounting hole (112) and is hingedly connected to the first connecting seat (153).

3. The oil pump plunger assembly according to claim 2, characterized in that: The connecting rod assembly (154) further comprises a supporting member (1543), the two ends of which are hingedly connected to the upper end of the second connecting rod (1542) and the lower end of the first connecting rod (1541), respectively. The supporting member (1543) has an arc-shaped supporting portion (1544) on the side away from the sucker rod (11).

4. The oil pump plunger assembly according to claim 1, characterized in that: The outer circumferential surface of the plunger (12) is provided with a spiral groove (123), the lower end opening of the spiral groove (123) extends to the bottom surface of the plunger (12), the top surface of the plunger (12) is provided with an oil outlet hole (124) connected to the upper end opening of the spiral groove (123), and a one-way valve (125) is provided at the oil outlet hole (124).

5. A pump comprising the pump plunger assembly according to any one of claims 1 to 4, characterized in that: It also includes an oil pipe (21) and a pump barrel (22), wherein the pump barrel (22) is fixedly arranged at the lower end of the oil pipe (21), a fixed valve (23) is arranged at the bottom of the pump barrel (22), the oil pumping plunger assembly is arranged in the oil pipe (21), the plunger (12) is slidably connected to the inner wall of the oil pipe (21), and a sand prevention structure (24) is also arranged between the pump barrel (22) and the oil pipe (21).

6. The oil well pump according to claim 5, characterized in that: The sand-proof structure (24) comprises a cylinder (241) and a sand-proof plate (242). The bottom end of the cylinder (241) is closed, the upper end of the cylinder (241) is fixedly connected to the bottom end of the pump cylinder (22), a plurality of sand-proof plates (242) are provided, and the sand-proof plates (242) are arranged between the cylinder (241) and the oil pipe (21) at equal intervals along the axial direction of the cylinder (241), the sand-proof plates (242) are inclined ring structures, the lower end of the sand-proof plates (242) is fixedly connected to the cylinder (241), an oil inlet gap (240) is provided between the upper end of the sand-proof plates (242) and the oil pipe (21), and a plurality of oil inlets (2410) are provided at the connection between the cylinder (241) and the sand-proof plates (242), and a filter screen (2411) is provided on the oil inlet (2410).

7. The oil well pump according to claim 6, characterized in that: A plurality of exhaust holes (211) are provided on the side wall of the oil pipe (21) corresponding to the pump barrel (22) and the adjacent sand control plate.

8. The oil well pump according to claim 5, characterized in that: A second anchoring mechanism (25) is fixedly arranged on the side wall of the lower end of the oil pipe (21), and the second anchoring mechanism (25) comprises a mounting sleeve (251), a fixing seat (252), a driving assembly (253), a second connecting seat (254) and a plurality of rib assemblies (255); The mounting sleeve (251) is fixedly arranged on the outer side wall of the lower end of the oil pipe (21), and the mounting sleeve (251) comprises a fixed section (2511) and a sliding section (2512) connected to each other, the fixed section (2511) is located above the sliding section (2512), and the diameter of the sliding section (2512) is smaller than the diameter of the fixed section (2511); The fixing seat (252) is fixedly mounted on the outer peripheral wall of one end of the sliding section (2512) away from the fixing section (2511), and the second connecting seat (254) is sleeved on the outer peripheral side of the sliding section (2512); A plurality of rib assemblies (255) are evenly disposed on the outer peripheral side of the sliding section (2512); one end of the rib assembly (255) is hingedly connected to the second connecting seat (254), and the other end is hingedly connected to the fixing seat (252); A plurality of driving components (253) are evenly distributed in the fixed section (2511), and the driving components (253) are used to drive the second connecting seat (254) to slide along the axial direction of the sliding section (2512), so as to drive the rib component (255) to expand outward relative to the sliding section (2512) to anchor to the well wall.

9. The oil well pump according to claim 8, characterized in that: The fixed section (2511) is provided with a receiving chamber (2511a), and the driving assembly (253) comprises a third motor (2531) provided in the receiving chamber (2511a), a second screw rod (2532), a nut seat (2533) and a driving rod (2534); the second screw rod (2532) is arranged in the receiving chamber (2511a) so as to rotate along the axial direction of the fixed section (2511), and the output shaft of the third motor (2531) is fixedly connected to one end of the second screw rod (2532); the nut seat (2533) is threadedly connected to the second screw rod, one end of the driving rod (2534) is fixedly connected to the nut seat (2533), and the other end movably passes through the outside of the fixed section (2511) and is fixedly connected to the second connecting seat (254); The rib assembly (255) comprises a first rib rod (2551), a second rib rod (2552) and an anchor (2553); the first rib rod (2551) and the second rib rod (2552) are respectively hingedly connected to the anchor (2553); one end of the first rib rod (2551) away from the anchor (2553) is hingedly connected to the second connecting seat (254); and one end of the second rib rod (2552) away from the anchor (2553) is hingedly connected to the fixing seat (252).

10. An oil production vehicle, characterized in that: It comprises a chassis (31), a winch (32) and a derrick (33) arranged on the chassis (31), a steel wire rope (34) is wound around the end of the derrick (33), one end of the steel wire rope (34) is connected to the winch (32), and the other end is used for detachable fixed connection with the sucker rod (11) in the oil pump (2) according to any one of claims 5 to 9.

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