Controllable solid valve low-fault tubular oil pump and method

Abstract

The present invention discloses a controllable fixed valve low fault tubular oil pump and method, including an oil pump assembly, the oil pump assembly includes a pump barrel assembly and a plunger assembly installed inside the pump barrel assembly, the lower end of the oil pump assembly is connected to a fixed valve assembly, the fixed valve assembly includes a fixed valve housing, a fixed valve steel ball control assembly, a fixed valve steel ball, a fixed valve seat, and a valve cover, the fixed valve steel ball control assembly, the fixed valve steel ball, the fixed valve seat, and the valve cover are all arranged inside the fixed valve housing, the fixed valve steel ball is seated on the fixed valve seat, the upper end of the fixed valve seat extends into the interior of the valve cover, the upper end of the valve cover is connected to the fixed valve steel ball control assembly, and the upper end of the fixed valve steel ball control assembly is connected to the plunger assembly. The present invention delays pipe rod eccentric wear, prevents plunger jamming and other faults, and can effectively clear faults such as machine impurities, scaling, sanding, and falling objects in the pump, and no oil drainer needs to be specially installed underground.

Description

Technical Field

[0001] The invention relates to the technical field of oil field oil well pumping unit oil production downhole oil pumping pump, in particular to a controllable solid valve low fault tubular oil pumping pump and method. Background Art

[0002] At present, tubular oil pumps are widely used in oil wells in oil fields for oil production, which are generally composed of fixed valves, long pump barrels, short plungers, and floating valve pairs. Due to the complex working environment of the oil well pump downhole, gas influence, mechanical impurity deposition, scaling, sand production, etc., it is very easy to have plunger jamming, fixed valve pair leakage, floating valve cover breakage, gas lock, aggravated pipe rod eccentric wear and other faults, resulting in shortened oil well pump inspection cycle, increased pump inspection and maintenance workload, increased production management difficulty and production costs.

[0003] Application No.: 201820075719.5 relates to an anti-gas lock oil pump, a gas-liquid separator and an oil production device. The anti-gas lock oil pump includes a pump barrel, an oil pump plunger and a fixed valve located in the pump barrel, the lower end of the fixed valve is connected to a gas-liquid separator, the gas-liquid separator includes a liquid inlet barrel connected to the valve hole of the fixed valve through an upper opening, at least one guide plate with an upper opening is provided on the outer periphery of the liquid inlet barrel, the guide plate and the outer barrel wall of the liquid inlet barrel form a receiving cavity, a liquid inlet hole is provided on the barrel wall of the liquid inlet barrel in the receiving cavity, the oil bypasses the guide plate from the outside of the liquid inlet barrel into the receiving cavity and enters the liquid inlet barrel through the liquid inlet hole, and the associated gas in the oil floats up during the oil bypassing process. The oil and gas can be effectively separated. The oil in the accommodating cavity of the guide plate can seal the liquid inlet hole to prevent the gas from flowing into the inner cavity of the liquid inlet barrel through the liquid inlet hole. The gas in the oil can be discharged in advance through a simple structure to prevent the gas from entering the pump with the oil, which will cause the pump to be gas locked and unable to pump oil.

[0004] Application No.: 201420116370.7 An anti-gas lock oil pump, an anti-gas valve and an anti-gas valve seat are installed in a valve cover, the lower part of the valve cover is connected to the upper part of a sealing device, a valve stem passes through the sealing device, the anti-gas valve seat, and the anti-gas valve, the lower part of the valve stem is connected to the upper part of an upper scraper sleeve, an upper valve seat is installed at the lower part of an upper plunger, an upper connecting rod passes through the upper valve seat, the rear upper part of the upper plunger and is connected to the lower part of the upper scraper sleeve, an upper mechanical valve is installed at the lower part of the upper connecting rod, and the tail of the upper connecting rod is connected to the The upper part of the lower scraper sleeve is connected, the lower valve seat is installed at the lower part of the lower plunger, the lower connecting rod passes through the lower valve seat, the upper rear part of the lower plunger is connected to the lower part of the lower scraper sleeve, the lower part of the lower connecting rod is installed with the lower mechanical valve, the sealing cylinder, the pump barrel and the oil inlet valve are connected in sequence, after the sealing device is pressed into the sealing cylinder, the upper scraper sleeve, the upper plunger, the lower scraper sleeve and the lower plunger are in the pump barrel, the upper plunger and the lower plunger cooperate with the pump barrel to seal, the mechanical valve can automatically leave the valve seat, the oil and gas can be discharged, and the oil pump will not be air locked.

[0005] Application No. 201020154878.8 provides an anti-jamming oil pump, which belongs to an oil field production device, and has a pump barrel, a plunger in the pump barrel, a hollow tie rod fixed to the upper end of the plunger, the lower end of the floating island valve body is fixed to the upper end of the hollow tie rod, the upper end has an upper joint, a valve ball is installed on the valve seat in the middle, the lower end of the pump barrel is installed with a sedimentation tube upper joint through the lower joint of the pump barrel, a sedimentation tube outer barrel is installed below the sedimentation tube upper joint, a sedimentation tube lower joint is installed at the lower end of the sedimentation tube outer barrel, a fixed island valve body is installed at the upper end of the sedimentation tube inner barrel, another through hole is provided on the fixed island valve body, and another valve ball is installed on another valve seat in the fixed island valve body. This oil pump has good use effect, improves the discharge capacity, improves the strength, and reduces the occurrence of fracture accidents; it can prevent valve failure caused by the deposition of solid matter on the valve seat.

[0006] Application number: 201420601824.X A fall-proof protector for a pump, comprising an upper joint, an outer sleeve, a shuttle valve, an inner tube, a storage cavity, a flushing screw, a lower joint, an inner tube of a shuttle valve, a clamping groove, and an oil rod; the inner tube is arranged on the lower joint; the lower part of the outer sleeve is connected to the lower joint; the upper part of the outer sleeve is connected to the upper joint; the outer sleeve, the lower joint and the inner tube constitute a storage cavity; the shuttle valve is in a two-petal shape, and is mounted on the oil rod by the clamping groove, and the shuttle valve can slide on the oil rod, and the contact surface between the shuttle valve and the oil rod is the inner tube of the shuttle valve. The utility model can effectively prevent wax, scale, sand and other falling objects from falling into the oil pipe, prevent the occurrence of oil pump jamming, and play a protective role in preventing the oil pump from falling objects.

[0007] Application No.: 200810000912.3 relates to a positive well-washing oil pump, which is used in the oil extraction industry as a downhole equipment with sand prevention, gas prevention, wax prevention and high pump efficiency. In the present invention, the upper and lower plungers are provided with sand prevention grooves, and the sand deposited in the sand prevention grooves can be sent to the bottom of the pump to play a sand prevention role. When the plunger falls to the pump collision position, the upper and lower oil pipes of the pump are connected through the pump cavity, realizing the positive well-washing function. In the present invention, the oil inlet valve is easy to open under the action of hydraulic feedback, which increases the filling coefficient, reduces the bending of the sucker rod, increases the effective stroke of the pump, prevents gas lock, and reduces the fatigue loss of the sucker rod, so it has the function and characteristics of gas prevention and high pump efficiency.

[0008] Application No.: 201420064385.3 A wax-blocking oil pump relates to the field of liquid variable displacement machinery. The utility model pump is also provided with a latch plate in the inner cavity of the pump cylinder, the latch plate is located between the downstream movable valve and the fixed valve, and the latch plate is provided with an oil passage that passes through the latch plate up and down, and the lower end of the latch plate is provided with a hollow cavity, the cross-sectional area of ​​which is greater than or equal to the cross-sectional area of ​​the fixed valve ball; in addition, a spring is provided on the valve seat of the fixed valve, and an annular wax scraper is provided between the spring and the latch plate, the outer diameter of the wax scraper is the same as the inner diameter of the valve cavity of the fixed valve, and the inner diameter is the same as the diameter of the cross-sectional area of ​​the hollow cavity at the lower end of the latch plate. By arranging the wax scraper in the inner cavity of the fixed valve of the oil pump, the outer wall of the fixed pipe of the downstream movable valve seat, and the inner wall of the pump cylinder, the purpose of wax removal is achieved while the oil pump is completing the oil pumping operation. The improved process is simple and easy to implement, and effectively reduces the wax jam and pump blockage caused by wax deposition inside the oil pump.

[0009] The technical solutions, technical problems to be solved and beneficial effects produced by the above-disclosed technologies are all different from the present invention. Regarding more technical features, technical problems to be solved and beneficial effects of the present invention, there is no technical inspiration in the above-disclosed technical documents. Summary of the invention

[0010] The object of the present invention is to provide a controllable solid valve low-fault tubular oil pump and method, which can delay pipe-rod eccentric wear, prevent plunger jamming and other faults, and effectively eliminate faults such as machine impurities, scaling, sand production, and objects falling into the pump, and there is no need to install a special oil drain device underground.

[0011] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a controllable fixed valve low-fault tubular oil pump, including an oil pump assembly, the oil pump assembly including a pump barrel assembly and a plunger assembly installed inside the pump barrel assembly, the lower end of the oil pump assembly is connected to a fixed valve assembly, the fixed valve assembly includes a fixed valve housing, a fixed valve steel ball control assembly, a fixed valve steel ball, a fixed valve seat, and a valve cover, the fixed valve steel ball control assembly, the fixed valve steel ball, the fixed valve seat, and the valve cover are all arranged inside the fixed valve housing, the fixed valve steel ball is seated on the fixed valve seat, the upper end of the fixed valve seat extends into the interior of the valve cover, the upper end of the valve cover is connected to the fixed valve steel ball control assembly, and the upper end of the fixed valve steel ball control assembly is connected to the plunger assembly.

[0012] Furthermore, the fixed valve housing includes a fixed valve chamber, a reversing spring frame, and a controller chamber which are sequentially connected from bottom to top; the lower end of the fixed valve chamber is connected to a lower joint, and the upper end of the controller chamber is connected to the pump barrel assembly via a fixed valve upper joint.

[0013] Furthermore, the fixed valve steel ball control assembly includes a torque rod, a buffer mechanism, a guide rod, a track pin, and a control fork. The track pin is fixed on the guide rod, and the track pin runs in a reversing track opened on the inner wall of the reversing spring frame. The lower end of the guide rod is connected to the buffer mechanism, the upper end of the torque rod is connected to the buffer mechanism, the lower end is connected to the valve cover, the upper end of the guide rod is connected to the control fork, and the upper end of the control fork is connected to the plunger assembly.

[0014] Furthermore, the fixed valve steel ball control assembly also includes a spring, which is sleeved on the outside of the guide rod, the upper end of the spring is pressed against a limit platform provided on the inner wall of the control fork, and the lower end of the spring is connected to the reversing spring frame.

[0015] Furthermore, the buffer mechanism includes a return spring seat, a buffer spring compartment cover, a buffer spring, and a buffer spring compartment. The upper end of the buffer spring compartment is connected to the lower end of the guide rod, and the buffer spring is placed inside the buffer spring compartment. The buffer spring is sleeved on the return spring seat, and the lower end of the buffer spring is pressed against a limit platform opened on the outer wall of the return spring seat, and the upper end of the buffer spring is pressed against the top wall of the inner cavity of the buffer spring compartment. The buffer spring compartment cover is connected to the lower port of the buffer spring compartment, and the inner wall of the lower port of the buffer spring compartment cover limits the axial position of the return spring seat. The lower end of the return spring seat is connected to the torque rod.

[0016] Furthermore, the lower end of the fixed valve seat is connected to the conduit through a conduit coupling, and the lower end of the conduit is connected to the lower joint.

[0017] Furthermore, the pump barrel assembly includes an extended short section, a middle coupling, a pump barrel, and a pump barrel upper joint which are sequentially connected from bottom to top.

[0018] Furthermore, the plunger assembly includes a fork valve seat, a floating valve cover, a plunger, and a plunger upper joint which are sequentially connected from bottom to top, and a fork valve steel ball is seated on the fork valve seat.

[0019] In order to achieve the above object, the present invention adopts the following technical solution, and the method for using the controllable solid valve low-fault tubular oil pump comprises the following steps:

[0020] Method for lifting crude oil: according to the production needs of the oil well, the controllable fixed valve low-fault tubular oil pump is connected to the lower end of the production pipe string and lowered into the well; the upper joint of the plunger is connected to the lower part of the sucker rod string with the plunger assembly and lowered into the pump, the upper lifting distance is prevented and driven by the ground pumping unit, the plunger moves upward, the floating valve pair is closed, the fluid in the oil pipe string is discharged from the ground, and the fixed valve pair is opened at the same time, and the fluid in the wellbore enters the pump barrel under the action of the pressure difference; the plunger assembly moves downward with the sucker rod string, the floating valve pair is opened, the fluid in the pump is replaced above the floating valve pair, and the fixed valve pair is closed at the same time, preparing for upward discharge.

[0021] Further, the following steps are included:

[0022] Methods to prevent plunger jamming: Adopting a long plunger assembly and a short pump barrel combined process is beneficial to ensuring the quality of the pump barrel coating and plunger processing. At the same time, during the upward and downward movement of the plunger, impurities in the annular gap of the plunger and pump barrel are automatically carried away to prevent sand and scale from forming wedge-shaped deposits in the annular gap, thereby preventing plunger and pump barrel jamming.

[0023] Further, the following steps are included:

[0024] Methods for preventing fixed valve failure: The lower joint, conduit, fixed valve chamber, conduit coupling, fixed valve seat, steel ball and valve cover together form a space for the deposition of mechanical impurities, which prevents mechanical impurities that fall into the pump barrel from directly entering the fixed valve pair and causing failure of the sealing function.

[0025] Further, the following steps are included:

[0026] Fixed valve fault handling and oil leakage method: When a fixed valve auxiliary seal failure occurs, lower the pumping rod column to connect the lower fork valve seat of the plunger assembly with the control fork, rotate the rod column 180° forward, and the fixed valve steel ball control assembly composed of the torque rod, reset spring seat, buffer spring bin cover, buffer spring, buffer spring bin, guide rod, track pin, reversing spring frame, controller bin, spring, and control fork realizes positioning and reversing, and lift the rod column to make the plunger assembly into the oil pipe above the pump barrel; under the action of the spring force, drive the steel ball, valve cover, torque rod, reset spring seat, buffer spring bin cover, buffer spring, buffer spring bin, guide rod, track pin, reversing spring frame, controller bin, spring, and control fork upward, and the built-in step of the valve cover drives the steel ball to leave the fixed valve seat, so that the tubular oil pump can realize forward well washing, and under the action of hydraulic impact, remove mechanical impurities, scaling and other faults in the sedimentation cavity of the fixed valve, and restore the function of the fixed valve auxiliary. During well repair operations, corresponding operations are performed to achieve oil leakage from the tubing to prevent pollution; reverse operations can close the fixed valve pair and resume oil pump production.

[0027] Further, the following steps are included:

[0028] The method of washing wells and clearing wax scales is as follows: lower the sucker rod column to connect the fork valve seat at the bottom of the plunger assembly with the control fork, rotate the rod column 180 degrees forward, and the fixed valve steel ball control assembly composed of the torque rod, reset spring seat, buffer spring bin cover, buffer spring, buffer spring bin, guide rod, track pin, reversing spring frame, controller bin, spring, and control fork realizes positioning and reversing, and lift the rod column to make the plunger assembly into the oil pipe above the pump barrel; under the action of the spring force, the steel ball, valve cover, torque rod, reset spring seat, buffer spring bin cover, buffer spring, buffer spring bin, guide rod, track pin, reversing spring frame, controller bin, spring, and control fork are driven upward, and the built-in step of the valve cover drives the steel ball to leave the fixed valve seat, so that the steam injection construction of the tubular oil pump oil pipe can be realized; after the steam injection is completed, the fixed valve pair can be closed by reverse operation to resume the production of the oil pump.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] Crude oil lifting: According to the production needs of the oil well, the controllable fixed valve low-fault tubular oil pump is connected to the lower end of the production pipe string and lowered into the well; the upper joint of the plunger is connected to the lower part of the sucker rod string with the plunger assembly and lowered into the pump, the upper lifting distance is prevented and driven by the ground pumping unit, the plunger moves upward, the floating valve pair is closed, the fluid in the oil pipe string is discharged from the ground, and the fixed valve pair is opened at the same time, and the fluid in the wellbore enters the pump barrel under the action of pressure difference; the plunger assembly moves downward with the sucker rod string, the floating valve pair is opened, the fluid in the pump is replaced above the floating valve pair, and the fixed valve pair is closed at the same time, preparing for upward discharge.

[0031] Anti-gas lock: The plunger is made of thick-walled material and adopts a single floating valve sub-structure. By volume occupation, the gas compression space is reduced, and the gas occupation is forced to be reduced, thereby achieving the technical purpose of reducing gas lock failures.

[0032] Prevent plunger jamming: The combination of long plunger assembly and short pump barrel is beneficial to ensure the quality of the pump barrel coating and plunger processing. At the same time, during the upward and downward movement of the plunger, impurities in the annular gap of the plunger and pump barrel are automatically carried away to prevent sand and scale from forming wedge-shaped deposits in the annular gap, thus preventing plunger and pump barrel jamming.

[0033] Fixed valve failure prevention: The lower joint, conduit, fixed valve chamber, conduit coupling, fixed valve seat, steel ball and valve cover together form a mechanical impurity deposition space to prevent mechanical impurities that fall into the pump barrel from directly entering the fixed valve pair and causing the sealing function to fail.

[0034] Fixed valve fault handling and oil drainer: When a fixed valve auxiliary seal failure occurs, lower the pumping rod column to connect the lower fork valve seat of the plunger assembly with the control fork, rotate the rod column 180°, and the fixed valve steel ball control assembly composed of the torque rod, reset spring seat, buffer spring bin cover, buffer spring, buffer spring bin, guide rod, track pin, reversing spring frame, controller bin, spring, and control fork is positioned and reversed, and the rod column is lifted to make the plunger assembly in the oil pipe above the pump barrel. Under the action of the spring force, the steel ball, valve cover, torque rod, reset spring seat, buffer spring bin cover, buffer spring, buffer spring bin, guide rod, track pin, reversing spring frame, controller bin, spring, and control fork are driven upward, and the built-in step of the valve cover drives the steel ball to leave the fixed valve seat, so that the tubular oil pump can be used for forward well washing. Under the action of hydraulic impact, mechanical impurities, scaling and other faults in the sedimentation cavity of the fixed valve are removed to restore the function of the fixed valve auxiliary. During well repair, the corresponding operation is performed to drain the tubing to prevent pollution. The reverse operation can close the fixed valve pair and resume the production of the oil pump.

[0035] Positive well washing and wax removal: lower the pumping rod column, connect the fork valve seat at the bottom of the plunger assembly with the control fork, rotate the rod column 180°, and the fixed valve steel ball control assembly composed of the torque rod, reset spring seat, buffer spring compartment cover, buffer spring, buffer spring compartment, guide rod, track pin, reversing spring frame, controller compartment, spring, and control fork realizes positioning and reversing. Lift the rod column to move the plunger assembly into the oil pipe above the pump barrel. Under the action of the spring force, the steel ball, valve cover, torque rod, reset spring seat, buffer spring compartment cover, buffer spring, buffer spring compartment, guide rod, track pin, reversing spring frame, controller compartment, spring, and control fork are driven upward, and the built-in step of the valve cover drives the steel ball to leave the fixed valve seat, so that the steam injection construction of the tubular oil pump oil pipe can be realized. After the steam injection is completed, the fixed valve pair can be closed by reverse operation to resume the production of the oil pump.

[0036] Under the condition that the normal oil production function of the conventional tubular oil pump is satisfied, the present invention mainly solves the multiple faults such as air lock, floating valve cover breakage, delayed pipe rod eccentric wear, and the like. When a fault occurs due to sand production, scaling, mechanical debris deposition, or falling objects in the pump, the plunger assembly and the steel ball controller assembly can be used to effectively clear the fault, thereby realizing operations such as normal well washing, wax removal, and scale removal, thereby extending the oil well pump inspection cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a structural schematic diagram of a controllable solid valve low-fault tubular oil pump of the present invention;

[0038] Figure 2 It is a partial enlarged view of the present invention.

[0039] In the figure: G1 lower joint, G2 conduit, G3 fixed valve chamber, G4 conduit coupling, G5 fixed valve seat, G6 steel ball, G7 valve cover, G8 torque rod, G9 return spring seat, G10 buffer spring chamber cover, G11 buffer spring, G12 buffer spring chamber, G13 guide rod, G14 track pin, G15 reversing spring frame, G16 controller chamber, G17 spring, G18 control fork, G19 fixed valve upper joint;

[0040] B1 extended nipple, B2 middle coupling, B3 pump barrel, B4 pump barrel upper joint;

[0041] Z1 fork valve seat, Z2 steel ball, Z3 floating valve cover, Z4 plunger, Z5 plunger upper connector. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in 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.

[0043] Embodiment 1:

[0044] See also Figure 1 to Figure 2 , the present invention provides a technical solution:

[0045] A controllable fixed valve low-fault tubular oil pump comprises an oil pump assembly, which comprises a pump barrel assembly B and a plunger assembly Z installed inside the pump barrel assembly, the lower end of the oil pump assembly is connected to a fixed valve assembly G, the fixed valve assembly comprises a fixed valve housing, a fixed valve steel ball control assembly, a fixed valve steel ball G6, a fixed valve seat G5, and a valve cover G7, the fixed valve steel ball control assembly, the fixed valve steel ball, the fixed valve seat, and the valve cover are all arranged inside the fixed valve housing, the fixed valve steel ball is seated on the fixed valve seat, the upper end of the fixed valve seat extends into the interior of the valve cover, the upper end of the valve cover is connected to the fixed valve steel ball control assembly, and the upper end of the fixed valve steel ball control assembly is connected to the plunger assembly.

[0046] The fixed valve housing includes a fixed valve chamber G3, a reversing spring frame G15, and a controller chamber G16 which are sequentially connected from bottom to top. The lower end of the fixed valve chamber is connected to the lower joint G1, and the upper end of the controller chamber is connected to the pump barrel assembly via the fixed valve upper joint G19.

[0047] The fixed valve steel ball control assembly includes a torque rod G8, a buffer mechanism, a guide rod G13, a track pin G14, a spring G17, and a control fork G18. The track pin is fixed on the guide rod, and the track pin runs in a reversing track opened on the inner wall of the reversing spring frame. The lower end of the guide rod is connected to the buffer mechanism, the upper end of the torque rod is connected to the buffer mechanism, the lower end is connected to the valve cover, the upper end of the guide rod is connected to the control fork, and the upper end of the control fork is connected to the plunger assembly. The spring is sleeved on the outside of the guide rod, the upper end of the spring is pressed against the limit platform opened on the inner wall of the control fork, and the lower end of the spring is connected to the reversing spring frame.

[0048] The buffer mechanism includes a return spring seat G9, a buffer spring compartment cover G10, a buffer spring G11, and a buffer spring compartment G12. The upper end of the buffer spring compartment is connected to the lower end of the guide rod. The buffer spring is placed inside the buffer spring compartment. The buffer spring is sleeved on the return spring seat, and the lower end of the buffer spring is pressed against a limit platform opened on the outer wall of the return spring seat. The upper end of the buffer spring is pressed against the top wall of the inner cavity of the buffer spring compartment. The buffer spring compartment cover is connected to the lower port of the buffer spring compartment. The inner wall of the lower port of the buffer spring compartment cover limits the axial position of the return spring seat. The lower end of the return spring seat is connected to the torque rod.

[0049] The lower end of the fixed valve seat is connected to the conduit G2 through a conduit coupling G4, and the lower end of the conduit is connected to the lower joint.

[0050] The pump barrel assembly comprises a long and short section B1, a middle coupling B2, a pump barrel B3, and a pump barrel upper joint B4 which are sequentially connected from bottom to top.

[0051] The plunger assembly comprises a fork valve seat Z1, a floating valve cover Z3, a plunger Z4, and a plunger upper joint Z5 which are sequentially connected from bottom to top, and a fork valve steel ball Z2 is seated on the fork valve seat.

[0052] The fixed valve assembly G is composed of the lower joint G1, the conduit G2, the fixed valve chamber G3, the conduit coupling G4, the fixed valve seat G5, the steel ball G6, the valve cover G7, the torque rod G8, the return spring seat G9, the buffer spring chamber cover G10, the buffer spring G11, the buffer spring chamber G12, the guide rod G13, the track pin G14, the reversing spring frame G15, the controller chamber G16, the spring G17, the control fork G18, and the fixed valve upper joint G19. The fixed valve assembly G is connected to the lower part of the pump barrel assembly B by threads.

[0053] The fixed valve steel ball control assembly consisting of a torque rod G8, a return spring seat G9, a buffer spring compartment cover G10, a buffer spring G11, a buffer spring compartment G12, a guide rod G13, a track pin G14, a reversing spring frame G15, a controller compartment G16, a spring G17, and a control fork G18 is placed in the fixed valve assembly G.

[0054] The pump barrel assembly B is composed of an extended short section B1, a middle coupling B2, a pump barrel B3, and a pump barrel upper joint B4. The pump barrel upper joint B4 is provided with an oil pipe thread connected to the oil pipe.

[0055] The plunger assembly Z, which is composed of a fork valve seat Z1, a steel ball Z2, a floating valve cover Z3, a plunger Z4, a plunger upper joint Z5 and other parts, is placed in a space formed by a fixed valve assembly G and a pump barrel assembly B.

[0056] Crude oil lifting: According to the production needs of the oil well, the controllable fixed valve low-fault tubular oil pump is connected to the lower end of the production pipe string and lowered into the well; the upper joint of the Z5 plunger is connected to the lower part of the sucker rod string with the plunger assembly Z and lowered into the pump, the upper lift is prevented from impact and driven by the ground pumping unit, the plunger moves upward, the floating valve pair is closed, the fluid in the oil pipe string is discharged from the ground, and the fixed valve pair is opened at the same time, and the fluid in the wellbore enters the pump barrel under the action of pressure difference; the plunger assembly Z moves downward with the sucker rod string, the floating valve pair is opened, the fluid in the pump is replaced above the floating valve pair, and the fixed valve pair is closed at the same time, preparing for upward discharge.

[0057] Anti-gas lock: The plunger is made of thick-walled material and adopts a single floating valve sub-structure. By volume occupation, the gas compression space is reduced, and the gas occupation is forced to be reduced, thereby achieving the technical purpose of reducing gas lock failures.

[0058] Prevent plunger jamming: The combination of long plunger assembly and short pump barrel is beneficial to ensure the quality of the pump barrel coating and plunger processing. At the same time, during the upward and downward movement of the plunger, impurities in the annular gap of the plunger and pump barrel are automatically carried away to prevent sand and scale from forming wedge-shaped deposits in the annular gap, thus preventing plunger and pump barrel jamming.

[0059] Fixed valve failure prevention: The lower joint G1, conduit G2, fixed valve chamber G3, conduit coupling G4, fixed valve seat G5, steel ball G6 and valve cover G7 together form a mechanical impurity deposition space to prevent mechanical impurities that fall into the pump barrel from directly entering the fixed valve pair and causing failure of the sealing function.

[0060] Fixed valve fault handling and oil drainer: When a fixed valve secondary seal failure occurs, lower the pumping rod column to connect the fork valve seat Z1 at the bottom of the plunger assembly Z with the control fork G18, rotate the rod column 180 degrees forward, and the fixed valve steel ball control assembly composed of the torque rod G8, return spring seat G9, buffer spring compartment cover G10, buffer spring G11, buffer spring compartment G12, guide rod G13, track pin G14, reversing spring frame G15, controller compartment G16, spring G17, and control fork G18 realizes positioning and reversing. The track pin G14 runs in the reversing track opened on the inner wall of the reversing spring frame G15. The technology of rotating the two to achieve reversing belongs to the well-known technology in the field. Lift the rod column to make the plunger assembly Z in the oil pipe above the pump barrel. Under the action of the spring force of spring G17, the steel ball G6, valve cover G7, torque rod G8, reset spring seat G9, buffer spring compartment cover G10, buffer spring G11, buffer spring compartment G12 guide rod, G13, track pin G14, reversing spring frame G15, controller compartment G16, spring G17, and control fork G18 are driven upward, and the built-in step of valve cover G7 drives the steel ball G6 to leave the fixed valve seat G5, so that the tubular oil pump can be used for forward well washing. Under the action of hydraulic impact, mechanical impurities, scaling and other faults in the sedimentation cavity of the fixed valve are removed, and the function of the fixed valve pair is restored. During the well repair operation, the corresponding operation is used to realize the oil leakage operation of the tubing string to prevent pollution. The reverse operation can realize the closure of the fixed valve pair and restore the production of the oil pump.

[0061] Positive well washing to remove wax stains: lower the sucker rod column to connect the fork valve seat Z1 at the bottom of the plunger assembly Z with the control fork G18, rotate the rod column 180° forward, and the fixed valve steel ball control assembly composed of the torque rod G8, return spring seat G9, buffer spring compartment cover G10, buffer spring G11, buffer spring compartment G12, guide rod G13, track pin G14, reversing spring frame G15, controller compartment G16, spring G17, and control fork G18 realizes positioning and reversing, and lift the rod column to make the plunger assembly Z into the oil pipe above the pump barrel. Under the action of the spring force of spring G17, the steel ball G6, valve cover G7, torque rod G8, return spring seat G9, buffer spring compartment cover G10, buffer spring G11, buffer spring compartment G12, guide rod G13, track pin G14, reversing spring frame G15, controller compartment G16, spring G17, and control fork G18 are driven upward, and the built-in step of valve cover G7 drives the steel ball G6 to leave the fixed valve seat G5, and the steam injection construction of the tubular oil pump can be realized. After the steam injection is completed, the fixed valve pair can be closed by reverse operation to resume the production of the oil pump.

[0062] Under the condition that the normal oil production function of the conventional tubular oil pump is satisfied, the present invention mainly solves the multiple faults such as air lock, floating valve cover breakage, delayed pipe rod eccentric wear, and the like. When a fault occurs due to sand production, scaling, mechanical debris deposition, or falling objects in the pump, the plunger assembly and the steel ball controller assembly can be used to effectively clear the fault, thereby realizing operations such as normal well washing, wax removal, and scale removal, thereby extending the oil well pump inspection cycle.

[0063] Embodiment 2:

[0064] See also Figure 1 to Figure 2 , the present invention provides a technical solution:

[0065] A controllable fixed valve low-fault tubular oil pump comprises an oil pump assembly, which comprises a pump barrel assembly B and a plunger assembly Z installed inside the pump barrel assembly, the lower end of the oil pump assembly is connected to a fixed valve assembly G, the fixed valve assembly comprises a fixed valve housing, a fixed valve steel ball control assembly, a fixed valve steel ball G6, a fixed valve seat G5, and a valve cover G7, the fixed valve steel ball control assembly, the fixed valve steel ball, the fixed valve seat, and the valve cover are all arranged inside the fixed valve housing, the fixed valve steel ball is seated on the fixed valve seat, the upper end of the fixed valve seat extends into the interior of the valve cover, the upper end of the valve cover is connected to the fixed valve steel ball control assembly, and the upper end of the fixed valve steel ball control assembly is connected to the plunger assembly.

[0066] The fixed valve housing includes a fixed valve chamber G3, a reversing spring frame G15, and a controller chamber G16 which are sequentially connected from bottom to top. The lower end of the fixed valve chamber is connected to the lower joint G1, and the upper end of the controller chamber is connected to the pump barrel assembly via the fixed valve upper joint G19.

[0067] The fixed valve steel ball control assembly includes a torque rod G8, a buffer mechanism, a guide rod G13, a track pin G14, a spring G17, and a control fork G18. The track pin is fixed on the guide rod, and the track pin runs in a reversing track opened on the inner wall of the reversing spring frame. The lower end of the guide rod is connected to the buffer mechanism, the upper end of the torque rod is connected to the buffer mechanism, the lower end is connected to the valve cover, the upper end of the guide rod is connected to the control fork, and the upper end of the control fork is connected to the plunger assembly. The spring is sleeved on the outside of the guide rod, the upper end of the spring is pressed against the limit platform opened on the inner wall of the control fork, and the lower end of the spring is connected to the reversing spring frame.

[0068] The buffer mechanism includes a return spring seat G9, a buffer spring compartment cover G10, a buffer spring G11, and a buffer spring compartment G12. The upper end of the buffer spring compartment is connected to the lower end of the guide rod. The buffer spring is placed inside the buffer spring compartment. The buffer spring is sleeved on the return spring seat, and the lower end of the buffer spring is pressed against a limit platform opened on the outer wall of the return spring seat. The upper end of the buffer spring is pressed against the top wall of the inner cavity of the buffer spring compartment. The buffer spring compartment cover is connected to the lower port of the buffer spring compartment. The inner wall of the lower port of the buffer spring compartment cover limits the axial position of the return spring seat. The lower end of the return spring seat is connected to the torque rod.

[0069] The lower end of the fixed valve seat is connected to the conduit G2 through a conduit coupling G4, and the lower end of the conduit is connected to the lower joint.

[0070] The pump barrel assembly comprises a long and short section B1, a middle coupling B2, a pump barrel B3, and a pump barrel upper joint B4 which are sequentially connected from bottom to top.

[0071] Embodiment 3:

[0072] See also Figure 1 to Figure 2 , the present invention provides a technical solution:

[0073] A controllable fixed valve low-fault tubular oil pump comprises an oil pump assembly, which comprises a pump barrel assembly B and a plunger assembly Z installed inside the pump barrel assembly, the lower end of the oil pump assembly is connected to a fixed valve assembly G, the fixed valve assembly comprises a fixed valve housing, a fixed valve steel ball control assembly, a fixed valve steel ball G6, a fixed valve seat G5, and a valve cover G7, the fixed valve steel ball control assembly, the fixed valve steel ball, the fixed valve seat, and the valve cover are all arranged inside the fixed valve housing, the fixed valve steel ball is seated on the fixed valve seat, the upper end of the fixed valve seat extends into the interior of the valve cover, the upper end of the valve cover is connected to the fixed valve steel ball control assembly, and the upper end of the fixed valve steel ball control assembly is connected to the plunger assembly.

[0074] The fixed valve housing includes a fixed valve chamber G3, a reversing spring frame G15, and a controller chamber G16 which are sequentially connected from bottom to top. The lower end of the fixed valve chamber is connected to the lower joint G1, and the upper end of the controller chamber is connected to the pump barrel assembly via the fixed valve upper joint G19.

[0075] The fixed valve steel ball control assembly includes a torque rod G8, a buffer mechanism, a guide rod G13, a track pin G14, a spring G17, and a control fork G18. The track pin is fixed on the guide rod, and the track pin runs in a reversing track opened on the inner wall of the reversing spring frame. The lower end of the guide rod is connected to the buffer mechanism, the upper end of the torque rod is connected to the buffer mechanism, the lower end is connected to the valve cover, the upper end of the guide rod is connected to the control fork, and the upper end of the control fork is connected to the plunger assembly. The spring is sleeved on the outside of the guide rod, the upper end of the spring is pressed against the limit platform opened on the inner wall of the control fork, and the lower end of the spring is connected to the reversing spring frame.

[0076] The buffer mechanism includes a return spring seat G9, a buffer spring compartment cover G10, a buffer spring G11, and a buffer spring compartment G12. The upper end of the buffer spring compartment is connected to the lower end of the guide rod. The buffer spring is placed inside the buffer spring compartment. The buffer spring is sleeved on the return spring seat, and the lower end of the buffer spring is pressed against a limit platform opened on the outer wall of the return spring seat. The upper end of the buffer spring is pressed against the top wall of the inner cavity of the buffer spring compartment. The buffer spring compartment cover is connected to the lower port of the buffer spring compartment. The inner wall of the lower port of the buffer spring compartment cover limits the axial position of the return spring seat. The lower end of the return spring seat is connected to the torque rod.

[0077] The lower end of the fixed valve seat is connected to the conduit G2 through a conduit coupling G4, and the lower end of the conduit is connected to the lower joint.

[0078] Embodiment 4:

[0079] See also Figure 1 to Figure 2 , the present invention provides a technical solution:

[0080] A controllable fixed valve low-fault tubular oil pump comprises an oil pump assembly, which comprises a pump barrel assembly B and a plunger assembly Z installed inside the pump barrel assembly, the lower end of the oil pump assembly is connected to a fixed valve assembly G, the fixed valve assembly comprises a fixed valve housing, a fixed valve steel ball control assembly, a fixed valve steel ball G6, a fixed valve seat G5, and a valve cover G7, the fixed valve steel ball control assembly, the fixed valve steel ball, the fixed valve seat, and the valve cover are all arranged inside the fixed valve housing, the fixed valve steel ball is seated on the fixed valve seat, the upper end of the fixed valve seat extends into the interior of the valve cover, the upper end of the valve cover is connected to the fixed valve steel ball control assembly, and the upper end of the fixed valve steel ball control assembly is connected to the plunger assembly.

[0081] The fixed valve housing includes a fixed valve chamber G3, a reversing spring frame G15, and a controller chamber G16 which are sequentially connected from bottom to top. The lower end of the fixed valve chamber is connected to the lower joint G1, and the upper end of the controller chamber is connected to the pump barrel assembly via the fixed valve upper joint G19.

[0082] The fixed valve steel ball control assembly includes a torque rod G8, a buffer mechanism, a guide rod G13, a track pin G14, a spring G17, and a control fork G18. The track pin is fixed on the guide rod, and the track pin runs in a reversing track opened on the inner wall of the reversing spring frame. The lower end of the guide rod is connected to the buffer mechanism, the upper end of the torque rod is connected to the buffer mechanism, the lower end is connected to the valve cover, the upper end of the guide rod is connected to the control fork, and the upper end of the control fork is connected to the plunger assembly. The spring is sleeved on the outside of the guide rod, the upper end of the spring is pressed against the limit platform opened on the inner wall of the control fork, and the lower end of the spring is connected to the reversing spring frame.

[0083] The buffer mechanism includes a return spring seat G9, a buffer spring compartment cover G10, a buffer spring G11, and a buffer spring compartment G12. The upper end of the buffer spring compartment is connected to the lower end of the guide rod. The buffer spring is placed inside the buffer spring compartment. The buffer spring is sleeved on the return spring seat, and the lower end of the buffer spring is pressed against a limit platform opened on the outer wall of the return spring seat. The upper end of the buffer spring is pressed against the top wall of the inner cavity of the buffer spring compartment. The buffer spring compartment cover is connected to the lower port of the buffer spring compartment. The inner wall of the lower port of the buffer spring compartment cover limits the axial position of the return spring seat. The lower end of the return spring seat is connected to the torque rod.

[0084] Embodiment 5:

[0085] See also Figure 1 to Figure 2 , the present invention provides a technical solution:

[0086] A controllable fixed valve low-fault tubular oil pump comprises an oil pump assembly, which comprises a pump barrel assembly B and a plunger assembly Z installed inside the pump barrel assembly, the lower end of the oil pump assembly is connected to a fixed valve assembly G, the fixed valve assembly comprises a fixed valve housing, a fixed valve steel ball control assembly, a fixed valve steel ball G6, a fixed valve seat G5, and a valve cover G7, the fixed valve steel ball control assembly, the fixed valve steel ball, the fixed valve seat, and the valve cover are all arranged inside the fixed valve housing, the fixed valve steel ball is seated on the fixed valve seat, the upper end of the fixed valve seat extends into the interior of the valve cover, the upper end of the valve cover is connected to the fixed valve steel ball control assembly, and the upper end of the fixed valve steel ball control assembly is connected to the plunger assembly.

[0087] The fixed valve housing includes a fixed valve chamber G3, a reversing spring frame G15, and a controller chamber G16 which are sequentially connected from bottom to top. The lower end of the fixed valve chamber is connected to the lower joint G1, and the upper end of the controller chamber is connected to the pump barrel assembly via the fixed valve upper joint G19.

[0088] The fixed valve steel ball control assembly includes a torque rod G8, a buffer mechanism, a guide rod G13, a track pin G14, a spring G17, and a control fork G18. The track pin is fixed on the guide rod, and the track pin runs in a reversing track opened on the inner wall of the reversing spring frame. The lower end of the guide rod is connected to the buffer mechanism, the upper end of the torque rod is connected to the buffer mechanism, the lower end is connected to the valve cover, the upper end of the guide rod is connected to the control fork, and the upper end of the control fork is connected to the plunger assembly. The spring is sleeved on the outside of the guide rod, the upper end of the spring is pressed against the limit platform opened on the inner wall of the control fork, and the lower end of the spring is connected to the reversing spring frame.

[0089] Although all the above embodiments use Figure 1 to Figure 2 However, as a person skilled in the art can clearly know, there is no need to provide a separate drawing to represent, as long as the missing parts or structural features in the embodiment are removed from the drawing. This is clear to those skilled in the art. Of course, the embodiment with more parts is only the optimal embodiment, and the embodiment with fewer parts is the basic embodiment, but it can also achieve the basic purpose of the invention, so all of them are within the scope of protection of the present invention.

[0090] All parts and components not discussed in detail in this application and the connection methods of the parts and components in this application belong to the well-known technology in this technical field and will not be described in detail, such as welding, threaded connection, etc.

[0091] In the present invention, the term "plurality" refers to two or more than two, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0092] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “front” and “back” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the present invention.

[0093] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0094] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A controllable solid valve low-fault tubular oil pump, comprising an oil pump assembly, wherein the oil pump assembly comprises a pump barrel assembly and a plunger assembly installed inside the pump barrel assembly, characterized in that: The lower end of the oil pump assembly is connected to the fixed valve assembly, and the fixed valve assembly includes a fixed valve housing, a fixed valve steel ball control assembly, a fixed valve steel ball, a fixed valve seat, and a valve cover. The fixed valve steel ball control assembly, the fixed valve steel ball, the fixed valve seat, and the valve cover are all arranged inside the fixed valve housing, and the fixed valve steel ball is seated on the fixed valve seat. The upper end of the fixed valve seat extends into the interior of the valve cover, and the upper end of the valve cover is connected to the fixed valve steel ball control assembly, and the upper end of the fixed valve steel ball control assembly is connected to the plunger assembly; The fixed valve steel ball control assembly includes a torque rod, a buffer mechanism, a guide rod, a track pin, and a control fork. The track pin is fixed on the guide rod, and the track pin runs in a reversing track opened on the inner wall of the reversing spring frame. The lower end of the guide rod is connected to the buffer mechanism, the upper end of the torque rod is connected to the buffer mechanism, the lower end is connected to the valve cover, the upper end of the guide rod is connected to the control fork, and the upper end of the control fork is connected to the plunger assembly; it also includes a spring, the spring is sleeved on the outside of the guide rod, the upper end of the spring is pressed on the limit platform opened on the inner wall of the control fork, and the lower end of the spring is connected to the reversing spring frame; The plunger assembly comprises a shift fork valve seat, a floating valve cover, a plunger, and a plunger upper joint which are sequentially connected from bottom to top, and a shift fork valve steel ball is seated on the shift fork valve seat.

2. The controllable solid valve low-fault tubular oil pump according to claim 1, characterized in that: The fixed valve housing includes a fixed valve compartment, a reversing spring frame, and a controller compartment which are sequentially connected from bottom to top. The lower end of the fixed valve compartment is connected to a lower joint, and the upper end of the controller compartment is connected to a pump barrel assembly via a fixed valve upper joint.

3. The controllable solid valve low-fault tubular oil pump according to claim 1, characterized in that: The buffer mechanism includes a return spring seat, a buffer spring compartment cover, a buffer spring, and a buffer spring compartment. The upper end of the buffer spring compartment is connected to the lower end of the guide rod, the buffer spring is placed inside the buffer spring compartment, the buffer spring is sleeved on the return spring seat, and the lower end of the buffer spring is pressed against a limit platform opened on the outer wall of the return spring seat, the upper end of the buffer spring is pressed against the top wall of the inner cavity of the buffer spring compartment, the buffer spring compartment cover is connected to the lower port of the buffer spring compartment, the inner wall of the lower port of the buffer spring compartment cover limits the axial position of the return spring seat, and the lower end of the return spring seat is connected to the torque rod.

4. The controllable solid valve low-fault tubular oil pump according to claim 2 or 3, characterized in that: The lower end of the fixed valve seat is connected to the conduit through a conduit coupling, and the lower end of the conduit is connected to the lower joint.

5. The controllable solid valve low-fault tubular oil pump according to claim 2 or 3, characterized in that: The pump barrel assembly comprises an extended short section, a middle coupling, a pump barrel, and a pump barrel upper joint which are sequentially connected from bottom to top.

6. A method for using the controllable solid valve low-fault tubular oil pump as claimed in claim 1, characterized in that: The following steps are involved: Crude oil lifting method: according to the production needs of the oil well, the controllable fixed valve low-fault tubular pump is connected to the lower end of the production pipe string and lowered into the well; the plunger upper joint is connected to the lower end of the sucker rod string with the plunger assembly and lowered into the pump, the upper lift is prevented from impact and driven by the ground pumping unit, the plunger moves upward, the floating valve pair is closed, the fluid in the oil pipe string is discharged from the ground, and the fixed valve pair is opened at the same time, and the fluid in the wellbore enters the pump barrel under the action of the pressure difference; The plunger assembly moves downward along with the sucker rod, the floating valve pair opens, the fluid in the pump is replaced above the floating valve pair, and the fixed valve pair closes at the same time, preparing for upward discharge; Fixed valve fault handling and oil leakage method: When a fixed valve auxiliary seal failure occurs, lower the pumping rod column to connect the fork valve seat at the bottom of the plunger assembly with the control fork, rotate the rod column 180 degrees forward, and the fixed valve steel ball control assembly composed of the torque rod, reset spring seat, buffer spring compartment cover, buffer spring, buffer spring compartment, guide rod, track pin, reversing spring frame, controller compartment, spring, and control fork realizes positioning and reversing. Lift the rod column to move the plunger assembly into the oil pipe above the pump barrel; under the action of the spring force, drive the steel ball, valve cover, torque rod, The reset spring seat, buffer spring bin cover, buffer spring, buffer spring bin, guide rod, track pin, reversing spring frame, controller bin, spring and control fork move upward, and the built-in step of the valve cover drives the steel ball to leave the fixed valve seat, so that the tubular oil pump can be used for forward well washing. Under the action of hydraulic impact, mechanical impurities, scaling and other faults in the sedimentation cavity of the fixed valve are cleared, and the function of the fixed valve pair is restored. During the well repair operation, the oil leakage operation of the tubing is realized through corresponding operations to prevent pollution. The reverse operation can realize the closure of the fixed valve pair and restore the production of the oil pump.

7. The method for using the controllable solid valve low-fault tubular oil pump according to claim 6, characterized in that: The following steps are involved: Methods to prevent plunger jamming: Adopting a long plunger assembly and a short pump barrel combined process is beneficial to ensuring the quality of the pump barrel coating and plunger processing. At the same time, during the upward and downward movement of the plunger, impurities in the annular gap of the plunger and pump barrel are automatically carried away to prevent sand and scale from forming wedge-shaped deposits in the annular gap, thereby preventing plunger and pump barrel jamming.

8. The method for using the controllable solid valve low-fault tubular oil pump according to claim 6, characterized in that: The following steps are involved: Methods for preventing fixed valve failure: The lower joint, conduit, fixed valve chamber, conduit coupling, fixed valve seat, steel ball and valve cover together form a space for the deposition of mechanical impurities, which prevents mechanical impurities that fall into the pump barrel from directly entering the fixed valve pair and causing failure of the sealing function.

9. The method for using the controllable solid valve low-fault tubular oil pump according to claim 6, characterized in that: The following steps are involved: The method of washing wells and clearing wax scales is as follows: lower the sucker rod column to connect the fork valve seat at the bottom of the plunger assembly with the control fork, rotate the rod column 180 degrees forward, and the fixed valve steel ball control assembly composed of the torque rod, reset spring seat, buffer spring bin cover, buffer spring, buffer spring bin, guide rod, track pin, reversing spring frame, controller bin, spring, and control fork realizes positioning and reversing, and lift the rod column to make the plunger assembly into the oil pipe above the pump barrel; under the action of the spring force, the steel ball, valve cover, torque rod, reset spring seat, buffer spring bin cover, buffer spring, buffer spring bin, guide rod, track pin, reversing spring frame, controller bin, spring, and control fork are driven upward, and the built-in step of the valve cover drives the steel ball to leave the fixed valve seat, so that the steam injection construction of the tubular oil pump oil pipe can be realized; after the steam injection is completed, the fixed valve pair can be closed by reverse operation to resume the production of the oil pump.

Images