CN210686250U - Double-acting oil-well pump capable of being filled with oil and draining oil - Google Patents

Abstract

The utility model provides a can be full of two effect oil-well pumps that can let out oil. The utility model discloses the method, include: a fixed structure and a movable structure; the upper end of the fixed structure is connected with the oil pipe; the movable structure is arranged in the fixed structure and can move up and down in the fixed structure; the outer tube from top to bottom the suit is in fixed knot constructs's outside, and the bottom seat of outer tube keeps sealed on the constant pressure valve, and the upper end is fixed through compressing tightly the cap, compresses tightly cap and discharge valve thread tightening. The outer pipe is an essential conventional accessory of the long pump, and has the function of preventing the pump barrel from being extruded and deformed by a bent well section, and preventing the pipe column from loosening and tripping in production accidents due to the vibration of the pump during working and the impact of the well wall. The technical scheme of the utility model the current oil-well pump that has provided among the prior art does not set up measure, oil gas mixed pumping, oil pumping inefficiency and no draining function and causes environmental pollution easily and need add bleeder scheduling problem.

Description

Double-acting oil-well pump capable of being filled with oil and draining oil

Technical Field

The utility model relates to an oil field oil pumping equipment technical field especially relates to can be full of the two effect axle oil pumps that can let out oil simultaneously.

Background

The existing oil field generally uses the whole tube type oil-well pump, have very high reliability, especially the processing manufacturing process technology of the pump cylinder and plunger piston cooperation friction pair, practice proves to be more ideal, but there are many unsatisfactory problems in structure, it is too simple primitive and lagging to see always;

the first problem is that no gas-proof measure is provided, oil and gas are mixed and pumped, and the low pump efficiency is inevitable, so that a large amount of energy is wasted, and the oil pumping system is greatly damaged; although the air anchor is arranged at the lower part of the pump, when the pump pumps oil upwards from the air anchor, the pressure is reduced, the dissolved air in the oil is released, so the effect is not good for people to use, the air anchor is arranged above the inlet of the pump, only the oil is fed, the air is not fed, the dissolved air is released after the oil is fed into the pump, and the air exhaust device is arranged at the upper part of the pump, so the problem of air influence can be thoroughly solved.

The other problem is single-acting and double-acting, which are all used for solving the problem of oil wells with high liquid yield, the low-yield well cannot solve the installation problem of an oil inlet valve and an oil outlet valve due to small pump diameter, and cannot solve the sealing problem between a hollow polished rod and an oil pipe, and the low-yield well is not used; the ground reciprocating plunger pump is basically double-acting, the working frequency can be doubled by the double action, the efficiency is high, the abrasion is reduced, the maintenance cost of the underground oil well pump is very high, and the underground reciprocating plunger pump is more double-acting.

The third problem is that only oil can be pumped without downward oil drainage, and sometimes an additional oil drainer reduces the environmental pollution during operation, but is unreliable, often causes oil leakage problem, causes great loss, and is generally used less. The oil well has the great effect of oil drainage, the steam injection, the high-temperature corrosive oil increasing agent injection, the oil pipe hot washing and wax removing and the like of the oil well can be carried out from the oil pipe, so that the pipe lifting operation is saved, the heat loss of 3/4 is reduced, the damage to the well body structure of the sleeve is avoided, the in-pipe hot washing and wax removing are particularly carried out before the operation, the pipe lifting and pump changing are carried out, the environmental pollution during the operation is avoided, the labor environment of operators is improved, and the problems which need to be solved for energy conservation and environmental protection are solved. In a word, the oil well pump is in a core position in the oil pumping system, and in order to thoroughly solve the problems of low efficiency, low pump efficiency, large horse-drawn trolley, difficult work diagram explanation, large metering error and the like of the oil pumping system which are always difficult to solve, all the problems can be solved easily and unexpected effects can be possibly generated.

Aiming at the problems in the prior art, a novel double-acting oil well pump capable of draining oil is researched and designed, so that the problem in the prior art is very necessary to be solved.

Disclosure of Invention

According to the technical problems that the prior oil well pump provided in the prior art is not provided with a gas-proof measure, oil gas mixed pumping, low oil pumping efficiency and no oil drainage function easily causes environmental pollution, an oil drainer is required to be additionally arranged, and the dual-acting oil well pump capable of draining oil is provided for solving the problems in the prior art.

The utility model discloses a technical means as follows:

a dual action pump capable of being filled with drippable oil, said dual action pump comprising: a fixed structure and a movable structure; the upper end of the fixed structure is connected with the oil pipe; the movable structure is arranged in the fixed structure and can move up and down in the fixed structure; the fixing structure includes: the device comprises an oil pipe joint, an upper cylinder sleeve, an exhaust valve, a pump barrel, an oil inlet valve, a lower pump barrel joint, a fixed valve, a lower cylinder sleeve and a constant pressure valve; the upper cylinder sleeve is connected with an oil pipe through an oil pipe connector; the upper cylinder sleeve is connected with the pump barrel through an exhaust valve, and the bottom of the pump barrel is connected with the lower cylinder sleeve through a lower joint of the pump barrel; a fixed valve is arranged in the lower cylinder sleeve, a sealing ring D is arranged between the fixed valve and the lower cylinder sleeve, and a constant pressure valve is arranged at the bottom of the lower cylinder sleeve; the movable structure includes: the device comprises an oil rod joint, a hollow polish rod, a sealing sleeve A, a polish rod cylinder sleeve, an anchoring clamp spring, an oil outlet valve, an upper joint, a plunger, a traveling valve and a pipe plug A; the top ends of the hollow polish rods are connected through a polish rod joint polish rod; the polish rod cylinder sleeve is sleeved outside the hollow polish rod, a sealing sleeve A is installed at the top end of the polish rod cylinder sleeve, a sealing ring A is installed in the sealing sleeve A and used for sealing between the top end of the polish rod cylinder sleeve and the outer wall of the hollow polish rod, an anchoring clamp spring is installed at the bottom end of the polish rod cylinder sleeve, and a clamping claw at the lower part of the anchoring clamp spring is clamped on the inner wall of the exhaust; the outer diameter of a clamping jaw of the anchoring clamp spring is larger than that of the sealing ring B; the sealing ring B can be protected from abrasion during assembly; a plurality of sealing rings B are arranged between the polished rod cylinder sleeve and the upper cylinder sleeve; the lower end of the hollow polished rod is provided with an oil outlet valve; the oil outlet valve is connected with the top end of the plunger through an upper joint; the lower end of the plunger is provided with a traveling valve, and the bottom ends of the plunger and the traveling valve are provided with pipe plugs A; after fixing structure is packed into with the active structure, the outer tube from top to bottom suit is in fixing structure's outside, and the bottom seat of outer tube keeps sealed on the constant pressure valve, and the upper end is fixed through compressing tightly the cap, compresses tightly cap and discharge valve thread tightening. The outer pipe is an essential conventional accessory of the long pump, and has the function of preventing the pump barrel from being extruded and deformed by a bent well section, and preventing the pipe column from loosening and tripping in production accidents due to the vibration of the pump during working and the impact of the well wall.

Further, the discharge valve includes: the exhaust valve comprises an exhaust valve body, a valve ball A and a valve seat A; the exhaust valve body is connected with the upper cylinder sleeve and the pump cylinder through threads; the exhaust valve body is provided with at least one windowing, the valve seat A is used for packaging the valve ball A in the windowing and the valve seat through the threaded pile and the outer side of the windowing, the valve ball A can transversely move in the windowing and is separated from the valve seat by means of self-weight droop to form a normally open wall type valve, and flow resistance is minimum.

The exhaust valve is made of high-alloy tungsten steel, has high reliability and small volume, reaches the maximum outer diameter of a pump body which is the same as that of a tubing coupling, and is used for influencing the annular testing of an oil well; the outer wall of the exhaust valve body is provided with a pressing cap in a threaded manner for fastening the outer pipe.

Further, the inlet valve is installed on the outer wall of the pump barrel and comprises: the oil inlet valve comprises an oil inlet valve body, a valve ball A, a valve seat A and a sealing ring C; a plurality of sealing rings C are arranged on the inner side of the oil inlet valve body and used for sealing between the oil inlet valve and the pump cylinder; the valve body of the oil inlet valve and the pump barrel are processed with concentric windows, the valve seat A is arranged on the windows of the valve body of the oil inlet valve and the pump barrel through threads, and the valve ball A is arranged in the window of the pump barrel and can transversely move in the window and droop and separate from the valve seat by dead weight to form the normally open wall valve. If the flow passage is not enough, a plurality of valves forming a group can be arranged on the same section of the pump cylinder ring, meanwhile, when the plunger is at the bottom dead center, the plunger is an oil inlet valve of an upper pump, and when the plunger moves upwards to pass through the oil inlet valve to the top dead center, the exhaust valve is closed, and then the oil inlet valve is used as the exhaust valve of a lower pump.

Further, the oil outlet valve includes: the oil outlet valve comprises an oil outlet valve body, a valve ball A and a valve seat A; the oil outlet valve body is a columnar body, and the upper end and the lower end of the oil outlet valve body are respectively in threaded connection with the hollow polished rod and the upper joint through threads; two runner holes with certain intervals are symmetrically arranged on the middle longitudinal section of the oil outlet valve body, two open windows are symmetrically arranged on the excircle of the vertical section of the oil outlet valve body, the open windows are communicated with the two runner holes, a valve ball A is arranged in each open window, a valve seat A is arranged on each open window of the oil outlet valve body through threads, the valve ball A is packaged in each open window and the valve seat, a ball cover of the valve ball A is formed at intervals between the two runner holes, a wall type normally open valve is formed, and the runner resistance is reduced reliably.

Further, the traveling valve includes: the traveling valve comprises a traveling valve cover body, a valve ball B, a valve seat B and a pipe plug A; the traveling valve cover body is arranged on the upper part of a long thread in the lower end of the plunger through a thread, the valve seat B is arranged in the hole at the upper end of the pipe plug A in a static fit manner and is fixed through cold welding, the pipe plug A is arranged on the lower part of the long thread in the lower end of the plunger through a thread, and the valve ball B is arranged between the traveling valve cover body and the pipe plug A; the traveling valve cover body is provided with a plurality of oil through holes.

Further, the constant pressure valve includes: the constant pressure valve comprises a constant pressure valve body, a valve ball B, a valve seat B, a sealing ring E, a return spring C and a tail pipe joint; the upper part of the constant pressure valve body is arranged at the bottom end of the lower cylinder sleeve through threads, and the lower part of the constant pressure valve body is connected with the top end of the tail pipe joint through threads; a valve seat B is arranged between the valve body of the constant pressure valve and the tail pipe joint, a return spring is arranged in the tail pipe joint, and a valve ball B is arranged on the return spring and is jacked up by the return spring, so that the upper part of the valve ball B is abutted against the valve seat B; a fixed valve mandril is arranged at the center of the top of the valve body of the constant pressure valve; the outer wall of the constant pressure valve body is connected with the outer pipe in a sealing mode through a sealing ring E.

Further, the fixed valve includes: the device comprises a fixed valve body, a valve ball B, a valve seat B, a traveling valve ejector rod, a clamping block, a return spring A, a sealing ring D, a pipe plug B and a return spring B; the fixed valve body is hermetically arranged in the lower cylinder sleeve through a sealing ring D; the pipe plug B is arranged at the lower part of the fixed valve body through threads, a valve seat B is clamped and fixed between the pipe plug B and the fixed valve body, and a valve ball B is placed on the valve seat B; a traveling valve ejector rod is arranged at the center of the top of the fixed valve body; a plurality of square holes are formed in the outer circumference of the top of the valve body of the fixed valve, clamping blocks are arranged in the holes and clamped in an annular groove in the top end of the lower cylinder sleeve, a plurality of return springs A are arranged in the clamping blocks, and the clamping blocks are pushed outwards and clamped in the annular groove in the upper end of the lower cylinder sleeve so that the fixed valve is positioned when the fixed valve normally works; the fixed valve is supported on the upper part of the constant pressure valve through a return spring B, so that decompression and return can be guaranteed; the fixed valve ejector rod is inserted into the pipe plug B from the bottom, and a certain distance is reserved between the fixed valve ejector rod and the valve ball B.

Furthermore, the lower end of the outer pipe is seated on the shoulder of the constant pressure valve body and is sealed by a sealing ring E, and the upper end of the outer pipe is fixed on the outer wall of the exhaust valve body by a pressing cap; the upper end of the outer pipe is provided with a plurality of oil inlet gaps, and oil-gas separation oil enters the annular oil reservoir between the outer pipe and the pump barrel downwards and is communicated with the fixed valve through a pore passage at the lower part of the lower cylinder sleeve.

Furthermore, the length of the polished rod cylinder sleeve is equal to the length of the plunger, the movable fit precision of the polished rod cylinder sleeve and the hollow polished rod is equal to the primary precision of the oil well pump, meanwhile, the polished rod cylinder sleeve is matched with a sealing sleeve A of a sealing ring A, and the polished rod cylinder sleeve is provided with a mechanical seal and a soft seal, and the outer diameter of the polished rod cylinder sleeve is provided with a sealing ring B.

Furthermore, the middle part of the oil outlet valve body is subjected to necking treatment, the upper part of the oil outlet valve body is of a wedge structure, and the wedge structure is used for anchoring an unlocking mechanism of a clamp spring jaw, so that the plunger can be conveniently lifted out of the ground for maintenance; the upper part of the oil outlet valve body is provided with an oil through hole.

Compared with the prior art, the utility model has the advantages of it is following:

1. the utility model provides a can be full of two effect oil-well pumps that can let out oil, its discharge valve is the wall type normally open valve that is made by the tungsten alloy of high wear resistance, high hardness, high corrosion resistance, and the volume is small, can install on the coupling wall of pipe, and flow resistance is little, and the switching is quick, when the runner is not enough, can make up the group valve structure by more than two;

2. the utility model provides a can be full of double-acting oil-well pump that can let out oil, its valve body of delivery valve is the binary channels, adorns two wall type normally open valves in the position that the cross-section is 90 and all communicates with each other with two passageways respectively, and the next door of binary channels becomes the ball cover of bivalve ball, has both guaranteed that the valve ball can not drop inwards, has also increased the flow simultaneously;

3. the utility model provides a can be full of double-acting oil-well pump that can let out oil, the valve body top of delivery valve designs into the unlocking device of anchoring jump ring jack catch, can simply and swiftly unlock anchoring jump ring, is convenient for demolish the plunger;

4. the utility model provides a double-acting oil well pump which can be filled with oil and can drain oil, a polished rod cylinder sleeve is a high-precision pump cylinder with the length larger than a plunger, and is matched with a sand-proof high-temperature-resistant corrosion-resistant wear-resistant sealing element with a compensation function, and the hollow polished rod is sealed by a soft-hard combination;

5. the utility model provides a can be full of double-acting oil-well pump that can let out oil, the lower part after the valve ball is opened of the oil outlet pore of standing valve body, the clearance of valve bonnet and valve ball is little, and be the enclosed space above the valve ball, and it is the toroidal surface to hit the valve bonnet on the valve ball, eliminates the high-speed oil stream to the washing away of valve ball, becomes the bumper shock absorber of valve ball in the enclosed space, alleviates the powerful striking of high frequency of valve ball and valve seat and valve bonnet and prolongs life;

6. the utility model provides a double-acting oil well pump which can be filled with oil and can drain oil, the fixed valve is provided with a fixture block for positioning, the traveling pipe plug is released from the fixture block and moves down during oil draining, and the oil inlet channel of the lower cylinder sleeve is sealed to prevent the high-pressure oil flow from damaging the oil inlet gap;

7. the utility model provides a can be full of two effect oil-well pumps that can let out oil, traveling valve cover body dress is in the plunger, and the disk seat is fixed and is become an organic whole on the stopcock, has subtracted original independent valve bonnet, eliminates the biggest resistance point of runner, has shortened the length of plunger

8. The utility model provides a can be full of the double-acting oil-well pump that can let out oil, the disk seat, the valve ball and the spring of constant pressure valve are installed in the coupling of the tail pipe in an inverted manner, simple structure, not only guarantee the safe work of the oil reservoir, but also make the draining go on smoothly;

9. the utility model provides a can be full of two effect oil-well pumps that can drain, go up the fuel tap, go up the air vent and all adopt the wall type ball valve, reliable operation makes the biggest external diameter phi 89 mm and 2 of pump_7/8The tubing coupling is the same, and the work such as annular space test is not influenced.

10. The utility model provides a can be full of double-acting oil-well pump that can let out oil possesses reliable full function for two effects, big pump footpath, big stroke play effective role, make all old and difficult problems of oil pumping system all stand up to the throne, be the core technology of the automatic oil pumping method of waiting the pump to be full of and rerunning, the automation neither is the sensitivity of sensor nor the gao ming of software but because the pump can be full of the innovation of back hardware; the dynamic load of the interference diagram test is reduced to be close to the result.

11. The utility model provides a can be full of two effect oil-well pumps that can drain, double action is reducing the stroke number and reducing one time under the condition of reduction maximum load and counter weight, and the descending potential energy saving of make full use of beam hanger reduces wearing and tearing.

12. The utility model provides a can be full of the two effect oil-well pumps that can drain, the draining function is maintained and the implementation of increasing production measure brings convenience for daily production, effectual reduce cost, simultaneously, has solved the environmental pollution and the operation environment of workover, becomes green technical scheme.

To sum up, use the technical scheme of the utility model the current oil-well pump that has provided among the prior art has solved not set up measure, the oil gas of gas defense and has thoughtlessly taken out, oil pumping inefficiency and do not have the draining function and cause environmental pollution easily and need add bleeder scheduling problem.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of section I of FIG. 1;

FIG. 3 is an enlarged view of section II of FIG. 1;

FIG. 4 is an enlarged view of section III of FIG. 1;

FIG. 5 is an enlarged view of section IV of FIG. 1;

FIG. 6 is an enlarged view of section V of FIG. 1;

FIG. 7 is an enlarged view of section VI of FIG. 1;

FIG. 8 is a view A-A of FIG. 1;

fig. 9 is a top view of the present invention;

FIG. 10 is a J-J view of FIG. 9;

fig. 11 is a working principle diagram of the present invention.

In the figure: 0. the device comprises an oil pipe 1, an oil rod joint 2, a hollow polished rod 3, a sealing ring A4, a sealing sleeve A5, an oil pipe joint 6, a polished rod cylinder sleeve 7, an upper cylinder sleeve 8, a sealing ring B9, an anchoring clamp spring 10, an exhaust valve body 11, a pressing cap 12, an outer pipe 13, a ball valve A14, a valve seat A15, a pump barrel 16, an oil inlet valve body 17, a sealing ring C18, an oil outlet valve body 19, an upper joint 20, a plunger 21, a traveling valve cover body 22, a valve ball B23, a valve seat B24, a pipe plug A25, a pump barrel lower joint 26, a traveling valve ejector rod 27, a clamping block 28, a return spring A29, a fixed valve body 30, a lower cylinder sleeve 31, a sealing ring D32, a pipe plug B33, a return spring B34, a fixed valve ejector rod 35, a constant pressure valve, A tail pipe joint A, an exhaust valve B, an oil inlet valve C, an oil outlet valve D, a traveling valve E, a constant pressure valve F and a fixed valve.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element in question must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

As shown in the figure, the utility model provides a can be full of double-acting oil-well pump that can let out oil has connected gradually oil pipe joint 5, upper cylinder cover 7, discharge valve body 10, pump barrel 15, pump barrel lower clutch 25, lower cylinder cover 30, constant pressure valve body 35, the lower part is tail pipe joint 38 from oil pipe downwards. The tail pipe joint 38 is provided with a return spring C37, a valve ball B22 and a valve seat B23. A fixed valve mandril 34 is arranged at the center of the constant pressure valve body 29. The lower cylinder sleeve 30 is internally provided with a fixed valve F which keeps sealing with the lower cylinder sleeve and can move up and down, the fixed valve F is internally provided with a valve ball B22, a valve seat B23 and a fixed pipe plug B32, the lower part of the fixed valve F is provided with a return spring B33, the annular wall of the upper part is provided with a plurality of openings, the openings are internally provided with clamping blocks 27, the clamping blocks 27 are internally provided with return springs A28, the clamping blocks 27 are outwards clamped in an annular groove at the top of the lower cylinder sleeve 30, and the center of the top of the fixed valve F is provided with an oil. The upper middle part of the pump barrel 15 is sleeved with an oil inlet valve B. The outer tube 12 is arranged outside the pump barrel 15, the lower end of the outer tube 12 is seated on the outer shoulder of the constant pressure valve body 35 and keeps sealed, the upper end of the outer tube 12 is fixed on the exhaust valve body 10 through the pressing sleeve 11, a plurality of gaps are formed in the outer tube 12 at the lower portion of the pressing sleeve 11 and are used as oil inlet channels, and the annular space between the outer tube 12 and the pump barrel 15 becomes an oil reservoir and is kept communicated with the fixed valve F through a hole channel at the lower portion of the lower cylinder sleeve 30. The pump barrel 15 is put into the well along with the oil pipe, a plunger B32 with a traveling valve D at the lower end is upwards connected with an upper connector 19, an oil outlet valve C, a hollow polished rod 2 and a polished rod cylinder sleeve 6 sleeved outside the upper connector in sequence, a sealing ring B8 is arranged outside the polished rod cylinder sleeve 6, a return snap spring B33 is arranged at the lower end, a sealing sleeve A4 is arranged at the upper end, an oil rod connector 1 for centralizing and oil outlet is arranged at the upper end of the hollow polished rod 2, and an oil rod is connected in the oil pipe 0 and put into; down to the plunger 20 into the cylinder 15 and the polish rod sleeve 6 is seated on the exhaust valve body 10. The anchoring clamp spring 9 is also clamped on the inner hole wall of the exhaust valve body 10, at the moment, the outer seal ring B8 of the polished rod cylinder sleeve 6 is sealed with the upper cylinder sleeve 7, the pump is seated to the bottom, the polished rod is clamped on the rope hanger by the square clamp, the impact distance is lifted by manual operation, and then the operation is started by automatic operation.

When the plunger 20 is put into production and goes upwards after being stopped at the bottom dead center, the lower pump below the plunger 20 is in a negative pressure state, the liquid column in the oil reservoir opens the fixed valve F for oil feeding, and when the plunger 20 goes upwards and passes through the oil inlet valve B at the middle upper part of the pump barrel 15 and then is stopped at the top dead center, at this time, if the pump is not filled fully, the liquid level in the oil reservoir for continuously supplying oil to the oil well certainly exceeds the liquid level in the pump, and the pressure in the pump barrel 15 is smaller than the pressure of the oil reservoir; the normally open oil inlet valve B is opened to become an exhaust valve of a lower pump, the oil inlet fixed valve E cannot be closed due to the stop of the plunger 20, oil can be continuously fed until the liquid level reaches the full state of the oil inlet valve B and stops, at the moment, the plunger 20 starts to move downwards, the fixed valve F is closed, the oil opening traveling valve D of the lower pump enters the oil pipe 0 through the plunger 20 and the hollow polished rod 2, the oil in the oil pipe 0 cannot return to the pump cylinder 15 due to the sealing between the polished rod cylinder sleeve 6 and the upper cylinder sleeve 7 and the soft and hard combined sealing between the hollow polished rod 2 and the polished rod cylinder sleeve 6, so that the upper pump is in negative pressure, the oil inlet valve A is opened to feed oil, when the plunger moves downwards to pass through the oil inlet valve B, the oil inlet valve B is opened to feed oil, when the plunger 20 stops at a bottom dead center, if the oil inlet valve A is not fully filled in the pump, the oil inlet valve B, the fixed valve F opens the lower pump to feed oil, the oil inlet valve B, the oil inlet valve A and the traveling valve D are closed, the oil of the upper pump opens the oil outlet valve of the upper pump, the oil enters the oil pipe 0 from the hollow polished rod 2, the lower pump is stopped and delayed until the upper dead center, and the plunger 20 continuously reciprocates downwards after the lower pump is full of oil.

When oil drainage is needed, only automatic operation needs to be switched to manual operation, the plunger 20 is lowered to the bottom, at this time, the pipe plug B32 retracts the fixture block 27 on the fixed valve F to be separated from the clamping groove fixed valve F to move downwards, the return spring B33 is seated on the fixed valve body 35, the pipe plug B32 seals the oil inlet hole of the lower cylinder sleeve 30, the fixed valve ejector rod 34 and the oil outlet valve ejector rod 26 respectively jack up the valve ball B22 of the fixed valve and the floating valve to be separated from the valve seat B23, oil in the oil pipe 0 is discharged from the hollow polished rod 2, the floating valve D and the fixed valve F, the fixed valve E is opened, and the oil is discharged into the oil well from the tail pipe joint 38. After the operation is finished, the plunger 20 is manually lifted to the original position, the constant pressure valve E, the fixed valve F and the clamping block 27 are reset under the action of the return spring, and the operation can be carried out by switching to automatic operation. When the pump needs to be checked, the oil rod is lifted, the upper end of the oil outlet valve body 18 can expand and release the clamping jaws of the anchoring clamping spring 9 to lift the plunger 20 to the ground, if the double-action mode is changed into the single-action mode, only the oil outlet valve B on the upper portion of the plunger 20, a set of changed oil rods such as the hollow polished rod 2 and the polished rod cylinder sleeve 6 and the like are connected to the plunger 20, the well descending can be changed into the single-action mode, and the balance weight needs to be re-adjusted.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (10)

1. A dual action pump capable of being filled with drippable oil, said dual action pump comprising: a fixed structure and a movable structure; the upper end of the fixed structure is connected with an oil pipe (0); the movable structure is arranged in the fixed structure and can move up and down in the fixed structure;

the fixed knot structure include: the device comprises an oil pipe joint (5), an upper cylinder sleeve (7), an exhaust valve (A), a pump cylinder (15), an oil inlet valve (B), a pump cylinder lower joint (25), a fixed valve (F), a lower cylinder sleeve (30) and a constant pressure valve (E); the upper cylinder sleeve (7) is connected with an oil pipe (0) through an oil pipe joint (5); the upper cylinder sleeve (7) is connected with the pump barrel (15) through an exhaust valve (A), and the bottom of the pump barrel (15) is connected with the lower cylinder sleeve (30) through a lower joint (25) of the pump barrel; a fixed valve (F) is arranged in the lower cylinder sleeve (30), a sealing ring D (31) is arranged between the fixed valve (F) and the lower cylinder sleeve (30), and a constant pressure valve (E) is arranged at the bottom of the lower cylinder sleeve (30);

the movable structure comprises: the device comprises an oil rod joint (1), a hollow polished rod (2), a sealing sleeve A (4), a polished rod cylinder sleeve (6), an anchoring clamp spring (9), an oil outlet valve (C), an upper joint (19), a plunger (20), a traveling valve (D) and a pipe plug A (24); the top end of the hollow polish rod (2) is connected with an oil rod through an oil rod joint (1); the polished rod cylinder sleeve (6) is sleeved outside the hollow polished rod (2), a sealing sleeve A (4) is installed at the top end of the polished rod cylinder sleeve (6), a sealing ring A (3) is installed in the sealing sleeve A (4) and used for sealing between the top end of the polished rod cylinder sleeve (6) and the outer wall of the hollow polished rod (2), an anchoring clamping spring (9) is installed at the bottom end of the polished rod cylinder sleeve (6), and a clamping jaw at the lower part of the anchoring clamping spring (9) is clamped on the inner wall of the exhaust valve (A; the outer diameter of a claw of the anchoring clamp spring (9) is larger than that of the sealing ring B (8); the sealing ring B (8) can be protected from being abraded by an oil pipe when the well is lowered; a plurality of sealing rings B (8) are arranged between the polish rod cylinder sleeve (6) and the upper cylinder sleeve (7); the lower end of the hollow polished rod (2) is provided with an oil outlet valve (C); the oil outlet valve (C) is connected with the top end of the plunger (20) through an upper joint (19); a traveling valve (D) is arranged in the lower end of the plunger (20), and a pipe plug A (24) is arranged at the bottom ends of the plunger (20) and the traveling valve (D);

after fixing structure is packed into with the active structure, outer tube (12) from top to bottom suit is in fixing structure's outside, and the bottom seat of outer tube (12) keeps sealed on constant pressure valve (E), and the upper end is fixed through compressing tightly cap (11), compresses tightly cap (11) and discharge valve (A) thread tightening.

2. A double-acting pump as claimed in claim 1, wherein the discharge valve (a) comprises: the exhaust valve comprises an exhaust valve body (10), a valve ball A (13) and a valve seat A (14); the exhaust valve body (10) is connected with the upper cylinder sleeve (7) and the pump cylinder (15) through threads; at least one windowing is arranged on the exhaust valve body (10), the valve seat A (14) encapsulates the valve ball A (13) in the windowing and the valve seat through the threaded pile and the outer side of the windowing, the valve ball A (13) can transversely move in the windowing and is separated from the valve seat by self-weight sagging to form a normally open wall type valve, and the flow resistance is minimum.

3. A double acting pump as claimed in claim 1, wherein the inlet valve (B) is mounted on the outer wall of the pump barrel (15) and comprises: the oil inlet valve comprises an oil inlet valve body (16), a valve ball A (13), a valve seat A (14) and a sealing ring C (17); a plurality of sealing rings C (17) are arranged on the inner side of the oil inlet valve body (16) and used for sealing between the oil inlet valve (B) and the pump cylinder (15); the oil inlet valve body (16) and the pump barrel (15) are processed with concentric windows, the valve seat A (14) is arranged on the windows of the oil inlet valve body (16) and the pump barrel (15) through threads, the valve ball A (13) is arranged in the window of the pump barrel (15) and the valve seat A (14), and the valve ball A (13) can transversely move in the valve seat and can droop and separate from the valve seat by self weight to form a normally open wall type valve.

4. A double acting pump as claimed in claim 1, wherein the delivery valve (C) comprises: an oil outlet valve body (18), a valve ball A (13) and a valve seat A (14); the oil outlet valve body (18) is a columnar body, and the upper end and the lower end of the oil outlet valve body are respectively in threaded connection with the hollow polished rod (2) and the upper joint (19) through threads; two runner holes with certain intervals are symmetrically arranged on the middle longitudinal section of the oil outlet valve body (18), two open windows are symmetrically arranged on the excircle of the vertical section of the oil outlet valve body, the open windows are communicated with the two runner holes, a valve ball A (13) is arranged in each open window, a valve seat A (14) is arranged on the oil outlet valve body (18) through threads, the valve ball A (13) is packaged in the open windows and the valve seat A (14), a ball cover of the valve ball A (13) is formed at intervals between the two runner holes, a wall type normally open valve is formed, and the flow resistance is reduced reliably.

5. A double action pump as claimed in claim 1, wherein said traveling valve (D) comprises: the traveling valve comprises a traveling valve cover body (21), a valve ball B (22), a valve seat B (23) and a pipe plug A (24); the traveling valve cover body (21) is arranged on the upper part of a long thread in the lower end of the plunger (20) through a thread, the valve seat B (23) is arranged in an upper end hole of the pipe plug A (24) in a static fit mode and is fixed through cold welding, the pipe plug A (24) is arranged on the lower part of the long thread in the lower end of the plunger (20) through the thread, and the valve ball B (22) is arranged between the traveling valve cover body (21) and the pipe plug A (24); the traveling valve cover body (21) is provided with a plurality of oil through holes.

6. A double-acting pump as claimed in claim 1, characterised in that said pressure-sustaining valve (E) comprises: the constant pressure valve comprises a constant pressure valve body (35), a valve ball B (22), a valve seat B (23), a sealing ring E (36), a return spring C (37) and a tail pipe joint (38); the upper part of the constant pressure valve body (35) is arranged at the bottom end of the lower cylinder sleeve (30) through threads, and the lower part of the constant pressure valve body is connected with the top end of a tail pipe joint (38) through threads; a valve seat B (23) is arranged between the constant pressure valve body (35) and the tail pipe joint (38), a return spring C (37) is arranged in the tail pipe joint (38), and the valve ball B (22) is arranged on the return spring C (37) and is jacked up by the return spring C (37), so that the upper part of the valve ball B (22) is propped against the valve seat B (23); a fixed valve (F) ejector rod (34) is arranged at the center of the top of the constant pressure valve body (35); the outer wall of the constant pressure valve body (35) is connected with the outer pipe (12) in a sealing mode through a sealing ring E (36).

7. A double-acting pump as claimed in claim 1, characterised in that said standing valve (F) comprises: the device comprises a fixed valve body (29), a valve ball B (22), a valve seat B (23), a traveling valve (D), an ejector rod (26), a fixture block (27), a return spring A (28), a sealing ring D (31), a pipe plug B (32) and a return spring B (33); the fixed valve body (29) is hermetically arranged in the lower cylinder sleeve (30) through a sealing ring D (31); the pipe plug B (32) is arranged at the lower part of the fixed valve body (29) through threads, a valve seat B (23) is clamped and fixed between the pipe plug B (32) and the fixed valve body (29), and a valve ball B (22) is placed on the valve seat B (23); a traveling valve (D) ejector rod (26) is arranged at the center of the top of the fixed valve body (29); a plurality of square holes are formed in the outer circumference of the top of the fixed valve body (29), clamping blocks (27) are arranged in the holes, the clamping blocks (27) are clamped in an annular groove in the top end of the lower cylinder sleeve (30), a plurality of return springs A (28) are arranged in the clamping blocks (27), the clamping blocks are pushed outwards and clamped in the annular groove in the upper end of the lower cylinder sleeve (30), and the fixed valve (F) is positioned when working normally; the fixed valve (F) is supported on the upper part of the constant pressure valve (E) through a return spring B (33), so that decompression and return can be guaranteed; the ejector rod (34) of the fixed valve (F) is inserted into the pipe plug B (32) from the bottom, and a certain distance is reserved between the ejector rod and the valve ball B (22).

8. A double-acting oil-well pump capable of being filled with oil and drained as claimed in claim 6, characterized in that the lower end of the outer tube (12) is seated on the shoulder of the constant pressure valve body (35) and sealed by a sealing ring E (36), and the upper end of the outer tube is fixed on the outer wall of the exhaust valve body (10) by a pressing cap (11); a plurality of oil inlet gaps are formed in the upper end portion of the outer pipe (12), oil-gas separation oil enters the annular oil reservoir between the outer pipe (12) and the pump barrel (15) downwards and is communicated with the fixed valve (F) through a pore passage in the lower portion of the lower cylinder sleeve (30).

9. The oil pump as claimed in claim 1, wherein the length of the polish rod cylinder (6) is equal to the length of the plunger (20), the precision of the movable fit between the polish rod cylinder (6) and the hollow polish rod (2) is equal to the first-order precision of the oil pump, and the seal gland A (4) is provided with a seal ring A (3) and has mechanical seal and soft seal, and the outer diameter of the seal gland is provided with a seal ring B (8).

10. The oil pump as claimed in claim 4, wherein the outlet valve body (18) has a necking portion at its middle part and a wedge structure at its upper part for anchoring the unlocking mechanism of the latch (9) for facilitating the ground maintenance of the plunger (20); the upper part of the oil outlet valve body (18) is provided with an oil through hole.

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