Solid plunger double-acting separate-pumping and mixed-discharging whole-barrel type oil well pump

Abstract

The utility model relates to the technical field of oil well pumps, in particular to a solid plunger double-acting separate-pumping and mixed-discharging whole-barrel type oil well pump which comprises an upper pump barrel and a lower pump barrel which are fixedly arranged from top to bottom, the inner diameter of the upper pump barrel is smaller than that of the lower pump barrel, an oil inlet and outlet connector is connected between the upper pump barrel and the lower pump barrel, and a lower pump solid plunger matched with the lower pump barrel in inner diameter is vertically arranged in the lower pump barrel in a sliding mode. And the upper end part of the lower pump solid plunger is fixedly connected with an upper pump solid plunger which is arranged along the vertical direction in a sliding manner and is matched with the inner diameter of the upper pump cylinder. The problems that in the prior art, the working clearance between an upper pump and a lower pump is large, the pump efficiency is low, and air locking of a one-way valve is prone to occurring are solved; and the problem that a floating one-way valve is arranged on an existing plunger, so that the breakage rate of a plunger assembly is increased is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil extraction pumps, in particular to a solid plunger double-acting separate pumping and mixing-out integral barrel type oil extraction pump. Background Art

[0002] At present, the upper valve cover of the plunger of the integral barrel oil extraction pump used in oil well production is sequentially connected by a plunger cover upper joint, a plunger rod and a lower valve cover with a ball valve. The oil outlet flow channel adopts a cylindrical space type flow channel. Once the sand production is serious, the sand suspends above the upper valve cover of the plunger, accumulates more and more and cannot be carried away, and finally causes the defect that the piston is stuck by sand in the pump barrel. At the same time, once the oil extraction pump stops pumping, the sand above the upper valve cover of the plunger sinks from the liquid, and the sand will block the oil outlet hole of the upper valve cover, making the oil well unable to produce normally when it starts pumping again.

[0003] A patent with the publication number CN2695677Y is disclosed in the prior art. This solution consists of a pump barrel with upper and lower collars at both ends and a built-in plunger. The upper and lower ends of the plunger are respectively provided with inlet and outlet valves. A universal rotator is connected to the upper head end of the plunger; a propeller thrust device with a spiral wire groove and a torque wire groove is connected to the lower head end of the plunger. Carbon fiber expansion and contraction functional units are respectively arranged at the upper and lower ends inside the plunger. The functional unit is composed of a hemispherical column valve with three limiting shafts and a carbon fiber expansion and contraction ring with three slideway holes. The axis of the slideway hole of the carbon fiber expansion and contraction ring forms a taper angle with the axis of the plunger. The limiting shafts of the hemispherical column valve are placed in the slideway holes of the carbon fiber expansion and contraction ring and can move up and down. The inlet valve is connected to a fixed valve unit body through the lower collar and then connected to the joint. The working section of the plunger of the utility model can always maintain a good state, eliminating the eccentric wear of the sucker rod to the tubing, preventing pump jamming and sand jamming, and prolonging the service life of the pump; protecting the oil well, reducing the number of operations, and reducing the oil production cost.

[0004] With the use of the existing devices including the above patent, the deficiencies of this technology have gradually emerged, mainly manifested in the following aspects:

[0005] First, the working clearance between the upper pump and the lower pump is large, the pump efficiency is low, and the phenomenon of one-way valve air lock is likely to occur.

[0006] Second, a floating one-way valve is arranged on the existing plunger, resulting in an increased breakage rate of the plunger assembly.

[0007] To sum up, the prior art obviously has inconveniences and defects in actual use, so it is necessary to be improved. Content of the Utility Model

[0008] Aiming at the defects in the prior art, the utility model solves the problems in the traditional technology that the working clearance between the upper pump and the lower pump is large, the pump efficiency is low, and the phenomenon of one-way valve air lock is likely to occur; and a floating one-way valve is arranged on the existing plunger, resulting in an increased breakage rate of the plunger assembly.

[0009] To solve the above problems, the present utility model provides the following technical solutions:

[0010] A solid plunger double-acting separate pumping and mixing integrated barrel type oil pump, comprising an upper pump barrel and a lower pump barrel fixedly arranged from top to bottom. The inner diameter of the upper pump barrel is smaller than that of the lower pump barrel. An oil inlet and outlet joint is connected between the upper pump barrel and the lower pump barrel. A lower pump solid plunger that slides vertically is arranged in the lower pump barrel and matches the inner diameter thereof. The upper end of the lower pump solid plunger is fixedly connected with an upper pump solid plunger that slides vertically and matches the inner diameter of the upper pump barrel.

[0011] As an optimized solution, the lower port of the lower pump barrel is connected with a shunt joint. An upper fixed valve is arranged in the shunt joint. The lower end of the shunt joint is connected with a lower fixed valve.

[0012] As an optimized solution, the upper end of the outer wall of the oil inlet and outlet joint is connected with an upper outer pipe, and the lower end of the outer wall of the oil inlet and outlet joint is connected with a lower outer pipe.

[0013] As an optimized solution, a first upper oil passage that is connected to the upper end of the upper fixed valve is arranged in the shunt joint. The first upper oil passage is also connected to the area between the lower pump barrel and the lower outer pipe.

[0014] As an optimized solution, a second upper oil passage that is connected to the lower end of the upper fixed valve is also arranged in the shunt joint. The second upper oil passage is also connected to the lower port of the lower pump barrel.

[0015] As an optimized solution, the oil inlet and outlet joint is provided with a communication passage that connects the area between the lower pump barrel and the lower outer pipe and the area between the upper pump barrel and the upper outer pipe.

[0016] As an optimized solution, the oil inlet and outlet joint is provided with an oil outlet check valve that connects the inner cavity of the lower pump barrel and the area between the upper pump barrel and the upper outer pipe.

[0017] As an optimized solution, the oil inlet and outlet joint is provided with an oil inlet passage that connects the inner cavity of the lower pump barrel with the outside. An oil inlet check valve is arranged in the oil inlet passage.

[0018] As an optimized solution, a centralizing joint is fixedly arranged between the upper outer pipe and the upper pump barrel.

[0019] As an optimized solution, the upper end of the upper outer pipe is connected with an oil pipe.

[0020] As an optimized solution, the upper end of the upper pump solid plunger is connected with a sucker rod.

[0021] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0022] Stratified oil production is achieved, and the working clearance between the upper pump and the lower pump is small, the pump efficiency is high, and the phenomenon of air lock in the check valve is effectively prevented;

[0023] There is no floating check valve for the plunger, the strength of the plunger is high, and the breakage and disconnection rate of the plunger assembly is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0025] Figure 1 It is a schematic structural diagram of the present utility model;

[0026] Figure 2 It is a schematic diagram of the oil flow direction during the upstroke of the present utility model;

[0027] Figure 3 It is a schematic diagram of the oil flow direction during the downstroke of the present utility model.

[0028] In the figure: 1 - upper pump barrel; 2 - lower pump barrel; 3 - oil inlet and outlet joint; 4 - upper solid plunger of the pump; 5 - lower solid plunger of the pump; 6 - shunt joint; 7 - upper fixed valve; 8 - lower fixed valve; 9 - first upper oil channel; 10 - second upper oil channel; 11 - communication channel; 12 - outlet check valve; 13 - inlet oil channel; 14 - inlet check valve; 15 - centralizer joint; 16 - tubing; 17 - sucker rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The following will describe in detail the embodiments of the technical solutions of the present utility model in conjunction with the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present utility model, so they are only examples and cannot be used to limit the protection scope of the present utility model.

[0030] As Figures 1 to 3 shown, the solid plunger double-acting separate pumping and mixed-out integral barrel type oil pump includes an upper pump barrel 1 and a lower pump barrel 2 fixedly arranged from top to bottom. The inner diameter of the upper pump barrel 1 is smaller than that of the lower pump barrel 2. An oil inlet and outlet joint 3 is connected between the upper pump barrel 1 and the lower pump barrel 2. A lower solid plunger 5 matching its inner diameter is slidably arranged vertically in the lower pump barrel 2. The upper end of the lower solid plunger 5 is fixedly connected with an upper solid plunger 4 slidably arranged vertically and matching the inner diameter of the upper pump barrel 1.

[0031] The lower port of the lower pump barrel 2 is connected with a shunt joint 6. An upper fixed valve 7 is arranged in the shunt joint 6, and the lower end of the shunt joint 6 is connected with a lower fixed valve 8.

[0032] The upper end of the outer wall of the oil inlet and outlet joint 3 is connected with an upper outer pipe, and the lower end of the outer wall of the oil inlet and outlet joint 3 is connected with a lower outer pipe.

[0033] A first upper oil passage 9 communicating with the upper end of the upper fixed valve 7 is arranged in the shunt joint 6. The first upper oil passage 9 also communicates with the area between the lower pump barrel 2 and the lower outer pipe.

[0034] A second upper oil passage 10 communicating with the lower end of the upper fixed valve 7 is also arranged in the shunt joint 6. The second upper oil passage 10 also communicates with the lower port of the lower pump barrel 2.

[0035] The oil inlet and outlet joint 3 is provided with a communication passage 11 that communicates the area between the lower pump barrel 2 and the lower outer pipe and the area between the upper pump barrel 1 and the upper outer pipe.

[0036] The oil inlet and outlet joint 3 is provided with an oil outlet check valve 12 that communicates the inner cavity of the lower pump barrel 2 and the area between the upper pump barrel 1 and the upper outer pipe.

[0037] The oil inlet and outlet joint 3 is provided with an oil inlet passage 13 that communicates the inner cavity of the lower pump barrel 2 with the outside. An oil inlet check valve 14 is arranged in the oil inlet passage 13.

[0038] A centralizing joint 15 is fixedly arranged between the upper outer pipe and the upper pump barrel 1.

[0039] The upper end of the upper outer pipe is connected with an oil pipe 16.

[0040] The upper end of the upper pump solid plunger 4 is connected with a sucker rod 17.

[0041] Stratified oil production is realized, and the working clearance between the upper pump and the lower pump is small, the pump efficiency is high, and the phenomenon of air lock of the check valve is effectively prevented;

[0042] There is no floating check valve on the plunger, the plunger has high strength, and the breakage and disconnection rate of the plunger assembly is reduced.

[0043] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered by the scope of the claims and the description of the present invention.

Claims

1. A solid plunger double-acting separate pumping and mixing integrated barrel type oil pump, characterized in that: It includes an upper pump barrel (1) and a lower pump barrel (2) fixedly arranged from top to bottom. The inner diameter of the upper pump barrel (1) is smaller than that of the lower pump barrel (2). An oil inlet and outlet joint (3) is connected between the upper pump barrel (1) and the lower pump barrel (2). A lower pump solid plunger (5) matching the inner diameter of the lower pump barrel (2) is slidably arranged vertically in the lower pump barrel (2). The upper end of the lower pump solid plunger (5) is fixedly connected with an upper pump solid plunger (4) slidably arranged vertically and matching the inner diameter of the upper pump barrel (1).

2. The solid plunger double-acting separate pumping and mixing whole-barrel type oil pump according to claim 1, wherein: The lower port of the lower pump barrel (2) is connected with a shunt joint (6). An upper fixed valve (7) is arranged in the shunt joint (6). The lower end of the shunt joint (6) is connected with a lower fixed valve (8).

3. The solid plunger double-acting separate pumping and mixing integrated barrel type oil pump according to claim 2, characterized in that: The upper end of the outer wall of the oil inlet and outlet joint (3) is connected with an upper outer pipe, and the lower end of the outer wall of the oil inlet and outlet joint (3) is connected with a lower outer pipe.

4. The solid plunger double-acting separate pumping and mixing integrated barrel type oil pump according to claim 3, characterized in that: A first upper oil channel (9) communicating with the upper end of the upper fixed valve (7) is arranged in the shunt joint (6). The first upper oil channel (9) also communicates with the area between the lower pump barrel (2) and the lower outer pipe.

5. The solid plunger double-acting separate pumping and mixing integrated barrel type oil pump according to claim 4, characterized in that: A second upper oil channel (10) communicating with the lower end of the upper fixed valve (7) is also arranged in the shunt joint (6). The second upper oil channel (10) also communicates with the lower port of the lower pump barrel (2).

6. The solid plunger double-acting separate pumping and mixing integral barrel type oil pump according to claim 5, wherein: The oil inlet and outlet joint (3) is provided with a communication channel (11) connecting the area between the lower pump barrel (2) and the lower outer pipe and the area between the upper pump barrel (1) and the upper outer pipe.

7. The solid plunger double-acting separate pumping and mixing whole-barrel type oil pump according to claim 6, characterized in that: The oil inlet and outlet joint (3) is provided with an oil outlet one-way valve (12) connecting the inner cavity of the lower pump barrel (2) and the area between the upper pump barrel (1) and the upper outer pipe.

8. The integral barrel pump for double-acting separate pumping and mixing extraction with a solid plunger according to claim 7, characterized in that: The oil inlet and outlet joint (3) is provided with an oil inlet channel (13) connecting the inner cavity of the lower pump barrel (2) with the outside. An oil inlet one-way valve (14) is arranged in the oil inlet channel (13).

9. The solid plunger double-acting separate pumping and mixing whole barrel type oil pump according to claim 8, characterized in that: A centralizing joint (15) is fixedly arranged between the upper outer pipe and the upper pump barrel (1).

10. The solid plunger double-acting separate pumping and mixing whole barrel type oil pump according to claim 9, characterized in that: The upper end of the upper outer pipe is connected with an oil pipe (16), and the upper end of the upper pump solid plunger (4) is connected with a sucker rod (17).

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