Inclined shaft type oil well pump
By designing a deviated well pump and adopting a flexible reset and mechanical forced reset traveling valve structure, the problems of difficult downhole operation and pump inspection in deviated and directional wells have been solved, achieving the effects of simplifying the operation process, reducing costs and improving efficiency.
Patent Information
- Application Number
- CN202520774196.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-23
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2035-04-23
AI Technical Summary
In existing deviated and directional wells, it is difficult to run and inspect conventional oil pumps, especially in highly deviated wells where it is impossible to replace the plunger alone, resulting in a large workload, low efficiency and high cost.
Design a deviated well oil pump that adopts the conventional tubular pump downhole method and uses a traveling valve structure with elastic reset and mechanical forced reset in the pump to eliminate the influence of well deviation on valve ball reset and simplify the downhole and pump inspection process.
This simplifies downhole and pump inspection operations in highly deviated wells, reduces workload, lowers costs, improves oil production efficiency, and enhances equipment stability and service life.
Smart Images
Figure CN223689917U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a sucker rod pump, in particular to a inclined shaft type sucker rod pump, belongs to oilfield oil production equipment technical field. BACKGROUND
[0002] With the continuous development of oil production technology, the inclined well and directional well are more widely used, which is convenient for the centralized management of oil field. The inclined well and directional well need to use a special inclined shaft type sucker rod pump to carry out oil pumping operation. The ordinary sucker rod pump is easily fixed in the inclined well and directional well, and the valve ball of the fixed valve and the traveling valve cannot be reset and closed smoothly, thereby causing the failure of the sucker rod pump.
[0003] The downhole step of the tubular pump is that the outer part of the sucker rod pump, the pump cylinder, the pump cylinder coupling and the fixed valve assembly are first lowered into the predetermined depth along with the oil pipe, and then the plunger is connected with the sucker rod and lowered into the pump cylinder. However, with the increase of the inclination of the oil well, the difficulty of the plunger entering the pump cylinder increases, so that the sucker rod pump used in the high-inclination well is usually provided with a disconnector, and the pump cylinder and the plunger with the disconnector are lowered into the well along with the oil pipe, and then the sucker rod is connected with the disconnector and extended into the pump cylinder to connect the plunger.
[0004] Although this method solves the problem of lowering the sucker rod pump into the well, the plunger cannot be taken out alone when the pump is checked at regular time. If the gap of the sucker rod pump becomes larger and the pump efficiency decreases after a certain period of production, the plunger with a smaller gap needs to be replaced when the pump is checked, and then the whole oil pipe and the sucker rod pump need to be pulled out, which is a very large workload and is not conducive to oil production.
[0005] Therefore, it is necessary to design a inclined shaft type sucker rod pump which can be lowered into the well and checked like an ordinary well. SUMMARY
[0006] The utility model wants to solve the technical problem in the foregoing, provides a kind of inclined shaft type sucker rod pump, use in high-inclination well, directional well, can be installed by ordinary tubular pump downhole mode, and when the pump is checked at regular time, the oil pipe does not need to be pulled out, greatly reduce the workload of pump checking, improve oil production efficiency;And each valve pair is through elastic reset, forced reset two ways, eliminate the influence of well inclination on valve ball reset, can be normally used in gas high-inclination well.
[0007] In order to solve the above technical problems, the technical scheme adopted by the utility model is as follows: a inclined shaft type sucker rod pump, comprising a pump cylinder, a plunger is arranged inside the pump cylinder, an elastic reset traveling valve is arranged at the upper end of the plunger, a mechanical forced reset traveling valve is arranged at the lower end of the plunger, an upper oil outlet connector is arranged above the elastic reset traveling valve, and a universal joint assembly is arranged above the upper oil outlet connector.
[0008] As a further improvement of the above technical scheme:
[0009] The upper end of the pump barrel is provided with a first pump barrel coupling, the lower end of the pump barrel is provided with a second pump barrel coupling, and the lower end of the second pump barrel coupling is provided with an elastic reset fixed valve.
[0010] The universal joint assembly comprises a lower joint, the lower joint is connected with an upper oil outlet joint, the upper end of the lower joint is provided with a ball head seat, the ball head seat is rotationally connected with a universal ball head rod, the lower end of the universal ball head rod is provided with a ball head, the ball head is embedded in the ball head seat and rotationally connected with the ball head seat, the ball head and the ball head seat are in clearance fit, and the upper end of the universal ball head rod is connected with an upper joint.
[0011] The elastic reset movable valve comprises a movable valve cover, and the top of the movable valve cover is provided with a plurality of uniformly arranged inclined holes.
[0012] The top of the movable valve cover is provided with a first pressing block below the top, and a spring is arranged between the first pressing block and the movable valve cover.
[0013] The lower end of the first pressing block is provided with a first valve ball, the lower end of the first valve ball is provided with a first valve seat, and the lower end of the first valve seat is provided with a pressing joint.
[0014] The mechanical forced reset movable valve comprises a ball head rod, the outer periphery of the ball head rod is provided with a rubber sealing seat, the lower end of the ball head rod is connected with an oil inlet joint, and the lower end of the ball head rod is provided with a guide oil inlet column.
[0015] A plurality of oil inlet channels are arranged on the outer periphery of the guide oil inlet column, and the plurality of oil inlet channels are helical.
[0016] The elastic reset fixed valve comprises a fixed valve cover, the lower end of the fixed valve cover is provided with a second pressing block, a reset spring is arranged between the second pressing block and the fixed valve cover, the lower end of the second pressing block is provided with a second valve ball, the lower end of the second valve ball is provided with a second valve seat, and the lower end of the second valve seat is provided with a fixed valve joint.
[0017] The inside of the movable valve cover is provided with a guide rib.
[0018] The utility model discloses take above technical scheme, and has the following advantages:
[0019] The utility model discloses using the universal joint assembly on the upper section of the plunger, the plunger can swing in three -dimensional space with well deviation, the plunger can easily enter the pump barrel, saves the release joint of the original oil -well pump's disengager component and release joint, and the structure is simpler, not only solves the problem of difficult downhole, but also greatly saves manufacturing cost.
[0020] The utility model discloses that the upper end of whole pump does not have the restriction of release joint, and the plunger can be taken out of the pump barrel with the sucker rod, and it is easier to replace the plunger in pump inspection, greatly reduces pump inspection workload, reduces manpower and material resources consumption, reduces production cost, and improves oil production.
[0021] The utility model discloses a plunger traveling valve pair is equipped with elastic reset traveling valve and mechanical forced reset traveling valve, eliminates the influence of well deviation to valve ball gravity reset, eliminates the influence of gas condition to valve ball reset, can be suitable for more complex well condition, higher safety factor, greatly improves stability.
[0022] The segmented structure of the plunger makes the plunger have certain flexibility and flexibility, when the pump cylinder produces deflection due to well deviation or downhole pressure, can effectively prevent pump clamping under the condition of guaranteeing sealing gap, greatly improves the service life of the whole pump, reduces the maintenance cost.
[0023] In addition, the pumping unit is in normal work, on one hand, the internal force direction of the sucker rod changes alternately with the up-down reciprocating motion of the rod string, the contact surface of the coupling thread of each rod string also changes alternately, resulting in the rotation of the thread surface to the loosening direction; on the other hand, the longitudinal thread bending of the sucker rod also produces a tripping torque when the sucker rod is in the downstroke. When the above two tripping torques are greater than the pretightening torque of the coupling thread of the sucker rod, the coupling thread will be loose and produce reverse buckling. In order to prevent tripping, the product can be connected to the sucker rod, which can effectively eliminate the tripping torque.
[0024] The utility model will be further described in connection with the drawings and examples. DRAWINGS
[0025] Figure 1 It is the structure diagram of the inclined shaft type oil well pump in the utility model embodiment;
[0026] Figure 2 It is the structure diagram of the guide oil inlet column in the utility model embodiment;
[0027] Figure 3 It is the structure diagram of the oil inlet joint in the utility model embodiment;
[0028] Figure 4 It is the structure diagram of the oil inlet joint connecting the guide oil inlet column in the utility model embodiment.
[0029] In the figure: 1 - universal joint assembly, 11 - upper joint, 12 - universal ball head rod, 13 - ball head seat, 14 - lower joint, 15 - ball head, 2 - first pump cylinder coupling, 3 - upper oil outlet joint, 4 - elastic reset floating valve, 41 - floating valve cover, 42 - spring, 43 - first pressing block, 44 - first valve ball, 45 - first valve seat, 46 - compression joint, 47 - inclined hole, 48 - guide rib, 5 - pump cylinder, 6 - plunger, 7 - forced reset floating valve, 71 - ball head rod, 72 - sealing seat, 73 - oil inlet joint, 8 - guide oil inlet column, 81 - oil inlet channel, 9 - elastic reset fixed valve, 91 - reset spring, 92 - second pressing block, 93 - second valve ball, 94 - second valve seat, 95 - fixed valve cover, 96 - fixed valve joint, 10 - second pump cylinder coupling. DETAILED DESCRIPTION
[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0031] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.
[0032] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited. EMBODIMENT
[0033] As Figures 1-4As shown, an inclined shaft type oil well pump comprises a pump barrel 5, a plunger 6 inside the pump barrel 5, an elastic reset traveling valve 4 at the upper end of the plunger 6, a mechanical forced reset traveling valve 7 at the lower end of the plunger 6, an upper oil outlet joint 3 above the elastic reset traveling valve 4, a universal joint assembly 1 above the upper oil outlet joint 3, a first pump barrel joint 2 at the upper end of the pump barrel 5, a second pump barrel joint 10 at the lower end of the pump barrel 5, and an elastic reset fixed valve 9 below the second pump barrel joint 10.
[0034] The universal joint assembly 1 comprises a lower joint 14 connected with the upper oil outlet joint 3, a ball head seat 13 above the lower joint 14, a universal ball head rod 12 rotatably connected with the ball head seat 13, a ball head 15 at the lower end of the universal ball head rod 12, the ball head 15 embedded in the ball head seat 13 and rotatably connected with the ball head seat 13, the ball head 15 and the ball head seat 13 clearance fitted to form a spherical surface hinged pair, the two fitted to form a structure capable of freely rotating in a plane and freely swinging within a 7° conical range; the upper end of the universal ball head rod 12 is connected with an upper joint 11, the upper joint 11 is tightly connected with the universal ball head rod 12 through threads and is provided with an anti-loosening device; the ball head seat 13 is tightly connected with the lower joint 14 through threads to protect the hinged pair, and the lower joint 14 is provided with an oil rod thread. The structure is compact and has large carrying capacity, can simultaneously eliminate the unclamping torque and the alternating stress caused by the axial bending of the oil rod during the working process of the oil rod, and can also eliminate the bending stress of the oil rod. The torque is first applied on the ball head hinged pair, the universal ball head rod 12 rotates, and can rotate infinitely, the threads no longer rotate, thus preventing the unclamping and loosening between the oil rod and the plunger.
[0035] The elastic reset traveling valve 4 comprises a traveling valve cover 41, the traveling valve cover 41 is provided with a guide rib 48 inside to ensure the up-down movement and accurate reset of a first valve ball 44, the top of the traveling valve cover 41 is provided with a plurality of inclined holes 47 arranged uniformly, the top of the traveling valve cover 41 is provided below with a first pressing block 43, the first pressing block 43 and the traveling valve cover 41 are provided between them with a spring 42, the first pressing block 43 and the traveling valve cover 41 are respectively provided with grooves capable of accommodating the spring 42, the first pressing block 43 is provided below with the first valve ball 44, the first valve ball 44 is provided below with a first valve seat 45, the first valve seat 45 is provided below with a compression joint 46, and the spring 42 is a cylindrical helical compression spring with a pre-tightening force of 7.5 N and a limit elastic force of 32.3 N, which can ensure the smooth opening under normal well fluid pressure in the downstroke and can ensure the smooth pushing of the first pressing block 43 and the first valve ball 44 by the spring in the upstroke, thereby ensuring the smooth closing of the elastic reset traveling valve 4. The influence of well inclination on the gravity reset of the valve ball is eliminated, and the elastic reset traveling valve 4 is suitable for use in inclined wells.
[0036] The mechanical forced reset floating valve 7 comprises a ball head rod 71, the outer periphery of the ball head rod 71 is provided with a rubber sealing seat 72, the lower end of the ball head rod 71 is connected with an oil inlet joint 73, the lower part of the ball head rod 71 is provided with a guide oil inlet column 8, the outer periphery of the guide oil inlet column 8 is provided with a plurality of oil inlet channels 81, the plurality of oil inlet channels 81 are spiral, and the guide oil inlet column 8 is in one-stage gap fit with the pump barrel 5. During the upstroke, since the guide oil inlet column 8 is in close fit with the pump barrel 5, frictional resistance exists, the guide oil inlet column 8 lags behind the movement of the plunger 6 when the plunger 6 goes up, and provides a downward pulling force for the ball head rod 71, forcibly closes the mechanical forced reset floating valve 7, makes the ball head at the upper end of the ball head rod 71 tightly fit with the rubber sealing seat 72, forms a sealed piston, reduces the pressure in the lower cavity of the oil well pump, and oil enters the pump barrel 5; during the downstroke, the guide oil inlet column 8 lags behind the movement of the plunger 6 due to the frictional resistance of the pump barrel 5, and applies an upward pushing force for the ball head rod 71, forcibly pushes the ball head at the upper end of the ball head rod 71 upward and away from the rubber sealing seat 72, opens the mechanical forced reset floating valve 7, and oil enters the upper part of the plunger 6. The frictional force between the guide oil inlet column 8 and the pump barrel 5 eliminates the influence of well deviation or gas on the opening and closing of the floating valve.
[0037] The elastic reset fixed valve 9 comprises a fixed valve cover 95, the lower part of the fixed valve cover 95 is provided with a second pressing block 92, the second pressing block 92 and the fixed valve cover 95 are provided with a reset spring 91 therebetween, the lower part of the second pressing block 92 is provided with a second valve ball 93, the lower part of the second valve ball 93 is provided with a second valve seat 94, and the lower part of the second valve seat 94 is provided with a fixed valve joint 96. The opening and reset closing principles of the elastic reset fixed valve 9 are the same as those of the elastic reset floating valve 4, and the elastic reset fixed valve 9 is suitable for use in inclined wells.
[0038] The above merely describes the preferred embodiments of the utility model and is not used to limit the utility model, and any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. A type of inclined well oil pump, characterized in that: The pump includes a pump barrel (5), a plunger (6) is provided inside the pump barrel (5), an elastic reset moving valve (4) is provided at the upper end of the plunger (6), a mechanical forced reset moving valve (7) is provided at the lower end of the plunger (6), an upper oil outlet connector (3) is provided above the elastic reset moving valve (4), and a universal joint assembly (1) is provided above the upper oil outlet connector (3).
2. The inclined well oil pump according to claim 1, characterized in that: The upper end of the pump cylinder (5) is provided with a first pump cylinder coupling (2), the lower end of the pump cylinder (5) is provided with a second pump cylinder coupling (10), and an elastic reset fixing valve (9) is provided below the second pump cylinder coupling (10).
3. The inclined well pumping unit according to claim 1, characterized in that: The universal joint assembly (1) includes a lower connector (14), which is connected to an upper oil outlet connector (3). A ball head seat (13) is provided above the lower connector (14). A universal ball head rod (12) is rotatably connected to the ball head seat (13). A ball head (15) is provided at the lower end of the universal ball head rod (12). The ball head (15) is embedded in the ball head seat (13) and rotatably connected to the ball head seat (13). The ball head (15) and the ball head seat (13) are clearance-fitted. An upper connector (11) is connected to the upper end of the universal ball head rod (12).
4. The inclined well oil pump according to claim 1, characterized in that: The elastic reset moving valve (4) includes a moving valve cover (41), and the top of the moving valve cover (41) is provided with a number of evenly arranged oblique holes (47).
5. A deviated well oil pump according to claim 4, characterized in that: A first pressure block (43) is provided below the top of the moving valve cover (41), and a spring (42) is provided between the first pressure block (43) and the moving valve cover (41).
6. A deviated well oil pump according to claim 5, characterized in that: A first valve ball (44) is provided below the first pressure block (43), a first valve seat (45) is provided below the first valve ball (44), and a clamping connector (46) is provided below the first valve seat (45).
7. A deviated well oil pump according to claim 1, characterized in that: The mechanical forced reset traveling valve (7) includes a ball head rod (71), a rubber sealing seat (72) is provided on the outer periphery of the ball head rod (71), an oil inlet connector (73) is connected to the lower end of the ball head rod (71), and a guide oil inlet column (8) is provided below the ball head rod (71).
8. A deviated well oil pump according to claim 7, characterized in that: The outer periphery of the guide oil inlet column (8) is provided with several oil inlet channels (81), and the several oil inlet channels (81) are spiral.
9. A deviated well oil pump according to claim 2, characterized in that: The elastic reset fixed valve (9) includes a fixed valve cover (95), a second pressure block (92) is provided below the fixed valve cover (95), a reset spring (91) is provided between the second pressure block (92) and the fixed valve cover (95), a second valve ball (93) is provided below the second pressure block (92), a second valve seat (94) is provided below the second valve ball (93), and a fixed valve connector (96) is provided below the second valve seat (94).
10. A deviated well oil pump according to claim 4, characterized in that: The inside of the moving valve cover (41) is provided with guide ribs (48).