Up-and-down anchor sealing gas-proof rod type oil pump

Abstract

The utility model relates to an upper-lifting and lower-landing anchor sealing gas-proof rod type oil well pump, relates to the technical field of oil well pump, including pump cylinder, the plunger assembly is arranged in the pump cylinder and lifts and falls, the lower end of plunger assembly is equipped with gas lock valve, the lower end of pump cylinder is fixedly connected with fixed valve, the lower end of fixed valve is fixedly connected with connecting pipe, the outer wall of connecting pipe is sleeved with the sealing rubber sleeve that expands along the radial direction, the connecting pipe is sleeved with the guide joint that sets up along the vertical sliding, and the upper end of guide joint is in contact with the lower end of sealing rubber sleeve. The utility model solves the problems that the oil well pump in traditional technology is prone to gas lock phenomenon when up and down stroke, which leads to less oil output or even no oil output, seriously affects the normal work of oil well, and the position of the oil well pump is not easy to fix during the lowering process of the existing oil well pump, and the sealing between the pump body and the oil pipe cannot be guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of oil pump technology, specifically to an oil pump with an upward and downward anchoring sealing anti-air rod. Background Technology

[0002] An oil pump is a downhole device that uses a sucker rod driven by a pumping unit to lift crude oil from the well to the surface. In the process of extracting crude oil from underground, it is generally necessary to use an oil pump.

[0003] Under normal circumstances, untreated underground crude oil contains many impurities and a lot of gas. So, during the process of using an oil pump to lift the crude oil from the well, a large amount of gas may enter the pump barrel.

[0004] A prior art patent, CN213808026U, discloses an anti-airlock device. The device includes a fixed ball valve with a fixed ball valve seat, which is fixed to the pump barrel. One end of the fixed ball valve seat is fixed to a fixed ball valve connector. The anti-airlock device comprises an outer tube and an inner tube, both with oil inlets and an outlet at the top of the outer tube. The outer and inner tubes are fixed to the fixed ball valve connector. This design effectively prevents gas from entering the pump barrel and causing airlock during crude oil extraction.

[0005] With use, existing devices, including those mentioned above, have gradually revealed shortcomings in this technology, mainly in the following aspects: First, existing oil pumps are prone to air lock during the up and down strokes, which can lead to low oil output or even no oil output, seriously affecting the normal operation of the oil well.

[0006] Secondly, during the lowering process, it is not easy to fix the position of the existing oil pump and it is impossible to guarantee the sealing between the pump body and the oil pipe.

[0007] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0008] In view of the shortcomings of the existing technology, this utility model solves the problems of air lock phenomenon in the oil pump during the up and down strokes of the traditional technology, which leads to low oil output or even no oil output, seriously affecting the normal operation of the oil well; and the problems of the existing oil pump not being easy to fix the position of the oil pump during the lowering process, and not being able to guarantee the sealing between the pump body and the oil pipe.

[0009] To solve the above problems, this utility model provides the following technical solution: An upward and downward anchoring sealed anti-air rod type oil pump includes a pump barrel, a plunger assembly that is raised and lowered inside the pump barrel, an anti-air lock valve at the lower end of the plunger assembly, a fixed valve fixedly connected to the lower end of the pump barrel, a connecting pipe fixedly connected to the lower end of the fixed valve, a radially expanding sealing rubber sleeve fitted on the outer wall of the connecting pipe, and a vertically sliding guide joint fitted on the connecting pipe, the upper end of the guide joint abutting against the lower end of the sealing rubber sleeve.

[0010] As an optimized solution, the area of ​​the connecting pipe below the guide joint is also slidably fitted with a support assembly.

[0011] As an optimized solution, the support assembly includes an upper positioning tube, a guide tube, and a lower positioning tube respectively fitted onto the connecting tube from top to bottom, and an outwardly protruding arc-shaped frame is fixed between the relative outer walls of the upper positioning tube and the lower positioning tube.

[0012] As an optimized solution, each of the arc-shaped frames has a straight rod section at its upper end, and an anchor claw is fixed to the upper end of the straight rod section. The outer wall of the anchor claw is provided with ridges that abut against the oil pipe.

[0013] As an optimized solution, the inner wall of the anchor claw is arranged in a gradually expanding manner from bottom to top, and the outer wall of the guide joint is arranged in a gradually expanding manner from bottom to top, with the inner wall of the anchor claw and the outer wall of the guide joint rubbing against each other.

[0014] As an optimized solution, a guide key is fixed to the inner wall of the guide tube, and a guide track groove is formed on the outer wall of the connecting tube, with the guide key slidably constrained within the guide track groove.

[0015] As an optimized solution, the anti-airlock valve includes a valve cover fixed to the lower end of the plunger assembly, and a pin is provided vertically inside the valve cover. When the pin moves to the upper limit position, it lifts the valve ball inside the plunger assembly.

[0016] As an optimized solution, a screen tube is fixedly connected to the lower end of the connecting pipe.

[0017] As an optimized solution, a retaining ring is fitted on the pipe wall below the guide joint of the connecting pipe, and the guide joint abuts against the retaining ring when it moves to the lower limit position.

[0018] As an optimized solution, the connecting pipe is also fixedly connected to a fixed cylinder located above the sealing rubber sleeve, with the upper end of the sealing rubber sleeve abutting against the lower end of the fixed cylinder.

[0019] Compared with the prior art, the beneficial effects of this utility model are: By connecting an anti-air lock valve to the lower end of the plunger assembly, the plunger moves upward under oil pressure, pushing the valve ball open to achieve the anti-air venting function and reduce air lock. By setting a sealing rubber sleeve, when the oil pump descends, the guide joint pushes upward under the action of the anchor claw, squeezing the sealing rubber sleeve. The compressed and deformed rubber sleeve protrudes until it contacts the inner wall of the oil pipe, thereby sealing the oil pipe. When the anchor claw is pushed outward by the guide joint to achieve the seated state, the anchor claw is pushed outward by the guide joint and uses the ridges to bite the inner wall of the oil pipe, thereby achieving the purpose of firm fixation. By utilizing the relatively set arc-shaped frame, the outwardly convex arc-shaped part in the middle of the support frame makes frictional contact with the inner wall of the oil pipe, thereby achieving fixation on the inner wall of the oil pipe. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. 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.

[0021] Figure 1 This is a schematic diagram of the structure of this utility model in its unsealed state; Figure 2 This is a schematic diagram of the structure of the seated sealing state limiting block of this utility model; Figure 3 This is a structural schematic diagram of the support assembly of this utility model; Figure 4 This is a schematic diagram of the guide rail groove of this utility model; Figure 5 This is a schematic diagram of the anti-airlock valve of this utility model in the closed state; Figure 6 This is a structural schematic diagram of the anti-airlock valve of this utility model in the open state.

[0022] In the diagram: 1-Pump barrel; 2-Plunger assembly; 3-Anti-airlock valve; 4-Fixed valve; 5-Connecting pipe; 6-Fixed cylinder; 7-Sealing rubber sleeve; 8-Guide joint; 9-Clip ring; 10-Oil pipe; 11-Straight rod section; 12-Upper positioning tube; 13-Guide tube; 14-Guide key; 15-Lower positioning tube; 16-Arc frame; 17-Anchor claw; 18-Guide track groove; 19-Valve cover; 20-Ejector pin; 21-Valve ball. Detailed Implementation

[0023] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0024] like Figures 1 to 6 As shown, the lifting and lowering anchoring sealing anti-air rod type oil pump includes a pump barrel 1, a plunger assembly 2 is provided inside the pump barrel 1, an anti-air lock valve 3 is provided at the lower end of the plunger assembly 2, a fixed valve 4 is fixedly connected to the lower end of the pump barrel, a connecting pipe 5 is fixedly connected to the lower end of the fixed valve 4, a sealing rubber sleeve 7 that expands radially is fitted on the outer wall of the connecting pipe 5, and a guide joint 8 that slides vertically is fitted on the connecting pipe 5, with the upper end of the guide joint 8 abutting against the lower end of the sealing rubber sleeve 7.

[0025] The area below the guide joint 8 of the connecting pipe 5 is also fitted with a support assembly.

[0026] The support assembly includes an upper positioning tube 12, a guide tube 13, and a lower positioning tube 15, which are respectively fitted onto the connecting tube 5 from top to bottom. An outwardly protruding arc-shaped frame 16 is fixed between the relative outer walls of the upper positioning tube 12 and the lower positioning tube 15.

[0027] Each arc-shaped frame 16 has a straight rod section 11 at its upper end, and an anchor claw 17 is fixedly connected to the upper end of the straight rod section 11. The outer wall of the anchor claw 17 has ridges that abut against the oil pipe 10.

[0028] The inner wall of the anchor claw 17 is gradually expanded from bottom to top, and the outer wall of the guide joint 8 is gradually expanded from bottom to top. The inner wall of the anchor claw 17 and the outer wall of the guide joint 8 rub against each other.

[0029] A guide key 14 is fixedly connected to the inner wall of the guide tube 13, and a guide rail groove 18 is opened on the outer wall of the connecting tube 5. The guide key 14 is slidably constrained in the guide rail groove 18.

[0030] The anti-airlock valve 3 includes a valve cover 19 fixed to the lower end of the plunger assembly 2. A pin 20 is also provided vertically inside the valve cover 19. When the pin 20 moves to the upper limit position, it lifts the valve ball 21 inside the plunger assembly 2.

[0031] A screen tube is fixed to the lower end of the connecting pipe 5.

[0032] A retaining ring 9 is fitted on the pipe wall of the connecting pipe 5 below the guide joint 8. When the guide joint 8 moves to the lower limit position, it abuts against the retaining ring 9.

[0033] The connecting pipe 5 is also fixedly connected to a fixed cylinder 6 located above the sealing rubber sleeve 7, with the upper end of the sealing rubber sleeve 7 abutting against the lower end of the fixed cylinder.

[0034] The sliding process between the guide key 14 and the guide rail groove 18 is as follows: (1) The anchor is installed at the lower end of the rod pump, at which point the guide key 14 is in the initial position at point A; (2) As the pump body is lowered into the oil pipe 10, due to the frictional contact between the outward convex arc of the support frame and the inner wall of the oil pipe 10, the rod column is lowered and pushes the plunger assembly 2 to the lower stroke limit point, and then pushes the pump barrel 1 assembly down to the predetermined pump hanging depth of the oil pump. At this time, the guide key 14 is located at point 18B of the short guide rail groove. (3) The rod is lifted up, which drives the plunger assembly 2 to the upper stroke limit point, and then drives the pump barrel 1 assembly to move upward, thereby driving the guide tube 13 to move upward. Since the support frame is in friction contact with the inner wall of the oil pipe 10, the support frame is fixed on the inner wall of the oil pipe 10 at this time. As the rod moves upward, the guide key 14 moves to point C along the guide track groove 18, and then moves to point D through the rotation direction of the guide sliding sleeve. The rod stops moving upward. (4) The rod is lowered to push the plunger assembly 2 to the lower stroke limit point, and then pushes the pump barrel 1 assembly downward, driving the guide tube 13 downward, so that the guide key 14 moves along the guide track groove 18 to point E, and then moves to point F and point H through the rotation direction of the guide sliding sleeve. When the guide key 14 moves to point H, the guide joint 8 moves upward with the rod and pushes the anchor claw 17 outward, so that the teeth of the anchor claw 17 bite the inner wall of the oil pipe 10 to achieve the purpose of firm anchoring. The sealing rubber sleeve 7 will be squeezed and deformed to bulge and contact the inner wall of the oil pipe 10 to seal, thereby achieving the sealing effect.

[0035] The working principle of this device is as follows: The anchor is installed at the lower end of the oil pump and is lowered into the oil pipe 10 along with the pump body. After reaching the predetermined position, the anchor support assembly is used for setting and sealing. The sealing rubber sleeve 7 is squeezed and deformed to seal the oil pipe 10, and the oil pump operates. The position of the oil pump can be selected and adjusted according to the dynamic fluid level. It features simple operation and firm anchoring. By connecting the anti-air lock valve 3 to the lower end of the plunger assembly 2, the ejector pin 20 moves upward under oil pressure, pushing open the valve ball 21 to achieve the anti-air venting function and reduce air lock. By setting the sealing rubber sleeve 7, when the oil pump descends, the guide joint 8 pushes upward under the action of the anchor claw 17, squeezing the sealing rubber sleeve 7. The compressed and deformed sleeve 7 protrudes and contacts the inner wall of the oil pipe 10, thereby sealing the oil pipe 10. When the anchor claw 17 is pushed outward by the guide joint 8 to achieve the seated state, the anchor claw 17 is pushed outward by the guide joint 8 and uses the ridges to bite the inner wall of the oil pipe 10, thereby achieving the purpose of firm fixation. By utilizing the relatively arranged arc-shaped frame 16, the outwardly convex arc-shaped part in the middle of the support frame makes frictional contact with the inner wall of the oil pipe 10, thereby achieving fixation on the inner wall of the oil pipe 10.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. Anchored, sealed, air-proof rod-type oil pump with lifting and lowering mechanism, characterized in that: The pump includes a pump barrel (1), a plunger assembly (2) is provided inside the pump barrel (1) and the lower end of the plunger assembly (2) is provided with an anti-airlock valve (3). A fixed valve (4) is fixedly connected to the lower end of the pump barrel (1). A connecting pipe (5) is fixedly connected to the lower end of the fixed valve (4). A sealing rubber sleeve (7) that expands radially is fitted on the outer wall of the connecting pipe (5). A guide joint (8) that slides vertically is fitted on the connecting pipe (5). The upper end of the guide joint (8) abuts against the lower end of the sealing rubber sleeve (7).

2. The lifting and lowering anchoring sealing anti-air rod type oil pump according to claim 1, characterized in that: The area of ​​the connecting pipe (5) below the guide joint (8) is also slidably fitted with a support assembly.

3. The lifting and lowering anchoring sealing anti-air rod type oil pump according to claim 2, characterized in that: The support assembly includes an upper positioning tube (12), a guide tube (13), and a lower positioning tube (15) respectively fitted onto the connecting tube (5) from top to bottom. An outwardly protruding arc-shaped frame (16) is fixed between the relative outer walls of the upper positioning tube (12) and the lower positioning tube (15).

4. The lifting and lowering anchoring sealing anti-air rod type oil pump according to claim 3, characterized in that: Each of the arc-shaped frames (16) has a straight rod section (11) at its upper end, and an anchor claw (17) is fixedly connected to the upper end of the straight rod section (11). The outer wall of the anchor claw (17) is provided with ridges that abut against the oil pipe (10).

5. The lifting and lowering anchoring sealing anti-air rod type oil pump according to claim 4, characterized in that: The inner wall of the anchor claw (17) is arranged in a gradually expanding manner from bottom to top, and the outer wall of the guide joint (8) is arranged in a gradually expanding manner from bottom to top. The inner wall of the anchor claw (17) and the outer wall of the guide joint (8) rub against each other.

6. The lifting and lowering anchoring sealing anti-air rod type oil pump according to claim 5, characterized in that: A guide key (14) is fixedly connected to the inner wall of the guide tube (13), and a guide track groove (18) is opened on the outer wall of the connecting tube (5). The guide key (14) is slidably constrained in the guide track groove (18).

7. The lifting and lowering anchoring sealing anti-air rod type oil pump according to claim 6, characterized in that: The anti-airlock valve (3) includes a valve cover (19) fixed to the lower end of the plunger assembly (2). The valve cover (19) is also provided with a pin (20) along the vertical direction. When the pin (20) moves to the upper limit position, it lifts the valve ball (21) inside the plunger assembly (2).

8. The lifting and lowering anchoring sealing anti-air rod type oil pump according to claim 7, characterized in that: A sieve tube is fixed to the lower end of the connecting pipe (5).

9. The lifting and lowering anchoring sealing anti-air rod type oil pump according to claim 8, characterized in that: The connecting pipe (5) is fitted with a retaining ring (9) on the pipe wall below the guide joint (8), and the guide joint (8) abuts against the retaining ring (9) when it moves to the lower limit position.

10. The lifting and lowering anchoring sealing anti-air rod type oil pump according to claim 9, characterized in that: The connecting pipe (5) is also fixedly connected to a fixed cylinder (6) located above the sealing rubber sleeve (7), with the upper end of the sealing rubber sleeve (7) abutting against the lower end of the fixed cylinder (6).

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