Air-proof and sand-proof hollow rod pump

Abstract

The utility model relates to a gas and sand prevention hollow rod pump, which belongs to the technical field of oil field oil exploitation and comprises a pump cylinder assembly, a hollow rod assembly, a plunger assembly and a standing valve assembly, the hollow rod assembly and the plunger assembly are arranged in the pump cylinder assembly, and a sand outlet joint is connected between the hollow rod assembly and the plunger assembly. The upper end of the hollow rod assembly is connected with a connecting-tripping device, the connecting-tripping device comprises a locking claw and a locking sleeve, the locking claw and the locking sleeve are connected in an inserted mode, the condition of treating medium sand and above sand can be achieved, meanwhile, the problem of medium air locking is solved, and the mining efficiency and safety of the pump are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to oilfield petroleum exploitation technical field, concretely is a kind of anti-gas and sand hollow rod pump. BACKGROUND

[0002] In the process of oilfield petroleum exploitation, sand production of oil well is a common problem. After sand enters the oil pump, it can cause the pump to wear out, even cause pump jam, stop pumping and other failures, resulting in shorter pump inspection cycle, and seriously affect the production efficiency of oil well and equipment life.

[0003] With the increase of oil well production degree, the formation pressure of sand production oil well drops, and a large part of the dissolved gas in crude oil is precipitated prematurely. The gas oil ratio of the sand production oil well itself is high, and the gas enters the oil pump, which can fill the pump cavity volume, reduce the entry of crude oil and reduce the pump efficiency. In severe cases, it can also cause gas lock of the oil pump.

[0004] Especially in those oilfields with high sand content or harsh working environment, the traditional oil pump is often damaged by sand invasion, and the appearance of gas lock leads to reduced pump efficiency. SUMMARY

[0005] The utility model discloses a kind of anti-gas and sand hollow rod pump, reduce the emergence of sand jamming pump, gas lock and the like, improve the exploitation efficiency of oilfield.

[0006] The utility model discloses a kind of anti-gas and sand hollow rod pump, including pump barrel assembly, hollow rod assembly, plunger assembly and fixed valve assembly, hollow rod assembly and plunger assembly are set in pump barrel assembly, and sand outlet joint is connected between hollow rod assembly and plunger assembly, the upper end of hollow rod assembly is connected with disconnector, and the disconnector includes lock jaw and lock sleeve, and lock jaw and lock sleeve are inserted.

[0007] As a further improvement of the above technical solution:

[0008] The upper end of the lock sleeve is provided with a first groove, a clamping head is inserted into the bottom center of the first groove, a clamping seat is provided on the clamping head, the clamping seat is arranged at the bottom of the first groove, and the clamping seat is connected with a plug.

[0009] The lower end of the lock sleeve is provided with a second groove, the clamping head passes through the second groove, a nut is provided on the clamping head, and a spring is provided on the clamping head between the second groove and the nut.

[0010] The hollow rod assembly includes a hollow rod body, an upstream valve seat is arranged at the front end of the hollow rod body, an upstream valve ball is arranged on the upstream valve seat, an oil outlet joint is connected to the upper end of the hollow rod body, and the oil outlet joint is connected with the disconnector.

[0011] The lower end of the hollow rod body is connected with a sand outlet joint, and four inclined holes are uniformly arranged on the sand outlet joint in the circumferential direction.

[0012] The plunger assembly comprises a plunger body connected with the sand outlet joint, a downstream movable valve cover arranged below the plunger body, a valve seat plug arranged below the downstream movable valve cover, a downstream movable valve seat arranged on the valve seat plug, and a downstream movable valve ball arranged on the downstream movable valve seat.

[0013] The pump cylinder assembly comprises an upper pump cylinder and a lower pump cylinder, and a pump cylinder coupling joint is arranged between the upper pump cylinder and the lower pump cylinder.

[0014] An annular protrusion is arranged in the inner center of the pump cylinder coupling joint, and guide ribs are arranged on the annular protrusion at intervals.

[0015] A first pump cylinder coupling is connected to the upper end of the upper pump cylinder, a second pump cylinder coupling is connected to the lower end of the lower pump cylinder, and a fixed valve assembly is connected to the lower end of the second pump cylinder coupling.

[0016] The fixed valve assembly comprises a fixed valve cover, eight holes are uniformly arranged on the fixed valve cover, a fixed valve ball is arranged below the fixed valve cover, a fixed valve seat is arranged below the fixed valve ball, the fixed valve assembly is arranged at the lower end of the pump cylinder assembly, and a lower joint is connected to the lower end of the fixed valve assembly.

[0017] Compared with the prior art, the utility model has the advantages that the utility model not only has the condition of processing the sand with medium and above, but also solves the gas lock condition up to medium, and improves the mining efficiency and safety of the pump.

[0018] Most pumps are designed for one condition, either processing gas conditions or only used when encountering sand and abrasive particles. The utility model effectively solves these two problems, and improves the compression ratio of the pump due to the two-stage compression technology, which enables the pump to process gas well conditions and also enables the sand to be in a suspended state and removed from the pump, thereby helping to prolong the service life of the pump.

[0019] The utility model will be further described below in combination with the drawings and specific embodiments. DRAWINGS

[0020] Figure 1 It is a structure schematic view of a kind of anti-gas anti-sand hollow rod pump in the embodiment of the utility model;

[0021] Figure 2 It is a structure schematic view of a disconnector in the embodiment of the utility model;

[0022] Figure 3 It is a structure schematic view of pump cylinder coupling joint in the embodiment of the utility model;

[0023] Figure 4 It isFigure 1 Structure diagram of the coupling joint A-A of the middle pump barrel.

[0024] In the figure, 1 - first pump barrel coupling; 2 - upper pump barrel; 3 - pump barrel coupling joint; 4 - lower pump barrel; 5 - oil outlet joint; 6 - upper movable valve ball; 7 - upper movable valve seat; 8 - hollow rod body; 9 - sand outlet joint; 10 - plunger body; 11 - lower movable valve cover; 12 - lower movable valve ball; 13 - lower movable valve seat; 14 - valve seat pipe plug; 15 - fixed valve cover; 16 - fixed valve ball; 17 - fixed valve seat; 18 - lower joint; 19 - disconnector, 191 - locking claw; 192 - locking sleeve; 193 - spring; 194 - nut; 195 - clamp, 20 - second pump barrel coupling, 21 - annular protrusion, 22 - guide rib, 24 - inclined hole, 25 - hole. DETAILED DESCRIPTION

[0025] 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.

[0026] 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" and the like 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.

[0027] 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 as "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

[0028] As Figures 1-4As shown, a kind of anti-gas and sand hollow rod pump, including pump barrel assembly, hollow rod assembly, plunger assembly and fixed valve assembly, hollow rod assembly and plunger assembly are arranged in pump barrel assembly, and the sand outlet joint 9 is connected between hollow rod assembly and plunger assembly, the upper end of hollow rod assembly is connected with the disconnector 19, and the fixed valve assembly is arranged in the lower end of pump barrel assembly, and the lower end of fixed valve assembly is connected with the lower joint 18.

[0029] Hollow rod assembly includes hollow rod body 8, the front end of hollow rod body 8 is equipped with upstream movable valve seat 7, upstream movable valve seat 7 is equipped with upstream movable valve ball 6, the upper end of hollow rod body 8 is connected with oil outlet joint 5, oil outlet joint 5 is connected with disconnector 19, the lower end of hollow rod body 8 is connected with sand outlet joint 9, and four inclined holes 24 are evenly arranged on sand outlet joint 9 in the circumferential direction, inclined hole 24 is inclined inwards and downwards, the inclination angle of inclined hole 24 is 45 °, allows sand and particulate to flow, and plays the role of filtering sand.

[0030] Hollow rod body 8 replaces solid rod body, when stressed, stress can be dispersed, and stress concentration is reduced.

[0031] The disconnector 19 includes lock jaw 191 and lock sleeve 192, the upper end of lock sleeve 192 is equipped with first recess 196, the bottom center of first recess 196 is inserted with clamping head 195, clamping head 195 is equipped with clamping seat 197, clamping seat 197 is arranged at the bottom of first recess 196, clamping seat 197 is connected with plug 198, lock jaw 191 and lock sleeve 192 are inserted, when lock jaw 191 is inserted into lock sleeve 192, plug 198 is inserted into lock jaw 191, the lower end of lock sleeve 192 is equipped with second recess 199, clamping head 195 passes through second recess 199, clamping head 195 is equipped with nut 194, and spring 193 is arranged on clamping head 195 between second recess 199 and nut 194.

[0032] When installation, the clamping head 195 of disconnector 19 is connected with oil outlet joint 5, lock sleeve 192, spring 193, nut 194 and clamping head 195 are lowered into well along with hollow rod assembly, lock jaw 191 is connected with sucker rod, and is lowered into well along with sucker rod, when lock jaw 191 is contacted with lock sleeve 192 after being lowered into pump barrel assembly, at this time, continue to lower the sucker rod, and make the lock jaw 191 of disconnector 19 and lock sleeve 192 be connected by the gravity of sucker rod, to complete installation.

[0033] Plunger assembly includes plunger body 10, plunger body 10 is connected with sand outlet joint 9, the lower portion of plunger body 10 is equipped with downstream movable valve cover 11, the lower portion of downstream movable valve cover 11 is equipped with valve seat pipe plug 14, valve seat pipe plug 14 is equipped with downstream movable valve seat 13, downstream movable valve seat 13 is equipped with downstream movable valve ball 12.

[0034] The pump cylinder assembly comprises an upper pump cylinder 2 and a lower pump cylinder 4, a pump cylinder coupling head 3 is arranged between the upper pump cylinder 2 and the lower pump cylinder 4, an annular protrusion 21 is arranged in the inner center of the pump cylinder coupling head 3, guide ribs 22 are arranged on the annular protrusion 21 at intervals, and a hollow rod body 8 is left with sufficient gaps, so that sand and other particles can be flushed out of the upper compression chamber through the gaps, thereby purifying the upper chamber, and the guide ribs play a centralizing role on the hollow rod body 8.

[0035] A first pump cylinder coupling head 1 is connected to the upper end of the upper pump cylinder 2, a second pump cylinder coupling head 20 is connected to the lower end of the lower pump cylinder 4, and the lower end of the second pump cylinder coupling head 20 is connected with a fixed valve assembly.

[0036] The fixed valve assembly comprises a fixed valve cover 15, eight holes 25 are uniformly arranged on the fixed valve cover 15, a fixed valve ball 16 is arranged below the fixed valve cover 15, a fixed valve seat 17 is arranged below the fixed valve ball 16, and a lower connector 18 is arranged below the fixed valve seat 17.

[0037] The sizes of the upper movable valve ball 6 and the upper movable valve seat 7 are smaller than those of the lower movable valve ball 12 and the lower movable valve seat 13, the opening and closing states of the upper movable valve ball 6 and the fixed valve ball 16 are consistent, and the opening and closing states of the lower movable valve ball 12 are just the opposite.

[0038] In use, in the downstroke, the fixed valve ball 16 is closed, the upper movable valve ball 6 is closed, and the lower movable valve ball 12 is allowed to open, without the need to compress the fluid / gas mixture to high pressure. As the downstroke continues, the upper compression chamber is emptied, and the fluid / gas mixture from the lower main compression chamber moves through and above the plunger assembly to the upper compression chamber.

[0039] At the beginning of the upstroke, the lower movable valve ball 12 is closed, and the fixed valve ball 16 is opened to allow new fluid to enter the lower compression chamber. During the upstroke, the fluid / gas mixture in the upper compression chamber is compressed to a higher pressure until the upper movable valve ball 6 opens and allows the fluid to be discharged into the pipe above the pump, thereby completing the pumping cycle. The connection mode and closing of the valve balls, in combination with the design of the hollow rod body 8, enhances the compression ratio of the pump, can effectively handle high to moderate air lock conditions, and can effectively move sand to a moderate degree or above without sticking.

[0040] The above only describes the preferred embodiments of the utility model, and does not limit the utility model, and any modification, equivalent replacement and improvement made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An air and sand control hollow rod pump characterized by: The pump barrel assembly, the hollow rod assembly, the plunger assembly and the fixed valve assembly, the hollow rod assembly and the plunger assembly are arranged in the pump barrel assembly, the sand outlet joint (9) is connected between the hollow rod assembly and the plunger assembly, the upper end of the hollow rod assembly is connected with the disconnector (19), the disconnector (19) comprises a locking jaw (191) and a locking sleeve (192), and the locking jaw (191) and the locking sleeve (192) are inserted.

2. The anti-gas and anti-sand hollow rod pump of claim 1, wherein: The upper end of the locking sleeve (192) is provided with a first groove (196), the bottom center of the first groove (196) is inserted with a clamping head (195), the clamping head (195) is provided with a clamping seat (197), the clamping seat (197) is arranged at the bottom of the first groove (196), and the clamping seat (197) is connected with a plug (198).

3. The anti-gas and anti-sand hollow rod pump of claim 2, wherein: The lower end of the locking sleeve (192) is provided with a second groove (199), the clamping head (195) passes through the second groove (199), the clamping head (195) is provided with a nut (194), and the spring (193) is arranged on the clamping head (195) between the second groove (199) and the nut (194).

4. The anti-gas and anti-sand hollow rod pump of claim 1, wherein: The hollow rod assembly comprises a hollow rod body (8), the upstream movable valve seat (7) is arranged at the front end of the hollow rod body (8), the upstream movable valve ball (6) is arranged on the upstream movable valve seat (7), the oil outlet joint (5) is connected with the disconnector (19), and the oil outlet joint (5) is connected with the disconnector (19).

5. The gas and sand proof hollow rod pump according to claim 4, characterized in that: The lower end of the hollow rod body (8) is connected with the sand outlet joint (9), and four inclined holes (24) are uniformly arranged on the sand outlet joint (9) in the circumferential direction.

6. The gas and sand control hollow rod pump of claim 5, wherein: The plunger assembly comprises a plunger body (10), the plunger body (10) is connected with the sand outlet joint (9), the downstream movable valve cover (11) is arranged below the plunger body (10), the valve seat pipe plug (14) is arranged below the downstream movable valve cover (11), the downstream movable valve seat (13) is arranged on the valve seat pipe plug (14), and the downstream movable valve ball (12) is arranged on the downstream movable valve seat (13).

7. The gas and sand proof hollow rod pump of claim 1, wherein: The pump barrel assembly comprises an upper pump barrel (2) and a lower pump barrel (4), and the pump barrel connecting joint (3) is arranged between the upper pump barrel (2) and the lower pump barrel (4).

8. The gas and sand control hollow rod pump of claim 7, wherein: The inner center of the pump barrel connecting joint (3) is provided with an annular protrusion (21), and the guide ribs (22) are arranged at intervals on the annular protrusion (21).

9. The gas and sand control hollow rod pump of claim 7, wherein: The upper end of the upper pump barrel (2) is connected with the first pump barrel coupling (1), the lower end of the lower pump barrel (4) is connected with the second pump barrel coupling (20), and the lower end of the second pump barrel coupling (20) is connected with the fixed valve assembly.

10. The gas and sand control hollow rod pump of claim 9, wherein: The fixed valve assembly comprises a fixed valve cover (15), eight holes (25) are uniformly arranged on the fixed valve cover (15), the fixed valve ball (16) is arranged below the fixed valve cover (15), the fixed valve seat (17) is arranged below the fixed valve ball (16), the fixed valve assembly is arranged at the lower end of the pump barrel assembly, and the lower end of the fixed valve assembly is connected with the lower joint (18).

Images