CN2616711Y

CN2616711Y - Sand-washing oil-well pump

Info

Publication number: CN2616711Y
Application number: CN 03232901
Authority: CN
Inventors: 罗绍东
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-01-16
Filing date: 2003-01-16
Publication date: 2004-05-19
Anticipated expiration: 2013-01-16

Abstract

The utility model relates to a sand-washing oil pump, comprising a pump barrel, a fixed ball check valve connected with the lower end of the pump barrel, a plunge positioned in the pump barrel, an oil pump connected with the plunge and composed of a walking ball check valve. The utility model is characterized in that the upper end of the pump barrel is connected with the valve body, a sliding sleeve positioned in the valve body, a seal ring arranged out of the sliding sleeve, a reset spring contacted with the lower end of the sliding sleeve, a bypass valve composed of a plurality of locating rings and connected with the top of the valve; a plurality of limbers are arranged at the middle-upper part of the valve body; the lower end of the fixed ball check valve of the oil pump is connected with a plurality of screen pipes; a plurality of sand clean out pipes are arranged out of the bypass valve, the oil pump and the sand clean out pipes. As a result, people can wash sand with the pump at any time, rather than wash using sand clean out pipe string without the oil pump, so process is reduced; labor intensity is reduced and oil mining cost is decreased.

Description

A kind of sand washing oil well pump

Technical field

The utility model relates to the equipment of petroleum production, is specifically related to a kind of sand washing oil well pump.

Technical background

In the petroleum production process since some pumping well crude oil to contain sand more, cause the oil well pump wearing and tearing to be accelerated, pump efficiency reduces gradually, shorten working life.Sand in oil well deposits to certain thickness, and oil well pump just can't be worked.In order to overcome the above problems, take at present to change oil well pump continually, and descend the sand washing tubing string in addition oil well sand washing, after sand washing finishes, trip out the sand washing tubing string, and then be lowered to the oil well pump oil pumping.So not only workload is quite big, and cost is very high.On March 11st, 1998 Decree of Patent Office of China patent No. be that ZL96228975, name are called " a kind of scouring sluice ".This valve comprises the sand setting tail pipe that is connected sand control card oil well pump bottom, is connected the scouring sluice that the sand setting tail pipe is made up of urceolus, sand block cap, standpipe, rib, shunting section header, Rectifier plate group, spool, guiding valve, seal, stage clip and regulating ring etc., utilizes its throttling action to make fluid dash acute and cleans the outer sand setting of standpipe.Can carry out the sand washing operation though can play pump, its structure is comparatively complicated.

Summary of the invention

The purpose of this utility model provides a kind of sand washing oil well pump, and it is simple in structure, uses reliably, when the oil well medium sand deposits to certain thickness, can be with pump sand washing at any time, and need not trip out oil well pump and running string sand washing in addition.

A kind of sand washing oil well pump described in the utility model, comprise by pump barrel, be connected the pump barrel lower end fixedly non-return valve, be contained in plunger in the pump barrel, oil well pump that the non-return valve that moves about that is connected with plunger is formed, it is characterized in that: be to be connected with by valve body in the upper end of pump barrel, be contained in sliding sleeve in the valve body, be contained in the sliding sleeve outside seal ring, with sliding sleeve under end in contact Returnning spring, be connected the bypass valve that the positioning ring on valve body top is formed, be provided with the water port in the middle and upper part of valve body; Fixedly be connected with screen casing in the lower end of non-return valve at oil well pump, outside bypass valve, oil well pump and screen casing, be with sand clean out pipe.Owing to be provided with bypass valve in the upper end of oil well pump and outside bypass valve, oil well pump and screen casing, be provided with sand clean out pipe, thereby can be with the pump sand washing at any time, and do not carry out sand washing and do not need to trip out other following sand washing tubing string of oil well pump, reduced operation, alleviate labor intensity, reduced cost of oil production.

Described a kind of sand washing oil well pump, its sand clean out pipe is formed by connecting by the above steel pipe of a joint.

Description of drawings

Fig. 1 is a structural drawing of the present utility model.

Fig. 2 is the A-A sectional view of Fig. 1.

Fig. 3 is the B-B sectional view of Fig. 1.

Fig. 4 is the C-C sectional view of Fig. 1.

Embodiment

Referring to Fig. 1, by pump barrel 1, be connected the pump barrel lower end fixedly non-return valve 2, be contained in plunger 3 in the pump barrel, the upper end of the pump barrel 1 of oil well pump that the non-return valve 4 that moves about that is connected with plunger is formed, connect by valve body 5, be contained in sliding sleeve 6 in the valve body, be contained in the sliding sleeve outside seal ring 7, with sliding sleeve under end in contact Returnning spring 8, be connected the bypass valve that the positioning ring 9 on valve body 5 tops is formed; Screen casing 11 is connected the lower end of the fixedly non-return valve 2 of oil well pump, sand clean out pipe 12 is enclosed within outside bypass valve, oil well pump and the screen casing 11, the upper end of sand clean out pipe 12 is connected with the top of bypass valve, and the upper end of pump rod is connected with sucker rod in the oil well.The upper end of the non-return valve 4 that moves about that the lower end of pump rod is connected with plunger 3 connects,

In the production process of oil well, because it is more to contain sand in the oil, when sand deposits to certain thickness, when influencing the oil well pump proper functioning, need stop oil pumping, sucker rod is transferred to the shaft bottom, the box cupling that connects pump rod and sucker rod is passed sliding sleeve 6 downwards, compression reseting spring 8, open the water port 10 of valve body 5 middle and upper parts of bypass valve, start the ground water pump and carry out sand washing, clear water is injected in the oil pipe, the high pressure clear water through the water port 10 and the annulus access of sand clean out pipe 12 and oil well pump penetrate and impact layer of sand, the high pressure clear water carries loose sand and returns out ground from the annulus access of oil pipe and oil well casing.

After sand washing finishes, be connected carrying on the sucker rod with pumping unit, sliding sleeve 6 moves up under the effect of Returnning spring 8, closes the water port 10 of valve body 5 middle and upper parts of bypass valve, can continue oil pumping.

Claims

1, a kind of sand washing oil well pump, comprise by pump barrel (1), be connected the pump barrel lower end fixedly non-return valve (2), be contained in plunger (3) in the pump barrel, oil well pump that the non-return valve that moves about (4) that is connected with plunger is formed, it is characterized in that: be to be connected with by valve body (5) in the upper end of pump barrel (1), be contained in sliding sleeve (6) in the valve body, be contained in the sliding sleeve outside seal ring (7), with sliding sleeve under end in contact Returnning spring (8), be connected the bypass valve that the positioning ring (9) on valve body (5) top is formed, be provided with water port (10) in the middle and upper part of valve body (5); Fixedly be connected with screen casing (11) in the lower end of non-return valve (2) at oil well pump, outside bypass valve, oil well pump and screen casing (11), be with sand clean out pipe (12).

2, a kind of sand washing oil well pump according to claim 1 is characterized in that sand clean out pipe (12) is formed by connecting by the above steel pipe of a joint.