CN2610117Y

CN2610117Y - Antiscale oil-well pump

Info

Publication number: CN2610117Y
Application number: CN 03239735
Authority: CN
Inventors: 岳明; 张明; 刘玉龙
Original assignee: Daqing Oilfield Co Ltd
Current assignee: Daqing Oilfield Co Ltd
Priority date: 2003-02-28
Filing date: 2003-02-28
Publication date: 2004-04-07
Anticipated expiration: 2013-02-28

Abstract

The utility model relates to a dirt perfection oil pump, which mainly solves the problem of oil extraction well being blocked caused by the extracted liquid incrustation. The utility model is characterized in that a pump bracket (1) is provided with a dirt scrabbling ring (6,2) between the inner plunger (3), 9 or 20 soft and hard distributed sealing ring (5,4) is also provided in the middle. The utility model is of dirt protecting and pumps block elimination function, where the added dirt cleaning structure will not influence the pump effect and lengthens service life of the oil extraction pump.

Description

Anti-scaling oil-well pump

Technical field:

The utility model relates to the used oil well pump in petroleum production engineering field, oil field, belongs to a kind of anti-scaling oil-well pump.

Background technique:

In oil production engineering, flowing well is a primary oil recovery, water flood recovery is a secondary oil recovery, injecting water other displacement of reservoir oil things in addition is tertiary oil recovery, Daqing oil field has entered since the tertiary oil recovery, because variation has taken place in the character of extraction liquid, polymer particularly, in aqueous slkali and the surface active agent ternary combination flooding produced liquid, high-alkalinity easily causes pumping well fouling holddown phenomenon, lifting equipment work efficient is reduced, rate shortens when effectively turning round, and has increased the extraction cost, has caused very big influence for production and test, especially after formally injecting the foam compound system in 97 years, have six mouthfuls of wells in ten mouthfuls of extraction wells and the inferior holddown phenomenon of 9 wells occurred, average pump detection period is 82 days, and rate 87.2% when on average turning round.

Practical fresh content:

In order to overcome the deficiency that extraction liquid fouling in the prior art causes the pumping well holddown, the utility model provides a kind of anti-scaling oil-well pump, this oil well pump has adopted clear antiscale structure, can effectively solve pumping well because the holddown phenomenon that fouling causes, the rate during running that improves pumping well prolongs pump detection period.

The technological scheme that the utility model adopted is: be equipped with wiper ring in the space between pump barrel and inner plunger up and down and middle 9,20 soft, as to be separated by firmly seal rings arranged.

The beneficial effects of the utility model are: because this oil well pump adopts wiper ring, soft, hard seal ring structure on plunger, have the characteristics of good antiscale property, elimination holddown phenomenon clearly, the clear anti-scaling function of increase can not influence pump efficiency, has prolonged the working life of oil well pump.

Description of drawings:

Fig. 1 is the utility model structure sectional view.

1-pump barrel among the figure, wiper ring under the 2-, 3-plunger, the hard seal ring of 4-, 5-soft seal ring, the last wiper ring of 6-, 7-sucker rod.

Embodiment:

The utility model is described in further detail below in conjunction with accompanying drawing:

Shown in Fig. 1, anti-scaling oil-well pump comprises pump barrel 1 and plunger 3, at the intrinsic upper and lower wiper ring (6 of the outer surface of pump barrel 1 inner plunger 3,2) and seal ring (5,4) soft, that be separated by firmly, wiper ring (6,2) be fixed on the two ends up and down of pump barrel 1 inner plunger 3, have certain elasticity, its outer surface surfacing nickel-base alloy and have spiral chute, when plunger 3 is reciprocating, can guarantee wiper ring (6,2) inwall of being close to pump barrel 1 scrapes up and down, and the dirt that scrapes off can be taken away by oily stream with spiral chute; Seal ring (5,4) can be soft seal ring and hard seal ring, soft seal ring 5 optimum efficiencies can be installed 9, hard seal ring 4 optimum efficiencies can be installed 20, in the middle of two hard seal rings 4, adorn a soft seal ring 5, soft seal ring 5 is copper powders that there is the teflon plating on the surface, and it and pump barrel 1 are nonmetal and a pair of friction pair metal, and be less scaling; Hard seal ring 4 can be two metal elastic-sealed rings, and the surface spraying weld nickel-base alloy radially has stria, guarantees that plunger 3 radially has certain decrement, after oil well pump stop pumping a period of time, opens that plunger 3 can not be stuck when taking out; Pump barrel 1 internal surface is the hard chromium plating layer, valve bonnet, ball seat all adopt special resistant material through precision optical machinery processing and strict heat treatment and process of surface treatment manufacturing, if therefore wiper ring (6 in use, 2) and soft, hard seal ring (5,4) diminishing the ring phenomenon can change separately when operation, needn't change a whole set of plunger 3.

In use, when sucker rod 7 drive plungers 1 pumped, wiper ring (6,2) cooperated soft, hard seal ring (5,4) to work, and makes oil well pump better finish the oil pumping task.This oil well pump has adopted clear antiscale structure, can effectively solve pumping well because the holddown phenomenon that causes of fouling, and rate during the running that improves pumping well prolongs pump detection period.

Claims

1, a kind of anti-scaling oil-well pump comprises pump barrel (1) and plunger (3), it is characterized in that: be equipped with wiper ring (6,2) in the space between pump barrel (1) and inner plunger (3) up and down and middle 9,20 soft, as to be separated by firmly seal rings (5,4) arranged.