CN201218195Y

CN201218195Y - Anti-slag standing valve for oil pump

Info

Publication number: CN201218195Y
Application number: CNU200820024869XU
Authority: CN
Inventors: 吕新青; 吕云霏; 高淑清
Original assignee: RIZHAO YUANYE MACHINE MANUFACTURING Co Ltd
Current assignee: RIZHAO YUANYE MACHINE MANUFACTURING Co Ltd
Priority date: 2008-07-01
Filing date: 2008-07-01
Publication date: 2009-04-08
Anticipated expiration: 2018-07-01

Abstract

The utility model discloses a slag-prevention fixed valve of a defueling pump, which belongs to the field of oil extraction equipment in the oil field, which comprises a fixed valve housing. The slag-prevention fixed valve is characterized in that a slag-prevention housing lower joint and an external tube are arranged on the upper end of the fixed valve housing, wherein the upper end of the external tube is connected with a pump barrel of the defueling pump through a slag-prevention housing upper joint and a lower coupling of the pump barrel, an internal tube is arranged inside the external tube, the lower end of the internal tube is communicated with an oil outlet hole of the fixed valve, a slag-prevention cap is arranged on the upper end of the internal tube, and an oil outlet hole is arranged at the upper part of the internal tube. Compared with the prior art, the utility model has the advantages that various sundries, such as scale pieces, rust pieces, and the like can be successfully prevented from entering into fixed valve pairs, thereby the seal failure of the fixed valve caused by various sundries can be eliminated.

Description

Oil well pump is prevented the slag standing valve

Technical field

The utility model relates to a kind of oil field and recovers the oil with the standing valve of oil well pump lower end, especially a kind of anti-slag standing valve.

Background technique

At present, the basic structure of the standing valve assembly that install the oil well pump lower end is made up of 4 parts, be standing valve cover, fixed valve ball, fixed valve base and fixed valve base joint, what there was the use of the bar oil producing operation overwhelming majority in the oil field is tubing pump, the operation process of going into the well of tubing pump is: the standing valve assembly is installed in the pump barrel lower end, and pump barrel is installed in the oil pipe lower end, is lowered to precalculated position in the oil well with oil pipe.Plunger is installed in the sucker rod lower end, is lowered in the pump barrel by the oil pipe endoporus with sucker rod, in the process of advancing under plunger and sucker rod, can collide with tube inner wall inevitably, causes attached to residues such as the dirty sheet on the tube inner wall, rust sheets to come off.In addition, in sucker rod is gone into the well process, the ground well head opens wide, because of operation accidentally or natural wind sand also often have foreign material to fall into well, all these residue refuses all can be deposited on oil well pump standing valve vice division chief bottom, in oil pumping process, valve ball is done all the time and is risen and fall motion after rise, makes these residue junks have an opportunity attached pad at the sealed mouth place of valve ball and valve seat, cause the valve pair seal failure, can't pump, be forced to carry out pump detection and workover, lose huge.

The model utility content

Technical assignment of the present utility model is to provide a kind of oil well pump to prevent the slag standing valve at above-mentioned deficiency of the prior art.

The technological scheme that its technical problem that solves the utility model adopts is: oil well pump is prevented the slag standing valve, comprise standing valve cover, it is characterized in that being provided with anti-slag lower contact and outer tube in the upper end of described standing valve cover, described outer tube the upper end link to each other with the oil well pump pump barrel by box cupling under anti-slag cover upper connection and the pump barrel, its outer tube inside is provided with interior pipe, the lower end of pipe is connected with the standing valve oil outlet in described, and the upper end of pipe is provided with slag-proofing cap in described, and the top of described interior pipe is provided with oil outlet.

The utlity model has following outstanding beneficial effect:

1, can prevent effectively that the residue junk in ground and the oil pipe from falling into the standing valve pair, thereby avoid the secondary seal failure of the standing valve that causes thus.

2, improve operating efficiency, reduce the loss that causes because of the inspection pump.

3, simple to operate, safe and practical.

Description of drawings

Accompanying drawing is a structural representation of the present utility model

Embodiment

With reference to Figure of description the utility model is done following detailed description the in detail

As shown in the figure, the utility model comprises slag-proofing cap upper connection 1, outer tube 2, slag-proofing cap 3, interior pipe 4, anti-slag cover lower contact 5, standing valve cover 6, fixed valve ball 7, fixed valve base 8 and fixed valve base joint 9.Be provided with oil outlet 10 on the top of interior pipe 4, its outer tube 2 upper ends link to each other with the pump barrel of oil well pump by the following box cupling of anti-slag upper connection 1 and pump barrel, outer tube 2 lower ends link to each other with standing valve cover 6 by slag-proofing cap lower contact 5, fixed valve base 8 is housed in the said fixing valve bonnet 6, fixed valve ball 7 is arranged on the fixed valve base 8, and fixed valve base 8 is fixed on the top of fixed valve base joint 9 by standing valve cover 6.

When descending well operations; anti-slag standing valve and pump barrel are lowered to precalculated position in the oil well in company with oil pipe together; in the process of going into the well of plunger and sucker rod; the foreign material of being dropped into accidentally by well head when residue in the oil pipe and operation can be deposited in the gap of outer tube 2 and interior pipe 4; because of the protection of slag-proofing cap 3 is arranged; these residue junks can not enter within the standing valve pair; so just avoided the attached pad of slag thing between fixed valve ball 7 and fixed valve base 8 and the valve that causes secondary seal failure possible fully; stopped the pump detection and workover that takes place therefrom; reduce corresponding economic loss, improved the economic benefit of recovering the oil and producing.

During oil pumping, the crude oil of pipe 4 in the oil outlet by standing valve cover 6 enters in the annular space of pipe 4 and outer tube 2, enters the following pump chamber of oil well pump in entering through the oil outlet 10 on interior pipe 4 tops again by the oil outlet of anti-slag cover upper connection 1.

The anti-slag standing valve of oil well pump of the present utility model is simple in structure, easy to operate, and production operation gets final product shown in the by specification accompanying drawing.

Except that technical characteristics shown in the specification, all the other are the known technology of those skilled in the art.

Claims

Oil well pump is prevented the slag standing valve, comprise standing valve cover, it is characterized in that being provided with anti-slag cover lower contact and outer tube in the upper end of described standing valve cover, the upper end of described outer tube links to each other with the oil well pump pump barrel by box cupling under anti-slag cover upper connection and the pump barrel, its outer tube inside is provided with interior pipe, the lower end of pipe is connected with the standing valve oil outlet in described, and the upper end of pipe is provided with slag-proofing cap in described, and the top of described interior pipe is provided with oil outlet.