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Sand preventing oil well pump

An oil pump and sand control technology, which is applied to pumps, pump components, variable displacement pump components, etc., can solve problems such as sand sticking and sand burial, prevent sand sticking and sand burial, overcome heavy oil resistance, and reduce opening and closing. lag effect

Pending Publication Date: 2019-04-05
CSIC ZHONGNAN EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main purpose of the present invention is to provide a sand control oil well pump, which solves the phenomenon of sand stuck and buried in the pump caused by sand particles often appearing in the exploitation of heavy oil.

Method used

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  • Sand preventing oil well pump
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  • Sand preventing oil well pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] like Figure 1~3 As shown, a sand control oil well pump is composed of a plunger assembly and a pump cylinder assembly. There is an elastic limit claw 11 inside the cylinder 12, and the grit chamber 12 is set on the outer wall of the short pump cylinder 14 to form a grit settling ring. The outer oil pipe 25 communicates, the plunger assembly is arranged inside the pump barrel, the middle part of the plunger assembly is provided with a short plunger 5, the short plunger 5 is arranged inside the long pump barrel 16, and the outer surface of the short plunger 5 is provided with An annular groove 21 for storing sand, an upper oil outlet valve 4 and a lower oil outlet valve 6 are arranged at both ends of the short plunger 5, and the top of the upper oil outlet valve 4 is connected with the pull rod 3, and the pull rod 3 is provided with a sand retaining ring 2, and the sand retaining ring 2 Set between the short pump barrel 14 and the grit chamber 12, the bottom of the lowe...

Embodiment 2

[0039] Further illustrate in conjunction with embodiment 1, as Figure 1~3As shown in the figure, when going into the well, the upper end of the pump barrel assembly is connected to the tubing, the lower end is connected to the liner pipe, and the tubing string is lowered into the oil well to the designed position, and then the upper end of the plunger assembly is connected to the sucker rod, and then connected to the pumping rod. The oil rod strings are lowered into the oil pipe together.

[0040] During the pumping operation, the plunger assembly, driven by the sucker rod, reciprocates up and down in the pump barrel assembly.

[0041] During the upward stroke, the plunger assembly moves upward, the upper and lower oil outlet valves are closed, the volume of the annular pump chamber of the upper pump increases, the pressure drops, and the oil inlet valve opens under the action of the submerged pressure and the friction between the plunger and the pump barrel , Crude oil ente...

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Abstract

The invention provides a sand preventing oil well pump which is composed of a plunger assembly and a pump cylinder assembly. A pull rod is connected with a short plunger. The short plunger is matchedwith a long pump cylinder in the pump cylinder assembly in a sliding and sealing manner. A sand storing ring-shaped groove is formed in the outer surface of the short plunger. A sand settling cylinderin the pump cylinder assembly is arranged on the outer wall of the short pump cylinder in a sleeving manner and forms a sand settling ring. An elastic limiting claw is arranged in the sand settling cylinder. The pump has the characteristics that the pumping efficiency is high, the sand preventing effect is good, the bearing ability is high, forward and reverse well washing and sand flushing of immovable pipe columns are achieved, and the oil well pump is applicable to exploitation of sand producing heavy oil wells.

Description

technical field [0001] The invention relates to a special feedback pumping thick pump used for pumping crude oil in sand producing heavy oil wells in oil fields. Background technique [0002] At present, there are many heavy oil wells in domestic oil fields with large sand content. After using sand control tools such as hanging sand control screens during production, a small amount of sand particles still enter the pump. When using ordinary feedback pumping thick pumps, sand particles often enter the pump. Sand stuck, sand buried phenomenon. Therefore, a thickening pump with sand control function must be used, but there are still many deficiencies in the existing thickening pump for sand control. Conventional thickening pumps for sand control usually improve the structural details of the parts on the plunger assembly on the basis of ordinary feedback thickening pumps. , such as using equal-diameter plungers or adding sand scraping rings, etc., the sand control effect is lim...

Claims

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Application Information

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IPC IPC(8): F04B47/00F04B53/10F04B53/16F04B53/12F04B53/14
CPCF04B47/00F04B47/005F04B53/1002F04B53/12F04B53/14F04B53/16
Inventor 徐士文刘建魁李进玉唐裔振张元圆许家勤
Owner CSIC ZHONGNAN EQUIP
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