Oil production method and device of high oil-gas ratio well

A technology of oil-gas ratio and oil-gas, which is applied in the direction of production fluid, earthwork drilling, wellbore/well components, etc., can solve problems such as failure to lift out, and achieve the effects of improving pump efficiency, improving liquid extraction efficiency, and wide adaptability
CN1912337AInactive Publication Date: 2007-02-14OIL EXTRACTION TECH INST OF SINOPEC SHENGLI OILFIELD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
OIL EXTRACTION TECH INST OF SINOPEC SHENGLI OILFIELD
Publication Date
2007-02-14
Estimated Expiration
Not applicable · inactive patent

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Abstract

An oil recovering method of high oil-gas ratio well includes setting oil submersible centrifugal pump and motor in the pit, setting at least one stage of oil-gas separation device on said pump for separating oil from gas, up warding free gas by annulus on oil jacket then venting it out by sleeve valve, entering degasified fluid into double annulus on said separation device to separate dissolved gas out by gravity and rotary centrifugal, down warding degasified fluid into liquid entrance and recovering it up to ground by said pump.
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Description

1. Technical field

[0001] The invention relates to a method and equipment for lifting oil and gas from a well, in particular to a method and a device for recovering oil from a well with a high oil-gas ratio. 2. Background technology

[0002] In the process of mechanical oil recovery in oilfields, the fluid entering the wellbore is mainly two-phase gas and oil or a three-phase mixture of gas, oil and water. Due to the existence of the gas phase, the gas has strong compressibility, which becomes the main factor affecting the lifting efficiency of the oil well pump. Two methods are commonly used to solve the above problems, that is, one is to increase the submergence of the pump; the other is to install a downhole gas separator. Chinese patent 962448664 discloses a "submersible electric pump air anchor device", which is a cylinder structure installed on the electric pump unit, and uses the difference in air density to separate gas and liquid. However, due to the structure, the...

Claims

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