Petrochina Company Limited

Daqing Oilfield Company Limited

Daqing Oilfield Co. Lit

Rong Zhong

Demin Wang

Yan Wang

Quan Liu

Rongjie Zhu

Jintang Liu

Long Ren

Hongyan Wang

A downhole oil, gas, water and sand separation method and separator (). The downhole oil, gas, water and sand separation method comprises: step: dividing an oil jacket annulus into a plurality of spaces in an outflow direction of produced liquid, wherein each space is provided with an accommodating cavity () communicated with the oil jacket annulus; step: arranging a plurality of liquid inlet hole groups () in a liquid outlet pipeline () of the produced liquid in the outflow direction of the produced liquid, wherein each of the liquid inlet hole groups () is communicated with one of the accommodating cavities (); and step: separating oil, gas and water after the crude oil in the oil jacket annulus flows into each of the accommodating cavities (), wherein separated oil drops or bubbles flow back to the oil jacket annulus from the accommodating cavities (), and separated produced liquid simultaneously flows into the liquid outlet pipeline () through the plurality of liquid inlet hole groups (). The downhole oil, gas, water and sand separation method and separator can realize a rapid downhole oil-water or gas-water separation in the high water-content crude oil.

Downhole oil, gas, water and sand separation method and separator

The present invention relates to a crown-shaped separation device for separating oil and water in a well. Separator joints are sleeved on a central tube, and a separator is arranged between adjacent separator joints. Settlement cups are sleeved on the central tube, and two adjacent settlement cups are inserted together. A multi-rib separating bowl is embedded in the settlement cup. The settlement cup is crown shape. The bottom of the settlement cup is formed with multiple ribs. An angle is formed between the convex rib of the bottom of the settlement cup and the horizontal line. The top edge of the settlement cup is sawtooth shape corresponding to the shape of the cup bottom. An annular space is formed between the cup base of the settlement cup and the central tube. The central tube corresponding to the annular space is provided with a fluid inlet. The shape of the multi-rib separating bowl is identical to that of the bottom of settlement cup, and the multi-rib separating bowl is provided with a fluid passage. The downhole device solves the effective separation of oil and water.

Crown-shaped separation device for separating oil and water in well

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Beijing, China

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