Oil production and desanding method and apparatus

Details Oil production and desanding method and apparatus Oil production and desanding method and apparatus

1996-03-18

1997-09-02

Tsay, Frank

Wells

Processes

Separating material entering well

1661051, 1661055, E21B 4338

Patent

active

056621671

ABSTRACT:
A method and apparatus for desanding oil produced from a subterranean oil-bearing formation through a wellbore, the method comprising: flowing oil from the oil-bearing formation upwardly through a first tubing at a velocity sufficient to carry sand entrained in the oil upwardly through the first tubing; flowing the oil from the first tubing upwardly through a larger tubular section at a velocity sufficient to carry sand entrained in the oil upwardly to a perforated section positioned in a second tubing in the larger tubular section, the perforated section being positioned near the upper end of the larger tubular section; passing the oil through the perforated section and through a circumferential path around a dip tube positioned beneath the perforated section to centrifugally separate sand from the oil so that the sand is passed outwardly toward an inner diameter of the second tubing and downwardly to storage in a lower portion of the second tubing; and flowing the oil upwardly through the dip tube to a pump and through the pump and a third tubing to oil recovery at the surface.

REFERENCES:
patent: 1548803 (1925-08-01), Cotton
patent: 2104339 (1938-01-01), Arutunoff
patent: 2810352 (1957-10-01), Tumlison
patent: 4148735 (1979-04-01), Laval, Jr.
patent: 4407360 (1983-10-01), Hamrick
patent: 5295537 (1994-03-01), Trainer
patent: 5314018 (1994-05-01), Cobb

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