04900433 is referenced by 36 patents and cites 8 patents.

A vertical separator for separating crude oil into liquid and gas phases composed of an outer casing and two further sets of concentric tubing to enclose two annuli and a central passage, one annulus having an inlet to receive crude oil, the other annulus having an outlet for separated gas, each at the top of the separator. The central passage collects produced oil with a pump near its base and a pump drive pipe extending up it. The crude oil may flow down its annulus with a swirling motion which can be induced and assisted by a tangential inlet, and/or a cyclone at the top, and one or more helices in the annulus. The separator may be used for underwater wells and may extend partially or wholly into the sea bed with a protective cemented external casing around it.

Title
Vertical oil separator
Application Number
7/173332
Publication Number
4900433
Application Date
March 23, 1988
Publication Date
February 13, 1990
Inventor
Hans P Hopper
Whiterashes
GB
Alan J Dean
Skene
GB
Agent
Michael F Esposito
David J Untener
Larry W Evans
Assignee
The British Petroleum Company
GB
IPC
B01D 45/02
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