05343945 is referenced by 29 patents and cites 11 patents.

Oil and gas are separated downhole in a free flowing well and are transmitted separately to the surface. Liquid oil is transmitted through an elongated tubing which extends into a liquid column in the bottom of the well and is anchored in a liquid production tubing string to form an annular flow space. Gas flows from a wellbore space above the column of liquid through the annular space and through a flow passage which may be formed by a side pocket mandrel into the well annulus and then to the surface. The liquid conducting tubing is secured in the tubing string and a seal point is formed by a packer above the gas flow passage formed by the side pocket mandrel. Alternative arrangements provide for a subsurface gas flow safety valve interposed in the gas flow path. The safety valve may be interposed in a cross-over body which permits flow of liquid and gas therethrough and past a seal formed between the body and the tubing string.

Title
Downholde gas/oil separation systems for wells
Application Number
8/20524
Publication Number
5343945
Application Date
February 19, 1993
Publication Date
September 6, 1994
Inventor
Jeffrey L Harris
Eagle River
AK, US
M Jane Williamson
Anchorage
AK, US
Jean S Weingarten
Anchorage
AK, US
Agent
Michael E Martin
Assignee
Atlantic Richfield Company
CA, US
IPC
E21B 43/12
View Original Source