06691781 is referenced by 78 patents and cites 7 patents.

It is common in oil extraction operations to reinject produced gas and\or water back into hydrocarbon bearing formations in order to maintain formation pressure. Conventional production facilities normally flow all formation fluids to the surface and subsequently reinject the required fluids back into the formation, which can be extremely inefficient due to the high power input required to overcome the large pressure differential between the surface and formation level.

A production fluid handling method and apparatus for separating downhole at least gaseous and liquid components (

16, 18, 20

) of fluid produced from a hydrocarbon bearing formation (

12

), and reinjecting at least a portion of the gaseous and liquid components (

16, 18, 20

), as required, back into the formation (

12

). Re-injection also occurs downhole.

Title
Downhole gas/water separation and re-injection
Application Number
9/951596
Publication Number
6691781 (B2)
Application Date
September 13, 2001
Publication Date
February 17, 2004
Inventor
Terje Sondtvedt
Lysaker
US
Bjarne Olsen
Lysaker
US
Sven Arne Kjolberg
Porsgrunn
US
Per Eivind Gramme
Porsgrunn
US
Per Almdahl
Oslo
US
Alexander Angus Grant
Doune
US
Agent
Gifford Krass Groh Sprinkle Anderson & Citkowski P C
US
Assignee
Norsk Hydro ASA
US
Weir Pumps
US
IPC
E21B 43/49
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