1
Alexander Angus Grant, Per Almdahl, Per Eivind Gramme, Sven Arne Kjolberg, Bjarne Olsen, Terje Sondtvedt: Downhole gas/water separation and re-injection. Weir Pumps, Norsk Hydro ASA, Gifford Krass Groh Sprinkle Anderson & Citkowski P C, February 17, 2004: US06691781 (78 worldwide citation)

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 ba ...


2
Per Almdahl, Jeffrey Charles Edwards: Riser control device. Norsk Hydro ASA, Wenderoth Lind & Ponack L, June 24, 2008: US07389817 (16 worldwide citation)

A riser control device, particularly designed to be used in connection with spool or horizontal production trees (12) for wells in sub-sea oil and gas installations. Within a housing (1,2) of the device is provided, in opposed direction, radially movable pair of rams (6) for isolating (sealing off) ...


3
Per Almdahl, Bo Borrman, Lennart Gillander, Roland Larsson, John Evert Steger: Fixing means for a substantially cylindrical nuclear reactor pressure vessel with a vertical axis. Asea Atom, Pollock Vande Sande & Priddy, December 29, 1981: US04308101 (1 worldwide citation)

The present invention relates to an improved attachment assembly for clamping a nuclear reactor foot ring into engagement with a surrounding support wall while allowing for thermal expansion of the foot ring.


4
Per Almdahl, Jeffrey Charles Edwards: Riser control device. Wenderoth Lind & Ponack, March 10, 2005: US20050051339-A1

Riser control device, particularly designed to be used in connection with spool or horizontal production trees (12) for wells in sub-sea oil and gas installations. Within a housing (1,2) of the device is provided, in opposed direction, radially movable pair of rams (6) for isolating (sealing off) th ...


5
Alexander Angus Grant, Per Almdahl, Per Eivind Gramme, Sven Arne Kjolberg, Bjarne Olsen, Terje Sondtvedt: Downhole gas/water separation and re-injection. Gifford Krass Groh Sprinkle Anderson & Citkowski PC, May 23, 2002: US20020059866-A1

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 in ...



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