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Gas operated pump for hydrocarbon wells
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Patent number 7,445,049
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Issue date Nov 4, 2008
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Weatherford/Lamb, Inc.
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William F. Howard
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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Double-acting reciprocating downhole pump
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Patent number 7,445,435
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Issue date Nov 4, 2008
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Weatherford/Lamb, Inc.
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William F. Howard
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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Gas operated pump for hydrocarbon wells
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Patent number 7,311,152
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Issue date Dec 25, 2007
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Weatherford/Lamb, Inc.
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William F. Howard
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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Gas operated pump for hydrocarbon wells
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Patent number 6,973,973
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Issue date Dec 13, 2005
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Weatherford/Lamb, Inc.
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William F. Howard
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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Submersible electric pump
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Patent number 6,926,504
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Issue date Aug 9, 2005
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Total Fiza Elf
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William F. Howard
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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Double-acting reciprocating downhole pump
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Patent number 6,817,409
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Issue date Nov 16, 2004
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Weatherford/Lamb, Inc.
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William F. Howard
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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