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Dennis Mitchel Spriggs
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Dallas, TX, US
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last 30 patents
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Patent Grant
Apparatus and method of well preparation for chemical treatment of...
Patent number
4,637,469
Issue date
Jan 20, 1987
Dresser Industries, Inc.
Dennis M. Spriggs
E21 - EARTH DRILLING MINING
Information
Patent Grant
Single string retrievable well packers
Patent number
4,151,876
Issue date
May 1, 1979
Dresser Industries, Inc.
Wayne S. Briggs
E21 - EARTH DRILLING MINING
Information
Patent Grant
Hydraulic holddown for well packer stinger
Patent number
4,056,145
Issue date
Nov 1, 1977
Dresser Industries, Inc.
Marion Barney Jett
E21 - EARTH DRILLING MINING
Information
Patent Grant
Locking device for use in well tubing
Patent number
3,963,074
Issue date
Jun 15, 1976
Dresser Industries, Inc.
Dennis Mitchel Spriggs
E21 - EARTH DRILLING MINING