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Roger P. Allwin
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Bryan, TX, US
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Patents Grants
last 30 patents
Information
Patent Grant
Liner hanger assembly
Patent number
5,181,570
Issue date
Jan 26, 1993
MWL Tool Company
Roger P. Allwin
E21 - EARTH DRILLING MINING
Information
Patent Grant
Finger nut setting tool and liner hanger assembly
Patent number
5,074,362
Issue date
Dec 24, 1991
Lindsey Completion Systems, Inc.
Roger P. Allwin
E21 - EARTH DRILLING MINING
Information
Patent Grant
Setting tool for a liner hanger assembly
Patent number
5,048,606
Issue date
Sep 17, 1991
Lindsey Completion Systems, Inc.
Roger P. Allwin
E21 - EARTH DRILLING MINING
Information
Patent Grant
Liner hanger with collapsible ball valve seat
Patent number
4,862,966
Issue date
Sep 5, 1989
Lindsey Completion Systems, Inc.
Hiram E. Lindsey
E21 - EARTH DRILLING MINING
Information
Patent Grant
Rotatable liner hanger
Patent number
4,848,462
Issue date
Jul 18, 1989
Lindsey Completion Systems, Inc.
Roger P. Allwin
E21 - EARTH DRILLING MINING
Information
Patent Grant
Liner hanger with retrievable ball valve seat
Patent number
4,828,037
Issue date
May 9, 1989
Lindsey Completion Systems, Inc.
Hiram E. Lindsey
E21 - EARTH DRILLING MINING
Information
Patent Grant
Liner hanger assembly with combination setting tool
Patent number
4,712,614
Issue date
Dec 15, 1987
Lindsey Completion Systems
Roger P. Allwin
E21 - EARTH DRILLING MINING
Information
Patent Grant
Setting tool for a well tool
Patent number
4,681,159
Issue date
Jul 21, 1987
MWL Tool Company
Roger P. Allwin
E21 - EARTH DRILLING MINING