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Petroleum Engineering Services, Ltd.
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Dyce, GB
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Patents Grants
last 30 patents
Information
Patent Grant
Downhole pressure activated device and a method
Patent number
6,321,847
Issue date
Nov 27, 2001
Petroleum Engineering Services Limited
Irvine Cardno Brown
E21 - EARTH DRILLING MINING
Information
Patent Grant
Packer
Patent number
5,904,207
Issue date
May 18, 1999
Petroleum Engineering Services Limited
Richard P. Rubbo
E21 - EARTH DRILLING MINING
Information
Patent Grant
Ball valves
Patent number
5,865,246
Issue date
Feb 2, 1999
Petroleum Engineering Services Limited
Irvine Cardno Brown
E21 - EARTH DRILLING MINING
Information
Patent Grant
Well safety system
Patent number
5,862,864
Issue date
Jan 26, 1999
Petroleum Engineering Services Limited
Drummond Wilkinson Whiteford
E21 - EARTH DRILLING MINING
Information
Patent Grant
Down-hole tools
Patent number
5,664,629
Issue date
Sep 9, 1997
Petroleum Engineering Services Limited
George Maitland
E21 - EARTH DRILLING MINING
Information
Patent Grant
Release/anti-preset mechanism for down-hole tools
Patent number
5,636,689
Issue date
Jun 10, 1997
Petroleum Engineering Services Ltd.
Richard P. Rubbo
E21 - EARTH DRILLING MINING
Information
Patent Grant
Well-head structures
Patent number
5,535,826
Issue date
Jul 16, 1996
Petroleum Engineering Services Limited
Stuart C. Brown
E21 - EARTH DRILLING MINING
Information
Patent Grant
Setting tool and related method
Patent number
5,447,202
Issue date
Sep 5, 1995
Petroleum Engineering Services, Ltd.
Sydney J. Littleford
E21 - EARTH DRILLING MINING
Information
Patent Grant
Bridge plug
Patent number
5,441,111
Issue date
Aug 15, 1995
Petroleum Engineering Services Limited
Drummond Whiteford
E21 - EARTH DRILLING MINING
Patents Applications
last 30 patents
Trademark
last 30 trademarks
Information
Trademark
75042130 - INLINE TREE
Serial number
75042130
Filing date
Jan 11, 1996
PETROLEUM ENGINEERING SERVICES LIMITED
7 - Machines and machine tools