James HALL

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Cumbria, GB

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Patents Grantslast 30 patents

Information Patent Grant
Dual wiper plug system
- Patent number 9,200,499
- Issue date Dec 1, 2015
- Smith International, Inc.
- James Hall
- E21 - EARTH DRILLING MINING
Information Patent Grant
Retrievable cementing bushing system
- Patent number 9,062,520
- Issue date Jun 23, 2015
- Schlumberger Technology Corporation
- Derek Ingraham
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
RETRIEVABLE CEMENTING BUSHING SYSTEM
- Publication number 20130248180
- Publication date Sep 26, 2013
- SCHLUMBERGER TECHNOLOGY CORPORATION
- Derek Ingraham
- E21 - EARTH DRILLING MINING
Information Patent Application
DUAL WIPER PLUG SYSTEM
- Publication number 20120234561
- Publication date Sep 20, 2012
- Smith International, Inc.
- James HALL
- E21 - EARTH DRILLING MINING