John Craig

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Forfar, GB

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Patents Grantslast 30 patents

Information Patent Grant
Wireline sealing assembly
- Patent number 11,041,356
- Issue date Jun 22, 2021
- National Oilwell Varco UK Limited
- John Ronald Hartley Craig
- E21 - EARTH DRILLING MINING
Information Patent Grant
Wireline pressure control apparatus
- Patent number 9,644,447
- Issue date May 9, 2017
- National Oilwell Varco UK Limited
- Carl Wood
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
WIRELINE SEALING ASSEMBLY
- Publication number 20200347691
- Publication date Nov 5, 2020
- National Oilwell Varco UK Limited
- John Ronald Hartley Craig
- E21 - EARTH DRILLING MINING
Information Patent Application
LOCKABLE SWIVEL APPARATUS
- Publication number 20150322735
- Publication date Nov 12, 2015
- National-Oilwell Varco, L.P.
- Scott Benjamin Randall
- E21 - EARTH DRILLING MINING
Information Patent Application
WIRELINE PRESSURE CONTROL APPARATUS
- Publication number 20140318814
- Publication date Oct 30, 2014
- Carl Wood
- E21 - EARTH DRILLING MINING