Petroline Wireline Services Limited

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Patents Grantslast 30 patents

Information Patent Grant
Self-piloting check valve
- Patent number 5,636,661
- Issue date Jun 10, 1997
- Petroline Wireline Services Limited
- Peter B. Moyes
- E21 - EARTH DRILLING MINING
Information Patent Grant
Lock mandrel for downhole assemblies
- Patent number 5,409,059
- Issue date Apr 25, 1995
- Petroline Wireline Services Limited
- Colin McHardy
- E21 - EARTH DRILLING MINING
Information Patent Grant
Upstroke jar
- Patent number 5,267,613
- Issue date Dec 7, 1993
- Petroline Wireline Services Limited
- Klaas J. Zwart
- E21 - EARTH DRILLING MINING
Information Patent Grant
Anti blow-out control apparatus
- Patent number 5,156,209
- Issue date Oct 20, 1992
- Petroline Wireline Services Ltd.
- Colin McHardy
- E21 - EARTH DRILLING MINING
Information Patent Grant
Quick-locking connector
- Patent number 5,052,849
- Issue date Oct 1, 1991
- Petroline Wireline Services, Ltd.
- Klaas Zwart
- E21 - EARTH DRILLING MINING
Information Patent Grant
Downhole lock assembly
- Patent number 4,883,121
- Issue date Nov 28, 1989
- Petroline Wireline Services Limited
- Klaas Zwart
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

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