John J. Pritchard Jr.

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Harvey, LA, US

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Patents Grantslast 30 patents

Information Patent Grant
Combination hydraulic tubing hanger and chemical injection sub
- Patent number 5,168,933
- Issue date Dec 8, 1992
- Shell Offshore Inc.
- John J. Pritchard
- E21 - EARTH DRILLING MINING
Information Patent Grant
Formation fluid sampler
- Patent number 4,690,216
- Issue date Sep 1, 1987
- Shell Offshore Inc.
- John J. Pritchard
- E21 - EARTH DRILLING MINING
Information Patent Grant
Abandoning offshore well
- Patent number 4,688,640
- Issue date Aug 25, 1987
- Shell Offshore Inc.
- John J. Pritchard
- E21 - EARTH DRILLING MINING
Information Patent Grant
Apparatus for perforating and producing a well
- Patent number 4,655,283
- Issue date Apr 7, 1987
- Shell Offshore Inc.
- John J. Pritchard
- E21 - EARTH DRILLING MINING