Robert L. Jessup

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Duncan, OK, US

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Patents Grantslast 30 patents

Information Patent Grant
Surface packer and method for using the same
- Patent number 4,718,495
- Issue date Jan 12, 1988
- Halliburton Company
- Eric P. Lubitz
- E21 - EARTH DRILLING MINING
Information Patent Grant
Cementing tool with protective sleeve
- Patent number 4,246,968
- Issue date Jan 27, 1981
- Halliburton Company
- Robert L. Jessup
- E21 - EARTH DRILLING MINING
Information Patent Grant
Full-opening annulus pressure operated sampler valve with reverse c...
- Patent number 4,063,593
- Issue date Dec 20, 1977
- Halliburton Company
- Robert L. Jessup
- E21 - EARTH DRILLING MINING
Information Patent Grant
Method and apparatus for annulus pressure responsive circulation an...
- Patent number 4,044,829
- Issue date Aug 30, 1977
- Halliburton Company
- Robert L. Jessup
- E21 - EARTH DRILLING MINING
Information Patent Grant
Method and apparatus for annulus pressure responsive circulation an...
- Patent number 3,970,147
- Issue date Jul 20, 1976
- Halliburton Company
- Robert L. Jessup
- E21 - EARTH DRILLING MINING