Steven L. Schwegman

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Duncan, OK, US

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Patents Grantslast 30 patents

Information Patent Grant
Coiled tubing inflatable packer with circulating port
- Patent number 5,456,322
- Issue date Oct 10, 1995
- Halliburton Company
- James C. Tucker
- E21 - EARTH DRILLING MINING
Information Patent Grant
Positive circulating valve with retrievable standing valve
- Patent number 5,396,953
- Issue date Mar 14, 1995
- Halliburton Company
- Barry K. Holder
- E21 - EARTH DRILLING MINING
Information Patent Grant
Coiled tubing inflatable packer with circulating port
- Patent number 5,383,520
- Issue date Jan 24, 1995
- Halliburton Company
- James C. Tucker
- E21 - EARTH DRILLING MINING
Information Patent Grant
Jetting tool
- Patent number 5,029,644
- Issue date Jul 9, 1991
- Halliburton Company
- David D. Szarka
- E21 - EARTH DRILLING MINING
Information Patent Grant
Wash tool
- Patent number 4,991,653
- Issue date Feb 12, 1991
- Halliburton Company
- Steven L. Schwegman
- E21 - EARTH DRILLING MINING
Information Patent Grant
Well completions using casing valves
- Patent number 4,949,788
- Issue date Aug 21, 1990
- Halliburton Company
- David D. Szarka
- E21 - EARTH DRILLING MINING