Donna K. Pratt

Follow

Person

Fort Worth, TX, US

People

Patents Grantslast 30 patents

Information Patent Grant
Chemical cutting apparatus having selective pressure bleed-off
- Patent number 4,620,591
- Issue date Nov 4, 1986
- Gearhart Industries, Inc.
- Jamie B. Terrell
- E21 - EARTH DRILLING MINING
Information Patent Grant
Chemical cutting method and apparatus
- Patent number 4,619,318
- Issue date Oct 28, 1986
- Gearhart Industries, Inc.
- Jamie B. Terrell
- E21 - EARTH DRILLING MINING
Information Patent Grant
Downhole chemical cutting tool
- Patent number 4,494,601
- Issue date Jan 22, 1985
- Gearhart Industries, Inc.
- Donna K. Pratt
- E21 - EARTH DRILLING MINING
Information Patent Grant
Through tubing bridge plug
- Patent number 4,491,178
- Issue date Jan 1, 1985
- Gearhart Industries, Inc.
- Jamie B. Terrell
- E21 - EARTH DRILLING MINING
Information Patent Grant
Downhole well tool and anchoring assembly
- Patent number 4,415,029
- Issue date Nov 15, 1983
- Gearhart Industries, Inc.
- Donna K. Pratt
- E21 - EARTH DRILLING MINING