Douglas Derr

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Spring, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Rapid response well control assembly
- Patent number 11,136,857
- Issue date Oct 5, 2021
- Halliburton Energy Services, Inc.
- Carl Cramm
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
BALL VALVE CAPPING STACK
- Publication number 20210148192
- Publication date May 20, 2021
- Halliburton Energy Services, Inc.
- Guy R. Fox
- E21 - EARTH DRILLING MINING
Information Patent Application
RAPID RESPONSE WELL CONTROL ASSEMBLY
- Publication number 20210071499
- Publication date Mar 11, 2021
- Halliburton Energy Services, Inc.
- Carl Cramm
- E21 - EARTH DRILLING MINING