John M. Sprott

Follow

Person

Spring, TX, US

People

Patents Grantslast 30 patents

Information Patent Grant
Borehole abandonment method using retrievable inflatable bridge plu...
- Patent number 9,458,693
- Issue date Oct 4, 2016
- Baker Hughes Incorporated
- Christopher R. Matthews-Ewald
- E21 - EARTH DRILLING MINING
Information Patent Grant
Ball drop circulation valve
- Patent number 7,661,478
- Issue date Feb 16, 2010
- Baker Hughes Incorporated
- Larry T. Palmer
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
Ball drop circulation valve
- Publication number 20080093080
- Publication date Apr 24, 2008
- Larry T. Palmer
- E21 - EARTH DRILLING MINING