Inventor

DUFRENE KERBY J

US3 patents

Patents

3 patents

US7493959B2Feb 24, 2009

Joining tubular members

SCHLUMBERGER TECHNOLOGY CORP49 citations94

US6494256B1Dec 17, 2002

Apparatus and method for zonal isolation

SCHLUMBERGER TECHNOLOGY CORP27 citations85

US7866708B2Jan 11, 2011

Joining tubular members

SCHLUMBERGER TECHNOLOGY CORP13 citations82