Inventor
TRAN SONY
US4 patents
Patents
4 patentsUS6371221B1Apr 16, 2002
Coring bit motor and method for obtaining a material core sample
SCHLUMBERGER TECHNOLOGY CORP70 citations94
US6729416B2May 4, 2004
Method and apparatus for retaining a core sample within a coring tool
SCHLUMBERGER TECHNOLOGY CORP27 citations90
US6412575B1Jul 2, 2002
Coring bit and method for obtaining a material core sample
SCHLUMBERGER TECHNOLOGY CORP30 citations90
US7431107B2Oct 7, 2008
Coring bit with uncoupled sleeve
SCHLUMBERGER TECHNOLOGY CORP21 citations89