Inventor
RAMSEY ROBERT M
US3 patents
Patents
3 patentsUS6889771B1May 10, 2005
Selective direct and reverse circulation check valve mechanism for coiled tubing
SCHLUMBERGER TECHNOLOGY CORP91 citations96
US6808023B2Oct 26, 2004
Disconnect check valve mechanism for coiled tubing
SCHLUMBERGER TECHNOLOGY CORP91 citations96
US6959763B2Nov 1, 2005
Method and apparatus for integrated horizontal selective testing of wells
SCHLUMBERGER TECHNOLOGY CORP16 citations75