Inventor
CARMICHAEL MARK
GB18 patents
⚠️ This page may combine multiple inventors who share the name “CARMICHAEL MARK”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SPECIALISED PETROLEUM SERV LTD
12 patentsUS6253861B1Jul 3, 2001
Circulation tool
SPECIALISED PETROLEUM SERV LTD337 citations99
US6220357B1Apr 24, 2001
Downhole flow control tool
SPECIALISED PETROLEUM SERV LTD197 citations99
US6227291B1May 8, 2001
Compact well clean up tool with multifunction cleaning apparatus
SPECIALISED PETROLEUM SERV LTD60 citations96
US6152220ANov 28, 2000
Down-hole tool with centralising component
SPECIALISED PETROLEUM SERV LTD64 citations96
US6152221ANov 28, 2000
Apparatus with retractable cleaning members
SPECIALISED PETROLEUM SERV LTD84 citations96
US6102060AAug 15, 2000
Detachable locking device for a control valve and method
SPECIALISED PETROLEUM SERV LTD70 citations96
US6497295B1Dec 24, 2002
Torque limiting tool
SPECIALISED PETROLEUM SERV LTD21 citations92
US6343648B1Feb 5, 2002
Down-hole tool with detachable cleaning pads
SPECIALISED PETROLEUM SERV LTD23 citations92
US6302214B1Oct 16, 2001
Apparatus and method for inflating packers in a drilling well
SPECIALISED PETROLEUM SERV LTD27 citations92
US6279657B1Aug 28, 2001
Apparatus and method for circulating fluid in a well bore
SPECIALISED PETROLEUM SERV LTD28 citations92
US6152228ANov 28, 2000
Apparatus and method for circulating fluid in a borehole
SPECIALISED PETROLEUM SERV LTD27 citations92
US7322419B2Jan 29, 2008
Circulating sub and method
SPECIALISED PETROLEUM SERV LTD8 citations74