Inventor
LUTGRING KEITH T
US20 patents
⚠️ This page may combine multiple inventors who share the name “LUTGRING KEITH T”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
FRANK S INR INC
12 patentsUS7096948B2Aug 29, 2006
Method and multi-purpose apparatus for dispensing and circulating fluid in wellbore casing
FRANK S INR INC64 citations99
US6595288B2Jul 22, 2003
Method and multi-purpose apparatus for dispensing and circulating fluid in wellbore casing
FRANK S INR INC111 citations99
US6302199B1Oct 16, 2001
Mechanism for dropping a plurality of balls into tubulars used in drilling, completion and workover of oil, gas and geothermal wells
FRANK S INR INC104 citations97
US5918673AJul 6, 1999
Method and multi-purpose apparatus for dispensing and circulating fluid in wellbore casing
FRANK S INR INC112 citations97
US7874361B2Jan 25, 2011
Methods and devices for forming a wellbore with casing
FRANK S INR INC33 citations96
US7635026B2Dec 22, 2009
Methods and devices for forming a wellbore with casing
FRANK S INR INC36 citations96
US6425442B1Jul 30, 2002
Anti-rotation device for use with well tools
FRANK S INR INC64 citations92
US6571880B1Jun 3, 2003
Method and multi-purpose apparatus for control of fluid in wellbore casing
FRANK S INR INC54 citations90
US7159619B2Jan 9, 2007
Thread protector for use on pin end of oilfield tubulars
FRANK S INR INC48 citations89
US7357434B2Apr 15, 2008
Load ring for lifting by elevator, of casing having no upset
FRANK S INR INC9 citations82
US8708043B2Apr 29, 2014
Methods and multi-purpose apparatus for dispensing and circulating fluid in wellbore casing
FRANK S INR INC3 citations74
US7370698B2May 13, 2008
Method and apparatus for transferring rig weight to tubulars
FRANK S INR INC3 citations74