Inventor
HELMS LONNIE C
US13 patents
⚠️ This page may combine multiple inventors who share the name “HELMS LONNIE C”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HALLIBURTON ENERGY SERVICES INC
9 patentsUS9291007B2Mar 22, 2016
Floating apparatus and method for fabricating the apparatus
HALLIBURTON ENERGY SERVICES INC22 citations89
US11492867B2Nov 8, 2022
Downhole apparatus with degradable plugs
HALLIBURTON ENERGY SERVICES INC6 citations73
US10378296B2Aug 13, 2019
Sealed downhole equipment and method for fabricating the equipment
HALLIBURTON ENERGY SERVICES INC3 citations71
US10883334B2Jan 5, 2021
Multi-segmented plug
HALLIBURTON ENERGY SERVICES INC0 citations62
US11603736B2Mar 14, 2023
Buoyancy assist tool with degradable nose
HALLIBURTON ENERGY SERVICES INC0 citations61
US11313189B2Apr 26, 2022
Downhole check valve assembly with a frustoconical mandrel
HALLIBURTON ENERGY SERVICES INC0 citations50
US11313202B2Apr 26, 2022
Systems and methods for controlling fluid flow in a wellbore using a switchable downhole crossover tool
HALLIBURTON ENERGY SERVICES INC0 citations50
US11512545B2Nov 29, 2022
Downhole check valve assembly with a ratchet mechanism
HALLIBURTON ENERGY SERVICES INC0 citations43
US11473395B2Oct 18, 2022
Downhole check valve assembly with a locking mechanism
HALLIBURTON ENERGY SERVICES INC0 citations43
HALLIBURTON CO
4 patentsUS4729432AMar 8, 1988
Activation mechanism for differential fill floating equipment
HALLIBURTON CO229 citations97
US4825902AMay 2, 1989
Flapper valve with protective hinge pin sleeve
HALLIBURTON CO57 citations94
US5040602AAug 20, 1991
Inner string cementing adapter and method of use
HALLIBURTON CO31 citations91
US4470726ASep 11, 1984
Leg closure
HALLIBURTON CO2 citations61