Inventor
HERN GREGORY L
US39 patents
⚠️ This page may combine multiple inventors who share the name “HERN GREGORY L”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
BAKER HUGHES INC
22 patentsUS6607031B2Aug 19, 2003
Screened boot basket/filter
BAKER HUGHES INC60 citations96
US8356671B2Jan 22, 2013
Tool with multi-size ball seat having segmented arcuate ball support member
BAKER HUGHES INC24 citations91
US6763753B1Jul 20, 2004
Hydraulic wireline cutter
BAKER HUGHES INC24 citations90
US7934559B2May 3, 2011
Single cycle dart operated circulation sub
BAKER HUGHES INC24 citations89
US10041333B2Aug 7, 2018
One trip drill and casing scrape method and apparatus
BAKER HUGHES INC5 citations84
US7513303B2Apr 7, 2009
Wellbore cleanup tool
BAKER HUGHES INC18 citations84
US9624751B2Apr 18, 2017
Partly disintegrating plug for subterranean treatment use
BAKER HUGHES INC10 citations83
US8353349B2Jan 15, 2013
Retaining and isolating mechanisms for magnets in a magnetic cleaning tool
BAKER HUGHES INC7 citations83
US5363930ANov 15, 1994
Dual-diaphragm lubricant compensator for earth-boring bits
BAKER HUGHES INC18 citations74
US9416626B2Aug 16, 2016
Downhole debris removal tool and methods of using same
BAKER HUGHES INC5 citations73
US9273526B2Mar 1, 2016
Downhole anchoring systems and methods of using same
BAKER HUGHES INC5 citations73
US9428986B2Aug 30, 2016
Disintegrating plug for subterranean treatment use
BAKER HUGHES INC5 citations72
US4832135AMay 23, 1989
Flow through raise boring bit
BAKER HUGHES INC9 citations72
US6805197B2Oct 19, 2004
Hydraulic wireline cutter
BAKER HUGHES INC11 citations71
US9926745B2Mar 27, 2018
Whipstock valve with nozzle bypass feature
BAKER HUGHES INC3 citations69
US7562703B2Jul 21, 2009
Annular flow shifting device
BAKER HUGHES INC6 citations62
US5199510AApr 6, 1993
Raise boring head and stem assembly method
BAKER HUGHES INC4 citations59
US7703533B2Apr 27, 2010
Shear type circulation valve and swivel with open port reciprocating feature
BAKER HUGHES INC3 citations58
US10081997B2Sep 25, 2018
Watermelon mill with replaceable cutting structure
BAKER HUGHES INC0 citations51
US9874071B2Jan 23, 2018
Disintegrating plug for subterranean treatment use
BAKER HUGHES INC0 citations51
US9422966B2Aug 23, 2016
Shear member post shear segment retention apparatus
BAKER HUGHES INC0 citations51
US9677357B2Jun 13, 2017
Anchor slip and seal locking mechanism
BAKER HUGHES INC0 citations39
BAKER HUGHES A GE CO LLC
6 patentsUS10227823B2Mar 12, 2019
Window mill hydraulic line connection
BAKER HUGHES A GE CO LLC15 citations86
US10480248B2Nov 19, 2019
Whipstock valve with nozzle bypass feature
BAKER HUGHES A GE CO LLC2 citations69
US10954732B2Mar 23, 2021
Hydraulically set open hole whipstock
BAKER HUGHES A GE CO LLC1 citations59
US10487628B2Nov 26, 2019
One trip drill and casing scrape method and apparatus
BAKER HUGHES A GE CO LLC0 citations52
US10526856B2Jan 7, 2020
Hydraulically set open hole whipstock
BAKER HUGHES A GE CO LLC0 citations48
US10822896B2Nov 3, 2020
Bypass valve
BAKER HUGHES A GE CO LLC0 citations40
HERN GREGORY L
4 patentsUS8511375B2Aug 20, 2013
Wellbore cleaning devices
HERN GREGORY L10 citations80
US8387700B2Mar 5, 2013
Wellbore debris cleanout assembly and method to remove debris from a debris catcher
HERN GREGORY L2 citations61
US8336626B2Dec 25, 2012
Downhole magnetic retrieval devices with fixed magnetic arrays
HERN GREGORY L4 citations60
US12044086B2Jul 23, 2024
Annular pressure activated downhole tool
HERN GREGORY L0 citations50