Inventor
SLAUGHTER JR GREG L
US29 patents
Patents
29 patentsUS10161199B2Dec 25, 2018
Dual member pipe joint for a dual member drill string
CHARLES MACHINE WORKS5 citations84
US9803433B2Oct 31, 2017
Dual member pipe joint for a dual member drill string
CHARLES MACHINE WORKS9 citations84
US9834995B2Dec 5, 2017
Horizontal directional drill pipe drive connection with locking feature
CHARLES MACHINE WORKS4 citations83
US11851956B2Dec 26, 2023
Dual rod assembly and collar installation method
CHARLES MACHINE WORKS2 citations72
US11536094B2Dec 27, 2022
Dual rod assembly and collar installation method
CHARLES MACHINE WORKS3 citations72
US11085239B2Aug 10, 2021
Sealing system for downhole tool
CHARLES MACHINE WORKS3 citations72
US10487595B2Nov 26, 2019
Collar with stepped retaining ring groove
CHARLES MACHINE WORKS3 citations72
US9611695B2Apr 4, 2017
Dual pipe drilling head with improved bearing retention structure
CHARLES MACHINE WORKS5 citations71
US11208851B2Dec 28, 2021
Dual pipe drill head quick interchange joint
CHARLES MACHINE WORKS2 citations70
US11053756B2Jul 6, 2021
Torque-dependent oscillation of a dual-pipe inner pipe section
CHARLES MACHINE WORKS2 citations69
US10036205B2Jul 31, 2018
Stacked-plate reamer
CHARLES MACHINE WORKS2 citations67
US12270263B2Apr 8, 2025
Dual rod assembly and collar installation method
CHARLES MACHINE WORKS0 citations62
US12055014B2Aug 6, 2024
Sealing system for downhole tool
CHARLES MACHINE WORKS0 citations62
US11753874B2Sep 12, 2023
Insert for use with dual-member pipe joint
CHARLES MACHINE WORKS0 citations62
US11661796B2May 30, 2023
Sealing system for downhole tool
CHARLES MACHINE WORKS0 citations62
US11053747B2Jul 6, 2021
Insert for use with dual-member pipe joint
CHARLES MACHINE WORKS0 citations62
US11015392B2May 25, 2021
Dual member pipe joint for a dual member drill string
CHARLES MACHINE WORKS0 citations62
US11828176B2Nov 28, 2023
Dual-member pipe assembly
CHARLES MACHINE WORKS0 citations61
US11002076B2May 11, 2021
Dual-member pipe assembly
CHARLES MACHINE WORKS0 citations61
US12286843B2Apr 29, 2025
Dual pipe drill head quick interchange joint
CHARLES MACHINE WORKS0 citations60
US11578540B2Feb 14, 2023
Dual pipe drill head quick interchange joint
CHARLES MACHINE WORKS0 citations60
US12312944B2May 27, 2025
Fretting-wear resistant beacon lid
CHARLES MACHINE WORKS0 citations51
US10851599B2Dec 1, 2020
Horizontal directional drill pipe drive connection with locking feature
CHARLES MACHINE WORKS0 citations51
US10808461B2Oct 20, 2020
Angular offset drilling tool
CHARLES MACHINE WORKS0 citations51
US10760354B2Sep 1, 2020
Collar with stepped retaining ring groove
CHARLES MACHINE WORKS0 citations51
US10260287B2Apr 16, 2019
Dual-member pipe assembly
CHARLES MACHINE WORKS0 citations51
US11613942B2Mar 28, 2023
Torque-dependent oscillation of a dual-pipe inner section
CHARLES MACHINE WORKS0 citations48
US10538969B2Jan 21, 2020
Stacked-plate reamer
CHARLES MACHINE WORKS0 citations46
US11885223B2Jan 30, 2024
Method to prevent dual rod drill string drag
CHARLES MACHINE WORKS0 citations44