Inventor
MARSHALL JONATHAN
US52 patents
⚠️ This page may combine multiple inventors who share the name “MARSHALL JONATHAN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HALL DAVID R
25 patentsUS7404725B2Jul 29, 2008
Wiper for tool string direct electrical connection
HALL DAVID R61 citations98
US8061784B2Nov 22, 2011
Retention system
HALL DAVID R45 citations97
US7537051B1May 26, 2009
Downhole power generation assembly
HALL DAVID R45 citations96
US8414085B2Apr 9, 2013
Shank assembly with a tensioned element
HALL DAVID R43 citations94
US7648210B2Jan 19, 2010
Pick with an interlocked bolster
HALL DAVID R51 citations94
US8297375B2Oct 30, 2012
Downhole turbine
HALL DAVID R27 citations93
US7537053B1May 26, 2009
Downhole electrical connection
HALL DAVID R21 citations93
US7488194B2Feb 10, 2009
Downhole data and/or power transmission system
HALL DAVID R32 citations92
US8365821B2Feb 5, 2013
System for a downhole string with a downhole valve
HALL DAVID R19 citations90
US9085941B2Jul 21, 2015
Downhole tool piston assembly
HALL DAVID R8 citations84
US8333254B2Dec 18, 2012
Steering mechanism with a ring disposed about an outer diameter of a drill bit and method for drilling
HALL DAVID R14 citations84
US8297378B2Oct 30, 2012
Turbine driven hammer that oscillates at a constant frequency
HALL DAVID R19 citations84
US8267196B2Sep 18, 2012
Flow guide actuation
HALL DAVID R6 citations84
US8225883B2Jul 24, 2012
Downhole percussive tool with alternating pressure differentials
HALL DAVID R11 citations84
US8201645B2Jun 19, 2012
Downhole tool string component that is protected from drilling stresses
HALL DAVID R15 citations84
US7661487B2Feb 16, 2010
Downhole percussive tool with alternating pressure differentials
HALL DAVID R14 citations84
US7624821B1Dec 1, 2009
Constricting flow diverter
HALL DAVID R17 citations84
US7462051B2Dec 9, 2008
Wiper for tool string direct electrical connection
HALL DAVID R12 citations84
US8365820B2Feb 5, 2013
System for a downhole string with a downhole valve
HALL DAVID R10 citations82
US8342266B2Jan 1, 2013
Timed steering nozzle on a downhole drill bit
HALL DAVID R6 citations73
US8172009B2May 8, 2012
Expandable tool with at least one blade that locks in place through a wedging effect
HALL DAVID R6 citations73
US8820440B2Sep 2, 2014
Drill bit steering assembly
HALL DAVID R2 citations63
US8408336B2Apr 2, 2013
Flow guide actuation
HALL DAVID R3 citations63
US8353354B2Jan 15, 2013
Crawler system for an earth boring system
HALL DAVID R4 citations63
US8281880B2Oct 9, 2012
Expandable tool for an earth boring system
HALL DAVID R4 citations63
SCHLUMBERGER TECHNOLOGY CORP
12 patentsUS8033615B2Oct 11, 2011
Retention system
SCHLUMBERGER TECHNOLOGY CORP46 citations97
US8007051B2Aug 30, 2011
Shank assembly
SCHLUMBERGER TECHNOLOGY CORP47 citations93
US7730975B2Jun 8, 2010
Drill bit porting system
SCHLUMBERGER TECHNOLOGY CORP23 citations93
US7730972B2Jun 8, 2010
Downhole turbine
SCHLUMBERGER TECHNOLOGY CORP25 citations93
US8365843B2Feb 5, 2013
Downhole tool actuation
SCHLUMBERGER TECHNOLOGY CORP13 citations84
US8365842B2Feb 5, 2013
Ratchet mechanism in a fluid actuated device
SCHLUMBERGER TECHNOLOGY CORP8 citations84
US7946656B2May 24, 2011
Retention system
SCHLUMBERGER TECHNOLOGY CORP7 citations84
USRE48979EMar 22, 2022
Downhole tool piston assembly
SCHLUMBERGER TECHNOLOGY CORP0 citations63
US8371400B2Feb 12, 2013
Downhole tool actuation
SCHLUMBERGER TECHNOLOGY CORP3 citations63
US8033330B2Oct 11, 2011
Tool string threads
SCHLUMBERGER TECHNOLOGY CORP3 citations63
US7934570B2May 3, 2011
Data and/or PowerSwivel
SCHLUMBERGER TECHNOLOGY CORP4 citations63
USRE47405EMay 28, 2019
Downhole tool piston assembly
SCHLUMBERGER TECHNOLOGY CORP0 citations52
CAMERON INT CORP
4 patentsUS10830359B2Nov 10, 2020
Needle tip and seat for a choke valve
CAMERON INT CORP5 citations83
US12152680B2Nov 26, 2024
Needle tip and seat for a choke valve
CAMERON INT CORP0 citations62
US11796068B2Oct 24, 2023
Needle tip and seat for a choke valve
CAMERON INT CORP0 citations62
US11549593B2Jan 10, 2023
Needle tip and seat for a choke valve
CAMERON INT CORP0 citations62
NOVATEK IP LLC
3 patentsYOTO LTD
2 patentsHALL LABS LLC
2 patentsSMITH INTERNATIONAL
1 patentTVA GROUP LTD
1 patentShowing the top 50 of 52 patents by PatentIndex Score.