Inventor
WU JIAN-QUN
US41 patents
⚠️ This page may combine multiple inventors who share the name “WU JIAN-QUN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
BAKER HUGHES INC
12 patentsUS5869968AFeb 9, 1999
Method and apparatus for avoiding mutual coupling between receivers in measurement while drilling
BAKER HUGHES INC198 citations97
US5682099AOct 28, 1997
Method and apparatus for signal bandpass sampling in measurement-while-drilling applications
BAKER HUGHES INC188 citations97
US6218841B1Apr 17, 2001
Method and apparatus for determining dip angle, and horizontal and vertical conductivities using multi frequency measurments and a model
BAKER HUGHES INC57 citations96
US6092024AJul 18, 2000
Method and apparatus for determining resistivity and dielectric anisotropy parameters of earth formations by using multifrequency and/or multispacing measurements
BAKER HUGHES INC56 citations96
USRE35386EDec 3, 1996
Method for drilling directional wells
BAKER HUGHES INC80 citations96
US5491488AFeb 13, 1996
Electromagnetic propagation tool using magnetic dipole antennas
BAKER HUGHES INC69 citations96
US5469062ANov 21, 1995
Multiple depths and frequencies for simultaneous inversion of electromagnetic borehole measurements
BAKER HUGHES INC116 citations96
US5331331AJul 19, 1994
Electromagnetic propagation tool using dipole antennas
BAKER HUGHES INC55 citations96
US5574374ANov 12, 1996
Method and apparatus for interrogating a borehole and surrounding formation utilizing digitally controlled oscillators
BAKER HUGHES INC72 citations95
US6081116AJun 27, 2000
Nuclear magnetic resonance apparatus and method for geological applications
BAKER HUGHES INC38 citations93
US6385545B1May 7, 2002
Method and apparatus for determining dip angle and horizontal and vertical conductivities
BAKER HUGHES INC11 citations74
US5438267AAug 1, 1995
Single-switching method of eliminating the effect of electromagnetic coupling between a pair of receivers
BAKER HUGHES INC13 citations74
Bench Tree Group LLC
10 patentsUS9863785B2Jan 9, 2018
System and method of directional sensor calibration
Bench Tree Group LLC4 citations82
US9250100B2Feb 2, 2016
System and method of directional sensor calibration
Bench Tree Group LLC7 citations82
US12119536B2Oct 15, 2024
Electromagnetic tool using slotted point dipole antennas
Bench Tree Group LLC1 citations73
US11682821B2Jun 20, 2023
Electromagnetic tool using slotted point dipole antennas
Bench Tree Group LLC3 citations73
US11616284B2Mar 28, 2023
Electromagnetic tool using slotted point dipole antennas
Bench Tree Group LLC3 citations73
US11619518B2Apr 4, 2023
System and method of directional sensor calibration
Bench Tree Group LLC1 citations71
US10866116B2Dec 15, 2020
System and method of directional sensor calibration
Bench Tree Group LLC1 citations71
US12597694B2Apr 7, 2026
Electromagnetic tool using slotted point dipole antennas
Bench Tree Group LLC0 citations63
US12345547B2Jul 1, 2025
System and method of directional sensor calibration
Bench Tree Group LLC0 citations60
US12565834B2Mar 3, 2026
Electromagnetic antennas system and method of use
Bench Tree Group LLC0 citations45
CIDRA CORP
5 patentsUS6137621AOct 24, 2000
Acoustic logging system using fiber optics
CIDRA CORP92 citations98
US5986749ANov 16, 1999
Fiber optic sensing system
CIDRA CORP108 citations98
US6252656B1Jun 26, 2001
Apparatus and method of seismic sensing systems using fiber optics
CIDRA CORP68 citations96
US6305227B1Oct 23, 2001
Sensing systems using quartz sensors and fiber optics
CIDRA CORP58 citations94
US6227114B1May 8, 2001
Select trigger and detonation system using an optical fiber
CIDRA CORP19 citations84
PREC DRILLING TECH SERV GROUP
4 patentsUS6646441B2Nov 11, 2003
Well logging system for determining resistivity using multiple transmitter-receiver groups operating at three frequencies
PREC DRILLING TECH SERV GROUP122 citations97
US6577129B1Jun 10, 2003
Well logging system for determining directional resistivity using multiple transmitter-receiver groups focused with magnetic reluctance material
PREC DRILLING TECH SERV GROUP142 citations97
US6966211B2Nov 22, 2005
Downhole calibration system for directional sensors
PREC DRILLING TECH SERV GROUP27 citations93
US6585061B2Jul 1, 2003
Calculating directional drilling tool face offsets
PREC DRILLING TECH SERV GROUP67 citations93
WISLER MACMILLAN M
4 patentsUS9366780B2Jun 14, 2016
Steerable magnetic dipole antenna for measurement while drilling applications
WISLER MACMILLAN M6 citations83
US8604796B2Dec 10, 2013
Steerable magnetic dipole antenna for measurement-while-drilling applications
WISLER MACMILLAN M13 citations83
US8471563B2Jun 25, 2013
Steerable magnetic dipole antenna for measurement while drilling applications
WISLER MACMILLAN M17 citations83
US9140817B2Sep 22, 2015
Steerable magnetic dipole antenna for measurement-while-drilling applications
WISLER MACMILLAN M5 citations72