Inventor
GUO PINGJUN
US15 patents
⚠️ This page may combine multiple inventors who share the name “GUO PINGJUN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
BAKER HUGHES INC
10 patentsUS7254486B2Aug 7, 2007
Method and apparatus for shale bed detection in deviated and horizontal wellbores
BAKER HUGHES INC20 citations92
US7365308B2Apr 29, 2008
Measurement of formation gas saturation in cased wellbores using pulsed neutron instrumentation
BAKER HUGHES INC44 citations91
US7361887B2Apr 22, 2008
Measurement of formation gas pressure in cased wellbores using pulsed neutron instrumentation
BAKER HUGHES INC20 citations91
US7205535B2Apr 17, 2007
Elemental gamma ray signature instrument
BAKER HUGHES INC42 citations90
US7548817B2Jun 16, 2009
Formation evaluation using estimated borehole tool position
BAKER HUGHES INC14 citations83
US7402797B2Jul 22, 2008
Method and apparatus for determining aluminum concentration in earth formations
BAKER HUGHES INC12 citations83
US7372018B2May 13, 2008
Determination of gas pressure and saturation simultaneously
BAKER HUGHES INC14 citations83
US7282704B2Oct 16, 2007
Method for determining formation porosity and gas saturation in a gas reservoir
BAKER HUGHES INC12 citations83
US7804060B2Sep 28, 2010
Method and apparatus for fluid influx detection while drilling
BAKER HUGHES INC8 citations76
US7649169B2Jan 19, 2010
Method for determining shale bed boundaries and gamma ray activity with gamma ray instrument
BAKER HUGHES INC3 citations62