Inventor

ANDREWS A BALLARD

US8 patents

⚠️ This page may combine multiple inventors who share the name “ANDREWS A BALLARD”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

SCHLUMBERGER TECHNOLOGY CORP

5 patents

US7959864B2Jun 14, 2011

Downhole spectroscopic hydrogen sulfide detection

SCHLUMBERGER TECHNOLOGY CORP18 citations92

US10012758B2Jul 3, 2018

Solid state lasers

SCHLUMBERGER TECHNOLOGY CORP7 citations82

US7705982B2Apr 27, 2010

Methods and apparatus for analyzing fluid properties of emulsions using fluorescence spectroscopy

SCHLUMBERGER TECHNOLOGY CORP16 citations77

US9759830B2Sep 12, 2017

Method and apparatus for determining mud contamination of formation fluid

SCHLUMBERGER TECHNOLOGY CORP3 citations72

US9359883B2Jun 7, 2016

Zonal compositional production rates in commingled gas wells

SCHLUMBERGER TECHNOLOGY CORP1 citations46

SCHLUMBER TECHNOLOGY CORP

1 patent

US7279678B2Oct 9, 2007

Method and apparatus for composition analysis in a logging environment

SCHLUMBER TECHNOLOGY CORP21 citations92

ANDREWS A BALLARD

1 patent

US8805614B2Aug 12, 2014

Downhole sample analysis method

ANDREWS A BALLARD9 citations78

CHIEFFO LOGAN

1 patent

US9513213B2Dec 6, 2016

System and method of determining rock properties using terahertz-band dielectric measurements

CHIEFFO LOGAN3 citations62