Assignee
GEOSERVICES
FR20 patents
Top patents by PatentIndex Score
US5394141AFeb 28, 1995
Method and apparatus for transmitting information between equipment at the bottom of a drilling or production operation and the surface
GEOSERVICES193 citations96
US5163714ANov 17, 1992
Electronically-nonconducting system for the connection of metal tubular elements, especially suitable for use as an antenna framework located at great depth
GEOSERVICES67 citations95
US5090256AFeb 25, 1992
Method and apparatus for sampling the gaseous content of a liquid
GEOSERVICES63 citations95
US4684946AAug 4, 1987
Device for transmitting to the surface the signal from a transmitter located at a great depth
GEOSERVICES117 citations95
US5945923AAug 31, 1999
Device and method for transmitting information by electromagnetic waves
GEOSERVICES80 citations94
US7669665B2Mar 2, 2010
Mandrel for introduction into a fluid circulation duct, and related production well
GEOSERVICES22 citations91
US4798805AJan 17, 1989
Apparatus and process for pyrolysis and analysis of samples containing organic matter
GEOSERVICES27 citations91
US4766442AAug 23, 1988
Antenna structure for use with a transmitter located at a great depth
GEOSERVICES45 citations91
US7032444B2Apr 25, 2006
Module for extracting gas from an underground liquid and installation equipped therewith
GEOSERVICES24 citations90
US6628206B1Sep 30, 2003
Method and system for the transmission of informations by electromagnetic wave
GEOSERVICES31 citations90
US6404350B1Jun 11, 2002
Device for providing an electrically insulated connection between two metal elements
GEOSERVICES37 citations90
US7392138B2Jun 24, 2008
Method for determining the content of at least one given gas in a drilling mud, associated device and rig
GEOSERVICES43 citations88
US6614718B2Sep 2, 2003
Device and method for seismic drill hole measuring
GEOSERVICES50 citations88
US6410862B1Jun 25, 2002
Device and method for measuring the flow rate of drill cuttings
GEOSERVICES29 citations86
US7652592B2Jan 26, 2010
Data transmission device
GEOSERVICES14 citations81
US7114697B2Oct 3, 2006
Fast valve actuator and tool provided with same
GEOSERVICES14 citations79
US4565007AJan 21, 1986
Process and apparatus for measuring the coiled/uncoiled length of winding gear cable
GEOSERVICES13 citations72
US4134294AJan 16, 1979
Device for simultaneously measuring various parameters of the drilling fluid
GEOSERVICES9 citations65
US7520166B2Apr 21, 2009
Method for detecting hydrocarbons in geological strata
GEOSERVICES3 citations57
US7151465B2Dec 19, 2006
Method and apparatus for transmitting information between a salt-cavern and the surface of the ground
GEOSERVICES4 citations49