1
Charles C Counselman: Method and system for determining position on a moving platform, such as a ship, using signals from GPS satellites. Western Atlas International, Norman E Brunell, E Eugene Thigpen, January 16, 1990: US04894662 (261 worldwide citation)

Method and apparatus are disclosed for accurately determining position from GPS satellites and received on a ship using C/A code group delay observable TAU, 308 f.sub.o implicit carrier phase observable PHI, L1 band implicit f.sub.o carrier residual phase observable PSI.sub.L1, and L2 band implicit ...


2
Charles C Counselman III: Multi-antenna gas receiver for seismic survey vessels. Western Atlas International, Norman E Brunell, E Eugene Thigpen, February 28, 1989: US04809005 (194 worldwide citation)

Method and apparatus are disclosed for accurately determining position from GPS satellites and received on a ship using observations of C/A code group delay, L1 band center frequency carrier phase, L1 band 5.115 MHz implicit carrier phase, and L2 band 5.115 MHz implicit carrier phase. A precise meas ...


3
George William Wood, Ricky Lynn Workman, Michael W Norris: Distributed seismic data-gathering system. Western Atlas International, William A Knox, March 3, 1998: US05724241 (141 worldwide citation)

A distributed seismic data acquisition system includes a vast plurality of Autonomous Data Acquisition Modules (ADAM) to each of which are interconnected a subplurality of data-collection channels. Each data collection channel is comprised of an array of seismic sensors for continuously measuring se ...


4
Borislav J Tchakarov, Rocco DiFoggio, Stanislav W Forgang, Otto N Fanini, James C Hunziker, Marcelo F Civarolo: Downhole carbon dioxide gas analyzer. Western Atlas International, Darryl M Springs, April 17, 2001: US06218662 (121 worldwide citation)

A logging tool system for analyzing the carbon dioxide concentration in a fluid sample downhole in a borehole. A chamber is filled with the fluid sample and is closed to isolate the fluid sample from the borehole. The interior chamber volume is expanded to decompress the fluid sample, and a transmit ...


5
Michael C Chang: Alignable, threaded, sealed connection. Western Atlas International, Browning Bushman Zamecki & Anderson, March 13, 1990: US04907828 (101 worldwide citation)

The present invention is directed to an apparatus and method for assembling, aligning and securing a sealed connection. The apparatus and method of the present invention advantageously employ the mechanical leverage of a threaded connection, preferably square threads, to overcome the high O-ring sea ...


6
Srinivasa Chakravarthy, Pravin Gupta, Raghu Chunduru, Berthold F Kriegshauser, Otto N Fanini: Conductivity anisotropy estimation method for inversion processing of measurements made by a transverse electromagnetic induction logging instrument. Western Atlas International, Richard A Fagin, March 28, 2000: US06044325 (93 worldwide citation)

A method for generating an improved estimate of horizontal conductivity, dip angle, azimuth and anisotropy parameter of an earth formation penetrated by a wellbore from dual-frequency transverse electromagnetic induction measurements, comprising generating an initial estimate of the horizontal condu ...


7
Stanislav Forgang, Otto N Fanini, Leonty A Tabarovsky: Method and apparatus for transverse electromagnetic induction well logging. Western Atlas International, Richard A Fagin, July 14, 1998: US05781436 (92 worldwide citation)

A method of measuring the conductivity of earth formations penetrated by a wellbore. The method comprises selectively passing an alternating current through transmitter coils inserted into the wellbore. Each of the transmitter coils has a magnetic moment direction different from the magnetic moment ...


8
Christopher C Payton, Kurt M Strack, Leonty A Tabarovsky: Method and apparatus for measuring transient electromagnetic and electrical energy components propagated in an earth formation. Western Atlas International, Darryl M Springs, September 21, 1999: US05955884 (86 worldwide citation)

A single well transient electromagnetic ("TEM") apparatus and method is disclosed. The invention includes a wireline logging tool adapted for disposition in a borehole drilled in earth formations that has mounted thereon an electromagnetic transmitter and electric field transmitter for applying elec ...


9
John L Leder, John M Michaels, Than Shwe, John C Anderson: Method and apparatus for pressure, volume, and temperature measurement and characterization of subsurface formations. Western Atlas International, James L Jackson, Darryl M Springs, December 12, 1995: US05473939 (85 worldwide citation)

A method and apparatus for conducting in situ tests on a subsurface earth formation of interest which is traversed by a wellbore. A wireline formation testing instrument is positioned at formation depth and a sampling probe thereof is extended into fluid communication with the formation and isolated ...


10
John M Michaels, John T Leder, James T Cernosek: Method and apparatus for acquiring and processing subsurface samples of connate fluid. Western Atlas International, James L Jackson, Darryl M Springs, January 3, 1995: US05377755 (84 worldwide citation)

A method and apparatus for downhole formation testing is provided for acquisition of a phase intact sample of connate fluid by direct or indirect pumping for filling of pressure containing sample tanks that are removable from a formation testing and sampling instrument for phase intact transportatio ...



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