1
Toru Terabayashi, Akihito Chikenji, Tsutomu Yamate, Oliver C Mullins, Andrew L Kurkjian, Hani Elshahawi: Methods and apparatus of downhole fluid analysis. Schlumberger Technology Corporation, Matthias Abrell, Jaime Castano, Dale Gaudier, December 9, 2008: US07461547 (60 worldwide citation)

Methods and apparatus for downhole analysis of formation fluids by isolating the fluids from the formation and/or borehole in a pressure and volume control unit that is integrated with a flowline of a fluid analysis module and determining fluid characteristics of the isolated fluids. Parameters of i ...


2
Victor M Bolze, Jonathan W Brown, Andrew L Kurkjian, Timothy L Long, Angus J Melbourne, Linward A Moore, Robert P Zimmerman: Formation fluid sampling apparatus and method. Schlumberger Technology Corporation, J L Jennie Salazar, Brigitte L Jeffery, John Ryberg, February 10, 2004: US06688390 (54 worldwide citation)

A sample module is provided for use in a downhole tool to obtain fluid from a subsurface formation penetrated by a wellbore. The sample module includes a sample chamber carried by the module for collecting a sample of formation fluid obtained from the formation via the downhole tool, and a validatio ...


3
Thomas D MacDougall, Andrew L Kurkjian, Miles Jaroska, Aaron G Flores, Duane F LaDue: Apparatus and method for sampling an earth formation through a cased borehole. Schlumberger Technology Corporation, Brigitte L Jeffery, John J Ryberg, December 2, 1997: US05692565 (50 worldwide citation)

An apparatus is disclosed for perforating, testing and resealing casing in an earth formation borehole. The apparatus is moveable through the casing. The apparatus can also be mounted on a wireline, on tubing or on both. A perforating device is mounted in the apparatus for producing a perforation in ...


4
Frank R Halford, Walter R Benson, Clive P Eckersley, Andrew L Kurkjian: Downholed system and method for determining formation properties. Schlumberger Technology Corporation, John J Ryberg, Brigitte L Jeffery, Steven L Christian, July 25, 2000: US06092416 (41 worldwide citation)

In this invention, drill pipe or tubing is attached to a sampling tool that is suspended in a borehole. A wireline cable also connects the tool to surface equipment and establishes electrical communication between the tool and the surface equipment. A valve located in the docking head assembly contr ...


5
Andrew L Kurkjian, Shu Kong Chang: Method and apparatus for acoustic dipole shear wave well logging. Schlumberger Technology Corporation, David H Carroll, Stephen L Borst, David G Coker, October 6, 1987: US04698792 (33 worldwide citation)

The shear velocity of a formation traversed by a fluid-filled borehole is determined in the presence of a significant flexural mode arrival. A plurality of waveforms are obtained from a dipole acoustic investigation of the formation relative to a common location in the borehole. The flexural mode ph ...


6
Andrew L Kurkjian, Shu Kong Chang, Ann H Everhart: Method and apparatus for acoustic dipole direct shear wave well logging. Schlumberger Technology Corporation, David H Carroll, David G Coker, Stephen L Borst, October 27, 1987: US04703460 (30 worldwide citation)

The shear velocity of a formation traversed by a fluid-filled open or cased borehole is obtained directly. Waveforms are obtained from a dipole acoustic investigation of the formation relative to a common location in the borehole. In this investigation, the bandwidth of the waveforms is substantiall ...


7
Chengli Dong, Peter S Hageman, Oliver C Mullins, Go Fujisawa, Soraya S Betancourt, Julian Pop, Andrew L Kurkjian, Toru Terabayashi, Hani M Elshahawi: Determining fluid properties from fluid analyzer. Schlumberger Technology Corporation, J L Jennie Salazar, Victor H Segura, Brigitte L Echols, October 18, 2005: US06956204 (28 worldwide citation)

A method for determining properties of a formation fluid including obtaining data related to an optical density at a methane peak and an optical density at an oil peak for a fluid sample at a plurality of times, calculating an apparent gas-oil-ratio of the sample fluid from the optical density of th ...


8
Darcy Freemark, Craig Borman, Ahmed Hammami, Moin Muhammed, Scott Jacobs, Jonathan W Brown, Andrew L Kurkjian, Chengli Dong, Brindesh Dhruva, Kenneth L Havlinek, Anthony R H Goodwin: Fluid analysis method and apparatus. Schlumberger Technology Corporation, Dave R Hofman, Darla Fonseca, Jaime Castano, December 2, 2008: US07458252 (24 worldwide citation)

A fluid analysis assembly for analyzing a fluid the fluid analysis assembly includes a chamber, a fluid movement device, a pressurization assembly and at least one sensor. The chamber defines an evaluation cavity for receiving the fluid. The fluid movement device has a force medium applying force to ...


9
Derek Caudwell, Anthony R H Goodwin, Martin Trusler, Michael W Frels, Kai Hsu, Jonathan W Brown, Julian J Pop, Bunker M Hill, Andrew L Kurkjian: Apparatus and method for formation evaluation. Schlumberger Technology Corporation, Matthias Abrell, Kevin P McEnaney, William Batzer, May 29, 2007: US07222671 (20 worldwide citation)

A viscometer for a down hole tool positionable in a well bore penetrating a subterranean formation is described. The formation contains at least one fluid therein. The down hole tool is adapted to convey at least a portion of the fluid to the viscometer. The viscometer comprises a sensor unit, and a ...


10
Andrew L Kurkjian, Jean Marc Follini, Patrick J Fisseler, Thomas W Palmer II, Alexander Zazovsky: Method and apparatus for determining downhole pressures during a drilling operation. Schlumberger Technology Corporation, J L Jennie Salazar, Victor H Segura, Brigitte L Echols, June 20, 2006: US07062959 (17 worldwide citation)

A method and apparatus is provided to determine downhole pressures, such as annular pressure and/or pore pressure, during a drilling operation. A downhole drilling tool includes at least one conduit and a corresponding gauge. The conduit is positioned in the downhole tool and has an opening adapted ...