1
Warren Askew: Downhole adjustable bent housing for directional drilling. Shlumberger Technology Corporation, J L Jennie Salazar, May 28, 2002: US06394193 (78 worldwide citation)

The present invention provides a hydraulically actuated downhole adjustable bent housing for use in directional drilling of bore holes and wells that allows adjustment of the housing from aligned to a bent configuration without raising or lowering the drillstring. The present invention also provides ...


2
Victor M Bolze, Jonathan Brown, Andrew Kurkjian: Reduced contamination sampling. Schlumberger Technology Corporation, J L Jennie Salazar, Brigitte L Jeffery, John Ryberg, December 9, 2003: US06659177 (63 worldwide citation)

A sample module for use in a downhole tool includes a sample chamber for receiving and storing pressurized fluid. A piston is slidably disposed in the chamber to define a sample cavity and a buffer cavity, and the cavities have variable volumes determined by movement of the piston. A first flowline ...


3
Oliver C Mullins, Andrew Kurkjian, Robin McGowan, Thomas Distefano, Ian Traboulay: Methods and apparatus for optically measuring fluid compressibility downhole. Schlumberger Technology Corporation, John Ryberg, J L Jennie Salazar, November 5, 2002: US06474152 (59 worldwide citation)

The compressibility of a formation hydrocarbon sample is determined downhole by using a borehole tool to obtain the sample downhole, and, at two different pressures, subjecting the sample to near infrared illumination and conducting spectral absorption measurement of peaks at and/or around about 6,0 ...


4
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 ...


5
Jonathan Brown, Victor Bolze: Sample chamber with dead volume flushing. Schlumberger Technology Corporation, J L Jennie Salazar, October 22, 2002: US06467544 (54 worldwide citation)

A sample module for use in a downhole tool includes a sample chamber for receiving and storing pressurized fluid. A piston is slidably disposed in the chamber to define a sample cavity and a buffer cavity, and the cavities have variable volumes determined by movement of the piston. A first flowline ...


6
Reinhart Ciglenec, Jacques Tabanou, Thomas MacDougall, Kenneth Havlinek, Arthur Liberman, Ian Bryant, Troy Fields: Well-bore sensor apparatus and method. Schlumberger Technology Corporation, J L Jennie Salazar, Brigitte L Jeffrey, John Ryberg, July 27, 2004: US06766854 (50 worldwide citation)

The present invention relates to a well-bore sensor apparatus and method. The apparatus includes a downhole tool carrying at least one sensor plug for deployment into the sidewall of a well-bore. The apparatus may also be used in conjunction with a surface control unit and a communication link for o ...


7
Reinhart Ciglenec, Jacques R Tabanou: Reservoir management system and method. Schlumberger Technology Corporation, J L Jennie Salazar, February 17, 2004: US06693553 (45 worldwide citation)

An apparatus and a method for controlling oilfield production to improve efficiency includes a remote sensing unit that is placed within a subsurface formation, an antenna structure for transmitting power and communicating signals to the remote sensing unit and for receiving communication signals fr ...


8
Bunker M Hill, Alexander Zazovosky: Method and apparatus for subsurface fluid sampling. Schlumberger Technology Corporation, J L Jennie Salazar, Brigitte L Echols, November 15, 2005: US06964301 (43 worldwide citation)

The apparatuses and methods herein relate to techniques for extracting fluid from a subsurface formation. A downhole sampling tool is provided with a probe having an internal wall capable of selectively diverting virgin fluids into virgin flow channels for sampling, while diverting contaminated flui ...


9
Reinhart Ciglenec, Albert Hoefel: Method and apparatus for determining downhole pressures during a drilling operation. J L Jennie Salazar, Brigitte L Echols, Victor H Segura, January 17, 2006: US06986282 (43 worldwide citation)

A method and apparatus is provided to collect downhole data during a drilling operation via a downhole tool. A differential pressure is created by the difference between internal pressure of fluid passing through the downhole tool and the annular pressure in the wellbore. The apparatus includes a dr ...


10
John E Edwards, John R Lovell: Method for increasing the efficiency of drilling a wellbore, improving the accuracy of its borehole trajectory and reducing the corresponding computed ellise of uncertainty. Schlumberger Technology Corporation, J L Jennie Salazar, June 18, 2002: US06405808 (39 worldwide citation)

A well survey process for combining highly accurate well survey data with lower quality survey data in such manner that survey determination of overall borehole trajectory is improved. The inclination and/or azimuth of the wellbore path at each of the wellbore survey stations is acquired with a MWD ...