Benjamin Peter Jeffryes: Method of seismic surveying. Westerngeco L L C, Jody Lynn DeStefanis, Steven Gahlings, William L Wang, May 23, 2006: US07050356 (51 worldwide citation)

A method of seismic surveying comprising the steps of actuating the or each vibrator in a first vibrator group at time T0, and subsequently actuating the or each vibrator in a second vibrator group at time T1 that satisfies T0

Chaur Jian Hsu, Jahir A Pabon, Bikash A Sinha: Quadrupole acoustic shear wave logging while drilling. Schlumberger Technology Corporation, Jody Lynn DeStefanis, William B Batzer, John J Ryberg, October 7, 2003: US06631327 (44 worldwide citation)

A tool generates signals indicative of shear wave slowness of the formation surrounding a borehole. The tool comprises a collar portion adapted for mounting in a drill string, a quadrupole sonic transmitter mounted to the collar portion, and a quadrupole sonic receiver array mounted to the collar sp ...

Yong Hua Chen, Tarek M Habashy: Apparatus and methods for measuring formation characteristics in presence of conductive and non-conductive muds. Schlumberger Technology Corporation, David P Gordon, Jody Lynn DeStefanis, William L Wang, June 27, 2006: US07066282 (43 worldwide citation)

Tools for investigating an earth formation in the presence of either oil-base or water-base mud include a circuit which induces current into the formation in a focused manner, and a sensor electrode which is isolated from the circuit, at least partially surrounded by the circuit, and located in the ...

Stein Inge Pedersen: Image feature extraction. Schlumberger Technology Corporation, William Batzer, Vincent P Loccisano, Jody Lynn DeStefanis, April 10, 2007: US07203342 (43 worldwide citation)

A method of extracting desired features from a cellular image including the steps of: (a) selecting an initial cell within the image; (b) selecting an additional cell, near the initial cell, appearing to be associated with a desired feature; (c) repeating step (b) for further cells, near at least on ...

Jian Zhou, Trevor Hughes: Aqueous viscoelastic fluid. Schlumberger Technology Corporation, Jody Lynn DeStefanis, William L Wang, Dale Gaudier, May 2, 2006: US07036585 (41 worldwide citation)

The invention concerns an aqueous viscoelastic fluid for use in the recovery of hydrocarbons. According to the invention this fluid comprises a first viscoelastic surfactant and a second surfactant able to decompose under downhole conditions to release a compound itself able to reduce the viscosity ...

Hilde Grude Borgos, Paul Kvia, Thorleif Skov, Lars Sonneland, Trygve Randen: Extrema classification. Schlumberger Technology Corporation, Vincent P Loccisano, William B Batzer, Jody Lynn DeStefanis, July 24, 2007: US07248539 (41 worldwide citation)

A method for automated extraction of surface primitives from seismic data is presented. A preferred embodiment of the method includes defining, typically with sub-sample precision, positions of seismic horizons through an extrema representation of a 3D seismic input volume; deriving coefficients tha ...

Ahmed Hammami, Gerald H Meeten, Bernadette Craster, Scott Jacobs, Joseph A Ayoub, Philippe Lacour Gayet, Jean Desroches, Simon G James, Saad Bargach, Gary L Rytlewski, Iain Cooper: Methods and apparatus for completing a well. Schlumberger Technology Corporation, Steven Gahlings Esq, Jim McAleenan Esq, Jody Lynn DeStefanis Esq, September 9, 2008: US07422060 (41 worldwide citation)

Methods and tools are described to reduce sanding including the steps of fracturing the cement sheath in a localized zone around the casing and having the fractured zone act as sand filter between the formation and openings in the casing, with the openings being best pre-formed but temporarily block ...

Michael David Prange, Peter Gerhard Tilke, Clinton Dane Chapman, Darren Lee Aklestad: Geometrical optimization of multi-well trajectories. Schlumberger Technology Corporation, James McAleenan, Vincent Loccisano, Jody Lynn DeStefanis, December 2, 2008: US07460957 (41 worldwide citation)

A novel method is presented to automatically design a multi-well development plan given a set of previously interpreted subsurface targets. This method identifies the optimal plan by minimizing the total cost as a function of existing and required new platforms, the number of wells, and the drilling ...

Neil Bostrom, Douglas D Griffin, Robert L Kleinberg: Method and apparatus for the detection of bubble point pressure. Schlumberger Technology Corporation, Jody Lynn DeStefanis, William B Batzer, John J Ryberg, July 6, 2004: US06758090 (41 worldwide citation)

The present invention discloses a method and apparatus to detect bubbles in a fluid sample to determine if gases are present, wherein an ultrasonic source is used and its properties monitored. Fluctuations in the ultrasonic source's electrical properties indicate the presence of bubbles/gas. Al ...

Charles Jenkins, Michael Barrett, Harry Barrow, Paul Dickenson, Ashley Johnson: Radio frequency tags for turbulent flows. Schlumberger Technology Corporation, Steven Gahlings, James McAleenan, Jody Lynn DeStefanis, November 25, 2008: US07455108 (39 worldwide citation)

A system for communicating information, particular for use in a hydrocarbon well, is described including one or more releasable vessels having radio frequency (RF) circuitry responsive, when in use, to an RF reader system, the vessel including counteracting means to reduce the effect of destabilizin ...