1
Kenneth K Liang, Philippe G Herve, Fred E Stanke: Method and apparatus for inspecting well bore casing. Schlumberger Technology Corporation, Brigitte L Jeffery, David Garrod, Keith G W Smith, February 10, 1998: US05717169 (111 worldwide citation)

An improved technique for determining the thickness of a member, especially pipe such as fluid-filled casing in an earth borehole, includes the following steps: directing a pulse of ultra-sonic energy toward the inner surface of the pipe and receiving/storing, as a function of time, signals represen ...


2
William F Murphy, Andrew J Reischer, John J Orrange, Ian D Bryant, Allison M Fazio: Apparatus for creating, testing, and modifying geological subsurface models. Schlumberger Technology Corporation, William B Batzer, David Garrod, May 30, 2000: US06070125 (74 worldwide citation)

A computer-based apparatus for creating subsurface models having a graphical display device, a user input device, means for selecting a region of the world to be modeled; means for providing geophysical and geographical data corresponding to the selected region of the world; means for providing an a ...


3
James Bernardin, Peter Lee, James Lewis: Using execution statistics to select tasks for redundant assignment in a distributed computing platform. DataSynapse, David Garrod, August 15, 2006: US07093004 (70 worldwide citation)

The invention provides an off-the-shelf product solution to target the specific needs of commercial users with naturally parallel applications. A top-level, public API provides a simple “compute server” or “task farm” model that dramatically accelerates integration and deployment. A number of descri ...


4
Abdurrahman Sezginer, Douglas D Griffin: Pulsed nuclear magnetism tool for formation evaluation while drilling including a shortened or truncated CPMG sequence. Schlumberger Technology Corporation, Leonard W Pojunas, Brigitte L Jeffery, David Garrod, January 6, 1998: US05705927 (56 worldwide citation)

The instruments of a pulsed nuclear magnetic resonance (NMR) device are included in a drill collar for evaluating earth formations. The resulting tool makes NMR measurements while the formation is being drilled. Permanent magnets produce a static field in the earth formation. Shimming permanent magn ...


5
William F Murphy, Andrew J Reischer, John J Orrange, Ian D Bryant, Allison M Fazio: Article of manufacturing for creating, testing, and modifying geological subsurface models. Schlumberger Technology Corporation, William B Batzer, David Garrod, March 7, 2000: US06035255 (49 worldwide citation)

An article of manufacture for use in connection with a computer, said article of manufacture comprising a computer-readable storage medium having a program recorded thereon that enables a user of a computer executing said program to interactively: display data obtained from a subsurface area; select ...


6
William F Murphy, Andrew J Reischer, John J Orrange, Ian D Bryant, Allison M Fazio: Method for creating, testing, and modifying geological subsurface models. Schlumberger Technology Corporation, William B Batzer, David Garrod, March 28, 2000: US06044328 (39 worldwide citation)

A computer implemented-method of creating subsurface models, including, for example, the steps of: selecting a region of the world to be modeled; providing geophysical and geographical data corresponding to the selected region; providing an archive of known geological structures; and providing an in ...


7
Eric Paul Donzier: Method and apparatus for optically discriminating between the phases of a three-phase fluid. Intellectual Property Law Dept Schlumberger Doll Research, Keith Smith, David Garrod, September 21, 1999: US05956132 (37 worldwide citation)

To discriminate optically between the various phases in a three-phase fluid, a light beam (F) of non-zero divergence is injected into a detector block (10) made of a material whose refractive index is greater than the refractive indices of all three phases of the fluid. The block (10) has a sensitiv ...


8
Bikash K Sinha: Method for estimating formation in-situ stress magnitudes using a sonic borehole tool. Schlumberger Technology Corporation, David Garrod, Brigitte L Jeffery, November 17, 1998: US05838633 (35 worldwide citation)

A method of estimating formation in-situ stress magnitude and nonlinear constants of an earth formation traversed by a borehole includes analyzing the flexural wave dispersions for dipole sources aligned parallel and perpendicular to the maximum far-field compressive stress direction together with t ...


9
Carlos Torres Verdin, Sheng Fang, Vladimir Druskin, Ian Bryant, Metin Karakas: Method for sensing and estimating the shape and location of oil-water interfaces in a well. Schlumberger Technology Corporation, Brigitte L Jeffrey, Keith G W Smith, David Garrod, June 16, 1998: US05767680 (31 worldwide citation)

Inception of hydrocarbon extraction from a reservoir causes the oil-water interface to warp and cusp toward the extraction gates along a well. This invention proposes time-lapse DC/AC measurements with an array of permanently deployed sensors in order to detect and estimate the change in geometry an ...


10
Erik Vigen: Method for integrity monitoring in position determination. Geco, William B Batzer, Keith G W Smith, David Garrod, June 8, 1999: US05910789 (28 worldwide citation)

In a method for integrity monitoring in position determination by means of the Global Positioning System (GPS), especially by means of differential GPS (DGPS) or multi-station DGPS, wherein there is employed a monitor station (M) with a first GPS receiver, provided at a location with a known geograp ...