1
Gerard Segeral, Peter Long, Ian Atkinson: Method and apparatus for measuring multiphase flows. Schlumberger Technology Corporation, Martin D Hyden, Keith G W Smith, Brigitte L Jeffery, January 7, 1997: US05591922 (141 worldwide citation)

A device for measuring flow rate of multiphase fluids such as oilwell effluents, containing liquid hydrocarbons, gas, and water includes first and second sections situated at a distance one from the other in the flow direction, each including a passage provided with structure such as venturis for in ...


2
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 ...


3
Oliver C Mullins: Methods and apparatus for determining gas-oil ratio in a geological formation through the use of spectroscopy. Schlumberger Technology Corporation, Keith G W Smith, David P Gordon, August 17, 1999: US05939717 (103 worldwide citation)

Methods according to the invention include providing an OFA tool which subjects formation fluids to NIR illumination and which provides a spectral measurement of peaks at about 6,000 cm.sup.-1 and about 5,800 cm.sup.-1. The methods according to the invention also include calculating a ratio of the a ...


4
David R Barstow, Paul S Barth, Richard E F Dinitz: Method and system for computer programming. Schlumberger Technology Corporation, Martin M Novack, Keith G W Smith, David G Coker, May 2, 1989: US04827404 (85 worldwide citation)

A method and system for computer programming provides a graphical editor function for creation and editing of a computer program by manipulation of graphical images on a high-resolution display. The program is specified in terms of a definition language which can be executed by a simulation function ...


5
Scott C Swanson: Method and system for sensing removal of a utility meter from its socket. Schlumberger, Keith G W Smith, June 4, 1996: US05523559 (80 worldwide citation)

A method and system is disclosed for indication and prevention of tampering with an electricity meter having control circuitry for automatic remote reading. The control circuitry, provided externally of the meter in a base or base extension, to which the meter is connected, is also used for tamper d ...


6
Oliver C Mullins, Xu Wu: Method and apparatus for the downhole compositional analysis of formation gases. Schlumberger Technology Corporation, David P Gordon, Keith G W Smith, January 12, 1999: US05859430 (75 worldwide citation)

A borehole tool analyzes the composition of gases flowing from a formation. The tool includes an optical fluid analyzer (OFA) and a gas analysis module (GAM). The OFA determines when fluid flowing into the tool has become substantially only gas. The gas is then diverted to the GAM, thereby avoiding ...


7
Robert J Schroeder, Eric Udd: Fiber optic pressure transducers and pressure sensing system incorporating same. Schlumberger Technology Corporation, David P Gordon, Keith G W Smith, November 24, 1998: US05841131 (67 worldwide citation)

A fiber optic pressure transducer having enhanced resolution and dynamic range includes a fiber optic core having one or more gratings written onto it, a birefringence structure for enhancing the birefringence of the core, and a structure for converting isotropic pressure forces to anisotropic force ...


8
Burnell G West: Test generation by environment emulation. Schlumberger Technologies, Kenneth Olsen, Keith G W Smith, Bruce D Riter, December 12, 1995: US05475624 (66 worldwide citation)

Generation, validation and fault-grading of test patterns, and test and debug of logic circuits, are enhanced by emulation of the logic circuits in programmable gate arrays. Two emulations of the logic circuit are preferably created, one of which is a "good" model containing no faults and the other ...


9
Robert L Kleinberg, Lawrence L Latour, Abdurrahman Sezginer: Nuclear magnetic resonance borehole logging apparatus and method for ascertaining a volume of hydrocarbons independent of a diffusion coefficient. Schlumberger Technology Corporation, Brigitte L Jeffery, Keith G W Smith, August 18, 1998: US05796252 (65 worldwide citation)

A nuclear magnetic resonance (NMR) logging technique reveals the volume of hydrocarbons in an earth formation. The differences in viscosity among gas, oil and water are used to distinguish among these three fluids. During NMR logging, a parameter of a sequence of magnetic field pulses is altered, ca ...


10
Abdurrahman Sezginer, Robert L Kleinberg: Pulsed nuclear magnetism tool for formation evaluation while drilling. Schlumberger Technology Corporation, Brigitte L Jeffery, Leonard W Pojunas, Keith G W Smith, May 13, 1997: US05629623 (56 worldwide citation)

A permanent magnet of a pulsed nuclear magnetic resonance (NMR) device is positioned within a drill collar for evaluating earth formations. In this way, the torsional and bending strengths of the drill collar are maximized with relatively little sacrifice of the magnetic moment of the permanent magn ...