Bruce W Boyle, Raghu Madhavan, Jacques Jundt: Wired pipe joint with current-loop inductive couplers. Schlumberger Technology Corporation, Jennie, Brigitte L Jeffery, John J Ryberg, November 4, 2003: US06641434 (149 worldwide citation)

A robust, low-loss wired pipe joint is provided for service as a component of a wired pipe string for transmitting measurement data to a surface station from locations in a borehole in oil well drilling and oil well operations. Conductive layers reduce signal energy losses over the length of the dri ...

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 ...


Gary P Bickford, Pete Howard: Metal-sealed, thermoplastic electrical feedthrough. Schlumberger Technology Corporation, Wayne I Kanak, Brigitte L Jeffery, John J Ryberg, January 14, 2003: US06506083 (122 worldwide citation)

An electrical feedthrough includes a connector body made of a metallic material, at least one contact pin inserted through a cavity in the connector body, and an insulating body made of a thermoplastic material formed between the connector body and the contact pin so as to provide a hermetic seal be ...

Dale E Meek, Lawrence J Leising, John D Rowatt: Apparatus and method for orienting a downhole tool. Schlumberger Technology Corporation, Jennie, Brigitte L Jeffery, John J Ryberg, July 16, 2002: US06419014 (113 worldwide citation)

An orienter, particularly on coiled tubing or small diameter drill pipe, includes a motor, turbine, or other device for selectively converting the rotational kinetic energy produced from fluid flow through the device to mechanical power, and applying the mechanical power to a downhole tool through a ...

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 ...

Mark W Brockman: Controlling production. Schlumberger Technology Corporation, Jeffrey E Griffin, Brigitte L Jeffery, Trop Pruner & Hu P C, January 14, 2003: US06505682 (111 worldwide citation)

A tubing is used in a well bore capable of furnishing a well fluid. The tubing has an annular member having a passageway. The tubing has at least one port that is connected to detect a composition of the well fluid and control flow of the well fluid into the passageway based on the composition.

Qiming Li, John Lovell, Mark Fredette: Data compression method for use in wellbore and formation characterization. Schlumberger Technology Corporation, John J Ryberg, Brigitte L Jeffery, Victor H Segura, June 11, 2002: US06405136 (80 worldwide citation)

A method is disclosed for compressing a frame of data representing parameter values, a time at which each parameter value was recorded, and an orientation of a sensor at the time each parameter value was recorded. Generally the method includes performing a two-dimensional transform on the data in th ...

Michelle Mary Felling, Charles W Morris, Robert J Butsch: Method to improve the quality of a formation fluid sample. Schlumberger Technology Corporation, John J Ryberg, Brigitte L Jeffery, Steven L Christian, January 30, 2001: US06178815 (77 worldwide citation)

The present invention provides a method for improving the quality of a formation fluid sample by taking the sample at a time when the formation fluid composition contains the most favorable portion of hydrocarbons. This task is accomplished by determining in real-time, the composition of the fluid f ...

Alan J Sallwasser, Roger A Post, Carl J Roy: Conveying a tool along a non-vertical well. Schlumberger Technology Corporation, John J Ryberg, Brigitte L Jeffery, January 30, 2001: US06179055 (76 worldwide citation)

A conveyance apparatus for conveying at least one logging tool through an earth formation traversed by a horizontal or highly deviated borehole. The conveyance apparatus comprises a pair of arcuate-shaped cams pivotally mounted to a support member, a spring member for biasing the arcuate surface of ...