1
Alexandre G E Kosmala, Attilio C Pisoni, Dimitrios K Pirovolou, Spyro J Kotsonis: Actively controlled rotary steerable system and method for drilling wells. Schlumberger Technology Corporation, James L Jackson, Wayne I Kanak, Steven L Christian, July 25, 2000: US06092610 (236 worldwide citation)

An actively controlled rotary steerable drilling system for directional drilling of wells having a tool collar rotated by a drill string during well drilling. A bit shaft has an upper portion within the tool collar and a lower end extending from the collar and supporting a drill bit. The bit shaft i ...


2
Herve Ohmer: Apparatus and method for establishing branch wells from a parent well. Schlumberger Technology Corporation, Gary L Bush, Wayne I Kanak, May 2, 2000: US06056059 (154 worldwide citation)

A method and apparatus for creating multiple branch wells from a parent well is disclosed. According to a first embodiment of the invention a multiple branching sub is provided for placement at a branching node of a well. Such sub includes a branching chamber and a plurality of branching outlet memb ...


3
Jacques Orban, Neil W Richardson: Method for directionally drilling a borehole. Schlumberger Technology Corporation, David L Moseley, Wayne I Kanak, November 21, 1995: US05467832 (141 worldwide citation)

In accordance with illustrative embodiments of the present invention, a measuring-while-drilling system includes a sensor sub positioned at the lower end of a downhole motor assembly so that the sub is located near the drill bit. The sub houses instrumentalities that measure various downhole paramet ...


4
Herve Ohmer: Method and apparatus for establishing branch wells at a node of a parent well. Schlumberger Technology Corporation, Gary L Bush, Wayne I Kanak, August 31, 1999: US05944107 (135 worldwide citation)

A method and apparatus for creating multiple branch wells from a parent well is disclosed. A multiple branching sub is provided for placement at a branching node of a well. Such sub includes a branching chamber and a plurality of branching outlet members. The outlet members during construction of th ...


5
Brian Clark, Stephen D Bonner, Jacques Jundt, Martin Luling: Well logging apparatus having toroidal induction antenna for measuring, while drilling, resistivity of earth formations. Schlumberger Technology Corporation, Martin M Novack, Wayne I Kanak, John J Ryberg, August 10, 1993: US05235285 (132 worldwide citation)

Apparatus is disclosed for determining the resistivity of formations surrounding an earth borehole. An electrically conductive metal body, such as a drill collar on a drill string, is movable through the borehole. A transmitting toroidal coil antenna is disposed on the body and is energized to induc ...


6
Daniel Lerner, Peter Masak: Integrated modulator and turbine-generator for a measurement while drilling tool. Schlumberger Technology Corporation, David P Gordon, Wayne I Kanak, May 14, 1996: US05517464 (122 worldwide citation)

An integrated modulator and turbine-generator includes a turbine impeller which is directly coupled by a drive shaft to a modulator rotor downstream from the impeller. The modulator rotor is further coupled by a drive shaft and a gear train to a three phase alternator downstream of the modulator rot ...


7
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 ...


8
Herve Ohmer: Method for establishing branch wells at a node of a parent well. Schlumberger Technology Corporation, Wayne I Kanak, Gary L Bush, June 27, 2000: US06079495 (121 worldwide citation)

A method for creating multiple branch wells from a parent well is disclosed. A multiple branching sub is provided for placement at a branching node of a well. Such sub includes a branching chamber and a plurality of branching outlet members. The outlet members during construction of the branching su ...


9
Jacques Orban, Neil W Richardson: Method of and apparatus for making near-bit measurements while drilling. Schlumberger Technology Corporation, David L Moseley, Wayne I Kanak, September 5, 1995: US05448227 (112 worldwide citation)

In accordance with illustrative embodiments of the present invention, a measuring-while-drilling system includes a sensor sub positioned at the lower end of a downhole motor assembly so that the sub is located near the drill bit. The sub houses instrumentalities that measure various downhole paramet ...


10
Stuart Schaaf, Jean Seydoux, Walter Thain, Marcus Wernig, Alain Dorel: Apparatus and system for making at-bit measurements while drilling. Schlumberger Technology Corporatioin, Steven L Christian, Wayne I Kanak, May 2, 2000: US06057784 (100 worldwide citation)

The system of the present invention includes measurement instrumentation that is located in or near the drill bit and used in a measuring-while-drilling system. The instrumentation can be located in a bit box, an extended sub between the drilling motor assembly and the bit box or in the drill bit. T ...