51
Dennis M O Neill, Peter W Mullarkey, Paul C Gingrich, Laurent L Moinard: Method and apparatus for knowledge-based signal monitoring and analysis. Schlumberger Technology Corporation, Charles D Huston, December 28, 1993: US05274572 (124 worldwide citation)

A method and apparatus for monitoring and analysing signal data which uses a network model describing the system under investigation and a runtime agent for acquiring the signal data and accessing the model if an anomaly in the signal data is indicated. The network model describes events of interest ...


52
Kevin W England, Curtis L Boney, Matthew J Miller: Methods for stimulating hydrocarbon production. Schlumberger Technology Corporation, Thomas O Mitchell, Robin Nava, Briqitte L Echols, December 7, 2004: US06828280 (124 worldwide citation)

Methods are provided for stimulation of hydrocarbon production from low permeability formations by hydraulic fracturing, acid fracturing, and hydraulic fracturing followed by gravel packing in a single operation. The methods use a first injected viscous pad made with low concentration uncrosslinked ...


53
Reinhart Ciglenec, Alain P Dorel: Formation pressure measurement while drilling utilizing a non-rotating sleeve. Schlumberger Technology Corporation, Steven L Christian, May 15, 2001: US06230557 (122 worldwide citation)

A downhole tool and method are provided for collecting data from a subsurface formation during drilling operations. The tool includes a tubular mandrel adapted for axial connection in a drill string positioned in a wellbore penetrating the subsurface formation and a stabilizer element or sleeve posi ...


54
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 ...


55
Kenneth C Davidson, John A Kerr, Roderick MacKenzie, Alan J Johnston: System and technique for monitoring and managing the deployment of subsea equipment. Schlumberger Technology Corporation, Jeffrey Griffin, Brigitte Jeffery Echols, Trop Pruner & Nu PC, April 27, 2004: US06725924 (122 worldwide citation)

A system that is usable in a subsea well includes a tubular string that extends from a surface platform toward the sea floor. The string has an upper end and a lower remote end that is located closer to the sea floor than to the platform. At least one sensor of the system is located near the remote ...


56
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 ...


57
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 ...


58
Josiah C Hoskins, Joshua M Ronen: System and method of predicting reservoir properties. Schlumberger Technology Corporation, Charles D Huston, August 22, 1995: US05444619 (119 worldwide citation)

A system and method for predicting oil reservoir properties throughout the reservoir using well data and seismic data. While the reservoir properties in the vicinity of a well borehole are usually known (i.e. by well logging), the reservoir properties between wells are unknown and difficult to estim ...


59
Alberto Malinverno, Michael Prange: Uncertainty constrained subsurface modeling. Schlumberger Technology Corporation, William B Batzer, John J Ryberg, April 15, 2003: US06549854 (119 worldwide citation)

A method, apparatus, and article of manufacture are provided that use measurement data to create a model of a subsurface area. The method includes creating an initial parameterized model having an initial estimate of model parameter uncertainties; considering measurement data from the subsurface are ...


60
Craig D Johnson, Gary Martin Oddie: Flow control regulation method and apparatus. Schlumberger Technology Corporation, Robert Van Someren PC, Jeffrey Griffin, Brigitte Jeffery Echols, September 7, 2004: US06786285 (118 worldwide citation)

A technique for controlling fluid production in a deviated wellbore is disclosed. The technique utilizes a flow pipe the interior of which is in hydraulic communication with the earth's surface. A plurality of flow control valves are disposed at spaced apart positions along the length of the fl ...