61
Curtis L Boney, Dean M Willberg: Methods and fluid compositions designed to cause tip screenouts. Schlumberger Technology Corporation, Thomas O Mitchell, Robin Nava, Brigitte L Echols, January 4, 2005: US06837309 (117 worldwide citation)

In stimulation treatments to increase the production of hydrocarbons from subterranean formations, especially in treatments including hydraulic fracturing followed by gravel packing, desirable short wide fractures are created and filled with proppant by deliberately including in the first fluid/prop ...


62
Bernard A Montaron: Method and apparatus for completing a well for producing hydrocarbons or the like. Schlumberger Technology Corporation, Gordon G Waggett, Robin C Nava, June 26, 2001: US06250385 (117 worldwide citation)

The invention relates to an expandable liner for completing a hole in an underground formation, the liner being constituted by a spiral-wound strip with the longitudinal edges of the strip having complementary touching profiles so that after it has been expanded, the liner is circular in section. Th ...


63
Simon Gareth James, Paul Richard Howard: Suspension and porous pack for reduction of particles in subterranean well fluids, and method for treating an underground formation. Schlumberger Technology Corporation, John E Vick Jr, July 21, 1998: US05782300 (117 worldwide citation)

The addition of specific fibrous, platelet, and/or fibrous and platelet compositions in mixtures with particulates for or during well treatment procedures such as fracturing and gravel packing decreases or eliminates the undesirable transport or flowback of proppant or formation particulates. Novolo ...


64
Jean Pierre Feraud, Michael D Parris, Richard D Hutchins, Stanley Bruce McConnell, Erik B Nelson, Keith Dismuke: Delayed blending of additives in well treatment fluids. Schlumberger Technology Corporation, Catherine Menes, Brigitte Jeffery, John J Ryberg, September 2, 2003: US06613720 (116 worldwide citation)

The effect of various chemical or biological agents in well treatment fluids can be delayed by sequestering the agents in the discontinuous phase of an emulsion for a period of time, before the emulsion is destabilized by exposure to at least one of: (1) a change in temperature, (2) a change in pH, ...


65
Brian Clark, Jacques Jundt, Martin Luling, Michael O Ross: Well logging apparatus and method for determining formation resistivity at a shallow and a deep depth. Schlumberger Technology Corporation, Martin M Novack, Stephen L Borst, John J Ryberg, February 6, 1990: US04899112 (115 worldwide citation)

Well logging techniques and apparatus are disclosed for determining formation resistivity at different radial depths of investigation and with greater accuracy than prior techniques, for determining the existence, locations and properties of beds and caves, and for determining changes in the size of ...


66
Matthew J Miller, Curtis L Boney, Kevin W England, Jerald J Hinkel: Methods for dewatering shaly subterranean formations. Schlumberger Technology Corporation, Thomas O Mitchell, Catherine Menes, Brigitte Jeffery, December 9, 2003: US06660693 (115 worldwide citation)

Methods are provided for increasing the production of hydrocarbons from shaly formations that contain adsorbed condensed hydrocarbon gases by treating such formations with dewatering compositions comprising surfactants that cause the surfaces of the formation to be or to remain oil-wet. The methods ...


67
Colin J Price Smith, Patrick W Bixenman, Craig D Johnson, Matthew R Hackworth, Garry Sinclair: Expandable completion system and method. Schlumberger Technology Corporation, Robert Van Someren P C, Jeffrey Griffin, Brigitte Jeffery Echols, April 13, 2004: US06719064 (114 worldwide citation)

A well completion has an expanded tubing portion and an unexpanded tubing portion. A seal is provided on the unexpanded portion. In another embodiment, an expandable tubing is provided and a gravel pack operation is performed.


68
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 ...


69
Reinhart Ciglenec, Lennox E Reid: Deployable sensor apparatus and method. Schlumberger Technology Corporation, John J Ryberg, Steven L Christian, May 22, 2001: US06234257 (112 worldwide citation)

An apparatus and method are provided for gathering data from a subsurface formation. A shell is utilized having a chamber therein, and being adapted for sustaining forcible propulsion into the subsurface formation. A data sensor is disposed within the chamber of the shell. The shell has a first port ...


70
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 ...