1
Mark E Brady, Wayne W Frenier, Palathinkara S Vinod: Fluids and techniques for hydrocarbon well completion. Schlumberger Technology Corporation, Robin Nava, Catherine Menes, Brigitte Jeffrey, May 27, 2003: US06569814 (174 worldwide citation)

The Invention relates to novel fluids and techniques to optimize/enhance the production of hydrocarbon from subterranean formations (e.g., “completion fluids”), in particular, fluids and techniques are disclosed and claimed which remove wellbore damage and near-wellbore damage in the form of coating ...


2
Kevin England: Hydraulic fracturing method. Schlumberger Technology Corporation, Thomas O Mitchell, Robin Nava, Brigitte L Echols, August 17, 2004: US06776235 (173 worldwide citation)

This invention relates generally to the art of hydraulic fracturing in subterranean formations and more particularly to a method and means for optimizing fracture conductivity. According to the present invention, the well productivity is increased by sequentially injecting into the wellbore alternat ...


3
Jesse Lee, Erik Nelson, Kevin England, Philip Sullivan: Methods for controlling the rheological properties of viscoelastic surfactants based fluids. Schlumberger Technology Corporation, Thomas O Mitchell, Tim Curington, Robin Nava, August 1, 2006: US07084095 (125 worldwide citation)

It was found that the addition of polymers to viscoelastic surfactant base system allows to adjust the rheological properties of the base fluid. Depending in particular on one side of the ratio of the concentration of added polymer and the concentration of viscoelastic surfactant and on the other si ...


4
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 ...


5
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 ...


6
Erik B Nelson, Bernhard Lungwitz, Keith Dismuke, Mathew Samuel, Golchi Salamat, Trevor Hughes, Jesse Lee, Philip Fletcher, Diankui Fu, Richard Hutchins, Michael Parris, Gary John Tustin: Viscosity reduction of viscoelastic surfactant based fluids. Schlumberger Technology Corporation, Thomas O Mitchell, Robin Nava, Brigitta L Echols, April 19, 2005: US06881709 (109 worldwide citation)

Methods and compositions are disclosed for controlled addition of components that decrease the viscosity of the viscoelastic surfactant fluids or for controlled changes in the electrolyte concentration or composition of the viscoelastic surfactant fluids. One aspect of the invention relates to the u ...


7
Andrew Acock, Steve Hoover: Method of completing a well in an unconsolidated formation. Schlumberger Technology Corporation, Robin Nava, Brigitte L Echols, John Ryberg, May 11, 2004: US06732800 (105 worldwide citation)

Herein is described a method of completing an interval of a cased well drilled through incompetent formation. This method includes a combination of three successive operations: zero-degree phasing perforation of a relatively small portion of the interval to be completed, consolidation of the formati ...


8
Dean Willberg, Keith Dismuke: Self-destructing filter cake. Schlumberger Technology Corporation, Dave Cate, Thomas O Mitchell, Robin Nava, September 4, 2007: US07265079 (100 worldwide citation)

A composition and method are given for self-destructive fluid loss additives and filter cakes in wellbores and subterranean formations. The fluid loss additives and filter cakes are formed from a mixture of particulate solid acid-precursors, such as a polylactic acid or a polyglycolic acid, and part ...


9
Philip Sullivan, Yenny Christanti, Isabelle Couillet, Stephen Davies, Trevor Hughes, Alexander Wilson: Methods for controlling the fluid loss properties of viscoelastic surfactant based fluids. Schlumberger Technology Corporation, David Cate, Tim Curington, Robin Nava, July 25, 2006: US07081439 (98 worldwide citation)

Disclosed are methods of treating subterranean formations by first providing a suspension of colloidal particles prior to the injection of viscoelastic based treatment fluid, and injecting the treatment fluid into a well. The colloidal particles reduce fluid loss into the formation. According to a s ...


10
John W Still, Keith Dismuke, Wayne W Frenier: Generating Acid Downhole in Acid Fracturing. Schlumberger Technology Corporation, Thomas O Mitchell, Tim Curington, Robin Nava, January 23, 2007: US07166560 (97 worldwide citation)

An acid fracturing method is provided in which the acid is generated in the fracture by hydrolysis of a solid acid-precursor selected from one or more than one of lactide, glycolide, polylactic acid, polyglycolic acid, a copolymer of polylactic acid and polyglycolic acid, a copolymer of glycolic aci ...