Golchehreh Salamat

7111683, Sep 26, 2006

Jun 14, 2004

10/710032

Erik B. Nelson - Houston TX, US
Samuel Danican - Houston TX, US
Golchehreh Salamat - Sugar Land TX, US

Schlumberger Technology Corporation - Sugar Land TX

E21B 33/14

166278, 166292

A formation consolidation process is described which comprises injecting into an unconsolidated or poorly consolidated subterranean formation penetrated by a wellbore an aqueous pumpable system comprising an insoluble silica source (e. g. , colloidal silica, silica fume or fumed silica) and a source of calcium hydroxide (e. g. , aqueous solutions of calcium chloride and sodium hydroxide). The aqueous system may contain a nucleation inhibitor. The components of the aqueous system react to produce a calcium silicate hydrate gel (C-S-H gel) having cementitious properties within the pores of the formation. After the C-S-H gel sets and hardens, the consolidated formation has a high compressive strength (e. g. , 500 psi (about 3. 5 MPa) or more).

7185699, Mar 6, 2007

May 25, 2004

10/709730

Alexander Zazovsky - Houston TX, US
Jian Zhou - Sugar Land TX, US
Christopher Del Campo - Houston TX, US
Golchehreh Salamat - Sugar Land TX, US
Diankui Fu - Missouri City TX, US
Jese C. Lee - Sugar Land TX, US

Schlumberger Technology Corporation - Sugar Land TX

E21B 41/00
C10M 107/32

1662441, 166902, 508579

A composition for use in an oil chamber of a tool includes a hydraulic oil; and a surfactant, wherein the surfactant is present at an amount sufficient to form micelles in the hydraulic oil. The composition may further include an amphiphilic copolymer. A method includes providing a hydraulic fluid composition comprising a hydraulic oil and a surfactant capable of forming micelles in the hydraulic oil; and filling a hydraulic chamber in the tool with the hydraulic fluid composition. The hydraulic fluid composition may further include an amphiphilic copolymer.

7219731, May 22, 2007

Jun 22, 2005

11/159023

Philip F. Sullivan - Bellaire TX, US
J Ernest Brown - Katy TX, US
Jesse C. Lee - Sugar Land TX, US
Golchehreh Salamat - Sugar Land TX, US

Schlumberger Technology Corporation - Sugar Land TX

E21B 43/04
E21B 43/22
E21B 43/267

166278, 1662801, 166283, 166300, 1663082, 1663083, 507260, 507265, 507267, 507269, 507902

A method is given for treating a subterranean formation penetrated by a wellbore with a viscosified fluid. The fluid contains a solid hydrolysable polyacid that upon dissolution and hydrolysis releases an acid that is a breaker for the viscosifying system. Suitable solid hydrolysable polyacids include polylactic acid and polyglycolic acid. The fluid also contains a pH control agent, present in an amount sufficient to neutralize any acid present in the solid hydrolysable polyacid before the injection and to neutralize any acid generated by the solid hydrolysable polyacid during the injection, so that the acid breaker is not available to break the fluid during the injection. In one embodiment the viscosifier is a viscoelastic surfactant fluid system and the solid hydrolysable polyacid is of a size selected to be a fluid loss additive, for example in fracturing or gravel packing. In another embodiment, the solid hydrolysable polyacid is used in particles sufficiently small that they enter the pores of the formation. In either case, the viscosifier is broken after the solid releases more acid than can be neutralized by the pH control agent.

7299870, Nov 27, 2007

Dec 1, 2005

11/292029

Marieliz Garcia-Lopez De Victoria - Houston TX, US
Yenny Christanti - Houston TX, US
Golchehreh Salamat - Sugar Land TX, US
Zhijun Xiao - Sugar Land TX, US
Bernhard Lungwitz - Houston TX, US

Schlumberger Technology Corporation - Sugar Land TX

E21B 43/25

166279, 166282, 166307

A method is described for treating a subterranean formation with a low viscosity fluid system that contains a surfactant or mixture of surfactants that does not divert fluid flow in the formation, but that develops the ability to divert flow as the fluid flows through the formation. The fluid optionally contains a formation-dissolving agent. The fluid is used in matrix acidizing, acid fracturing, and diversion.

7304019, Dec 4, 2007

May 31, 2006

11/421236

Lijun Lin - Stafford TX, US
Alejandro Pena - Ciudad Ojeda, VE
Golchehreh Salamat - Sugar Land TX, US
Michael D. Parris - Richmond TX, US
Geoff Robinson - Spring TX, US

Schlumberger Technology Corporation - Sugarland TX

C09K 8/34
C09K 8/94

507115, 507110, 507112, 507113, 507114, 507136, 507211, 507214, 507215, 507216, 507217, 507261

Suspensions are provided of water-soluble materials in non-aqueous carrier fluids using suspension agents that include organophilic clays. Methods of forming such suspensions are provided. Methods are also provided for using such suspensions to prepare aqueous solutions, in particular thickened aqueous solutions, in particular for use in oilfield treatments.

7398826, Jul 15, 2008

Dec 21, 2005

11/316021

Ann M. W. Hoefer - Houston TX, US
Philip F. Sullivan - Bellaire TX, US
Golchehreh Salamat - Sugar Land TX, US
Curtis L. Boney - Houston TX, US
Jesse C. Lee - Paris, FR
Yiyan Chen - Richmond TX, US
Dean M. Willberg - Moscow, RU
Marina Bulova - Moscow, RU
Christopher N. Fredd - Missouri City TX, US
Belgin Baser - Houston TX, US
Timothy L. Pope - Bucharest, RO

Schlumberger Technology Corporation - Sugar Land TX

E21B 43/267
E21B 43/22
E21B 21/00
C09K 8/80
C09K 8/035

1662801, 166283, 166300, 166302, 1663082, 175 72, 507124, 507132, 507230, 507245

Well treatment is disclosed that includes injecting a well treatment fluid with insoluble polyol polymer such as polyvinyl alcohol (PVOH) dispersed therein, depositing the insoluble polymer in the wellbore or an adjacent formation, and thereafter dissolving the polymer by reducing salinity and/or increasing temperature conditions in the environment of the polymer deposit. The method is disclosed for filter cake formation, fluid loss control, drilling, hydraulic fracturing and fiber assisted transport, where removal of the polyol at the end of treatment or after treatment is desired. The method is also disclosed for providing dissolved polyol as a delayed breaker in crosslinked polymer viscosified systems and viscoelastic surfactant systems. Also disclosed are well treatment fluids containing insoluble amorphous or at least partially crystalline polyol, and a PVOH fiber composition wherein the fibers are stabilized from dissolution by salinity.

7419004, Sep 2, 2008

Dec 30, 2003

10/707658

Golchehreh Salamat - Sugar Land TX, US

Schlumberger Technology Corporation - Sugar Land TX

E21B 43/04

166278, 166 51

A method is disclosed for gravel packing a hole in a subterranean formation including the step of pumping into the hole a gravel pack composition comprising gravel and a carrier fluid comprising a brine-in-oil emulsion, said emulsion being stabilized by an emulsifier based on at least one sorbitan fatty acid ester presenting a shoulder peak before the peak depicted to be the monomer peak when analyzed by gel permeation chromatography. The emulsifiers that exhibit the shoulder exhibit good stability without causing formation damage.

7494957, Feb 24, 2009

Jan 24, 2005

11/042215

Alejandro Pena - Houston TX, US
Golchehreh Salamat - Sugar Land TX, US
Lijun Lin - Stafford TX, US

Schlumberger Technology Corporation - Sugar Land TX

C09K 8/035
C09K 8/20
E21B 43/25

507211, 507240, 507244, 507246, 507248, 1662441

The present invention relates to novel aqueous wellbore treatment fluids containing a gas component, a heteropolysaccharide, an electrolyte, and a surfactant, wherein the fluids may further include an organoamino compound. The fluids exhibit good rheological properties at elevated temperatures. Methods of use of fluids comprising at least an aqueous medium, a gas component, a heteropolysaccharide and a surfactant for hydraulically fracturing, well cleanup and gravel packing operations, are also disclosed.