Patents by Inventor Hafida Achtal

Hafida Achtal has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • COMPOSITIONS AND METHODS FOR COMPLETING SUBTERRANEAN WELLS
    Publication number: 20170107420
    Abstract: Hydroxyethylcellulose (HEG) may be used to provide fluid-loss control in well-cement slurries HECs that have a molecular weight above 600,000, a degree of substitution higher than 1.9 and a molar substitution above 2.0 are particularly useful in that they not only provide fluid-loss control, but also may be used as a cement extender. Furthermore, the retardation effect may be reduced.
    Type: Application
    Filed: March 31, 2015
    Publication date: April 20, 2017
    Inventors: Cyril Terrier, Isabelle Couillet, Hafida Achtal
  • Compositions and methods for well cementing
    Patent number: 9394202
    Abstract: Organic compounds containing at least one nitrogen atom are particularly suitable as retarders for geopolymeric systems employed as well cements. Preferred compounds include aminated polymers, amine phosphonates, quaternary ammonium compounds and tertiary amines. The geopolymeric compositions are suitable for primary cementing and remedial cementing operations. The preferred temperature range within which the retarders operate is between about 20° C. and 120° C.
    Type: Grant
    Filed: April 28, 2011
    Date of Patent: July 19, 2016
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Olivier Porcherie, Elena Pershikova, Nigel Evans, Hafida Achtal, Yamina Boubeguira, Benedicte Ayache-Zusatz
  • Pumpable geopolymers comprising a mixing aid and dispersing agent
    Patent number: 9222010
    Abstract: The invention concerns the use of a carbohydrate-based compound as a mixing aid and dispersing agent in a pumpable geopolymeric suspension for oil and/or gas industry applications, said suspension further comprising an aluminosilicate source, a carrier fluid, and an activator, and method for placing such a suspension in a borehole. In particular, the suspension according to the invention is used for well primary cementing operations and/or remedial applications.
    Type: Grant
    Filed: November 10, 2010
    Date of Patent: December 29, 2015
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Olivier Porcherie, Elena Pershikova, Gaetan Rimmele, Hafida Achtal, Yamina Boubeguira
  • Pumpable geopolymers comprising a setting accelerator
    Patent number: 9206343
    Abstract: A carbohydrate-based compound is used as a setting accelerator in a pumpable geopolymeric suspension for oil and/or gas industry applications. The suspension further comprises an aluminosilicate source, a carrier fluid, and an activator. The suspensions may be placed in a subterranean well and used for well primary cementing operations and/or remedial applications.
    Type: Grant
    Filed: November 10, 2010
    Date of Patent: December 8, 2015
    Assignee: Schlumberger Technology Corporation
    Inventors: Elena Pershikova, Olivier Porcherie, Slaheddine Kefi, Yamina Boubeguira, Hafida Achtal
  • Pumpable geopolymers comprising a fluid-loss agent
    Patent number: 8535437
    Abstract: The invention concerns the use of a fluid loss control additive in a pumpable geopolymeric suspension for oil and/or gas industry applications, said suspension further comprising an aluminosilicate source, a carrier fluid, and an activator, and method of providing such a suspension in a borehole. In particular, the suspension according to the invention is used for well primary cementing operations and/or remedial applications.
    Type: Grant
    Filed: November 10, 2010
    Date of Patent: September 17, 2013
    Assignee: Schlumberger Technology Corporation
    Inventors: Elena Pershikova, Olivier Porcherie, Slaheddine Kefi, Yamina Boubeguira, Hafida Achtal
  • Pumpable Geopolymers Comprising A Mixing Aid and Dispersing Agent
    Publication number: 20120318175
    Abstract: The invention concerns the use of a carbohydrate-based compound as a mixing aid and dispersing agent in a pumpable geopolymeric suspension for oil and/or gas industry applications, said suspension further comprising an aluminosilicate source, a carrier fluid, and an activator, and method for placing such a suspension in a borehole. In particular, the suspension according to the invention is used for well primary cementing operations and/or remedial applications.
    Type: Application
    Filed: November 10, 2010
    Publication date: December 20, 2012
    Inventors: Olivier Porcherie, Elena Pershikova, Gaetan Rimmele, Hafida Achtal, Yamina Boubeguira
  • Pumpable Geopolymers Comprising A Setting Accelerator
    Publication number: 20120267106
    Abstract: The invention concerns the use of a carbohydrate-based compound as a setting accelerator in a pumpable geopolymeric suspension for oil and/or gas industry applications, said suspension further comprising ‘an aluminosilicate source, a carrier fluid, and an activator, and methods of preparing such suspensions. In particular, the suspension according to the invention is used for well primary cementing operations and/or remedial applications.
    Type: Application
    Filed: November 10, 2010
    Publication date: October 25, 2012
    Inventors: Elena Pershikova, Olivier Porcherie, Slaheddine Kefi, Yamina Boubeguira, Hafida Achtal
  • Pumpable Geopolymers Comprising A Fluid-Loss Agent
    Publication number: 20120260829
    Abstract: The invention concerns the use of a fluid loss control additive in a pumpable geopolymeric suspension for oil and/or gas industry applications, said suspension further comprising an aluminosilicate source, a carrier fluid, and an activator, and method of providing such a suspension in a borehole. In particular, the suspension according to the invention is used for well primary cementing operations and/or remedial applications.
    Type: Application
    Filed: November 10, 2010
    Publication date: October 18, 2012
    Inventors: Elena Pershikova, Olivier Porcherie, Slaheddine Kefi, Yamina Boubeguira, Hafida Achtal
  • COMPOSITIONS AND METHODS FOR WELL CEMENTING
    Publication number: 20110284223
    Abstract: Organic compounds containing at least one nitrogen atom are particularly suitable as retarders for geopolymeric systems employed as well cements. Preferred compounds include aminated polymers, amine phosphonates, quaternary ammonium compounds and tertiary amines. The geopolymeric compositions are suitable for primary cementing and remedial cementing operations. The preferred temperature range within which the retarders operate is between about 20° C. and 120° C.
    Type: Application
    Filed: April 28, 2011
    Publication date: November 24, 2011
    Applicant: Schlumberger Technology Corporation
    Inventors: Olivier Porcherie, Elena Pershikova, Nigel Evans, Hafida Achtal, Yamina Boubeguira, Benedicte Ayache-Zusatz