The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 24, 2011
Filed:
Oct. 23, 2006
Jean-philippe Caritey, Clamart, FR;
Michel Michaux, Clamart, FR;
Tatiana Pyatina, Clamart, FR;
Frédéric Thery, Clamart, FR;
Jean-Philippe Caritey, Clamart, FR;
Michel Michaux, Clamart, FR;
Tatiana Pyatina, Clamart, FR;
Frédéric Thery, Clamart, FR;
Schlumberger Technology Corporation, Sugar Land, TX (US);
Abstract
The present invention provides a versatile additive for improving the properties of a cement slurry made with portland cement and to be utilized in well cementing, said versatile additive comprising type of silicates and/or borates that inhibit gelation occurring with the interstitial phase. The additive of the present invention improves significantly the rheology (i.e., strong dispersing effect) and can even overcome severe gelation problems. At temperature above about 88° C. (190° F.) the additive acts as retarder aid, enabling to reduce considerably the concentration of retarder required to achieve a given thickening time.