E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 33/13 (2006.01) C04B 28/04 (2006.01) C04B 38/02 (2006.01) C09K 8/46 (2006.01)
Patent
CA 2486570
The present invention provides improved methods of generating gas in and foaming a cement composition introduced into a subterranean zone penetrated by a well bore. The methods basically comprise the steps of providing and pumping a well cement composition containing an oxidizing agent into the subterranean zone by way of the well bore with one or more cement pumps. At the same time, providing and pumping an aqueous solution or dispersion containing a gas generating chemical and a mixture of surfactants into the well cement composition downstream of the pumps so that gas is generated and the cement composition is foamed.
la présente invention concerne des procédés améliorés de production de gaz dans des compositions de ciment et de gonflement de telles compositions introduites dans une zone souterraine dans laquelle pénètre un puits de forage. Fondamentalement, ces procédés consistent à injecter une composition de ciment pour puits renfermant un agent oxydant dans une zone souterraine via un puits de forage, ceci au moyen d'un ou de plusieurs pompes à ciment. Parallèlement, on injecte par pompage une solution aqueuse ou une dispersion renfermant un produit chimique générateur de gaz et un mélange de tensioactifs dans la composition de ciment en aval des pompes de manière à générer du gaz et à faire gonfler la composition de ciment.
Cromwell Roger S.
Luke Karen
Reddy B. Raghava
Waugh Bryan K.
Halliburton Energy Services Inc.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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