E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 33/13 (2006.01) C04B 20/00 (2006.01) C04B 28/06 (2006.01) C09K 8/46 (2006.01)
Patent
CA 2207885
The present invention concerns a cementing composition for an oil (or similar) well, based on an aluminous hydraulic cement, fine particles, hollow microspheres, water in a quantity such that the porosity is in the range 25% to 50%, a dispersing agent, a setting accelerator for the aluminous cement and optionally, other conventional additives. The invention is of particular application to cementing conductor pipes in arctic zones or in deep-water wells.
La présente invention a trait à une composition de cimentation pour un puits de pétrole (ou un puits similaire), à base de ciment hydraulique alumineux, de particules fines, de microsphères creuses, d'eau en quantité telle que la porosité soit de l'ordre de 25 % à 50 %, d'un agent dispersant, d'un accélérateur de prise pour le ciment alumineux et, facultativement, d'autres additifs classiques. L'invention est particulièrement utile lors de la cimentation des tubes conducteurs dans les régions arctiques ou dans les puits en eaux profondes.
Baret Jean-Francois
Dargaud Bernard
Michaux Michel
Villar John
Schlumberger Canada Limited
Smart & Biggar
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