E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 43/25 (2006.01) C09K 8/68 (2006.01)
Patent
CA 2242679
Methods and apparatus are disclosed for fracturing subterranean formations using fracturing fluids that are hydrated from dry mix blends. One aspect of the invention comprises a dry blended particulate composition for hydraulic fracturing comprising a particulate hydratable polysaccharide, a particulate crosslinking agent, and a slowly releasing particulate base. The compositions employ controlled release methods of particle dissolution. The invention reveals a dry blended particulate composition capable of significantly improved high temperature stability. Further, methods of fracturing and apparatus for rapidly hydrating and pumping the fracturing fluid into subterranean formations are disclosed.
Appareil et méthode de fracturation de formations souterraines au moyen de fluides qui ont été hydratés à partir de mélanges secs. Un des aspects de l'invention consiste à utiliser à des fins de fracturation hydraulique une composition de particules mélangées à sec; entrent dans cette composition de la polysaccharide hydratable, un agent de réticulation particulaire et une base particulaire à libération lente. L'invention décrit une composition particulaire mélangée à sec qui présente une stabilité sensiblement améliorée à température élevée. L'invention décrit en outre les méthodes de fracturation et l'appareil servant à hydrater rapidement et pomper le fluide de fracturation dans les formations souterraines.
Constien Vernon
Nelson Erik B.
Qiu Xiaoping
Sullivan Philip F.
Schlumberger Canada Limited
Smart & Biggar
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