Thermoplastic cellulosic fiber blends as lost circulation...

Details Thermoplastic cellulosic fiber blends as lost circulation... Thermoplastic cellulosic fiber blends as lost circulation...

E - Fixed Constructions

21

B

E21B 33/13 (2006.01) C09K 8/035 (2006.01) C09K 8/516 (2006.01) E21B 21/00 (2006.01)

Patent

CA 2734032

A method is disclosed for reducing lost circulation in drilling wells, employing composite materials as lost circula-tion materials. The composites comprise a thermoplastic polymer and cellulosic fibers. Optionally the composites may include other components such as calcium carbonate, clay, oil and other blending agents.

L'invention porte sur un procédé pour la réduction de la perte de circulation dans des puits de forage, employant des matières composites comme matières pour la perte de circulation. Les composites comprennent un polymère thermoplastique et des fibres cellulosiques. Facultativement, les composites peuvent comprendre d'autres composants tels que du carbonate de calcium, de l'argile, de l'huile et d'autres agents de mélange.

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