Method and system for drilling well bores

Details Method and system for drilling well bores Method and system for drilling well bores

E - Fixed Constructions

21

B

E21B 7/00 (2006.01) C09K 8/02 (2006.01) E21B 7/04 (2006.01) E21B 21/00 (2006.01) E21B 33/138 (2006.01) E21B 37/00 (2006.01)

Patent

CA 2610622

A system and method for drilling a substantially horizontal well bore 44 in a normally to sub-normally pressured formation 30. The normally to sub-normally pressured formation is an unconventional reservoir 30. The well bore is drilled over-balanced with a drilling fluid having a density at least about the density of the cuttings produced by drilling the well bore.

Cette invention concerne un système et un procédé permettant de forer un puits de forage (44) substantiellement horizontal dans une formation à pression normale à subnormale (30). La formation à pression normale à subnormale est un réservoir non conventionnel (30). Le puits de forage est foré en surpression à l'aide d'un fluide de forage dont la densité est au moins environ égale à celle des déblais de forage résultant du forage du puits de forage.

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