Wellbore fluids for casing drilling

Details Wellbore fluids for casing drilling Wellbore fluids for casing drilling

E - Fixed Constructions

21

B

E21B 7/20 (2006.01) C09K 8/03 (2006.01) C09K 8/05 (2006.01) C09K 8/36 (2006.01) E21B 21/14 (2006.01)

Patent

CA 2617155

A method of drilling a subterranean hole that includes mixing a base fluid and a micronized weighting agent having a particle size d90 of less than about 50 microns to form a wellbore fluid; providing a drilling assembly that includes a casing as at least a portion of a drill string; and a drill bit attached at the distal end of the drill string; and drilling said subterranean hole with the drilling assembly using the wellbore fluid is disclosed.

Méthode de forage d'un puits souterrain comprenant le mélange d'un fluide de base et d'un agent de charge micronisé dont la grosseur des particules (d90) est de moins de 50 microns environ, afin de former un liquide de puits; l'invention prévoit la fourniture d'un dispositif de forage comprenant une enveloppe et au moins une partie d'un train de tiges de forage, ainsi qu'un trépan fixé à l'extrémité distale du train de tiges; l'invention décrit le forage dudit puits souterrain avec le dispositif de forage à l'aide du liquide de puits.

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