E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 43/30 (2006.01) E21B 7/04 (2006.01) E21B 21/08 (2006.01) E21B 21/14 (2006.01) E21B 43/00 (2006.01) E21F 7/00 (2006.01) E21B 47/09 (2006.01)
Patent
CA 2503516
A method for circulating drilling fluid in a well system includes drilling a substantially vertical well bore (12) from a surface (14) to a subterranean zone (15) and drilling an articulated well bore (30) from the surface to the subterranean zone. The articulated well bore is horizontally offset from the substantially vertical well bore at the surface and intersects the substantially vertical well bore at a junction proximate the subterranean zone. The method includes drilling a drainage bore (50) from the junction into the subterranean zone and pumping a drilling fluid through the drill string when drilling the drainage bore. The method also includes providing fluid down the substantially vertical well bore through a tubing. A fluid mixture returns up the substantially vertical well bore outside of the tubing. The fluid mixture comprises the drilling fluid after the drilling fluid exits the drill string.
Un procédé de circulation de fluide de forage dans un système de puits, consiste à forer un puits sensiblement vertical (12) depuis une surface (14) jusqu'à une zone souterraine (15) et à forer un puits articulé (30) depuis la surface jusqu'à une zone souterraine. Le puits articulé est décalé horizontalement par rapport au puits sensiblement vertical, à la surface, et croise le puits sensiblement vertical au niveau d'une jonction, à proximité de la zone souterraine. Ledit procédé consiste à forer un puits de drainage (50) depuis la jonction jusque dans la zone souterraine et à envoyer par pompage un fluide dans le train de tiges, lors du forage du trou de drainage. Ce procédé consiste aussi à envoyer un fluide dans le puits sensiblement vertical, par un tube. Un mélange fluide remonte le puits sensiblement vertical à l'extérieur du tube. Le mélange fluide comprend le fluide de forage après qu'il soit sorti du train de tiges.
Cdx Gas Llc
Kirby Eades Gale Baker
LandOfFree
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