Mechanically modified filter cake

Details Mechanically modified filter cake Mechanically modified filter cake

E - Fixed Constructions

21

B

E21B 10/00 (2006.01) E21B 3/00 (2006.01)

Patent

CA 2624432

A down hole tool including a compression surface, a compression surface axis, and at least one extendable support member configured to attach the compression surface to a well drilling tool assembly, wherein the extendable support member is extendable by an extension force provided to the support member. The down hole tool is rotable relative to an axis of the well drilling tool assembly, and as the well drilling tool assembly rotates, the at least one compression device exerts a lateral force along a sidewall of a wellbore. Also, a method of forming filter cake comprising releasing a drilling fluid and contacting the drilling fluid with a mechanical pressure on the sidewall of the wellbore and the drilling fluid.

La présente invention a trait à un outil de fond de trou comportant une surface de compression, un axe de surface de compression, et au moins un organe de support extensible configuré pour la fixation de la surface de compression à un ensemble d'outil de forage de puits, l'organe de support extensible étant extensible par une force d'extension fournie à l'organe de support. L'outil de fond de trou est apte à être entraîné en rotation par rapport à un axe de l'ensemble d'outils de forage de puits, et au fur et à mesure de la rotation de l'ensemble d'outil de forage de puits, ledit au moins un dispositif de compression exerce une force latérale le long d'une paroi d'un trou de forage. L'invention a également trait à un procédé de formation de gâteau de filtration comprenant la libération d'un fluide de forage et la mise en contact du fluide de forage avec une pression mécanique sur la paroi du trou de forage et le fluide de forage.

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