Mills for wellbore operations

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 10/56 (2006.01) E21B 10/46 (2006.01) E21B 17/10 (2006.01) E21B 29/00 (2006.01) E21B 29/06 (2006.01)

Patent

CA 2361928

A wellbore mill (10) has been invented that, in certain aspects, has a body (12) having a top and a bottom and, optionally, a fluid flow channel (20) extending therethrough from top to bottom with, optionally, one or more fluid jetting ports (22) in fluid communication with the fluid flow channel, milling apparatus (21, 23, 26) on the body including a plurality of milling inserts (26, 28), each insert mechanically secured in a corresponding recess (25) in the body, said mechanical securement sufficient for effective milling in a wellbore. A wellbore milling method for milling an opening in a selected tubular of a tubular string in a wellbore has been invented that includes installing and using such a mill.

L'invention concerne une fraise (10) de forage comportant, dans certains modes de réalisation, un corps (12) doté d'une partie supérieure et d'un fond et éventuellement d'un conduit (20) d'écoulement fluide s'étendant de la partie supérieure au fond et comprenant éventuellement un ou plusieurs orifices (22) d'injection de fluides en communication fluide avec le conduit d'écoulement fluide. Le dispositif (21, 23, 26) de fraisage se trouvant sur le corps comprend plusieurs éléments rapportés (26, 28) de fraisage, chaque élément rapporté étant fixé de façon mécanique à un creux (25) correspondant dans le corps, cette fixation mécanique étant suffisante pour effectuer un fraisage dans un puits de forage. L'invention concerne également un procédé de fraisage d'un forage permettant de fraiser une ouverture dans une tubulure sélectionnée d'un train de tubulures se trouvant dans un puits de forage, le procédé consistant à installer et à utiliser cette fraise.

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