Downhole machining of well completion equipment

Details Downhole machining of well completion equipment Downhole machining of well completion equipment

E - Fixed Constructions

21

B

E21B 29/00 (2006.01) E21B 23/02 (2006.01) E21B 29/02 (2006.01) E21B 43/10 (2006.01) E21B 43/11 (2006.01) E21B 43/112 (2006.01) E21B 43/114 (2006.01)

Patent

CA 2423000

The present invention relates to a method for completing a subterranean wellbore comprises the steps of (a) providing a workpiece that comprises (1) a first section that comprises a first material, and (2) a second section that comprises a second material, the second section forming at least one surface of the workpiece; (b) placing the workpiece in the subterranean wellbore; and (c) machining the workpiece to remove at least part of the second material in the second section, whereby at least one surface of the workpiece is formed into a desired configuration. The invention provides also a downhole assembly suitable for such a downhole machining. This method allows, for example, a landing nipple to be installed in a wellbore, and customized locking recesses to be formed in the inner surface of the nipple at a later time.

Cette invention a trait à un procédé de conditionnement de puits de forage, consistant, (a), à créer une pièce à travailler comprenant, (1), un premier élément renfermant un premier matériau et, (2), un second élément renfermant un second matériau, ce second élément constituant au moins une face de la pièce à travailler, (b), à placer cette pièce dans le puits de forage souterrain et, (c), à l'usiner afin d'enlever au moins une partie du second matériau du second élément. De ce fait, une face au moins de cette pièce est d'une configuration souhaitée. Cette invention porte également sur un ensemble de fond se prêtant à un usinage en conditions de fond. Ce procédé permet, par exemple, de mettre en place un raccord à portée intérieure dans un puits de forage et d'adapter ultérieurement des encoches de fixation dans la face interne dudit raccord.

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