E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 17/06 (2006.01) E21B 4/02 (2006.01)
Patent
CA 2434764
The invention relates to a downhole tool including a selectively releasable joint, a downhole drilling assembly including the downhole tool, and to a corresponding method. In one embodiment of the invention, a downhole drilling assembly (10) includes a downhole tool (12) having a first body (20, 22) and a second body (26) mounted for relative rotation; a joint part (24) for use in forming a selectively releasable joint between the second body (26) and a part (16) of the assembly coupled to the second body (26); and locking means (34) for locking the first and second bodies (20, 22; 26) relative to one another against relative rotation so as to allow a release force to be applied through the first body (20, 22) to release the releasable joint (24) and allow the tool (12) to be separated from the part (16) of the assembly (10).
L'invention concerne un outil de fond comprenant un joint sélectivement libérable, un ensemble de forage de fond de trou équipé dudit outil de fond ainsi qu'un procédé correspondant. Dans un mode de réalisation de cette invention, un ensemble de forage de fond de trou (10) comprend un outil de fond (12), qui présente un premier corps (20, 22) et un second corps (26) montés de manière à permettre une rotation relative, un joint (24) à utiliser pour former un joint sélectivement libérable entre le second corps (26) et une partie (16) dudit ensemble relié au second corps (26) ainsi qu'un moyen de blocage (34) conçu pour bloquer les premier et second corps (20, 22 ; 26) l'un par rapport à l'autre contre toute rotation relative. Ainsi, une force de libération appliquée à travers le premier corps (20, 22) peut libérer le joint libérable (24) et l'outil (12) peut se séparer de ladite partie (16) de l'ensemble (10).
Downie Andrew Mcpherson
Powell Roy
Scott Edward Docherty
Sim & Mcburney
Smith International Inc.
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