E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 17/06 (2006.01) E21B 17/04 (2006.01)
Patent
CA 2455165
The present invention relates to downhole apparatus permitting separation of one part of downhole equipment from another part thereof. The invention provides downhole apparatus (2) comprising a first part (4) connected to a second part (6) by connecting means which limits axial and rotational movement between said parts. The connecting means comprises a connecting member (22) having first and second ends connected respectively to the first and second parts (4, 6). The connection of the first and second ends of the connecting member (22) is such as to limit axial and rotational movement relative to the respective first and second parts (4, 6). The connecting member (22) is provided between said first and second ends with a region of weakness in the connecting member provided by weakening means (28), and with means for minimising stress generated in the connecting means at said region of weakness when torque is transmitted in use between the first and second parts (4, 6) via the connecting member (22).
L'invention concerne un appareil de fond permettant de séparer une partie de l'équipement de fond d'une autre partie de celui-ci. L'appareil de fond (2) selon l'invention comprend une première partie (4) reliée à une seconde partie (6) par des moyens de connexion limitant les mouvements axial et rotatif entre ces parties. Les moyens de connexion comprennent un élément de connexion (22) présentant des première et seconde extrémités reliées, respectivement, aux première et seconde parties (4, 6). La connexion des première et seconde extrémités de l'élément de connexion (22) est conçue de manière telle qu'elle limite les mouvements axial et rotatif par rapport aux première et seconde parties respectives (4, 6). L'élément de connexion (22) est placé entre les première et seconde extrémités, cet élément comprenant une région de faiblesse mise en place par des moyens de faiblesse (28), ainsi que des moyens permettant de minimiser la contrainte générée dans les moyens de connexion au niveau de ladite région au cours de la transmission de couple, pendant l'utilisation, entre les première et seconde parties (4, 6) via l'élément de connexion (22).
Gillies Ian Alexander
Mcgarian Bruce
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Smith International Inc.
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