E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 17/00 (2006.01) E21B 17/04 (2006.01) E21D 3/00 (2006.01)
Patent
CA 2486108
The present invention relates to a safety arrangement which pertains to drill bits for reamer drilling and which is intended to prevent the drill bit (1) from falling freely down the hole in the event of a breakage in an element (3) that connects the drill bit (1) with an overlying rotatable carrier element, said element forming part of a drill string that carries the drill bit (1), wherein the element (3) includes a longitudinal hole (6) that extends internally along at least a part of the length of said element (3), and wherein the hole has disposed therein a safety device (5) which functions to capture the element and therewith also the drill bit (1) should the element (3) break, said capture being achieved by virtue of the safety device (5) being connected to a threaded part (4) of the overlying element (3) and also to a part of said element (3) located at a distance from said threaded part (4) of the element.
L'invention concerne un système de sécurité relatif à des outils de forage destinés à forer un alésage et servant à empêcher que l'outil de forage (1) ne tombe dans le trou en cas de cassure d'un élément (3) qui relie l'outil de forage (1) à un élément support rotatif sus-jacent, cet élément formant une partie de train de tiges de forage qui supporte l'outil de forage (1). L'élément (3) comprend un trou longitudinal (6) s'étendant vers l'intérieur le long d'au moins une partie de la longueur de l'élément (3), et un dispositif de sécurité (5) logé dans ce trou, ce dernier fonctionnant de manière à capturer l'élément ainsi que l'outil de forage (1) si l'élément (3) se casse, la capture étant réalisée grâce au dispositif de sécurité (5) relié à la partie filetée (4) de l'élément sus-jacent (3) et également à une partie de cet élément (3) située à une certaine distance de la partie filetée (4) de l'élément.
Atlas Copco Secoroc Ab
Kirby Eades Gale Baker
LandOfFree
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