Centralisers

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 17/10 (2006.01)

Patent

CA 2198619

A centraliser (1) comprises an upper ring (2) and a lower ring (3) connected by six rigid members (4). The centraliser (1) can be mounted on casing to be lowered down deviated bores. The rigid members (4) are designed to collapse under a lateral load of about 8 tonnes. Thus if, for example, part of the bore collapses and the casing has to be withdrawn the rigid members will collapse enabling the centraliser (1) to be recovered on the casing in one piece.

La présente invention concerne un centreur (1) constitué d'un anneau supérieur (2) et d'un anneau inférieur (3) reliés par six membres rigides (4). Le centreur (1) peut être monté sur un tubage qui doit être descendu dans des trous forés déviés. Les membres rigides (4) sont conçus pour s'effondrer sous la pression d'une charge latérale d'environ huit tonnes. Par conséquent, si, par exemple, une partie du trou foré s'effond et si le tubage doit être retiré, les membres rigides s'effrondreront ce qui permettra de récupérer le centreur (1) en un seul morceau sur le tubage.

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