E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 10/64 (2006.01) E21B 25/02 (2006.01)
Patent
CA 2673317
The invention relates to a locking device for a drilling device including a locking body that is mountable in an outer tube, an unlocking tube that is slidingly mountable about the locking body, two catches attached to the locking body and pivotable between an extended position, in which the catch engages with the outer tube in order to lock the locking body to said outer tube, and a retracted position for unlocking the locking body from the outer tube, a piston sliding around the locking body and rigidly connected to the unlocking tube, and a compression-spring mechanism pressing the piston towards the catches in order to retain said catches in the extended position thereof, a pull exerted on the unlocking tube compressing the spring mechanism to prevent the piston from pressing against the catches which are positioned in the retracted position thereof.
Dispositif de verrouillage pour un dispositif de forage comprenant un corps de verrouillage montable dans un tube extérieur, un tube de déverrouillage montable autour du corps de verrouillage de manière coulissante, deux loquets fixés sur le corps de verrouillage et aptes à pivoter entre une position déployée dans laquelle le loquet coopère avec le tube extérieur afin de verrouiller le corps de verrouillage audit tube extérieur et une position rentrée pour déverrouiller le corps de verrouillage du tube extérieur, un piston coulissant autour du corps de verrouillage et solidaire du tube de déverrouillage, et un mécanisme à ressort à pression pressant le piston vers les loquets afin de les maintenir dans leur position déployée, une traction exercée sur le tube de déverrouillage comprimant le mécanisme à ressort pour empêcher le piston de presser sur les loquets qui se positionnent dans leur position rentrée.
Fasken Martineau Dumoulin Llp
Les Entreprises Parlec Ltee
LandOfFree
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