E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 3/00 (2006.01) E21B 33/12 (2006.01) E21B 33/129 (2006.01)
Patent
CA 2094793
A downhole tool apparatus and methods of drilling the apparatus. The apparatus may include, but is not limited to, packers and bridge plugs utilizing non-metallic slip components. The non-metallic material may include engineering grade plastics. In one embodiment, the slips are separate and held in place in an initial position around the slip wedge by a retainer ring. In another embodiment, the slips are integrally formed with a ring portion which holds the slips in the initial position around the wedge; in this embodiment, the ring portion is made of a fracturable non-metallic material which fractures during a setting operation to separate the slips. Methods of drilling out the apparatus without significant variations in the drilling speed and weight applied to the drill bit may be employed. Alternative drill bit types, such as polycrystalline diamond compact (PDC) bits may also be used.
Dispositif pour outil de fond de trou et procédés de forage à travers ledit dispositif. Le dispositif selon cette invention peut comporter des garnitures d'étanchéité et des bouchons à coins en matériaux non métalliques, par exemple des plastiques industriels, mais cette description n'est pas limitative. Dans une variante de cette invention, les coins sont séparés et maintenus dans la position initiale par un anneau. Dans une autre variante, ils font partie intégrante de l'anneau. Dans cette dernière variante, l'anneau est fabriqué en matériau non métallique susceptible de se casser au moment voulu de manière que les coins se séparent. Des procédés spéciaux permettent de forer à travers ledit dispositif sans ralentissement de la vitesse de forage ni augmentation de la pression appliquée sur l'outil de forage. Différents outils de forage peuvent être utilisés, notamment des outils à diamants polycristallins.
Berscheidt Kevin T.
Hushbeck Donald F.
Jacobi Rick D.
Streich Steven G.
Company Halliburton
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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