E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 33/03 (2006.01)
Patent
CA 2696904
A well drilling head comprises a housing and a bearing assembly. The housing has a sidewall structure defining a central bore. A tapered bearing assembly seating surface is provided within the central bore of the housing. The bearing assembly includes an outer barrel having a central bore, an inner barrel at least partially disposed within the central bore of the outer barrel and bearing units coupled between the barrels for providing concentric alignment of the barrels and allowing rotation therebetween. The outer barrel is removably seated within the central bore of the housing. A tapered exterior surface of the outer barrel is engaged with the tapered bearing assembly seating surface of the housing whereby engagement of the tapered surfaces align the outer barrel with respect to the central bore of the housing.
L'invention concerne une tête de forage de puits qui comprend un logement et un ensemble palier. Le logement possède une structure latérale définissant un trou central. Une surface portante d'ensemble palier tronconique est formée à l'intérieur du trou central du logement. L'ensemble palier comporte un cylindre externe ayant un trou central, un cylindre interne au moins partiellement disposé à l'intérieur du trou central du cylindre externe et des unités portantes couplées entre les cylindres pour produire un alignement concentrique des cylindres et faciliter la rotation entre eux. Le cylindre externe est posé amovible à l'intérieur du trou central du logement. Une surface extérieure tronconique du cylindre externe est en prise avec la surface portante d'ensemble palier tronconique du logement, le contact des surfaces tronconiques alignant ainsi le cylindre externe par rapport au trou central du logement.
Borden Ladner Gervais Llp
Hampton Ip Holdings Co. Llc
Williams John R.
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