E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 15/04 (2006.01) E21B 7/08 (2006.01) E21B 23/00 (2006.01) E21B 23/12 (2006.01) E21B 43/01 (2006.01)
Patent
CA 2299398
An apparatus (10) and process are provided for drilling and completing multiple subterranean wells from a template which is secured within a cased well bore extending to the surface. An orienting cam having a bore (20) therethrough is positioned above the template such that the bore through the orienting cam is automatically aligned with one of at least two bores through the template. Fluid tight seals are provided between the orienting cam and the casing and between the orienting cam and one of the at least two bores through the template. Thereafter, a drill string including a drill bit is lowered from the surface of the earth through the casing, the bore through the orienting cam and the one bore through said template to drill a first subterranean well bore.
L'invention concerne un appareil (10) et un procédé utiles pour forer et compléter de multiples puits souterrains à partir d'un modèle qui est fixé à l'intérieur d'un trou de forage tubé s'étendant vers la surface. Une came d'orientation comportant un orifice (20) traversant est placée au-dessus du modèle, de sorte que l'orifice traversant la came est aligné automatiquement sur l'un des deux orifices au moins qui traversent le modèle. Des joints étanches aux fluides sont prévus entre la came d'orientation et le tubage, et entre la came d'orientation et l'un des deux orifices au moins qui traversent le modèle. Ensuite, un train de tiges comportant un trépan de forage est descendu de la surface de la terre par le tubage, par l'orifice traversant la came d'orientation et l'un des orifices dudit modèle pour forer un premier trou de forage souterrain.
Macrae & Co.
Marathon Oil Company
LandOfFree
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