Assembly and process for drilling and completing m

专利名称：Assembly and process for drilling and

completing multiple wells

发明人：Gary J. Collins,Kevin O. Trahan,John Lindley

Baugh

申请号：US08/548565申请日：19951026公开号：US05685373A公开日：19971111

摘要：An apparatus and process are provided for drilling and completing multiplesubterranean wells from a template which is secured within a cased well bore extendingto the surface. An orienting cam having a bore therethrough is positioned above thetemplate such that the bore through the orienting cam is automatically aligned with oneof at least two bores through the template. Fluid tight seals are provided between theorienting cam and the casing and between the orienting cam and one of the at least twobores through the template. Thereafter, a drill string including a drill bit is lowered fromthe surface of the earth through the casing, the bore through the orienting cam and theone bore through said template to drill a first subterranean well bore. Drilling fluid andcuttings resulting from drilling a subterranean formation are circulated back to thesurface via first subterranean well bore, one of the at least two bores through thetemplate and the bore through the orienting cam and through the casing such that thedrilling mud contacts the internal wall of the casing. The orienting cam is repositionedabove the template such that the bore through the orienting cam is aligned with anotherof the at least two bores through the template. Thereafter, a second subterranean well

bore is drilled via another of the bores through the template in a manner similar to thatdescribed for the first well bore.

申请人：MARATHON OIL COMPANY

代理人：Jack L. Hummel,Jack E. Ebel

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