Choke for controlling the flow of drilling mud

Details Choke for controlling the flow of drilling mud Choke for controlling the flow of drilling mud

E - Fixed Constructions

21

B

E21B 21/10 (2006.01) E21B 21/08 (2006.01)

Patent

CA 2491925

The invention relates to a drilling system and method for drilling a well bore into an earth formation, comprising:- drilling means for drilling a well bore;- pumping means for pumping drilling fluid into the well bore during drilling; and - a drilling fluid outlet system for retrieving drilling fluid from the well bore, said drilling fluid outlet system comprising choke means for choking the return flow of retrieved drilling fluid, and alternating means for alternating the flow direction through the choking means.

Cette invention porte sur un système de forage et sur un procédé de forage d'un puits de forage dans une formation terrestre. Ce système comprend : une unité de forage servant à forer un puits de forage ; une unité de pompage servant à pomper le fluide de forage dans le puits de forage pendant le forage ; et un système d'évacuation du fluide de forage servant à récupérer le fluide de forage du puits de forage, lequel système d'évacuation de fluide de forage comprend une duse servant à duser le débit de retour du fluide de forage ainsi qu'une unité d'alternance servant à alterner le sens d'écoulement dans la duse.

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