Long gauge roller vane drilling motor

Details Long gauge roller vane drilling motor Long gauge roller vane drilling motor

E - Fixed Constructions

21

B

E21B 4/02 (2006.01) E21B 7/06 (2006.01) E21B 17/10 (2006.01)

Patent

CA 2396532

A single-jacket roller vane drilling motor for downhole deviated and horizontal drilling has its jacket (9) provided at its circumgerence with one or more curved members (10) in such a way that a new, larger circular outside surface (11) is created with a diameter approximately equal to that of the drill bit below, and whereby one or more longitudinal recesses (7') are created for passage of the drilling fluid back to the surface. The curved members (10) may start below the lower end of the motor or at its lower end and may or may not extend to its upper end.

L'invention concerne un moteur de forage à palettes et à rouleaux à une enveloppe pour le forage fond de trou horizontal et dévié. L'enveloppe (9) du moteur selon l'invention comporte sur sa circonférence un ou plusieurs éléments courbes (10) de façon à créer une nouvelle surface externe circulaire plus grande (11) ayant un diamètre à peu près égal à celui du trépan en dessous, un ou plusieurs évidements longitudinaux (7') étant ménagés pour la remontée du fluide de forage à la surface. Les éléments courbes (10) peuvent commencer en dessous de l'extrémité inférieure du moteur ou à son extrémité inférieure et peuvent ou non s'étendre jusqu'à son extrémité supérieure.

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