Downhole draw down pump and method

Details Downhole draw down pump and method Downhole draw down pump and method

E - Fixed Constructions

21

B

E21B 17/18 (2006.01) E21B 43/00 (2006.01) E21B 43/12 (2006.01)

Patent

CA 2537855

An apparatus for drawing a fluid level in a wellbore. The apparatus comprises a first tubular disposed within the wellbore so that a wellbore annulus is formed. The apparatus further includes an annular nozzle operatively attached to the first tubular, and wherein the annular nozzle comprises: an annular adapter, and, a suction tube that extends from the annular member into an inner portion of the first tubular. The apparatus further comprises a second tubular concentrically disposed within the first tubular so that a micro annulus is formed therein. The apparatus may further contain a jetting device for delivering an injected medium injected from the micro annulus into the wellbore annulus, and a stabilizer that stabilizes the second tubular with the first tubular. A method of drawing down a fluid level is also disclosed.

L'invention concerne un appareil servant à abaisser un niveau de fluide dans un puits de forage. Cet appareil comprend un premier élément tubulaire disposé à l'intérieur du puits de forage de façon à former un espace annulaire. Il comprend par ailleurs une buse annulaire fonctionnellement reliée au premier élément tubulaire, cette buse annulaire comprenant un adaptateur annulaire et un tube d'aspiration s'étendant de cet adaptateur annulaire à une partie interne du premier élément tubulaire. L'appareil selon l'invention comprend en outre un second élément tubulaire disposé concentriquement à l'intérieur du premier élément tubulaire de façon à former un micro-espace annulaire entre ces deux éléments. Il peut comporter également un dispositif à jets servant à distribuer un agent injecté du micro-espace annulaire à l'espace annulaire du puits de forage, ainsi qu'un stabilisateur destiné à stabiliser le second élément tubulaire à l'intérieur du premier. L'invention concerne également un procédé pour abaisser un niveau de fluide.

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