Vortex chamber mud pulser

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 47/12 (2006.01) E21B 47/18 (2006.01) F15C 1/16 (2006.01) G10K 15/04 (2006.01)

Patent

CA 2190749

A vortex chamber fluid pulser (44) selectively produces pressure pulses in fluid flowing therethrough by the alternating insertion and retraction of a flow-disrupting tab (102) into and out of an annular vortex chamber (105) having an inlet (88) and a pair of opposed axial outlets (92, 94). Insertion of the tab disrupts the normally radial flow of fluid through the chamber and outlets causing the flow to become vortical; retraction of the tab causes a second pressure pulse as the flow returns to radial, sending a sequence of pressure pulses capable of carrying encoded signals to a transducer (45) remotely located in the fluid.

Un générateur (44) d'impulsions de pression de liquide à chambre de tourbillons produit sélectivement des impulsions de pression dans un liquide qui le traverse par l'introduction et le retrait d'une languette (102) de rupture d'écoulement dans et à l'extérieur d'une chambre de tourbillons annulaire (105) possédant une entrée (88) et une paire de sorties axiales opposées (92, 94). L'introduction de la languette rompt l'écoulement radial normal du liquide à travers la chambre et les sorties et, de ce fait, l'écoulement devient tourbillonnaire; le retrait de la languette provoque une deuxième impulsion de pression simultanément au retour de l'écoulement dans un sens radial, ce qui envoie une séquence d'impulsions de pression pouvant porter des signaux codés vers un détecteur (45) situé à distance dans le liquide.

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