E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 47/18 (2006.01) E21B 41/00 (2006.01) G01V 11/00 (2006.01) H02K 7/18 (2006.01)
Patent
CA 2446357
The invention is directed to a device for the generation of pressure pulses, being intended for transmitting signals, in a fluid-carrying channel (2), using a pulser (1) designed to be integrated in the channel (2) and having a housing (4) and an adjustable throttling device by means of which the flow resistance can be varied at at least one point of the channel (2), an electrical generator (16), an impeller (9) exposed to the fluid passing through the channel and designed to drive the generator (16), a control device by means of which the load of the generator (16) can be varied in response to control signals, and an actuating device that is connected to the throttling element (12) and effects an adjustment of the throttling element responsively to the driving torque of the generator (16). The impeller (9) is axially movably mounted and yieldingly supported against the direction of fluid flow such that the supporting force of the yielding support (21) increases as the axial movement of the impeller (9) increases, and the throttling device includes an axially adjustable throttling element (12) that is coupled to the impeller (9) in such a way that the throttling element (12) is adjusted in the sense of increasing the throttling effect by an axial movement of the impeller in the direction of fluid flow.
La présente invention porte sur un dispositif de production d'impulseurs de pression pour la transmission de signaux, dans un canal transportant du liquide (2), utilisant un générateur d'impulsions (1) conçu pour être intégré dans le canal (2), et muni d'un logement (4) et d'un dispositif d'étranglement réglable grâce auquel on peut régler la résistance au débit à au moins un point du canal (2), un générateur électrique (16), une turbine (9) exposée au liquide qui traverse le canal et conçue pour entraîner le générateur (16), un dispositif de commande qui permet de régler la puissance de charge du générateur (16) en réponse aux signaux de commande, et un dispositif de commande qui est relié à l'élément d'étranglement (12) et qui règle celui-ci selon le couple moteur du générateur (16). La turbine (9) est montée de façon mobile et axiale et dotée d'éléments d'appui coulissants contre la direction du débit de liquide de telle manière que, plus le mouvement axial de la turbine (9) augmente, plus la force de soutien du support coulissant (21) augmente. Le dispositif d'étranglement comprend un élément d'étranglement réglable (12) qui est couplé à la turbine (9) de telle manière qu'il se règle et augmente l'effet d'étranglement grâce au mouvement axial de la turbine, dans la direction du débit de liquide.
Draeger Uwe
Winnacker Helmut
Precision Drilling Technology Services Gmbh
Ridout & Maybee Llp
Weatherford Energy Services Gmbh
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