Measurement while drilling apparatus and method of using the...

Details Measurement while drilling apparatus and method of using the... Measurement while drilling apparatus and method of using the...

E - Fixed Constructions

21

B

E21B 47/12 (2006.01)

Patent

CA 2621416

A method and apparatus used to transmit information to the surface from a subsurface location during the process of drilling a bore hole is described. A novel pressure pulse generator or "pulser" is coupled to a sensor package, a controller and a battery power source all of which reside inside a short section of drill pipe close to the bit at the bottom of the bore hole being drilled. The assembled apparatus or "MWD Tool" can be commanded from the surface to make a measurement of desired parameters and transmit this information to the surface by encoding data in pressure pulses generated by a pulser valve that includes a stator and a rotor which may be open and closed to create pressure pulses.

L'invention concerne un procédé et un appareil utilisés pour transmettre des informations à la surface à partir d'un emplacement souterrain pendant le processus de forage d'un trou de forage. Un générateur d'impulsions de pression nouveau ou "système de pulsation" est couplé au boîtier de capteurs, un contrôleur et une source d'alimentation par batterie, tous résidant à l'intérieur d'une section courte de tige de forage à proximité du trépan au fond du trou de forage en cours de forage. L'appareil assemblé ou "outil MWD" peut être commandé depuis la surface afin d'effectuer une mesure de paramètres souhaités et de transmettre lesdites informations à la surface par codage de données en impulsions de pression générées par une soupape de système de pulsation qui comprend un stator et un rotor pouvant être ouverts et fermés afin de créer des impulsions de pression.

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