Apparatus and method for downhole drilling communications

Details Apparatus and method for downhole drilling communications Apparatus and method for downhole drilling communications

E - Fixed Constructions

21

B

E21B 19/22 (2006.01) E21B 17/00 (2006.01) E21B 23/14 (2006.01) E21B 47/00 (2006.01)

Patent

CA 2252400

An apparatus (8) for downhole drilling communications is presented. The apparatus includes a spool (10) and end pieces (14a and 14b) for maintaining the spool (10) at the bottom of a drill string (46) near a drill bit (42) during drilling operations. The apparatus (8) provides a cable (12) for communicating signals between a downhole electronics package and a surface receiver (34) in order to perform measurements while drilling. A method of forming the apparatus is also set forth wherein the apparatus is formed about a central spindle and lathe.

Cette invention concerne un dispositif (8) permettant de communiquer avec le fond-de-trou pendant des opérations de forage. Ledit dispositif comporte une bobine (10) et des pièces d'extrémités (14a et 14b) conçues pour maintenir ladite bobine (10) en partie inférieure d'un train de tiges (46), à proximité d'un trépan (42), pendant les opérations de forage. Ledit dispositif (8) comporte un câble (12) destiné à la transmission de signaux entre un ensemble de circuits électroniques situés au fond du trou et un récepteur de surface (34), dans le but d'effectuer des mesures pendant le forage. L'invention concerne également un procédé de fabrication dudit dispositif consistant à former ledit dispositif autour d'un axe central disposé sur un tour.

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