Device for transmitting to the surface the signal from a...

Details Device for transmitting to the surface the signal from a... Device for transmitting to the surface the signal from a...

H - Electricity

04

B

324/9

H04B 13/02 (2006.01) E21B 17/00 (2006.01) E21B 17/16 (2006.01) E21B 47/12 (2006.01) G01V 3/30 (2006.01) H01Q 1/04 (2006.01)

Patent

CA 1217231

ABSTRACT A transmitter accommodated within the drill collar of a drill pipe transmits information from sensors at the bottom of a drilling well using an antenna of a special type which, unlike prior antenna, does not cause weakening of the drill collar and which allows signal transmission even when -the drill collar is immersed in insulating mud. The antenna consists of a cylindrical metal sleeve which is shorter than but has a greater diameter than the drill collar. The antenna is arranged coaxially on the drill collar, being separated from it by an insulating sheathing covering the drill collar.

453626

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