Point gap assembly for a toroidal coupled telemetry system

Details Point gap assembly for a toroidal coupled telemetry system Point gap assembly for a toroidal coupled telemetry system

G - Physics

01

V

325/34, 324/8

G01V 1/40 (2006.01) E21B 17/00 (2006.01) E21B 47/12 (2006.01) G01V 9/00 (2006.01)

Patent

CA 1174279

Abstract An insulated point gap assembly for a toroidal coupled telemetry system wherein a drill collar (38), operable to be connected to a lower portion of a drill string (32), carries a toroidal core having primary windings (88) and secondary windings (130). An aperture (154) is laterally fashioned through the drill collar. A conductor (150) is connected to one end of the secondary and extends through the aperture and the other end of the secondary is connnected to the drill collar. The conductor is surrounded by an electrical insulation member (152). In a preferred embodiment, an axially extending sleeve of insulating material (156) is applied about the drill collar at the location of the conductor (150) to further isolate the conductor (150) from the drill collar.

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