Replaceable antennas for subsurface monitoring apparatus

Details Replaceable antennas for subsurface monitoring apparatus Replaceable antennas for subsurface monitoring apparatus

E - Fixed Constructions

21

B

E21B 47/00 (2006.01) E21B 47/01 (2006.01) E21B 47/12 (2006.01) G01V 3/18 (2006.01) G01V 3/30 (2006.01)

Patent

CA 2436485

An antenna structure is separately and independently formed with respect to a tubular adapted for long-term disposal within a wellbore. The antenna is adapted for easy and rapid deployment on the tubular. An independently formed 'partial ring section' (or arcuate shaped member) contains an antenna coil. In one embodiment, one or more of the independently formed partial ring sections is placed on the exterior of the tubular to form a well completion. In another embodiment, a plurality of partial ring sections are coupled to a spooled cable for rapid deployment of the antennas onto a tubular in the field. Another embodiment includes partial ring sections forming an antenna with multiple coils of differing orientation to provide directional sensitivity.

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