Array antenna for measurement-while-drilling

Details Array antenna for measurement-while-drilling Array antenna for measurement-while-drilling

H - Electricity

01

Q

H01Q 21/00 (2006.01) G01V 3/28 (2006.01) H01Q 1/22 (2006.01) H01Q 9/16 (2006.01) H01Q 21/20 (2006.01)

Patent

CA 2619623

An electromagnetic antenna for Measurement-While-Drilling (MWD) applications is disclosed. The antenna can include several array elements that can act alone or together in various measurement modes. The antenna elements can be disposed in tool body recesses to be protected from damage. The antenna elements can include a ferrite plate crossed or looped by independent current carrying conductors in two or more directions forming a bi-directional or crossed magnetic dipole. Although disclosed as a MWD system conveyed by a drill string, basic concepts of the system are applicable to other types of borehole conveyance.

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