E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 47/09 (2006.01) E21B 41/00 (2006.01) E21B 47/12 (2006.01) G01V 3/30 (2006.01)
Patent
CA 2259760
An apparatus for obtaining resistivity readings of the earth surrounding a wellbore (32) to determine the downhole location of the apparatus or to generate a log is disclosed. The apparatus comprises an electromagnetic transmitter (40) for transmitting electromagnetic waves (42, 46) into the earth and an electronics package (122). The electronics package includes a power source (200) providing a current to the electromagnetic transmitter (40), a current sensing device (204) for detecting the current drawn by the electromagnetic transmitter (40), a sample and hold circuit (210) for sampling the current drawn by the electromagnetic transmitter (40) and a memory device (214) for storing the current draw information.
Halliburton Energy Services Inc.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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