Method and apparatus for in-situ wellbore measurement and control with inductive connectivity
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United States of America Patent
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Apr 12, 2016
Grant Date -
May 2, 2013
app pub date -
Nov 30, 2010
filing date -
Dec 4, 2009
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Abstract
An apparatus and method for in-situ wellbore measurements wherein the apparatus includes one or more sensors arranged outside a wellbore, one or more actuators associated with the sensors, a wireless instrument unit situated outside the non-magnetic portion of wellbore conduit, and an electromagnetic transceiver situated inside a non-magnetic portion of wellbore conduit and mounted on an electric-line logging cable, each of the wireless instrument unit and the transceiver have a transmission antenna and a spaced apart receiver antenna, each transmission antenna disposed to be positioned to oppose through the non-magnetic casing a receiver antenna to form a phase-locked loop that verifies the relative positions of the transceiver and wireless instrument unit.
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