Method and apparatus for in-situ wellbore measurement and control with inductive connectivity

摘要

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.

主权项

1. An apparatus for in-situ wellbore measurements, the apparatus comprising:
one or more sensors arranged outside a wellbore; one or more actuators associated with the sensors; an electromagnetic transceiver situated inside a wellbore conduit and mounted on an electric-line logging cable, wherein the transceiver has a first transmission antenna and a first receiver antenna spaced apart from the first transmission antenna; at least one wireless instrument unit situated outside a non-magnetic portion of the wellbore conduit and operatively connected to the one or more sensors and the one or more actuators wherein the wireless instrument unit has a second transmission antenna and a second receiver antenna spaced apart from the second transmission antenna; and a downhole interface unit also located on the electric-line cable for controlling communication to the apparatus.