Removable modular antenna assembly for downhole applications

摘要

A wellbore apparatus may include first and second tubular members joined together in end-to-end relation, the first tubular member having a reduced outer diameter end portion. The wellbore apparatus may further include a removable modular antenna assembly comprising a cylindrical dielectric housing removably positioned on the reduced outer diameter end portion of the first tubular member, at least one antenna coil carried by the cylindrical dielectric housing, and a first electrical connector coupled to the at least one antenna coil. The wellbore apparatus may also include resistivity processing circuitry coupled to the first electrical connector to determine an electrical resistivity of a wellbore based upon the at least one antenna coil.

主权项

1. A wellbore apparatus comprising:
first and second tubular members, each of the first and the second tubular members comprising an end portion having a first outer diameter; a removable modular antenna assembly comprising,
a hollow cylindrical dielectric housing comprising an inner wall and an outer wall, the inner wall comprising an inner wall diameter larger than the first outer diameter,at least one antenna coil carried by said hollow cylindrical dielectric housing;a dielectric material disposed around the at least one antenna coil and carried by said hollow cylindrical dielectric housing between the inner wall and the outer wall, wherein during operations of the wellbore apparatus the outer wall of the hollow cylindrical dielectric housing is exposed in a wellbore; anda first electrical connector coupled to said at least one antenna coil; and resistivity processing circuitry coupled to said first electrical connector to determine an electrical resistivity of a wellbore based upon said at least one antenna coil, wherein the first tubular member is removably inserted into the hollow cylindrical dielectric housing via a first opening of the hollow cylindrical dielectric housing and wherein the first tubular member is coupled to the second tubular member so that the first and the second tubular members are on a same axis and the end portions face each other.