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AssigneePrecision Energy Services, Inc.
InventorsMacmillan M. Wisler, Larry W. Thompson, Jian-Qun Wu, Lance Pate
Estimating the term…
A steerable, magnetic dipole antenna for Measurement-While-Drilling (MWD) or Logging-While-Drilling (LWD) applications. The antenna elements use a hole arrangement in addition to grooves in a steel tool body, which is typically a drill collar. This antenna embodiment is extremely robust, meaning that does not significantly reduce the structural integrity of the tool body in which it is disposed. The antenna embodiment is also relatively wear resistant. The resultant magnetic dipole generated by this antenna is also electrically steerable in inclination angle from a common origin. A variable dipole moment inclination angle combined with independently measured tool rotation orientation during normal drilling allows the antenna to generate a magnetic dipole moment that may be directed at any three dimensional angle and from a common origin point at the centroid of the antenna. The antenna can also be embodied to be more sensitive to resitivity in a particular azimuthal direction.
An antenna for creating or detecting a magnetic field substantially perpendicular to the major axis of a substantially cylindrical tool;
The antenna of claim 2 wherein the radial dimension of each said insert is greater than the azimuthal dimension of said insert.
A method for creating or detecting a magnetic field substantially perpendicular to the major axis of a substantially cylindrical tool;
A magnetic dipole antenna disposed in an antenna housing, the antenna comprising:
A measurement-while-drilling tool including at least one magnetic dipole antenna, said tool further comprises:
A method for generating a steerable magnetic moment vector using a magnetic dipole antenna disposed in an antenna housing, the method comprising:
An antenna for creating or detecting a magnetic field with a component substantially perpendicular to the major axis of a substantially cylindrical tool;
An electromagnetic antenna disposed within antenna housing, the antenna comprising
A method for creating or detecting a magnetic field, the method comprising:
A measurement-while-drilling tool comprising a magnetic dipole antenna array, said tool further comprises:
A method for steering the drilling of a borehole by creating or detecting a magnetic field on one side of a MWD tool while essentially canceling said field on the opposite side of said tool, said method comprising:
Dependencies are inferred from the claim text.