Invention Grant
- Patent Title: Steerable magnetic dipole antenna for measurement while drilling applications
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Application No.: US15151705Application Date: 2016-05-11
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Publication No.: US09885800B2Publication Date: 2018-02-06
- Inventor: Macmillan M. Wisler , Larry W. Thompson , Jian-Qun Wu , Lance Pate
- Applicant: Precision Energy Services, Inc.
- Applicant Address: US TX Fort Worth
- Assignee: Precision Energy Services, Inc.
- Current Assignee: Precision Energy Services, Inc.
- Current Assignee Address: US TX Fort Worth
- Agency: Blank Rome, LLP
- Main IPC: G01V3/10
- IPC: G01V3/10 ; G01V3/28

Abstract:
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.
Public/Granted literature
- US09841528B2 Steerable magnetic dipole antenna for measurement while drilling applications Public/Granted day:2017-12-12
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