The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 14, 1994
Filed:
Oct. 08, 1992
David A Ruley, Brenham, TX (US);
Frank C Forest, Richmond, TX (US);
Sharewell Inc., Stafford, TX (US);
Abstract
The present method and apparatus are directed to river crossings and the like. A horizontal drilling rig is set up and drills under a body of water or the like. Angular measurement sensors carried at the drill bit provide data periodically which is transmitted from a transmitter at the end of the drill string. Two antennas are deployed, the two being parallel strips spaced equally on the left and right of the right of way. They connect with two receivers. The transmitted angular data is used to determine the location of the drill bit. Progressive determinations of the transmitter enable determination of the trajectory during drilling. The two antennas are used to provide redundant reception of the transmitted signal. In addition to that, a quick reading of lateral drift is obtained by measuring the ratio of the received signals. The two antennas have the form of flat strips which can be deployed across the terrain, over a river, and the like.