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:
Aug. 23, 1983
Filed:
Apr. 17, 1981
Joshua M Jackson, Houston, TX (US);
Vernon E Koval, Houston, TX (US);
NL Sperry Sun, Inc., Houston, TX (US);
Abstract
In situations where it is necessary to directionally drill boreholes from the surface in a substantially horizontal attitude, such as for pipeline river crossings, the precise directional parameters of drilling become critical. A system of tools for efficiently accommodating the precise directional steering of the drilling includes a continuous electrical communications path within a drill string, which path provides steering data at the surface for controlling the drilling operation. A side entry sub is positioned in the tool string at its upper end. A cable system is employed in each pipe section placed in the string and includes provisions for breaking and making connections with the cable without withdrawing the cable from the pipe string. A steering tool is fixedly positioned in the drill pipe near the drill bit and is not normally withdrawn from the hole except with the drill bit.