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:
Jul. 26, 1983
Filed:
Jun. 12, 1980
Kirk R Shirley, Houston, TX (US);
Other;
Abstract
Well bore drilling apparatus has a steering tool operable to stabilize the drill string above the drill bit and to selectively cause a lateral force to be applied to the bit to deflect the drill in a selected direction. The apparatus includes master sensors, in the form of pistons, which sense the lateral force of the drill stem on the low side of the hole and apply fluid pressure to selected slave pistons which are circumferentially spaced above the drill bit to apply lateral thrust in the selected direction. The slave pistons are selected by valves in the apparatus which are opened or closed, as desired, either before running the tool into the well bore or by a wireline manipulator tool while the tool remains in the well bore.