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:
Feb. 21, 1995
Filed:
Nov. 10, 1993
Applicant:
Inventor:
William A Goldman, Houston, TX (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
175 24 ; 175 40 ;
Abstract
A method and apparatus are provided for drilling a borehole through formations of the earth to a targeted position relative to the entrance of the borehole on the surface of the earth. At each measurement of the position and orientation of the downhole drilling mechanism, the system controller determines a new optimum path to the target and commands the drilling apparatus to produce this optimum path. Different criteria may determine the optimum path. The preferred criterion is the path of minimum tortuosity.