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:
Sep. 18, 1990
Filed:
Jun. 14, 1989
Applicant:
Inventor:
Frank R Kinnan, Camas Valley, OR (US);
Assignee:
Underground Technologies, Inc., Byron, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ; E21B / ;
U.S. Cl.
CPC ...
175 61 ; 175 67 ; 175 73 ; 175320 ; 175324 ; 175424 ;
Abstract
A method and apparatus for creating an underground bore hole using high pressure fluid within a drill string to disturb and displace the subsoil. The drill string is steerable by increasing the pressure of the fluid above a predetermined range to a second range and apparatus is responsive thereto to effect a bending movement and change in the direction of the drill string.