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:
Jan. 11, 2000
Filed:
Feb. 12, 1997
Applicant:
Inventors:
Franz-Josef Puttmann, Lennestadt, DE;
Alfons Hesse, Lennestadt, DE;
Assignee:
Tracto-Technik Schmidt Spezialmaschinen, Lennestadt, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
175 21 ; 175 45 ; 175 61 ; 175103 ;
Abstract
The invention pertains to a method for steering a ground drilling machine, in particular, a pipe string assembly with a drilling head which is driven in the ground in rotative, propulsive and, if so desired, percussive fashion, in which at least one deflection pulse is exerted upon the rotating drilling head or the pulses acting upon the drilling head are interrupted when the angular position of the drilling head relative its axis corresponds to the position in which the deflection should take place.