Patent · US Expired

Method and apparatus for directional boring

US6199643A · kind A · utility

9Cited by

12References

10Claims

0Family size

Assignee

Tracto-Technik Paul Schmidt Spezialmaschinen · DE

Inventors

Alfons Hesse · Lennestadt, DE
Franz-Josef Puttmann · Lennestadt, DE

Key dates

Filing date	Jul 27, 1998
Grant date	Mar 13, 2001
Priority date	—
Expiry date	Jul 27, 2018

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B7/06
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

In directional boring using a boring apparatus having a driven string and a drill head with an excavating tool moving in an orbit about the longitudinal axis of the string, the tool moves with substantially constant angular velocity when boring straight ahead, but when boring along a curve it is stopped and set in vibration in order to obtain more accurate control of the curve.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.