Patent · US Expired

Hard rock drilling device and method

US6814165B2 · kind B2 · utility

0Cited by
12References
12Claims
0Family size

Assignee

Inventor

Key dates

Filing dateDec 11, 2002
Grant dateNov 9, 2004
Priority date—
Expiry dateDec 16, 2022

Classification

  • Technology area (CPC E)Fixed Constructions
  • CPC primaryE21B21/12
  • WIPO fieldCivil engineering
  • WIPO sectorOther fields

Abstract

Method and apparatus for underground drilling and enlarging of holes, in particular in hard rock, by using a water-driven motor as drive unit.

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