Patent · US Active

Drilling apparatus

US8887835B2 · kind B2 · utility

1Cited by

4References

16Claims

0Family size

Assignee

JFK EQUIPMENT LIMITED · NZ

Inventor

John Kosovich · Newmarket on Fergus, IE

Key dates

Filing date	Mar 15, 2011
Grant date	Nov 18, 2014
Priority date	—
Expiry date	Nov 8, 2032

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B4/14
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A drilling apparatus including a hydraulically powered hammer having a piston to impact a drill bit; a shuttle valve to control reciprocation of the piston; and an accumulator for hydraulic fluid; at least one drill rod having a first connection valve for connection of the drill rod to the connection valve of the hammer; and a second connection valve for connection of the drill rod to the first connection valve of a like drill rod or to a rotation device. The piston and shuttle valve are positioned substantially in-line to the axis of movement of the hammer. The accumulator is positioned proximate to the shuttle valve; and the first connection valve, and second connection valve having at least one poppet valve positioned proximate to a corresponding valve seat.

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