Apparatus for directional boring under mixed conditions

USRE44427E1 · kind E1 · reissue

Assignee

• Vermeer Manufacturing Company · US

Inventors

• Randy R. Runquist · Knoxville, US
• Mark Van Houwelingen · Knoxville, US
• James Richard Rankin · Montezuma, US
• ReneMarcel Albert

Key dates

• Filing date: Jan 20, 2012
• Grant date: Aug 13, 2013
• Expiry date: Jan 20, 2032

Classification

• Technology area (CPC —): General

Abstract

A drill head for an apparatus for horizontal directional drilling. The drill head includes a device for detecting angular orientation, a holder for the device for detecting angular orientation, the device for detecting angular orientation being disposed therein, a hammer driven by a liquid and a drill bit. The holder, the hammer and the drill bit are connected head to tail along a longitudinal axis of a drill string with the holder at a proximate end of the drill head and the drill bit at a distal end of the drill head.