| Patent Number |
Title Of Patent |
Date Issued |
| 7510029 |
System for tracking and maintaining an on-grade horizontal borehole |
March 31, 2009 |
| A tracking receiver system is used to track the progress of a downhole tool along a subsurface path having a desired grade. The tracking receiver system is adapted to detect a reference line originating from a reference line receiver and to determine the position of the downhole tool |
| 7389831 |
Dual-member auger boring system |
June 24, 2008 |
| A system for boring horizontal boreholes and installing products using a dual member drill string. The system is comprised of a boring machine with a frame and a rotary drive supported on the frame, a downhole tool, and a dual member drill string. The drill string comprises an inner |
| 7373993 |
System and method for locating and tracking a boring tool |
May 20, 2008 |
| A system for monitoring the position and orientation of a downhole tool assembly having multiple beacons. In a preferred embodiment the first and second beacons are supported by the downhole tool assembly. Both beacons are adapted to transmit signals that are indicative of the orientatio |
| 7353889 |
Rotary driven pipe-bursting tool |
April 8, 2008 |
| An apparatus for bursting pipe is preferably adapted to receive rotational energy from the inner member of a dual-member drill string. In a preferred embodiment, a plurality of pipe-bursting members, driven by the interconnected inner members, cut or burst a subterranean pipe. In ano |
| 7216724 |
Coupling for dual member pipe |
May 15, 2007 |
| A coupling assembly to interconnect an inner member and an outer member of a dual member drill string in torque transmitting engagement is disclosed. The coupling assembly is adapted to transmit torque input from both members to a downhole tool. In one embodiment, the coupling assembly |
| 7195079 |
Directional reaming system |
March 27, 2007 |
| A horizontal directional drilling system is used to drive operation of a guidable reamer assembly connected to a drill string. The guidable reamer assembly preferably has a cutting member with a central longitudinal axis and a support member also having a central longitudinal axis. The |
| 7111693 |
System and method for locating and tracking a boring tool |
September 26, 2006 |
| A system for monitoring the position and orientation of a downhole tool assembly having multiple beacons. In a preferred embodiment the first and second beacons are supported by the downhole tool assembly. Both beacons are adapted to transmit signals that are indicative of the orientatio |
| 6550547 |
System and method for automatically controlling a pipe handling system for a horizontal boring m |
April 22, 2003 |
| An automatic pipe handling system for automatically transporting pipe sections to and from a horizontal boring machine. The system comprises a pipe handling assembly, a pipe lubrication assembly, a makeup/breakout assembly, and an automatic control system. The pipe handling assembly |
| 6179065 |
System and method for automatically controlling a pipe handling system for a horizontal boring m |
January 30, 2001 |
| An automatic pipe handling system for automatically transporting pipe sections to and from a horizontal boring machine. The system comprises a pipe handling assembly, a pipe lubrication assembly, a makeup/breakout assembly, and an automatic control system. The pipe handling assembly |
| 5684466 |
Electrical strike system control for subsurface boring equipment |
November 4, 1997 |
| An electrical strike sensing system for providing an alarm if the underground boring equipment encounters a potentially hazardous condition. The system senses current carried through the equipment, as well as the voltage between the equipment and a reference. The measured current is |
| 5553676 |
Reversible expander |
September 10, 1996 |
| Several designs of reversible expanders (10, 50, 100, 150) are disclosed for use on an underground boring tool (14) of the type using an air impact hammer. The reversible expanders allow a borehole of larger diameter than the tool to be formed. The reversible expander (10) is interferenc |
