Reversible impact-operated boring tool

Details Reversible impact-operated boring tool Reversible impact-operated boring tool

1990-11-06

1992-12-22

Watts, Douglas D.

Tool driving or impacting

Processes

173 91, 173212, 91234, E21B 414

Patent

active

051727714

ABSTRACT:
A reversible impact-operated boring tool and a method for reversing the direction of operation of the same rapidly and safely is disclosed. The tool according to the invention possesses a second supply line for supplying pressurized fluid to the tool. The second supply line provides pressurized fluid to a directional valve within the tool. The tool operates in the forward mode for borrowing into the soil when pressurized fluid is supplied to this directional valve. When the pressurized fluid supply is terminated and the fluid is exhausted from the valve, the tool operates in the reverse mode. The tool according to the invention can be reversed safely without any need for hose manipulation and without turning off the primary fluid supply line.

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