Raise boring head having fluid traversing means

Details Raise boring head having fluid traversing means Raise boring head having fluid traversing means

1976-11-11

1977-08-16

Purser, Ernest R.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

175 53, 175422, 175344, E21B 908

Patent

active

040420477

ABSTRACT:
The raise boring head comprises a stem in which is formed a passageway which extends fully throughout the axial length thereof for conducting fluid therethrough. The uppermost end of the passageway defines an inlet and, at the lowermost end, the same comprising an outlet, a coupling is fixed to receive threaded fitting elements for use to control and/or direct fluid flow from the outlet or axial end of the passageway. By this means a spray nozzle, as disclosed in one embodiment, can be threaded into the coupling to direct a conical spray of water onto the walls of the bore in order to suppress dust. In alternative embodiments, hose or like conduits can be used in operation with the passageway to facilitate the use of hydraulic, electrical, or pneumatic tools and devices in a subterranean chamber or tunnel below the raise.

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