Percussion down hole drilling tool with central fluid flushing p

Details Percussion down hole drilling tool with central fluid flushing p Percussion down hole drilling tool with central fluid flushing p

1984-07-13

1988-02-23

Bell, Paul A.

Tool driving or impacting

Work cleansing

By motive fluid for drive motor or advance causing or...

B25D 1714

Patent

active

047264292

ABSTRACT:
A percussion drilling tool assembly is provided which operates under fluid pressure to reciprocating a hammer, the hammer is disposed in a barrel assembly and operates to strike an anvil bit shank to cause the bit to thereby penetrate a rock substrate material of central fluid passage through the drill stem of the assembly and through the reciprocating hammer allows a flushing fluid to be used with the drilling assembly to flush cuttings from the hole up and around the drill stem simultaneously with and separate from the fluid operating system for reciprocating the hammer.

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patent: 4280570 (1981-07-01), Walter
Catalog No. M500, TRW Mission, "Operation and Maintenance Manual", Percussion Drilling Equipment.

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