Fluid operated drilling device and a method for drilling a hole
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United States of America
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Jun 28, 2022
Grant Date -
Aug 27, 2020
app pub date -
Aug 21, 2018
filing date -
Aug 21, 2018
priority date (Note) -
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status (Latency Note)
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Abstract
A fluid operated drilling device for drilling a hole includes a hammer connected to a drill rod, and a rotation device to rotate the drill rod and the hammer. The hammer includes a tubular main body, a back head, a cylindrical piston housing, a reciprocating piston and a space between the piston. The piston housing is divided by an annular pressurizing portion into first and second space portions for elevating and striking the piston. First communication channels from a hollow portion of the piston into a second space between the piston and the main body discharge fluid between the piston and the main body. A method for drilling a hole using the fluid operated drilling device is also disclosed.
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