Pressure converter
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United States of America Patent
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Apr 6, 1999
Grant Date -
N/A
app pub date -
Apr 11, 1997
filing date -
Oct 12, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Pressure amplifier for mounting above the drill bit at the lower end of a drill pipe for generating an increased fluid pressure in a drilling fluid flow, for example for obtaining an increased drilling effect. A reciprocating piston in a cylinder is designed with a large piston area at one end (low pressure side), a relatively small piston area at the opposite end (high pressure side), and an annular surface formed at the transition between the two ends. The pressure converter also includes a control valve, an actuator, and a drilling fluid valve to control drilling fluid flow to and from the cylinder.
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