EXTRA AREA DOWN-HOLE HAMMER APPARATUS AND METHOD
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United States of America Patent
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N/A
Issued Date -
Jun 21, 2012
app pub date -
Dec 15, 2011
filing date -
Dec 15, 2010
priority date (Note) -
Abandoned
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Abstract
Provided is an actuator and method for operating an actuator. For example, the actuator may have first and second operating phases, a housing having an opening receiving pressure, a piston inside the housing for moving along inside the housing and positioned therein for creating a first chamber between one end of the piston and the housing and a second chamber between the other end of the piston and the housing, first and second ports each capable of communicating with the pressure source during a different one of the first and second phases, an extra area chamber between the piston and the housing. In the first phase the first port may be communicating with the opening for providing pressure to the first and extra area chambers. In the second phase the second port may be communicating with the opening for providing pressure to the second chamber.
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