Piston Design for Downhole Pulser
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United States of America Patent
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Issued Date -
Nov 10, 2016
app pub date -
May 6, 2016
filing date -
May 8, 2015
priority date (Note) -
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Abstract
A measurement while drilling (MWD) tool includes a sensor, an encoder operably connected to the sensor and a pulser operably connected to the encoder. The pulser includes a linearly acting bidirectional piston that operates a poppet valve. The poppet valve is designed to completely or partially interrupt the flow of fluid through the MWD tool. The selective operation of the piston-driven poppet valve creates pressure signals that are carried through the fluid. The piston assembly that drives the poppet valves includes wear rings that improve the performance and durability of the piston.
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