Device for producing pressure pulses in an oil well fluid medium
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United States of America Patent
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Mar 6, 1990
Grant Date -
N/A
app pub date -
May 9, 1988
filing date -
May 9, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An apparatus for producing pressure pulses in an oil well fluid medium is established which includes a main valve member moveable relative to a supporting member by a pressure gradient between two flow channels. The main valve body is longitudinally moveable relative to the supporting body, and a gap is provided between the two bodies. The gap is opened for fluid flow which prevents the development of dead water zones and the buildup of sedimentary deposits to prevent restriction of movement between the two bodies. The gap includes one or more throttle zones to assist in maintaining the necessary gradient between the two flow channels.
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