Fluid operated vibratory jar with rotating bit
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United States of America Patent
Stats
-
Oct 20, 1992
Issued Date -
N/A
app pub date -
May 14, 1991
filing date -
Jun 16, 1989
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A downhole oil well tool uses impact, reciprocal drilling and an improved rotating bit or like working member, receiving both fluid pressure and weight from an elongated pipe string with a flow bore in order to drive the tool. A valve within tool housing controls fluid pressure to the working end so that the tool pressures up, then releases pressure through the working member allowing the pipe string to load the bit, creating impact. A clutch rotates the working member during drilling to prevent imprint upon the formation. A bias spring is provided to control and adjust the amount of weight on the bit independent of pipe weight.
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Cited Art Landscape
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