Downhole drilling assembly
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United States of America Patent
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Feb 2, 2016
Grant Date -
May 10, 2012
app pub date -
Mar 19, 2010
filing date -
Mar 20, 2009
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A downhole stabilizer (5), such as a drill motor stabilizer, comprises at least one reaming means and/or reinforcing means (10). The present invention also relates to an assembly (30), such as a downhole drilling assembly (31), comprising at least one such stabilizer (5) and/or a drill bit (40,41) comprising a gauge bit (42) at or near a drilling end (45) thereof, and a connection means (46) for connecting the drill bit (40,41) to a drill motor assembly (60), wherein the drill bit gauge (42) comprises a substantially cylindrical portion having a length less than or equal to approximately 1.0 times the nominal bit diameter. The present invention also relates to a novel locking mechanism (80), such as a lock and key mechanism, to allow locking of a shaft (70′), e.g. a motor drive shaft (71′), through or together with a stabilizer (5′).
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Cited Art Landscape
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