Drilling tool intended to widen a well
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United States of America Patent
Stats
-
Aug 30, 1994
Grant Date -
N/A
app pub date -
Aug 17, 1992
filing date -
Dec 19, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The drilling tool (1) intended to widen a drilling well bears a series of helical arms (3) resting at a first end on a first fixed flange (4) so as to be able to turn on themselves by a portion of a turn under the control of a rotating ring (9) driven by an opening mechanism (10) controlled by a variation in the pressure of the drilling fluid, while the other end of the arm (3) slides along a groove (21) provided in a second flange (5).
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