Stabilizer-reamer for drilling an oil well
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United States of America Patent
Stats
-
Aug 4, 1998
Grant Date -
N/A
app pub date -
Oct 30, 1996
filing date -
Oct 31, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The subject of the present invention is a stabilizer-reamer for drilling an oil well. The invention provides an improvement to drillpipe string stabilizers used when drilling an oil well. The purpose of the stabilizer, which forms the subject of the invention, is to allow the drillpipe string to be raised through fractured formations, in addition to its normal function of stabilizing the drillpipes. To this end, it is fitted with retractable abrasive blades which make it possible to re-drill the fractured formations when the drillpipes are being raised and to avoid jamming in the well. The main claims relate to the novel function of the stabilizer, to the geometry of its elements and to the mechanism of opening the blades.
First Claim
Other Claims data not available
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International Classification(s)
Cited Art Landscape
Patent Citation Ranking
- 87 Citation Count
- E21B Class
- 96.56 % this patent is cited more than
- 27 Age