Borehole closure
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 18, 2006
Grant Date -
Nov 4, 2004
app pub date -
Jun 21, 2002
filing date -
Jul 19, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A borehole closure includes a supply line made of plastic and having formed therein a longitudinal passage between a feed end for inlet of an impregnating fluid and a discharge end. The supply line is formed with transverse passages, each covered by a sealing ring. A non-return valve is provided to block a flow of impregnating fluid in the direction toward the feed end. The supply line is sealingly surrounded by an inflating tube to define an elongate annular chamber therebetween which is in communication with the transverse passages. A rupture assembly having a rupture disk is secured at an end surface of the discharge end of the supply line and constructed to burst when a pressure applied by the impregnating fluid exceeds a predetermined value.
First Claim
Other Claims data not available
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International Classification(s)
Cited Art Landscape
Patent Citation Ranking
- 4 Citation Count
- E21B Class
- 2.77 % this patent is cited more than
- 19 Age
