Method and apparatus for single-trip time progressive wellbore treatment
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United States of America Patent
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Jun 7, 2016
Grant Date -
Jun 7, 2012
app pub date -
Jan 25, 2012
filing date -
Nov 1, 2010
priority date (Note) -
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Abstract
A single trip multizone time progressive well treating method and apparatus that provides a means to progressively stimulate individual zones through a cased or open hole well bore. The operator can use pre-set timing devices to progressively treat each zone up the hole. At each zone the system automatically opens a sliding sleeve and closes a frangible flapper, at a preselected point in time. An adjustable preset timing device is installed in each zone to allow preplanned continual frac operations for all zones. An optional “Stand-Down-Mode” can be integrated into the timing system so that if pumping stops the timers go into a sleep mode until the pumping resumes. The apparatus can consist of three major components: a packer, a timing pressure device, and a sliding sleeve/isolation device. The packer may be removed.
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