Methods and apparatus for downhole propellant-based stimulation with wellbore pressure containment
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United States of America Patent
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Nov 20, 2018
Grant Date -
Mar 24, 2016
app pub date -
Sep 19, 2014
filing date -
Feb 28, 2013
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Abstract
Downhole stimulation tools include a housing and at least one propellant structure within the housing comprising at least one propellant grain of a formulation, at least another propellant grain of a formulation different from the formulation of the at least one propellant grain longitudinally adjacent the at least one propellant grain, and at least one initiation element proximate at least one of the propellant grains. At least one pressure containment structure is secured to the housing and comprises a seal element expandable in response to gas pressure generated by combustion of a propellant grain of the at least one propellant structure. Related methods are also disclosed.
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