Delaying swelling in a downhole packer element

摘要: A swelling element rate regulation technique and product features an outer coating on a core of element. The is reactive to hydrocarbons or water depending how it configured. surrounding preferably formed fine ground particles non-swelling polymer mixed in solvent such as methyl-ethyl-ketone that applied thin layer the exterior. This uncured then contacted by patterned surface. surface pressed firmly against polymer/solvent mixture transfers inverse pattern coating. As pressure applied, heat may also be cure resulting designed openings are created regulate infiltration other fluids through and, result, wellbore. Swell governed part ratio exposed area compound total volume compound. smaller this ratio, slower swell. provide limited mechanical restraint element, further slowing process.