Patent ID: 8997854
Filing Date: 2015-04-07
Classification: E21B

Abstract:
1. A downhole apparatus, comprising: a mandrel; a swellable element comprising a swellable elastomeric material selected to increase in volume on absorption of at least one predetermined fluid, secured to the mandrel; a pair of end rings, screwed to the mandrel, disposed at each end of the swellable element; a pair of flexible support assemblies, rigidly screwed to the mandrel, each disposed between one of the end rings and the corresponding end of the swellable element, defining an unfilled internal volume operable to receive a portion of the swellable element upon axial expansion of the swellable element, each comprising: a first anchor area, formed on a radially outer surface of a portion of the support assembly, operable to anchor the swellable element to a surrounding surface upon swelling of the swellable element, comprising: