Apparatus utilizing shape-memory and self-assembly to plug relatively wide remote fractures

Abstract

Embodiments relate to a lost circulation material comprising a plurality of shape memory polymer members, each member having a temporary shape and a permanent shape. The members may be programmed to form a temporary shape that is small enough to be used with conventional drilling equipment and may further transform to corresponding permanent shapes to plug fractures. Specifically, the shape memory polymer-based lost circulation material can utilize self-assembly to plug fractures formed during drilling. Embodiments of the lost circulation material can be particularly useful for plugging large fractures. Permanent shapes present different topologies including granular, fibers, and two-dimensional networks/lattices in which can mechanically interlock and form a three-dimensional plug large enough to seal large width fractures.

Dependencies are inferred from the claim text.