Patent ID: 9677371
Date: 2017-06-13
CPC Classifications: C09K,E21B

Claim:
1. A method, comprising: initially plugging a fluid loss opening of a well with a plurality of discrete stop loss elements, the stop loss elements comprising a polymer, the polymer, while initially plugging the fluid loss opening, resisting deformation at an initial stiffness in response to an initial strain rate of the polymer to produce a specified initial pressure signal, the polymer comprising a viscoelastic polyurethane, a viscoelastic phenolic resin or a viscoelastic epoxy resin, wherein the polymer has: continuing to plug the fluid loss opening with the plurality of discrete stop loss elements, the polymer, while continuing to plug the fluid loss opening, deforming at a subsequent, lower stiffness in response to a subsequent, lower strain rate to produce a subsequent, different specified pressure signal.