Patent ID: 9725975
Date: 2017-08-08
CPC Classifications: C09K,E21B

Claim:
1. A method of drilling a wellbore, the method comprising: introducing a pill comprising a wellbore strengthening fluid that comprises a first drilling fluid, a particulate, and a fiber into a section of a wellbore penetrating a subterranean formation, wherein the fiber has an aspect ratio of greater than about 5 and a length of about 2500 microns to about 6000 microns; forming a plug comprising the particulate and the fiber in a void near the wellbore, the plug having a plug breaking pressure of greater than about 1000 psi thereby yielding a strengthened wellbore section; and passing a second drilling fluid through the strengthened wellbore section, wherein the plug maintains drilling fluid loss control to the plug with an overbalance pressure exceeding the pressure of fluids in the subterranean formation ranging from about 500 psi to about 2500 psi in the wellbore.