Patent ID: 7648946

Claim:
A method of drilling a well bore in a subterranean formation, comprising: using a well drill-in and servicing fluid to drill a well bore in a subterranean formation, the well drill-in and servicing fluid comprising a base fluid, a viscosifier, a fluid loss control additive, a bridging agent, and at least one delayed-release acid component selected from the group consisting of an ortho ester and a poly(ortho ester), wherein the delayed-release acid component is present in the well drill-in and servicing fluid in an amount in the range of from about 1% to about 40% by weight; permitting the well drill-in and servicing fluid to establish a filter cake in at least a portion of the well bore; contacting the filter cake with an initiator component separate from the well drill-in and servicing fluid; and permitting the filter cake to degrade at a desired time.