Patent ID: 11859126
Assignee: ALLEMAN CONSULTING, LLC
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  E | IPC C  E

Claim 0:
1. A method of reducing fluid loss from a well or into a subterranean formation penetrated by a well, the method comprising:
(a) emplacing into the well a fluid loss pill comprising a brine and a partially crosslinked polymer comprising the product of an (i) underivatized guar or a derivatized guar and; (ii) a crosslinking agent comprising puffed boron particles having a density from about 0.05 to about 0.40 g/cc, a bulk density from about 150 to about 350 g/l and a diameter from about 420 to about 1,000 μm; and
(b) increasing the viscosity of the fluid loss pill under in-situ operating conditions at a targeted location within the well.