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1. (WO2018160265) LOST CIRCULATION PILL FOR SEVERE LOSSES USING VISCOELASTIC SURFACTANT TECHNOLOGY

Pub. No.:    WO/2018/160265    International Application No.:    PCT/US2017/068620
Publication Date: Sat Sep 08 01:59:59 CEST 2018 International Filing Date: Fri Dec 29 00:59:59 CET 2017
IPC: C09K 8/60
C09K 8/584
Applicants: HALLIBURTON ENERGY SERVICES, INC.
Inventors: OLIVEIRA, Eliane Padua
LUZARDO, Juan Pablo
PANTANO, Ioana Agustina Gianoglio
DEVILLE, Jay Paul
RODRIGUES, Jorge de Almeida, Jr.
CELIA-SLIVA, Lucas Grillo
Title: LOST CIRCULATION PILL FOR SEVERE LOSSES USING VISCOELASTIC SURFACTANT TECHNOLOGY
Abstract:
A lost circulation composition includes at least one viscoelastic surfactant that can self-assemble into entangled worm-like micellar structures, increasing the viscosity of the composition at low shear rates. The entanglements of the worm micelles can be reduced at high shear rates, but can be regenerated when the shear rates are reduced. The viscosifying micelle behavior is present at temperatures above 100C and regardless of salinity.