US 11,851,606 B2
Lost circulation test method for expandable geopolymers
Weibin Zha, Spring, TX (US); Meng Lu, Sugar Land, TX (US); and Janine Shipman, Houston, TX (US)
Assigned to CNPS USA CORPORATION, Houston, TX (US); BEIJING HUAMEI INC., Beijing (CN); and CHINA NATIONAL PETROLEUM CORPORATION, Beijing (CN)
Filed by CNPC USA CORPORATION, Houston, TX (US)
Filed on Oct. 28, 2021, as Appl. No. 17/452,734.
Prior Publication US 2023/0136505 A1, May 4, 2023
Int. Cl. C09K 8/00 (2006.01); C09K 8/24 (2006.01); C09K 8/487 (2006.01); G01N 15/08 (2006.01); C09K 8/504 (2006.01); C04B 28/00 (2006.01); C04B 28/02 (2006.01)
CPC C09K 8/5045 (2013.01) [C04B 28/006 (2013.01); C04B 28/021 (2013.01); G01N 15/082 (2013.01); G01N 15/0806 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method of testing an expandable geopolymer lost circulation material comprising
obtaining a permeability plugging tester, wherein the permeability plugging tester comprises a test cell;
loading a drilling fluid to a lower part of the test cell, wherein the drilling fluid is on top of a piston located in the test cell;
placing a glass paper on top of the drilling fluid;
loading a geopolymer on top of the glass paper;
increasing temperature within the test cell, wherein the geopolymer expands and solidifies;
applying pressure from the piston; and
testing lost circulation prevention capability of the expandable geopolymer, comprising collecting and measuring how much of the drilling fluid comes out of the test cell.