US 11,692,923 B2
Standard sample for measuring rock porosity by helium method
Hongyu Du, Chengdu (CN); Jianqiao Weng, Chengdu (CN); Minghui Qi, Chengdu (CN); Qian Cao, Chengdu (CN); Hu Liu, Chengdu (CN); Yeyu Zhang, Chengdu (CN); and Qiang Xu, Chengdu (CN)
Filed by Sichuan Keyuan Testing Center of Engineering Technology Co., Ltd, Chengdu (CN)
Filed on Aug. 10, 2022, as Appl. No. 17/885,495.
Claims priority of application No. 202110934012.1 (CN), filed on Aug. 13, 2021.
Prior Publication US 2023/0051513 A1, Feb. 16, 2023
Int. Cl. G01N 15/08 (2006.01)
CPC G01N 15/088 (2013.01) [G01N 15/0806 (2013.01); G01N 2015/0813 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A standard sample for measuring rock porosity by helium method, comprising a cylinder body (1) open above and a cover body (2) matching the cylinder body (1), wherein a center of the cover body (2) is provided with a vent hole (3); the cylinder body (1) is filled and tamped with filled sand body so that a theoretical value of porosity in the cylinder body (1) is 5%-10%, and the filled sand body comprises mixed sand body (4) and quartz cotton (5); the mixed sand body (4) comprises coarse-grained high-purity quartz sand, medium-grained high-purity quartz sand and fine-grained silicon micropowder; and the cover body (2) is sealed at the opening of the cylinder body (1) by a thermal packaging process after the filling and tamping.