... oil or gas well as a supporting materials to improve the capacity.Comparing to traditional low strength supporting agent, such as quartz ... High pressure liquid solution will be filled into the cracked layers to support the facture, it can keep the oil and gas ... 52Mpa (105KN), 69Mpa (140KN), and 86Mpa, (174KN) three series, according to bulk density are divided into: low-density, medium density, high ...