发明名称 Well servicing agents and processes
摘要 Well servicing agents and processes for use with fluids circulated into wells penetrating subterranean formations in the earth's crust. Circulation losses of well servicing fluids including drilling muds, workover and completion fluids, and the like, are alleviated by incorporating a particulate material into the servicing liquid. The particulate material is formed of a thermoplastic polymer in a flexible, elongated laminar form in which its length is substantially greater than its width and its width substantially greater than its thickness. A second particulate material in a rigid granular form may be employed an admixture with the laminar particulate material. A particular lost circulation agent is a blend of a particulate thermoplastic polymer in a flexible, elongated form and a particulate thermoset polymer in a rigid granular form with the ratio of the laminar material to the granular material being at least 1:6.
申请公布号 US4579668(A) 申请公布日期 1986.04.01
申请号 US19830499117 申请日期 1983.05.27
申请人 THE WESTERN COMPANY OF NORTH AMERICA 发明人 MESSENGER, JOSEPH U.
分类号 C09K8/035;E21B21/00;(IPC1-7):C09K7/00;E21B7/18 主分类号 C09K8/035
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