1、 Field Testing Water-based Drilling Fluids API RECOMMENDED PRACTICE 13B-1 FIFTH EDITION,MAY 2019 ERRATA 1,MAY 2020 ERRATA 2,DECEMBER 2021 iii Special Notes API publications necessarily address problems of a general nature.With respect to particular circumstances,local,state,and federal laws and regu
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16、 and materials is published annually by API,200 Massachusetts Avenue,NW,Suite 1100,Washington,DC 20001.Suggested revisions are invited and should be submitted to the Standards Department,API,200 Massachusetts Avenue,NW,Suite 1100,Washington,DC 20001,standardsapi.org.v Contents 1 Scope.1 2 Normative References.2 3 Terms and Definitions.2 4 Symbols and Abbreviations.3 4.1 Symbols.3 4.2 Abbreviations.10 5 Drilling Fluid Density(Mud Weight).11 5.1 Principle.11 5.2 Apparatus.11 5.3 Mud Balance Proced
