... 1, high degree of substitution, good uniformity of substitution PETROLEUM GRADE CMCfeatures: 1, high degree of substitution, good uniformity of ... drilling of oil . Petroleum grade Product: PAC-LV, PAC-R, CMC-LV, CMC-HV TYPES AND SPECIFICATION CMC (API-13A.B) ... HV30 min.30 min.30 min.10 max.TYPES AND SPECIFICATION PAC PropertyType Test ProcedureViscosity600rpm, Fann 35 in seawater/KClFiltrate ...