Igili C, Okonkwo J, Ogbimi E, Chinyem F, Enebrayekedou E. EVALUATION OF THE EFFECTIVENESS OF LOCAL CLAY FOR USE AS WATER-BASED DRILLING MUD (A CASE STUDY OF AMAI IN UKWUANI L.G.A, DELTA STATE). FJS. 2026;10(8):221-226. doi:10.33003/