Details: supply and delivery of ø6-7/8 " drag bit(three hinge type) of approved design with tungsten carbide insert with threaded pin connection. product specification as stated below and as per departmental sample & design: - i) circulation: single jet core circulation with mud/water ii) it should have pin connection of 2 3/8 api male thread of at least 12 nos. working thread and should be compatable with female 2 3/8 api thread of tool joint of drill string. iii) each hinges should have min. 07 nos of tungsten carbide block of approved dimensions and to be braze welded properly & should not be covered with paint
Sector: Water supply and Sewerage