Bit is designed for drilling of oil and gas wells in low compressive strength and very soft formations, such as soft shale, clay, rock salt, etc. 1. Quantity and diameters of nozzles: 3 or 4 pcs 2. Pin size:api 6 5/8 reg 3. Bit weight net(design/actual): 90kg 4. Bit weight gross(cardboard/wooden): 100kg 5. Rotation speed: 300-80r/min 6. Wob: 0.3-0.9kn/mm Features: 1. Combined circulation(three side jets and one central jet). 2. Shirttail and leg entering edge hardfacing. 3. Aggressive cutting structure In wooden case. Dimension: 38*34*53 cm
