06:00-09:00 Directional drilling 6” drain hole by slid and rotary mode from 3977m to3980m.
Drilling parameter: WOB: 3-6t, RPM: motor+40,Torque: 3-5KN.m,FR:750lpm, SPP: 2500-3000psi, ROP:1m/hr, N/L& NG.
Mud property:MW: 1.45g/cm3 FV: 53, PV: 26,YP: 8pa,Gel:2/5,FL: 3.5,PH:10,Cl-: 175000,Ca2+: 400 kf:0.0524