As shown in Fig. 2 mud viscosity, increased immediately.After addition of GLG. Moreover mud viscosity,,Increased significantly after heating. For example at,,Moderate shear rate (50 / s), the base mud demonstrated a.Viscosity of 42 cP. After adding GLG mud viscosity,,Increased to 71 cP. After heating mud viscosity, jumped to.240 cP. This phenomenon agrees with previous finding:GLG forms soft gel at elevated temperature (Kelco 2007).Compared with CMC GLG is, more effective in.Boosting mud viscosity (see the green curve in Fig. 2).Figure 2 also shows that mud viscosity is high at low.Shear rate which is, beneficial for suspending and transporting.Cuttings. At high shear rate mud viscosity reduces,,Which also reduces the pressure loss in the mud.Circulation system.
การแปล กรุณารอสักครู่..