| 초록 |
Drilling mud is the complex fluid used in drilling systems, which conducts transporting cuttings from reservoir, controlling formation pressure and maintaining well bore stability. Drilling mud, especially for water based drilling mud (WBM), is mainly composed of bentonite, barite and polymer. The important feature of the WBM is shear thinning behavior, bentonite contribute to the shear thinning behavior. We attempted to directly characterize the bentonite surface to control the rheological properties, unlike the simple addition of materials. Bentonite was ball-milled on a nano scale, and then MoS2 and WS2 were grown on the surface. The bentonite was named nano bentonite with MoS2 / WS2 (NB-MoS2, NB-WS2) and mixed with bentonite at various ratios. In order to confirm the properties of WBM manufactured under various conditions, the viscosity according to the change of flow rate was measured. We expect that this method will be a new way to easily change the properties of WBM. |
