Formulation of Oil Based Mud from Ricinus Communis

Nanna Rimtip, Nuradeen Tanko

Abstract


In the last few decades, drilling operations involving conventional diesel oil-based mud, have posed a serious threat to the environment. Consequently, operators have been looking towards formulating eco-friendly drilling mud. This paper is aimed at formulating a synthetic oil-based drilling fluid from castor oil as a substitute for the usual diesel oil-based mud. To determine the suitability of castor oil as drilling fluids, the physiochemical properties (Kinematic Viscosity, pour point, Aniline Point, Flashpoint and specific gravity) and rheological properties (Mud Density, Mud pH, Mud Viscosity, Gel strength, and filtration) were tested. A hydrometer was used to determine the specific gravity, the KV-8 temperature-controlled bath was used to determine the kinematic viscosity. Also, mud balance was used to determine the Mud weight, while the OFITE model 900 viscometer was used to measure the viscosity, gel strength and yield point of the drilling mud. The result of the physiochemical analysis of Castor was observed to be in agreement with the available literature on base fluids that are required for drilling fluids formulation. Thus, qualifying castor oil to be used as a base oil in drilling fluids. In addition, the result for the rheological analysis of the newly formulated Castor oil-based mud demonstrated great viability for the muds to be used as replacements for diesel-based oil muds. Nevertheless, the only drawback observed for castor oil formulated fluid was its relatively high gel strength – which is not a desirable feature. However, it was established that some chemical additives could be added to the formulated fluid to improve the quality of gel strength.

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