Open Access

ARTICLE

A Novel Method for the Design of Desirable Yield Point Range of Drilling Fluid

by

1 State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing, China.
2 MOE Key Laboratory of Petroleum Engineering, China University of Petroleum, Beijing 102249, China.

Structural Longevity 2013, 10(1), 27-35. https://doi.org/10.3970/sl.2013.010.027

Abstract

The objectives of this paper are to report a novel method for the design of desirable yield point range of drilling fluid, which take consider of the needs for drilling engineering and the principles of carry and suspend formation cuttings. The calculation model was derived using solid-liquid dynamics under certain given assumptions such as well structures, drilling fluid densities, depth, and etc., and corresponding software was developed in c#. Then, relationship between plastic viscosity and yield point has been expounded. For brevity, under the premise of no sedimentation, any one of the drilling fluid density, pump discharge, plastic viscosity and drilling fluid pump cylinder bore increases would result in the desirable yield point range turned out to be narrow. Drilling fluid pump discharge is the main cause of the decrease in the upper range of the desirable yield point range. While drilling fluid density is the main cause of the decrease in the lower range. The value of yield point is recommended a little higher than the lower range. In summary, the research will provide a useful theoretical reference for designers and field personnel, and make the regulation a clear task.

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Keywords

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