Developing a Model for Effective Cutting Transport Mechanism

Abstract

Abstract The transportation of cuttings and wellbore stability are indispensable in any drilling program. This is because a successful drilling operation is the key to a profitable business in the oil and gas sector, efficiency of cuttings transport is very important for a good drilling program, the transportation of these cuttings through the annulus is a complex problem that is affected by many parameters. The objective is to design drilling mud for efficient cutting transport in different holes sections and develop a model that is more effective in lifting cuttings through the annulus without affecting the stability of the wellbore. Cutting transport efficiency in vertical and deviated wellbore has been reported to depend on the following factors; hole geometry and inclination, average fluid velocity, flow regime, drill pipe rotation, pipe eccentricity, fluid properties and rheology, cuttings size and shape, cuttings transport velocity, slip velocity, etc., the accumulation of drilling cuttings in the wellbore causes several drilling problems. These includes an increase in torque and drag, which may limit drilling from reaching to a desired target formation, the analysis is carried-out using different cutting transport models like; larsians model, rubiandini's model, moore's model, Hopkins method and zeidler's slip velocity correlation. This paper work is aimed at achieving a cutting transport model (I,e developing a model), that is more effective in lifting the drilled cuttings from the wellbore through the annulus to the surface after considering different existing cutting transport models and it is required that parameters affecting the efficient cutting transport are considered simultaneously.