Drilling Variables At Technical Limit Of Drilling Rate

Abstract

Recorded drilling times may show significant variations from well to well even for the same total depth in the same field. Apart from the formation characteristics, engineers' technical ability plays an important role in determining drilling time.A drilling performance is usually compared with respect to the performances of previously drilled wells. This approach has two major drawbacks. One, in newly developed fields, there may not be sufficient number of drilled wells to make a healthy comparison. Two, past drilling practices may not represent good engineering practices.In this paper, a different approach is introduced in assessing drilling performance. The new approach suggests a comparison of drilling performance with respect to what is called 'technical limit of drilling rate', a maximum achievable drilling rate without risking drilling safety.

Effect of Barite Concentrations on Oil Based Drilling Mud Density and Rheology

“…Akgun (2002a and b) stated that the selection of mud weight is a challenge one faces during drilling operations. Penetration rate is decreased by increasing plastic viscosity, solid content and mud weight.…”