Mechanical Specific Energy (MSE), Drilling Power (DP), and Rate of Penetration (ROP) – Interpretations and Contributions to Drilling Efficiency
Drilling efficiency improvements lead to cycle time and drilling cost reductions. To achieve these benefits, improvements are needed in several different phases of the drilling process. Performance Drilling, seen as one of such enabling phases, requires an effective evaluation process so that drilling parameter inputs, effects, relationships, and outputs can be compared appropriately. The intent is to understand performance drilling from
a process standpoint, as well as its contributions to the drilling efficiency discussion. Presently, several different positions exist in the industry as to how Performance Drilling Efficiency should be interpreted and quantified. In some quarters, MSE is used as an efficiency measuring parameter. Others have extended MSE’s use to the
identification and remediation of drilling dysfunctions. DP is also used as an efficiency quantifying parameter by some in the industry. In some instances, ROP is also used as “the” efficiency parameter. These considerations must be re-visited, based on current industry learnings and positions.
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