RIASSUNTO
IADC Members *SPE Member
Abstract
Interrupted (non productive) time caused by either contractor, operator or third parties will result in considerable loss of time and money. This paper describes a method used to record and analyze interrupted time in two broad categories - those due to improper procedure, and those due to equipment failure. The objective is to improve profitability by managing downtime associated with equipment failures and the application of incorrect procedures.
Identification of the most frequent occurring problems is paramount in the determination of corrective measures to reduce the deficiencies in the performance of the operations.
Major incidents (interrupted time greater than 6 hours) are an indication of the contractor's overall performance and are easy to measure by consolidating and maintaining a simple database of operations.
This paper deals with ways of measuring the drilling contractors' performance focussing on total interrupted time. The performance analysis incorporates data from 164 wells drilled (meterage 384,300) and 82 work over wells in Africa, South America and Europe, both land and offshore during 1991/1992.
An attempt is made to demonstrate that this type of approach has resulted in more efficient services by the contractor and shows that improvements in staff training greatly reduces downtime caused by incorrect operating procedures while a good preventive maintenance program reduces downtime caused by equipment failure
As the oil industry shifts away from day rates to incentive type contracts, service quality assurance will become increasingly more important. A system of in-house auditing (service quality appraisal) and follow-up (rig/base management audit) has been found useful in gauging compliance with predetermined standards of performance.
Introduction
As dayrates remain depressed and stagnant and the oil industry becomes more competitive, contractors have had to find ways of differentiating themselves through improved performance and efficiency. As drilling performance improves the emphasis is changing from one of ""cheap"" dayrate to that of ""value for money, which benefits both contractor and operator through the minimization of non productive time. Therefore measuring the interrupted time is an all important yard stick in determining the overall efficiency of the rig operations.
A key measurement of performance was identified as deficiencies or interruptions that lead to major incident A major incident has been defined as an unplanned disruption of rig activity caused by EQUIPMENT or SERVICE or PERSONNEL of drilling contractor that results in an excess of 6 hours of rig downtime. This includes interruption of productive time due to FISHING as well as any repair to equipment which resulted in an expenditure of more than $25,000.00 irrespective of the time associated with the repair of the equipment. Non productive time attributed to third parties and which are beyond drilling contractor's control during well completion and testing operations shall not constitute an element in measuring the drilling contractor's performance.
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