Drill Stem Inspection
Depending on how severe the working condition/environment is, in terms of erosion and corrosion on one side, and high loads which are normally being applied on the drill string to proceed to buttonhole of the well on the other side, the formation of the flaws on drill string component are likely to occur. Thus, since the failure of the drilling string components during drilling process could be a waste of time and money, tubular inspection of the used drill string is highly recommended. Considering the variety of drilling environment in terms of Land or Sea beside the geology where the well is being drilled which directly makes the cost of a possible failure very high, the stricter scope of inspection according to related standards is applied. Third Vol. of DS-1 (Drill Stem Inspection) published by T H Hill Associates, Inc, is one of the most applicable standards introducing a different level of strictness as per client’s request from Category 1 to Category 5.
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