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• W2019420175 abstract "Abstract The identification of drillstring elements (in particular drillpipes) is currently performed in PETROBRAS using serial numbers imprinted somewhere on the body of the element. A procedure will be set up to establish effective control of these elements, such as accumulated cycles, accumulated footage, inspection reports and, particularly, accumulated fatigue. It is necessary to track each element along all campaigns in which it takes part by identifying its position on the drillstring, registering the mechanical parameters it is submitted, and registering the mechanical conditions of the borehole. Using the traditional imprinted serial number, it is difficult (or almost impossible) to keep a reliable log of each drillstring element in the rig site. The use of electronic chips attached to the body of these elements allows a fast, efficient, and reliable identification of each element through a unique key number. A manual reader is used to scan the chip and send the information to a local database at the rig site. The drilling parameters are obtained in real time through sensors distributed along the rig and sent to the database. At given time intervals, these data are used to calculate the fatigue each element was exposed to and accumulate the data in the database. A suitable mathematical model then is used for the fatigue calculation. Before being connected to the drillstring, each element is checked for accumulated fatigue and is accepted or rejected depending on the expected fatigue it will be exposed to in the campaign. Integrated databases on the operative units control the stock, inspection reports, supply, purchase, and discard of the drilling elements. Elements used before the implementation of the system are considered dummy elements with respect to the accumulated fatigue and are treated as usual. New elements are tracked since the first drilling operation. A period of several years (the average life span of the elements) is expected until all old, untracked elements are replaced by new, tracked elements. Among several benefits, this procedure is expected to significantly decrease drillstring failure due to mechanical fatigue, with consequent associated cost savings. P. 619" @default.
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• W2019420175 date "1998-09-27" @default.
• W2019420175 modified "2023-10-18" @default.
• W2019420175 title "Using Radio Frequency Identification Electronic Chips to Effectively Control the Elements of the Drillstring" @default.
• W2019420175 doi "https://doi.org/10.2118/49203-ms" @default.
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