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Measurement-While-milling(MWM):An innovative approach for increasing the casing milling efficiency in deep drilling operations

引用

Petroleum Research 2023年第3期8卷 360-369页

作者： Mohammed A.Namuq Mouhammed Jandal Berro Matthias Reich The American University of Kurdistan Petroleum Engineering DepartmentZakho Road42001DuhokKurdistan Region of IraqIraq H.Anger's Sons-Drilling and well Construction Company Gutenbergstraße 3337235Hessisch LichtenauGermany TU Bergakademie Freiberg Institute of Petroleum EngineeringAgricolastr.2209599FreibergGermany

Deep boreholes are secured by steel tubes(casings)which are run in the hole and cemented in *** most cases,these casings are considered a permanent ***,sometimes they have to be removed in order to repair or abandon the *** the casing is cemented in place,it cannot be pulled,but needs to be milled to small chips which are flushed out of the borehole by the drilling *** of the main challenges in casing milling operations is continuous and complete chip *** the metal chips are too long,chip nests will grow around the milling *** a result,this will restrict the annulus flow area and affect the chip removal in *** obvious solution in such condition is to do round tripping and clean the chip nest which is associated with the risk of injuries,as well as,increasing the none-productive *** the worst case,the poor cleaning and circulation of chips can even end up with the milling string stucking problem in boreholes,consequently long-time fishing *** to the available literatures,hardly any study for identifying the chip shapes and accordingly adapting the operation parameters to the casing milling process environment downhole to keep milling within desired generated chip shapes and sizes could be *** paper presents an encouraging idea to monitor the milling process in real time by utilizing the acoustic emission signals(vibration modes)accompanied with the milling process to identify the desired chip shape and size *** laboratory tests have been carried out to investigate and study the acoustic emission signals accompanying the casing milling process to identify the chip shapes and *** preliminary test results show very good correlation and agreement between the chip length formed during those specific tests and the observed burst events in the measured *** study results have demonstrated the functionality of the new concept,and thus confirmed that it is a very promising idea to

关键词： oil/gas well casing milling Measurement while milling casing milling chips shape detection Acoustic emission accompanied with casing milling operations casing milling experiments

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