Transcription of Basic Tubing Forces Model (TFM) Calculation
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Basic Tubing Forces Model (TFM) Calculation
Tech NoteCTES, , Pozos LaneConroe, Texas 77303phone: (936) 521-2200fax: (936) Tubing Forces Model (TFM) CalculationSubject Matter Authority: Ken Newman, Kenneth Bhalla, & Albert McSpaddenOctober 2003 SummaryThe purpose of this document is to describe how Orpheus calculates Tubing Forces . These calculations are needed to determine the stresses in Coiled Tubing (CT) to ensure the safe working stresses are not being exceeded. They also are needed to predict the behavior of the CT in a highly deviated well, to determine if the planned job can be done, or to determine if the job being executed is proceeding as is a Tubing Forces Model (TFM) written specifically for Coiled Tubing (CT). The Basic TFM Calculation is performed by calculating the Forces along the length of a CT string at a specific depth in a well, as the string is being either run into the hole (RIH) or being pulled out of the hole (POOH). This Calculation is performed beginning at the downhole end of the CT string and calculating the Forces on each segment of the string, pro-gressing up the string to the.
Basic Tubing Forces Model (TFM) Calculation Tech Note CTES, L.P. 3 The friction force is calculated by multiplying the normal weight compo-nent by the friction coefficient µ.
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