... to be used, it can be inconclusive at times. In recent years, multiple papers on torsion, curvature, and well profile energy have been introduced to further describe the nature of the well path. ( Samuel and Liu 2009 ) Torsion seeks to quantify the amount of spiral present along a well trajectory providing...

... Abstract This paper proposes a new analytical derivation to incorporate bending and torsion into collapse calculation, further pushing the already existing approach of combined loading equivalent grade proposed in API TR 5C3 (2019) Clause 8.4.6 Eq. (42) for axial stress and internal pressure...

... In the well path design, curvature or dogleg is widely used to describe how the well path is bending. It is used to calculate the total curvature between the survey stations or local dogleg, depending on the spread of the survey measurements. Wellbore torsion is another important quantifiable...

.... The reliability of the drillstring with the BHA consisting of several complex tools is important. Excessive torsional vibrations will result in downhole tool failures. The torsional response of the string also defines the operating limits of the system as a whole. This requires identification of the forcing...

.... To avoid curvature and torsion discontinuities between sections, curvature-bridge curves, or transition curves called clothoid spirals can be used. This paper presents a new mathematical formulation for well-path designs using curvature bridges. Results show that the essential elements in planning...

... calculation torsion torque-drag model wellbore drag calculation Upstream Oil & Gas torque calculation pipe vector formulation drillstring design trajectory shear force assumption contact force equation Introduction Generally speaking, what do we mean by "torque-drag modeling?" Drag...

..." (9.04m) from top and bottom ends of facility respectively. Induced Torsion Model The induced torsion in a rod buckled into right-hand helical shape was derived by Mitchell 2 as: (1) M t = − F   r 2 β 2 α where "-" sign indicates a left-hand direction...

... ABSTRACT In field operations, the make-up torque of tubular connections depends on compensated axial weight and environmental temperature. Also, in running operations, torsion can be applied to casings with connections under loading. This paper deals with the torque resistance of tubular...

... connection reliability reliability diameter drillstring design torsion IADC/SPE 27535 Optimization of Rotary-Shouldered Connection Reliability and Failure Analysis Anatoly Baryshnikov, Adelmo Schenato, Angelo Ligr~ne, and Paolo Ferrara, AGIP SpA IADC and SPE Members Copyright 1994, IADC/SPE Drilling...