... used to validate the model. Lab measurements made with a rotation measuring device are also presented. Upstream Oil & Gas strain range rotation fatigue life Diameter Growth Completion Installation and Operations model prediction axial strain cross-section fatigue test Coiled tubing...

.... Computationally intensive FEA modeling and strain gage measurements were conducted on defect-free tubing, to establish baseline tubing behavior, then repeated with the notch geometry. Strain gages had to be replaced every cycle of loading due to the large strain ranges. The tedious gage installation procedure...

... that has been implemented and is now being used by a significant portion of the CT industry. material model Upstream Oil & Gas fatigue model strain range bias weld model diametrical growth fatigue life stress strain range base material model fatigue test point manufacturer life...

... curvature. After the tubing exits the straightener assembly, the residual bend of the tubing will have been mitigated and the tubing will spring back into a predominantly straight line. However, the reverse bend applied during the straightening process increases the overall strain range experienced...

... testing. This paper will present S-N curves generated for samples in three environments: air, acid, and acid with inhibitor at deflection levels ranging from 0 to 40 mm. Finite element analysis (FEA) was used to correlate deflection to strain range levels of 0.5 to 4.0%. materials and corrosion...

... reordering, or texturing, within the crystal structure of individual steel grains. The lower modulus has important implications with regards to depth estimation, buckling calculation and stuck point calculation. strain range magnitude moduli deformation engineering stress-strain curve unloading...