«Onshore and offshore oil and gas well construction»

Study of stress-strain state of a polymer-reinforced small-diameter pipeline

UDC: 621.88
DOI: -

Authors:

¹ Ufa State Petroleum Technical University, Ufa, Russia

Keywords: polymer reinforced pipeline, wire, pressure, stress, deformation, depressurization, numerical modeling, temperature

Annotation:

Polymer reinforced pipelines have found wide application at hydrocarbon production sites in the systems for supplying chemical reagents, gas withdrawal, water removal from the of gas well bottoms and downhole valve devices. The authors of the article present studies of the stress-strain state of the polymer reinforced pipeline SKT-5/15 used at oil and gas production sites. A methodological approach based on modeling and numerical experiments is outlined. The equations of the mathematical model were solved using the finite element method in the COMSOL Multiphysics numerical simulation environment. The design of a pipeline including a polymer and reinforcing wire is described. The influence of the diameter of the reinforcing wire, radial compression, and medium temperature on the depressurization of a pipeline loaded by internal pressure was studied. The recommended minimum diameter of the reinforcing wire is 0,5 mm. At the operational pressure of 15 MPa, the maximum permissible radial deformation (compression) is set to 55 %. An operating temperature limit of 90 °C has been introduced.

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