Dynamics of Pipeline Pulling Process By Horizontal Directional Drilling

Торопов, В С; Tamer, Olga; Toropov, S Yu; Nikiforov, N A

doi:10.1088/1757-899x/154/1/012031

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2018

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“…This fact does not allow optimizing the profile of the well by the criterion of weight or distributed load [4]. At the same time, the main force component of the pipeline movement resistance in a curved well is the normal force acting on the borehole wall from buoyancy forces [5].…”

Section: Methodsmentioning

confidence: 99%

Reduction of movement resistance force of pipeline in horizontal curved well at stage of designing underground passage

Торопов

Toropov

2018

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract.A method has been developed to reduce the resistance to movement of a pipeline in a horizontal curved well in the construction of underground passages using trenchless technologies. The method can be applied at the design stage. The idea of the proposed method consists in approximating the trajectory of the designed trenchless passage to the equilibrium profile. It has been proved that in order to reduce the resistance to movement of the pipeline arising from contact with the borehole wall, the profile of its initial and final sections must correspond, depending on the initial conditions, to the parabola or hyperbolic cosine equation. Analytical dependences are obtained which allow supplementing the methods of calculation of traction effort in trenchless construction for the case when the profile of the well is given by an arbitrary function.

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Section: Methodsmentioning

confidence: 99%