Modeling of BHA dynamic behaviors

Santos, Juliana do Couto Vieira Carvalho dos; Priimenko, Viatcheslav; Sugiura, Junichi

doi:10.1007/s13202-013-0093-7

Cited by 1 publication

(1 citation statement)

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“…The basic factors affecting the drilling deflection rate are (Santos et al, 2014): the bit characteristics, the BHA structure, and the RSS dynamics, wellbore geometries, drilling technology and formation properties. BHA is an important factor affecting the ability of the RSS to make the slanting (Sarker et al, 2017;Di et al, 2012). The design of the flex sub is directly related to the mechanical properties and safety of the BHA, which finally affects the realization of the lateral cutting capacity of the RSS.…”

Section: Introductionmentioning

confidence: 99%

Influence of flex-sub on mechanical properties of rotary steerable drilling system

Wang

Xue

et al. 2020

Mech. Sci.

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Abstract. In this paper we analysis of the dynamic model of the Rotary Steerable System (RSS) with a single stabilizer and flex-sub. The drill collar and joint are simplified to obtain suitable bottom-hole assembly (BHA) model of mechanical analysis and finite element analysis. Using the BHA uniform stiffness assumption (ignoring the influence of variable section and variable stiffness of drill collar in BHA), the paper takes a method of the longitudinal and transverse bending continuous beam method to analyse the stress of BHA with RSS with the flex-sub under different inclination angles and curvature conditions. In addition, a dynamic analysis model is proposed, and the dynamic stress of drilling tools with RSS is analysed. Through the software of ANSYS, the finite element analysis of the RSS with the flex-sub is carried out to verify the theoretical results. The influence of flex-sub on the steering drilling performance of RSS is studied, and the optimized parameters of flex-sub design are obtained, which provides useful suggestions for the design of RSS.

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Section: Introductionmentioning

confidence: 99%