A generalized quasi-static model of drill string system

Gao, Deli; Wei, Shaolei; Li, Xin

doi:10.1016/j.jngse.2015.01.038

Cited by 14 publications

(4 citation statements)

References 18 publications

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“…The natural frequency (Jogi et al, 2002) can be obtained by analyzing the dynamic response of the structure when the external load is zero (in the dynamic equilibrium equation P = 0). In Abaqus software, the vibration mode is calculated for the undamped system.…”

Section: Mathematical Model Of Drillstring Dynamicsmentioning

confidence: 99%

“…The finite element computer program to analyze the behav-ior of bottom-hole assemblies of drill collars, stabilizers and drill bit is discussed. Wilson and Heisig (2015), Schmalhorst and Neubert (2003), Jogi et al (2002) and utilized both differential equation solution and finite element method to analysis the drillstring dynamics, and some of their work has formed commercial software. In most cases analytical models are used to get a fast overview of natural axial and torsional frequencies of drillstrings in straight boreholes.…”

Section: Introductionmentioning

confidence: 99%

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Dynamic Reliability Analysis of Rotary Steering Drilling System

et al. 2019

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Abstract. Vibration and high shock are major factors in the failure of downhole tools. It is important to study the causes of vibration and shock formation to prevent failure of the drillstring and bottom hole assembly (BHA). At present, it is generally recognized that the vibration of drillstring is the main reason for the failure, especially the lateral vibration. In this paper, the bottom tool of Rotary Steering Drilling System (RSS) calculation model was established based on the secondary development of ABAQUS software. Starting from the initial configuration of drilling tool, considering the contact impact of drilling tool and borehole wall, the dynamic excitation of guide mechanism and the drilling pressure, torque, rotational speed, gravity, buoyancy, drilling fluid damping. The dynamic characteristics of the inherent frequency and dynamic stress of the bottom hole assembly (BHA) were calculated and analyzed, and risk assessment method based on the quantitative vibration intensity was established. The reliability of typical drilling tool is evaluated, which provides a reference for the optimization design of BHA of Rotary Steering Drilling System.

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Section: Mathematical Model Of Drillstring Dynamicsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dynamic Reliability Analysis of Rotary Steering Drilling System

et al. 2019

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“…Various models are used in oil industry to estimate the forces on drillpipes [1][2][3][4][5][6]. These tools provide various benefits, such as estimating torsional and axial drag, bending moments, load distribution along the drillpipe and critical buckling loads for a given hole-pipe-wellbore combination.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

“…Obtain the description of the well at that point (a, b, and β). 4. Extract the displacement (u) and its direction (α) of the considered node.…”

Section: Algorithmmentioning

confidence: 99%