Nonlinear Dynamics Analysis of a Drillstring-Bit-Wellbore System for Horizontal Oil Well

Zhu, Xuming; He, Youwei; Chen, L.; Yuan, He

doi:10.1166/asl.2012.3275

Cited by 5 publications

(4 citation statements)

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“…ey proved that the yawing force of the bit was also a ected by the good slope. Although it is known that the nite element method is an approximate solution [17][18][19][20][21][22], Bulent et al [23] analyzed the intrinsic frequency based on the interaction mechanism of bending and torsion on beams, and the results agree well with experiments.…”

Section: Introductionmentioning

confidence: 89%

Mechanical Modeling and Oblique Evaluation of a Full Rotation Steering Tool

Yang

Zeng²,

Zhong³

et al. 2022

Scientific Programming

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Directional rotary steerable is one of the key components of modern intelligent drilling, and the analysis of force and deformation in bottom hole assembly is the key to control a well trajectory. Although the introduction of edge calculation will significantly improve the case requirements in engineering application, due to the complexity of directional rotary steerable BHA, such as variable stiffness and discontinuity, few theoretical mechanical models can simultaneously solve the above problems and obtain accurate solutions. In this paper, the inclination angle and diameter of borehole are considered comprehensively. From weight on bit in drilling parameters, assembly structure parameters of multiple variable cross section, discontinuity, stabilizer diameter and position of all sorts of influencing factors, such as the vertical and horizontal bending method combined with the finite element method, a point-type rotary steering BHA is established as a new type of mechanical model, with actual project as an example, through iteration, and the calculated results with the software of numerical verify the correctness of the model. Finally, the model is used to study the bit side force of discontinuous directional rotatory stepping-type BHA, and the effects of offset, weight on bit, and distance between two stabilizers on bit side force are analyzed. The research results provide support for structure optimization and BHA parameter evaluation of directional rotary steerable tools.

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Section: Introductionmentioning

confidence: 89%

Mechanical Modeling and Oblique Evaluation of a Full Rotation Steering Tool

Yang

Zeng²,

Zhong³

et al. 2022

Scientific Programming

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“…According to the force analysis model of the drill string system as shown in Fig. 5, the axial vibration model expression of the horizontal drill string was established 21,22   …”

Section: Mathematical Modelsmentioning

confidence: 99%

Dynamic Characteristics of New Mechanical Rotary Steerable Tool in Directional Drilling

Tian¹,

Tang²,

Xue-hua³

et al. 2022

The International Journal of Acoustics and Vibration

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The characteristics of a drill string system have an essential influence on the performance of directional drilling. The appropriate control method of a drill string is important to drilling efficiency and downhole operation safety. Therefore, based on a new mechanical rotary steerable tool (RST), this paper aims to analyze the Dynamic Characteristics of RST in Directional Drilling. First, considering the thrust force generated by the RST and bottom hole assembly (BHA), the governing vibration equations of a drill string system are established. Furthermore, connected with fields drilling parameters, including the effects of a new RST on a drill bit and wellbore, as the boundary and initial conditions, the dynamic characteristics of a drill string system are compared and studied in directional and straight drilling. The results show that the axial vibration of the drill string increases extremely in directional drilling process, while the weight on bit (WOB) and inclination force change in small range. Moreover, the torque and azimuth force tend to be stable soon, even its initial fluctuations are significantly. Also, the new RST can effectively enhance the steering capacity, increase the drilling efficiency, and improve drill bit force performance. The research results can provide reference for developing directional drilling technologies, including related tool design and optimization.

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“…Using 3D beam element to simulate the drill string system, the beam element is a 2-node element; each node has three translational and three rotational degrees of freedom. Take gyroscopic effect in count and consider the influence of the transverse, rotating moments of inertia and other boundary conditions, the nonlinear dynamic equation of drill string is shown as [4,5]:…”

Section: Dynamic Equationmentioning

confidence: 99%

Nonlinear Dynamic Analysis of Drill String System for Horizontal Oil Well with Different Positions of Stabilizers

Zhao

Zhu

Wang

2014

AMM

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For the horizontal well of petroleum drilling engineering, the horizontal section of drill string was selected as a research object. Collision and friction between drill string and well wall, displacement response on the drill bit and other boundary conditions were considered in this simulated modeling. By using finite element analysis software ANSYS, the dynamic characteristics of horizontal section of drill string were calculated and discussed. The effect of different positions of stabilizers on the vibration characteristics of drill string were studied specially. The calculated results show that the installation positions of stabilizers have remarkable effects on the dynamic characteristics of drill string. It will change the lateral vibration and whirling motion of drill string remarkably. Furthermore, the reasonably installation of the stabilizers can decrease the amplitudes of lateral vibration and transient torque. Those results may provide some guidance for the vibration analysis of drill string system.

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Nonlinear Dynamics Analysis of a Drillstring-Bit-Wellbore System for Horizontal Oil Well

Cited by 5 publications

References 0 publications

Mechanical Modeling and Oblique Evaluation of a Full Rotation Steering Tool

Mechanical Modeling and Oblique Evaluation of a Full Rotation Steering Tool

Dynamic Characteristics of New Mechanical Rotary Steerable Tool in Directional Drilling

Nonlinear Dynamic Analysis of Drill String System for Horizontal Oil Well with Different Positions of Stabilizers

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