Experimental study and mechanism analysis of the motion states of bottom hole assembly during rotary drilling

Li, Wei; Huang, Genlu; Ni, Hongjian; Fan, Yu; Huang, Bin; Jiang, Wu

doi:10.1016/j.petrol.2020.107859

Cited by 24 publications

(4 citation statements)

References 25 publications

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“…Various methods, including finite element simulation analysis, optimization of the stabilizer positions, and determination of the optimal BHA position, have been used to reduce the vibrations generated during the operation of steering tools [4][5][6][7][8][9]. In addition, previous studies have analyzed the drill string mechanics of static push-the-bit rotary-steering tools [10][11][12]. From a fieldapplication perspective, pointing tools exhibit several advantages over push-the-bit rotary-steering tools, such as improved borehole quality and independence from the wellbore during operation [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Inclination Build Rate of a Point-The-Bit Rotary-Steerable Tool

Wang,

Tang,

et al. 2024

J. Phys.: Conf. Ser.

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The combination of a rotary-steerable system (RSS) and power screws has become the main drilling tool for the efficient exploration and development of unconventional oil and gas. However, the application of point-the-bit (POB) rotary-steerable tools in directional drilling subjects spindle bearings to continuous alternating stress, which can lead to fatigue failure. In this study, numerical analysis and simulation are employed to guide the engineering application of rotary-steerable tools, particularly in the field of oil and gas exploitation. The structural composition and steering principles of rotary-steerable tools are analyzed. The influence of the structural parameters of the spindle on the deflection capacity of the tool is analyzed, and the optimal structural parameters are selected. Based on the results, the recommended distances between the various components of the tool could be obtained. Moreover, the maximum deflection capacity increases with torque when the WOB (weight-on-bit) is constant. Similarly, at constant torque, the maximum deflection capacity increases with the WOB. Overall, the WOB has a greater influence on the maximum deflection capacity than torque. To ensure the safe operation of the spindle, the WOB and torque must be within 200 kN and 20 kN·m, respectively. The findings of this study provide valuable insights into the safe application of POB rotary-steerable tools.

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Section: Introductionmentioning

confidence: 99%

Inclination Build Rate of a Point-The-Bit Rotary-Steerable Tool

Wang,

Tang,

et al. 2024

J. Phys.: Conf. Ser.

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“…The buckling response of drill collar with lateral vibration was considered, and the relationship between BHA lateral vibration characteristics and mechanical parameters were revealed by calculation results, which is of great significance for parameter optimization. Li et al 9,10 established a lateral dynamic model of drill string in a highly inclined well by finite element theory, and the effects of rotational speed, WOB, well deviation angle, and friction coefficient on the lateral vibration of drill string are verified. On the basis of previous studies on vertical and curved wells, Cai et al 11 established a dynamic model of BHA in curved boreholes by discrete element method, the numerical results were obtained by solving differential equations with generalized alpha method; The accuracy of theoretical model and numerical simulation was verified by field measurement data, which provided ideas and schemes for the study of drill string dynamics in curved wells.…”

Section: Introductionmentioning

confidence: 99%

Study on lateral vibration characteristics of BHA with double-span drill collar

Tao,

Meng,

Huang

et al. 2024

Advances in Mechanical Engineering

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The severe vibration of BHA directly affect the drilling efficiency, borehole trajectory, and wellbore quality. Therefore, it is crucial for developing dynamic mechanics of drill string system by studying the mechanical behavior of BHA. In this paper, considering the continuity condition of double-span drill collar, the expression of lateral vibration of drill collars is firstly obtained by using the assumption mode method. Then, the lateral vibration equation of double-span drill collar is derived by Lagrange equation. Finally, a self-programming model is established based on dynamic mechanics of drill string system, the lateral vibration characteristics of double-span drill collar in four different types of BHA is further determined by the fourth-order Runge-Kutta algorithm. It is obviously found that the lateral vibration is enhanced with increasing the length of drill collar; the rotation speed of BHA, weight on bit (WOB), and the size of stabilizer have a significant influence on the lateral vibration of drill collar. In the practical application, the lengths of the first-span and the second-span drill collar are given as 10 and 19 m, respectively; and the stabilizer diameter approached to bit diameter is recommend in practical gas drilling engineering; under WOB of 10–40 kN, the rotation speed of the drilling string should be controlled nearby 60 r/min. The theoretical investigation is a guidance for structure design of BHA and optimization of drilling parameter.

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“…Cheng et al employed shell elements while Cai et al utilized finite beam elements to establish drillstring dynamics models; they focused on analyzing how rotational speed, WOB, and friction coefficient affect whirling and motion trajectories [25,26]. Li et al, employing principles such as minimum energy principle along with Buckingham π theorem-based similarity criteria, constructed numerical models as well as laboratory test benches to investigate how rotational speed, WOB, and friction coefficient impact lateral vibrations [27].…”

Section: Introductionmentioning

confidence: 99%

Research on the Influence of Deep-Water Drilling Risers on Drillstring Motion Trajectory and Vibration Characteristics

Hai,

He,

Xue

2024

Machines

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The swing of the riser in deep-water drilling can significantly impact the drill string. In this study, we establish a riser model that considers the combined disturbance of periodic dynamic wind and wave loads. By coupling it with the drill string model, we develop a dynamic model for deep-water drilling systems. Through analyzing multiple sets of different drilling parameters, we examine displacements and impact forces at various positions along the drill string system. Specifically, our focus lies on velocity, acceleration, and rotational speed information of BHA. We investigate how WOB and rotational speed influence motion trajectory and vibration characteristics of the drill string within the dynamic model of deep-water drilling systems. Simulation results reveal slight differences in whirling trajectories between inside the riser and below mud line for the drill string. Rotational speed has a greater impact on the drill string compared to WOB; higher rotational speeds lead to increased collision forces between the drill string system and both riser and wellbore. Our findings identify specific combinations of WOB and rotational speed parameters that can stabilize drilling operations within dynamic models for deep-water drilling systems. These research results provide valuable insights for adjusting WOB and rotational speed parameters in deep-water drilling.

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Experimental study and mechanism analysis of the motion states of bottom hole assembly during rotary drilling

Cited by 24 publications

References 25 publications

Inclination Build Rate of a Point-The-Bit Rotary-Steerable Tool

Inclination Build Rate of a Point-The-Bit Rotary-Steerable Tool

Study on lateral vibration characteristics of BHA with double-span drill collar

Research on the Influence of Deep-Water Drilling Risers on Drillstring Motion Trajectory and Vibration Characteristics

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