Stick-slip vibration behaviors of BHA and its control method in highly-deviated wells

Liu, Weiji; Yang, Fenghuan; Zhu, Xiaohua; Chen, Xingwu

doi:10.1016/j.aej.2022.01.039

Cited by 8 publications

(5 citation statements)

References 24 publications

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“…High drag along the wellbore due to elevated torque can result in sticking, particularly in deviated or horizontal wells. Weiji et al study [9] focused on controlling stick-slip vibration behavior in BHA. The researchers devised a finite element model to examine the characteristics of stick-slip vibrations.…”

Section: Torque and Dragmentioning

confidence: 99%

“…If the parts are not synchronized effectively, irregular forces may be applied to the bit, causing stick-slip. To study the stick-slip vibration behaviors of the drill bit and BHA, Weiji et al built a finite element model (FEM) of a highly deviated well, which comprises a drill string system, a borehole, a PDC bit, and a rock model [9]. In order to control the stick-slip vibration of BHA, they proposed the torsional impact drilling technique.…”

Section: Bha Configurationmentioning

confidence: 99%

“…Relating torque to applied torque and friction. M = T(x, t) − T friction (9) In this case, T(x, t) represents the applied torque to the drill string at position x and time t, and T friction represents the frictional torque.…”

Section: Torsional Vibrationmentioning

confidence: 99%

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Investigation and Analysis of Influential Parameters in Bottomhole Stick–Slip Calculation during Vertical Drilling Operations

Ejike,

Obuobi,

Avinu

et al. 2024

Energies

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The critical factors that affect bottomhole stick–slip vibrations during vertical drilling operations are thoroughly investigated and analyzed in this research. Influential factors, such as rotation speed, weight on bit (WOB), bottom hole assembly (BHA) configuration, and formation properties, were studied in order to understand their part in the stick–slip phenomena. The analysis is based on a thorough review of previous research conducted on stick–slip drilling vibrations. A mathematical model was created that not only explains axial vibrations but also includes the torsional vibrations present in stick–slip occurrences, which helps with understanding the stick–slip phenomena better. This model can be used as an analytical tool to predict and evaluate the behavior of drilling systems under various operational circumstances. Furthermore, two drilling tests using a WellScan simulator were performed to validate the research findings and assess mitigation techniques’ viability. These test scenarios reflect the stick–slip vibration-producing situations, allowing us to test mitigation strategies. The finding of this study shows the effectiveness of two tactics for reducing stick–slip vibrations. First was the reduction of WOB, which successfully lowered the occurrence of stick–slip vibrations. The second was the increase in the rotation speed, which helped to control the stick–slip problem and increased the drilling speed. This study explains the complex dynamics of stick–slip vibrations during vertical drilling and offers practical, tried-and-true methods for reducing their adverse effects on drilling operations.

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Section: Torque and Dragmentioning

confidence: 99%

Section: Bha Configurationmentioning

confidence: 99%

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Investigation and Analysis of Influential Parameters in Bottomhole Stick–Slip Calculation during Vertical Drilling Operations

Ejike,

Obuobi,

Avinu

et al. 2024

Energies

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“…In this part, considering a suitable reaching law in the discrete space, the control input will be designed considering the strict constraints governing the actuation system. Considering the variable s k À 1 ð Þ as the momentary tracking error shown in equation (15), the control input is calculated to force the tracking error to follow the reaching law. Equation (16) represents the characteristic equation of the reaching law.…”

Section: Model-based Controller Designmentioning

confidence: 99%

“…14 For example, in oil–gas drilling, the stick-slip phenomenon is one of the most important considerations. 15 Due to the unknown environment surrounding the drill and the nonlinear friction force, the behavior of the drill will also be nonlinear. In the work by Hong et al, 16 the nonlinear behavior of the drill at the end of the hole is identified using the Kalman filter, and the linear–quadratic–Gaussian (LQG) controller is used to prevent stick-slip vibrations.…”

Section: Introductionmentioning

confidence: 99%

Compensation of friction and stick-slip uncertainties in trajectory tracking control of servo DC machines considering actuation constraints

Ebrahimi,

Homaeinezhad

2023

Proceedings of the Institution of Mechanical Engineers, Part I:

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Nowadays, electric motors are common in many precision instrument industries that require high-precision control. If a suitable model of a servo system is available, accurate results can be obtained using a model-based control algorithm. The DC motor is one of the most widely used systems in precision industries, for which a high-precision controller can be designed using its mathematical model with feedback on position and velocity. In such systems and other rotating systems, it is necessary to consider friction in the control system design. Friction enters the system in the form of resistant force or torque in both static and kinetic states, which causes uncertainty in the dynamic modeling of the system, the stick-slip phenomenon, and creates a deadzone in the actuation system. In this article, considering a switching dynamic model for different states of a system subject to friction which has a saturation limit on the control input and an actuation system dependent on the angular velocity feedback, first, the stable reaching laws in two modes of position control and velocity control for different dynamic model switch modes are defined. Then, the control input that forces the tracking error to follow the corresponding reaching law for each control mode is calculated. In the next step, according to the limitations of the actuation system, such as saturation and deadzone, using the filtering mechanism and optimal search for each control mode, the desired values are filtered and it is guaranteed that the control input will be chosen within the allowed range. Finally, using the optimal switching mode selection mechanism, the optimal control mode is selected and the voltage is calculated as the next step input.

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Stabilization of Second-Order Systems Using PI Controllers with Delayed Proportional and Integral Parts

Strmiska

Pekař

Araújo

2023

Lecture Notes in Networks and Systems

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Stick-slip vibration behaviors of BHA and its control method in highly-deviated wells

Cited by 8 publications

References 24 publications

Investigation and Analysis of Influential Parameters in Bottomhole Stick–Slip Calculation during Vertical Drilling Operations

Investigation and Analysis of Influential Parameters in Bottomhole Stick–Slip Calculation during Vertical Drilling Operations

Compensation of friction and stick-slip uncertainties in trajectory tracking control of servo DC machines considering actuation constraints

Stabilization of Second-Order Systems Using PI Controllers with Delayed Proportional and Integral Parts

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