A Study of the Parametric Variations Influences on Stick-Slip Vibrations in Smart Rotary Drilling Systems

Mendil, Chafiaa; Kidouche, Madjid; Doghmane, Mohamed Zinelabidine

doi:10.1007/978-3-030-63846-7_67

Cited by 15 publications

(6 citation statements)

References 12 publications

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“…To eliminate the chattering effects [34], other functions were considered too. Figure 5(a) shows the angular velocities of the top drive and that of the drill bit with a sliding mode controller by using saturation function given by (14). By using an equivalent saturation control, the performance of the system remained the same as in Figure 4(a), but the chattering phenomenon has been eliminated as illustrated in Figure 5(b) so that the control system was improved too.…”

Section: Sliding Mode Controller Resultsmentioning

confidence: 96%

“…Therefore, the generalized model of rock-bit interaction dynamic was used in the model of the system in order to design three controllers: classic PID controller [11], sliding mode controller [12], and hybrid sliding PID controller [13], they were designed to mitigate the stick-slip vibrations. The main advantages of the latter controller is its ability to eliminate the chattering phenomenon, the controllers' performances were principally evaluated based on their response time because the dynamic of the vibrations is very fast in comparison to manual human intervention in the industrial rotary drilling systems [14]. Besides, the robustness of the hybrid controller was checked accordingly to parametric variations and monitoring, which guarantees our controller efficiency even with structured disturbances.…”

Section: Introductionmentioning

confidence: 99%

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Hybrid sliding PID controller for torsional vibrations mitigation in rotary drilling systems

Mendil¹,

Kidouche²,

Doghmane³

2021

IJEECS

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During the drilling process, the drilling system devices can be exposed to several types of phenomena incited by lateral, axial, and torsional vibrations. The latter can lead to severe damages if they are not efficiently controlled and quickly mitigated. This research work is focused on the torsional vibrations, which are stimulated by the nonlinear dynamical interaction between the geological rocks and the drill bit. Wherein, a model with three degrees of freedom was designed to demonstrate the severity of the stick-slip phenomenon as consequence of torsional vibrations. The main objective of this study was to design a robust controller based on hybridizing a conventional PID controller with sliding mode approach in order to mitigate rapidly the torsional vibrations. Moreover, a comparative study between PI, PID and sliding mode controllers allowed us to emphasize the effectiveness of the new hybrid controller and improve the drilling system performances. Furthermore, the chattering phenomenon in the sliding surface was overcome by using the saturation function rather than the sign function. The obtained results proved the usefulness of the proposed controller in suppressing the stick-slip phenomenon for smart industrial drilling systems.

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Section: Sliding Mode Controller Resultsmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Hybrid sliding PID controller for torsional vibrations mitigation in rotary drilling systems

Mendil¹,

Kidouche²,

Doghmane³

2021

IJEECS

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“…In order to be able to implement simulations, it was necessary to set the numerical values for different constants, the parameters calculated in (Mendil et al, 2021b) have been considered, where…”

Section: Resultsmentioning

confidence: 99%

Rock–bit interaction effects on high-frequency stick-slip vibration severity in rotary drilling systems

Mendil

Kidouche

Doghmane

et al. 2021

MMMS

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PurposeThe drill string vibrations can create harmful effects on drilling performance because they generate the stick-slip phenomenon which reduces the quality of drilling and decreases the penetration rate and may affect the robustness of the designed controller. For this reason, it is necessary to carefully test the different rock-bit contact models and analyze their influences on system stability in order to mitigate the vibrations. The purpose of this paper is to investigate the effects of rock-bit interaction on high-frequency stick-slip vibration severity in rotary drilling systems.Design/methodology/approachThe main objective of this study is an overview of the influence of the rock-bit interaction models on the bit dynamics. A total of three models have been considered, and the drilling parameters have been varied in order to study the reliability of the models. Moreover, a comparison between these models has allowed the determination of the most reliable function for stick-slip phenomenon.FindingsThe torsional model with three degrees of freedom has been considered in order to highlight the effectiveness of the comparative study. Based on the obtained results, it has been concluded that the rock-bit interaction model has big influences on the response of the rotary drilling system. Therefore, it is recommended to consider the results of this study in order to design and implement a robust control system to mitigate harmful vibrations; the practical implementation of this model can be advantageous in designing a smart rotary drilling system.Originality/valueMany rock-bit functions have been proposed in the literature, but no study has been dedicated to compare them; this is the main contribution of this study. Moreover, a case study of harmonic torsional vibrations analysis has been carried out in well-A, which is located in an Algerian hydrocarbons field, the indices of vibrations detection are given with their preventions.

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“…This time the system's inputs are as follows: a constant supply voltage of 650 V with a constant Wob of about 103 kN as shown in Figure 23a,b [49]. However, a variation of the parameters, namely resistance (r), inductance (l), length, and mass of string, has been applied.…”

Section: Scenario6: Parametric Variationmentioning

confidence: 99%

Observer-Based H∞ Controller Design for High Frequency Stick-Slip Vibrations Mitigation in Drill-String of Rotary Drilling Systems

et al. 2022

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The drilling process is among the most crucial steps in exploration and production activities in the petroleum industry. It consists of using mechanical mechanisms to crush rocks by the drill bit to pass through the different geological layers. The drill-string continuously transforms the rotational movement from the top drive motor to the drill bit through the drill pipes. Due to the strong interactions with the rocks, aggressive vibrations can arise in the drill-string in its three dimensions, and consequently, this may create three types of synchronous vibrations: axial, lateral, and torsional. The severe status of the latter is known as the stick-slip phenomenon, and is the most common in rotary drilling systems. Based on field observations, it has been inferred that the high frequency stick-slip vibrations may lead to drill-string fatigues and even to premature rupture. In the best case, it reduces the drilling efficiency by decreasing the rate of penetration, due to which the drilling operations become proportionally expensive. The main novelties of this research work are the design of an H∞ observer-based controller to mitigate the high frequency stick-slip vibrations, and the quantitative analysis of the vibrations’ severity for ten degrees of freedom model. The observer is designed to estimate the non-measurable rotational velocity of the drill bit due to the severity of the vibrations, while the controller is dedicated to suppressing the vibrations by using the top drive inputs. Thus, many scenarios have been considered to test and analyze the observer performance and the controller robustness. Furthermore, a comparison with the LQG observer-based controller has been conducted, where H∞ has demonstrated better efficiency in suppressing the stick-slip vibrations under unstructured perturbations.

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A Study of the Parametric Variations Influences on Stick-Slip Vibrations in Smart Rotary Drilling Systems

Cited by 15 publications

References 12 publications

Hybrid sliding PID controller for torsional vibrations mitigation in rotary drilling systems

Hybrid sliding PID controller for torsional vibrations mitigation in rotary drilling systems

Rock–bit interaction effects on high-frequency stick-slip vibration severity in rotary drilling systems

Observer-Based H∞ Controller Design for High Frequency Stick-Slip Vibrations Mitigation in Drill-String of Rotary Drilling Systems

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