Stick-Slip Vibration Suppression in Drill String Using Observer-Based LQG Controller

Riane, Rami; Doghmane, Mohamed Zinelabidine; Kidouche, Madjid; Tee, Kong Fah; Djezzar, Sofiane

doi:10.3390/s22165979

Cited by 16 publications

(2 citation statements)

References 38 publications

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“…When drilling oil and gas wells, technical and economic indicators are determined, for the most part, by the ef ficiency of the rockdestructive tool -mechanical speed and bit penetration [1][2][3]. Therefore, great attention is always paid to issues of drill string dynamics.…”

Section: Introductionmentioning

confidence: 99%

Adjustment of the axial load on the bit when hole deepening by using the screw mechanism

Svitlytskyi

Sahala

2023

TAPR

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The object of the research is a screw mechanism for adjusting the axial load on the bit during a hole deepening. Mathematical modeling of dynamic processes that occur in the drill string during the hole deepening in deep wells is considered. It is shown that in the process of hole deepening, the longitudinal oscillations are proportional in their intensity to the torsional ones. Obtained boundary conditions for mathematical models of the column with the use of a shock absorber or a screw amplifier. In the course of research, it was found that the screw working mechanism of the axial load creates a relationship between the axial load on the bit and the torque on the screw. This makes it possible to install safety devices that limit the torque of the drive shaft (reciprocating engine, rotor). It is shown that various types of energy supplied to the punch, which are transformed by the punching motor and amplified due to the axial (screw) amplifier installed above the bit, ensure the rotary-progressive movement of the ball bit and increase the drilling performance. It was determined that the obtained dependencies take into account the change in time of the axial load and torque depending on the parameters of the axial amplifier and the geological and technical conditions of drilling and the arrangement of the bottom of the drill string. The research results will be useful to scientists and specialists of the oil and gas industry during the physical modeling of the processes of adjusting the axial load on the bit during a hole deepening by using a screw mechanism.

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Section: Introductionmentioning

confidence: 99%

Adjustment of the axial load on the bit when hole deepening by using the screw mechanism

Svitlytskyi

Sahala

2023

TAPR

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show abstract

“…Great attention is always paid to issues of drill string dynamics when drilling oil and gas wells. Therefore, the technical and economic indicators are determined, for the most part, by the efficiency of the rock-crushing toolmechanical speed and penetration on the bit [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Effect of vibration dampers on the dynamic state of a drill string

Svitlytskyi,

Iagodovskyi,

Bilenko

2023

TAPR

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The object of research is the drill string bottom structure using the correcting devices of drilling modes to control the dynamics of the drill string. The work is aimed at the study of longitudinal, torsional and transverse oscillations when adjusting the axial load on the bit by using a drilling shock absorber with a two-link characteristic. A dynamic model of the drill string during the drilling process is presented, which is a concentrated-continuous nonlinear system that interacts with the ball bit and the downhole engine as a source of energy. It is shown that elastic oscillations of all types affect the interaction of the bit with the outcrop rock. In order to evaluate drilling performance, it is necessary to take into account not only longitudinal, torsional and transverse oscillations, but also parametric oscillations, which are associated with the deformation of the weighted drill pipe under axial loads and during its rotation in the process of deepening the hole. It was found that transverse vibrations of weighted drill pipes, as a flexible element, during the drilling process are, as a rule, parametric in nature. They lead to the appearance of additional stresses in the elements of the column and, as a result, to the acceleration of their destruction and accelerated wear of the bit arms and rolling bearings. It is proved that in the future, for the development of dynamic models, it is necessary to take into account their hydrodynamics and the type, design and parameters of the applied punching elements. The obtained research results can be applied in practice in the process of designing the structure of the drill string bottom structure (DSBS) using correcting devices of drilling modes to control the dynamics of the drill string, by using a drilling shock absorber with a two-link characteristic in order to correct the axial load on the bit.

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Experimental and numerical investigation on the relationship between stick–slip vibration and rate of penetration

Huang,

Ni,

Zhang

et al. 2024

Nonlinear Dyn

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Stick-Slip Vibration Suppression in Drill String Using Observer-Based LQG Controller

Cited by 16 publications

References 38 publications

Adjustment of the axial load on the bit when hole deepening by using the screw mechanism

Adjustment of the axial load on the bit when hole deepening by using the screw mechanism

Effect of vibration dampers on the dynamic state of a drill string

Experimental and numerical investigation on the relationship between stick–slip vibration and rate of penetration

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