Impact of unstable drilling on energy efficiency of drill rotor drive

Ershov, Mikhail; Feoktistov, E.A.

doi:10.25018/0236_1493_2022_1_0_148

Cited by 2 publications

(2 citation statements)

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“…Quite often, damage to synchronous electric motors causes accidents [6,8,12]. Every year, from 6 to 13% of electric operational motors with voltages above 1 kV get out of service [25], and in 80 to 95% of cases, the stator winding is damaged. In operation, there were cases of damage in the frontal parts of the SM stator winding from dynamic forces when the motor fell out of synchronism as a result of a deep voltage drop during an unsuccessful autorecloser in the 110 kV network.…”

Section: Features Of Power Supply Schemes For Water Supply and Sanita...mentioning

confidence: 99%

Mathematical Calculation of Synchronous Electric Motors Dynamic Stability

Pupin,

Orlov

2023

Mathematics

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This paper considers the equipment and power supply schemes for urban water supply, heat supply and sewerage pumping stations. Mathematical calculations of the impact of the static and full centrifugal pumps pressure ratio on the dynamic stability of synchronous electric motors were carried out. An analysis of the influence of pump parameters and engine load on the run-down parameters and drive stability during power shutdowns was carried out. It has been theoretically proven and practically confirmed that ensuring the stability of pumping station drives and the reduction in enterprise losses during various short-term disruptions in power supply networks can be provided by means of a high-speed backup source with a response time of less than 9 ms, dynamic voltage dip compensators with a response time of less than 3 ms and uninterruptible power supply sources.

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Section: Features Of Power Supply Schemes For Water Supply and Sanita...mentioning

confidence: 99%

Mathematical Calculation of Synchronous Electric Motors Dynamic Stability

Pupin,

Orlov

2023

Mathematics

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“…In subsystem Tb-Subsystem the presence in the drill string of not only torsional, but also longitudinal vibrations, which change the axial load on the bit during drilling, is taken into account; modeling of such oscillations was carried out according to the harmonic law [15]. The formula for determining the resulting drag moment on the bit is [8]…”

Section: U R T S I L I K T K P R T S I L I K T K P K R I T S P K R I ...mentioning

confidence: 99%

A complex model of a drilling rig rotor with adjustable electric drive

Ershov

Komkov

Feoktistov

2023

PMI

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A modified mathematical model of an asynchronous electric drive of the rotor – a drill string – a bit – a rock is considered and implemented, which develops and generalizes the results of previously performed studies. The model includes the following subsystems: a model of an asynchronous drive with vector control; a model of formation of the resistance moment at the bottom of the bit, taking into account the peculiarities of the interaction between the bit and the rock; a model of a multi-mass mechanical part that takes into account the deformation of the drill string; subsystem for the drilling rig energy-technological parameters formation. The integrated model makes it possible to calculate and evaluate the selected drilling modes, taking into account their electro-mechanical, energy and technological efficiency and the dynamics of drilling processes. The performed computer simulation of drilling modes confirmed the possibility of a stick-slip effect accompanied by high-frequency vibrations during bit stops, which may change the direction of rotation of the bit, its accelerated wear and unscrewing of the drilling tool. Long bit stops lead to a significant decrease in the average bit rotation speed, which can explain the decrease in the ROP and increase in energy consumption when drilling in the zone of unstable bit rotation. The model can be used as a base for further improvement of rotary drilling control systems.

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Impact of unstable drilling on energy efficiency of drill rotor drive

Cited by 2 publications

References 0 publications

Mathematical Calculation of Synchronous Electric Motors Dynamic Stability

Mathematical Calculation of Synchronous Electric Motors Dynamic Stability

A complex model of a drilling rig rotor with adjustable electric drive

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