Serhii Landar

Mr. Serhii Landar


Research Focus & Metrics

Academic Career Length

4Years (2023-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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9 August 2024 in Vibration
Verified
Journal Article
Open access
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SLSerhii Landar
Serhii Landar
Andrii VelychkovychAndrii Velychkovych
Andrii Velychkovych
Liubomyr RopyakLiubomyr Ropyak
Liubomyr Ropyak
AAAndriy Andrusyak
Andriy Andrusyak
Optimization of drilling processes for oil and gas and geothermal wells requires the effective use of mechanical energy for the destruction of rocks. When constructing a well, an important indicator of the drilling stage is the mechanical speed. Therefore, when performing drilling operations, operators usually use blade bits of an aggressive design and often use forced drilling modes. Drill bits under forced operation modes generate a wide range of vibrations in the drilling tools; in turn, a drill string, being a long-dimensional deformable body, causes the development, amplification, and interconnection of vibrations of different types. Vibration loads reduce the technical and economic indicators of drilling, with destructive effects on drill string elements, and cause complications and emergencies. The authors initiated the creation of an informational and analytical database on emergency situations that occurred as a result of excessive vibrations of the drill string during the construction of deep wells in the deposits of the Dnipro–Donetsk Basin. For the first time, the suitability and effectiveness of using the Smart 4 controller (“Innova Power Solutions”, Calgary, Canada) for monitoring the vibration load of the drilling tool was tested in industrial conditions, while the controller was used as a separate element in the drill string. A special module was developed for the reliable installation of the Smart 4 controller, with a power battery in the layout of the lower part of the drill string. During the testing of the proposed device for measuring vibrations in the process of drilling an inclined well, verification of the registered data was carried out with the help of a high-cost telemetry system. The implementation of the proposed innovation will allow each operator to assess the significance of the impact of vibrations and shocks on the production process and, if necessary, adjust the drilling modes or apply vibration protection devices. In addition, service departments that operate and repair drilling equipment will be able to obtain an evidence base for resolving warranty disputes or claims.

1 December 2023 in PRECARPATHIAN BULLETIN OF THE SHEVCHENKO SCIENTIFIC SOCIETY. Number
Verified
Journal Article
Open access
PDF file
VMV. M. Moisyshyn
V. M. Moisyshyn
VVV. І. Vekeryk
V. І. Vekeryk
SLSerhii Landar
Serhii Landar
A generalized mathematical model of the torsional vibrations of the drilling columnis proposed, the composition of which includes support-centering elements, an elastic coupling, and a screw drilling motor. The portable movement of the drilling columnis taken to be a steady rotational movement with a given angular velocity and the relative movement is taken to be oscillations disturbed by the bit. The model allows you to determine the relative and transfer components of the angle of rotation, torque and tangential stress in the cross sections of the column.