RESEARCH OF POWER IMPULSES TRANSFER THROUGH THREADED CONNECTIONS OF THE DRILL-STRING DURING ROTARY-PERCUSSION DRILLING OF PILOT HOLES FOR TRENCHLESS PIPELINE LAYING

The relevance of the research.Pilot wells for horizontal directional drilling can be attributed to slim holes that are widely used in mining, in particular, for detailed exploration and underground development of non-ferrous metal ores, for degassing mine workings of coal mines, as well as in a lot of other industries to limit the diameter of a hol

Unlike imaging in air, underwater panoramic imaging faces great challenges arising from water pressure and diminished light, necessitating special lens packaging and focused underwater illumination.The processing of underwater images from multiple channels necessitates adaptations to existing image processing algorithms to mitigate color cast, nois

The study examines the impacts of entrepreneurship on income inequality in a panel of 29 Sub-Saharan African countries spanning from Dust Bags 2004 to 2020.The paper employs a dynamic heterogeneous panel approach to differentiate between long-run and short-run impacts of entrepreneurship on income inequality.The findings establish a robust and dire

The increasing penetration of wind power in the grid has driven the integration of wind farms with power systems that are series-compensated to enhance power transfer capability and dynamic stability.This may lead to sub-synchronous control interaction (SSCI) problems in series-compensated doubly-fed induction generator (DFIG)-based wind farms.To m

Cerebral aneurysms can be complex and variable in size, position, and morphology, resulting in difficult surgical exposure and secure clip placement.They have a high mortality rate when ruptured, and though endovascular techniques have 10 emerged to tackle this, surgical clip ligation remains the preferred modality for some aneurysms.Various techni