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

Methods summarized by the term Traction Force Microscopy are widely used to quantify cellular forces in mechanobiological studies.These methods are inverse, in the sense that forces must be determined such that they comply with a measured displacement field.This study investigates how several experimental and analytical factors, originating in the

Four species of myodocope ostracod are documented from the Silurian Ludlow Series of the Aburtkan gorge on the southern slope of Dzhalpak Mountain, Uzbekistan: namely, Parabolbozoe bohemica (Barrande, 1872), great neck chisels Bolbozoe anomala Barrande, 1872, Silurocypridina calva Perrier, Vannier and Siveter, 2011 and Richteria migrans (Barrande,

Mechanical properties of textile fabric are one of the most important parameters of fabric in the selection of appropriate fabric for clothing industries.The main aim of this paper is to study the effect of the tension applied during weaving on tear, tensile, and bursting strength of plain woven cotton fabric.Five plain woven cotton fabrics were pr

With the increase in population of our country and changing geo-political landscape, the available water resources are fast depleting.We gemplers free shipping also understand that without water, there can be no life as we see in this physical world.The solution lies in judicious usage of water and realization to preserve, which ultimately leads to