Determining key features of the operation of percussion downhole drilling machines

Abstract

Dnipro University of Technology is a leading institution where an authoritative scientific school was formed to solve the fundamental issues of percussive-rotary drilling with the help of hydraulic hammers. This method makes it possible to intensify significantly the mining processes of rock mass breaking. In order to perform the specified function as fully as possible, hydraulic hammers are to work in a certain technological mode and have appropriate technical characteristics; the paper deals immediately with the analysis of those characteristics. The original designs of hydraulic hammers proposed by the authors are distinguished by a high degree of reliability of the interaction of individual parts and assemblies. Simulation of the operation of hydraulic hammers under appropriate mode-parametric support revealed a number of their significant advantages, i.e. in terms of creating effective conditions for rock mass disintegration. It has been proven convincingly that some features of the approaches to the implementation of a hydraulic well washing programme correspond to the stability of a high-quality process of the downhole work of percussion machines. As a result of the research, a composition of some rational formulations of flushing fluids, which contribute to a significant acceleration of the development of destructive processes, was clarified.

Issues of improving well construction processes and their environmental component

“…Відносно раніше розглянутих техніко-технологічних аспектів [18], заходи з охорони навколишнього природного середовища повинні, окрім іншого, включати: відомості щодо застосування для зберігання відпрацьованих промивальних рідин земляних амбарів з обов'язковою гідроізоляцією їх стінок і днища, а також підготовку площадок-складів хімічних реагентів, поверхня яких повинна бути викладені залізобетонними плитами, що далеко не завжди виконується на буровій ділянці (див. рис.…”

Technological and Environmental Basis for the Construction of Water Wells

“…A technical design for drilling wells should be drawn up solely on the basis of data on the rocks present in the geological section. To prevent possible complications in wells, it is necessary to use special formulations of mud [5]. The selection of physicochemical properties of such liquids is caused by the necessity of preventing precipitation, swelling, collapse, and absorption.…”