Among the main problems of subsoil use in Russia at the present time are the drop in production volumes and the reduction of geological exploration works. Insufficient financing of the regions, reduction of opportunities and interest of large mining companies to carry out exploration works make it urgent to increase efficiency of methods of state stimulation and improvement of legislation in order to strengthen the rent principle in taxation and attract small enterprises and foreign investors to the mining business.
The stability of the walls of wells drilled in a rock mass depends on the stressed state of rocks, their physical, mechanical and rheological characteristics, and the borehole drilling technology. Loss of wellbore stability causes a number of serious complications and accidents in wells. In solving the problem of stability of a wellbore drilled in an ice massif, an attempt has been made to take into account all the main factors influencing the process of wellbore deformation and to obtain a mathematical description of the latter, convenient for practical use in engineering calculations.
More than 30 years ago at international conferences it was decided to organize the International Geophysical Year (IGY). Within the framework of this decision, the scientific research of Antarctica, agreed between the IYYG participating countries, began.
В последние годы все более пристальное внимание к Антарктическому континенту проявляют многие-страны мира ...
The main indicator characterizing the drilling-melting process is the drilling speed. At thermal method of drilling speed is a generalizing indicator, depending on the power supplied to the crown-heater, axial load, geometric shape of the crown, the conditions of removal of fracture products, from the thermophysical properties of the material from which the crown is made, and the properties of the melted rock (ice) ...
The efficiency of well sinking in glacial deposits by thermo-drilling shells is largely determined by the selection and maintenance of rational modes of operation of the crown-heater and the system of melt water removal from the bottom hole during drilling ...
At the Leningrad Mining Institute, work is underway to create techniques and technology for deep drilling-melting wells in ice deposits. At the inland Antarctic Vostok station and on scientific cruises more than 4000 m of boreholes with complete coring were drilled ...
