The complexity of the conditions of diamond drilling of exploration wells is one of the significant factors affecting its efficiency.

The complex of works on causing the inflow of liquid from the productive zone (well development) is the final operation in the technological cycle of well construction for liquid and gaseous minerals, the quality of execution of which largely determines the possibility of obtaining commercial inflow of liquid and the efficiency of drilling operations.

The fruitful activity of Academician D. V. Nalivkin is inextricably linked with such a milestone event in the history of the Soviet geological service as the creation of the geological map of the USSR. Although this did not exhaust the tasks of geological mapping, still the problem of erasing "blank spots" began to lose its acuteness. In the foreground came the tasks of improving the efficiency of geological exploration, in the solution of which the geological map has acquired the role of a kind of compass, helping to determine the direction of prospecting and exploration work.

When studying the motion of liquids and gases in a variety of technological processes of drilling wells widely used concepts of hydroaeromechanics, expressing the laws of conservation of mass, momentum and energy.

In the process of drilling and equipping hydrogeologic wells, the natural state and properties of rocks in the downhole zone are changed to a greater or lesser extent.

In the general complex of exploration works for the development of geothermal resources drilling of wells is the most complex, labor-intensive and expensive type of work ...

Существующие методы эксплуатации геотермальных месторождений основа­ны на применении буровых скважин для вскрытия термоводоносных зон и из­влечения природных теплоносителей в условиях естественного фонтанирования ...

Economic indicators of geothermal system significantly depend on the wellhead potential of coolant brought to the surface by wells. In this regard, during the exploration and operation of geothermal systems, the assessment of heat losses in production wells is of particular relevance ...

Modern geological exploration service is characterized by a developed technical base, in which an important role is played by such complex works as drilling of wells and sinking of mine workings ....

Modern scientific and technological progress requires more and more complete development and rational use of natural resources. Along with the use of other types of energy and fuel, geothermal resources are an important energy reserve. With the development of science and technology, the possibilities of extracting the deep heat of the Earth are expanding. ...

Modern scientific and technological progress requires more and more complete utilization of natural resources. Along with the use of other types of energy and fuel, geothermal resources, i.e. the heat content of the Earth's crust, represent an important energy reserve. Necessary prerequisites for the wide practical development of these resources creates the development of technology and technology of drilling wells, contributing to the study of ever deeper horizons of the Earth's crust and the accumulation of factual material on geothermy.

The main factors determining the peculiarities of drilling technology for high-temperature water are the increased values of reservoir pressure, gas saturation and water temperature. Depending on the magnitude of the geothermal gradient and the depth of drilling, the temperature in the well can vary widely and reach 200°C and more.

The intensity of rock destruction in rotary-impact drilling depends, as is known, on a number of factors, the most important of which are the energy and frequency of impacts, the magnitude of axial load and the speed of rotation of the tool. The joint action of these factors causes a very complex nature of the drilling process, which makes the study of its regularities very difficult. Insufficient study of the mechanism of rock destruction and the process of interaction of the tool with the rock during rotary impact drilling restrains the development of this effective method of drilling.

“The area of the Deputatskoye field, where drilling was carried out, is composed of lithologically monotonous sediment strata dislocated in large gentle folds of sublatitudinal and northeastern strike. In terms of physical and mechanical properties that determine the choice of diamond tools, the rocks composing the deposit can be divided into three main groups: 1) heavily crushed, often crushed medium- and fine-grained sandstones and sandy-clay shales cemented with calcareous material and ice, VІІІІ-ІХ categories of drillability; 2) sandy-clay shales of VІІІІ category of drillability; 3) dense occluded, in some places keratinized fine-grained low-abrasive sandstones of X-XІ categories of drillability.

Due to the special sensitivity of diamonds to the temperature factor, compliance with the normal thermal regime of diamond bits during drilling is one of the main conditions for their efficient operation. The normal thermal regime should be considered to be such a thermal regime at which the diamond heating temperature does not reach the value causing their oxidation, graphitization or deformation due to temperature stresses.

In many studies of rock fracture in rotary drilling, the following view of the sequence of phenomena occurring during the interaction of the cutter with the rock has been established. Under the action of the axial force C, the cutter penetrates the rock to a certain depth ...

The percussive-rotary method of drilling has found in recent years increasingly widespread use both in the USSR and abroad. When sinking explosive wells pneumatic percussion drilling units confidently displace low-productive percussion-rotary machines. Shock-rotating machines for borehole drilling in underground workings have appeared. A number of research organizations of our country are working on the creation of hydraulic percussion machines for sinking exploration and production wells. However, the theoretical basis of percussive-rotary drilling is very poorly studied, despite more than half a century of research history of this undoubtedly progressive method of rock destruction. If now it is possible to point out certain successes in the field of design and study of different kinds of percussive-rotary machines, at the same time it is impossible not to note the almost complete absence of works devoted to the study of the physical essence of the process of interaction of the tool with the rock. The progress in this field has now become an absolutely necessary condition for further improvement of the theory and practice of percussive-rotary drilling.