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Date submitted1975-08-26
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Date accepted1975-10-09
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Date published1976-02-01
On the role and main directions of technical progress in geological exploration drilling
- Authors:
- Yu. M. Parijsky
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 ....
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Date submitted1975-08-20
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Date accepted1975-10-20
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Date published1976-02-01
Prospects of development of technology and technique of geological exploration drilling for solid minerals
- Authors:
- F. A. Shamshev
Developing at an unprecedented pace, our national economy puts before the geological service large and responsible tasks to identify and prepare for the transfer of mining organizations new and expansion of exploited mineral deposits ....
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Date submitted1975-08-20
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Date accepted1975-10-11
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Date published1976-02-01
Use of synthetic superhard material Elbora-B in rock-destroying drilling tools
- Authors:
- F. A. Shamshev
- G. A. Senkin
- L. K. Gorshkov
Successes in the synthesis of new superhard materials, in particular, cubic boron nitride (elboron), which has increased heat resistance compared to natural diamond and hard alloy (respectively 1.8 and 1.6 times) and chemical inertness to ferrous compounds, opened wide opportunities to expand and improve the raw material base for the manufacture of drilling rock-destroying tools ...
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Date submitted1975-08-09
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Date accepted1975-10-26
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Date published1976-02-01
To the theory of hard rock fracture during percussive drilling
- Authors:
- I. G. Shelkovnikov
In percussive drilling the rock at the bottom of the hole is destroyed by a falling bit with a percussion rod screwed on it. Potential energy stored during the rise of the projectile to a certain height is used to do useful work - breaking the rock ...
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Date submitted1975-08-16
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Date accepted1975-10-05
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Date published1976-02-01
Marine sampler MP-1 for exploration and prospecting works
Recently, in many countries, interest in the use of mineral resources of the seas and oceans is increasing. Modern technology allows the development of underwater deposits of many minerals. As a rule, these are placers located at shallow depths (up to 50-100 m).
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Date submitted1975-08-21
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Date accepted1975-10-05
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Date published1976-02-01
Heat-exchange processes during sterile ice core sampling for microbiological studies
- Authors:
- B. B. Kudryashov
- N. E. Bobin
Thermal method of drilling through snow and firn and ice deposits in hard-to-reach areas has a number of advantages over conventional mechanical drilling methods. It does not require heavy equipment and large energy costs, provides high quality and 100% core yield, which can be used for a wide range of studies: glaciological, petrographic, crystallomorphological, geochemical, etc. ....
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Date submitted1975-08-29
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Date accepted1975-10-12
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Date published1976-02-01
Justification and selection of the method of control over the frozen soil structure preservation when working out the drilling parameters of engineering-geological wells.
- Authors:
- V. I. Kovalenko
- I. S. Afanasiev
- V. I. Vasiliev
For engineering geology it is very important to take samples of soil with undisturbed structure. Especially difficult in this respect is the sampling of monoliths from frozen soils in the process of borehole sinking. In order to work out the technology of drilling wells in frozen soils, experiments were set up, in the course of which the main difficulty was the choice of the method of control over the state of structure preservation in the process of drilling ...
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Date submitted1975-08-19
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Date accepted1975-10-15
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Date published1976-02-01
Experimental stand for investigation of borehole stability during drilling in glacial cover
- Authors:
- V. K. Chistyakov
- V. M. Pashkevich
With the increase of drilling depths the borehole penetration in the glacial cover becomes sharply complicated, as the borehole continuously narrows due to ice creep under the conditions of increasing mountain pressure and temperature. Thus, during deep drilling at the Vostok station in Antarctica, ice creep became apparent from a depth of 500 m at an ice temperature of -53°C. ...
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Date submitted1975-08-07
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Date accepted1975-10-07
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Date published1976-02-01
Peculiarities of drilling and sampling during exploration of phosphorite-bearing deposits of Estonian SSR
- Authors:
- G. G. Abels
Drilling for phosphorite exploration in the ESSR is characterized by the lack of a reliable method for obtaining cores of shell sandstones composing the phosphorite-bearing strata. A typical geologic section of Estonian phosphate deposits is as follows ...
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Date submitted1975-08-08
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Date accepted1975-10-19
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Date published1976-02-01
Analytical determination of rational axial load on a cutter crown
- Authors:
- Yu. E. Budyukov
- I. E. Slyusar
If the cutter drill bit has x cutters on the working face, the axial load on the drill bit ...
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Date submitted1975-08-19
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Date accepted1975-10-16
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Date published1976-02-01
Condition of limit state of a rock rock
- Authors:
- V. A. Padukov
At explosion of powerful: charges of explosives in a massif zones of evaporation, melting, crushing and cracking are formed.The limiting state of a rock at evaporation and melting is characterized through entropy-characteristic, which does not depend on conditions of experience. Entropy of vaporization, melting are constants of proportionality in the relations between the energy of vaporization, melting of the rock and the boiling, melting temperature ...
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Date submitted1975-08-10
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Date accepted1975-10-21
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Date published1976-02-01
Investigations of heater shape influence on rock drilling-melting rate
- Authors:
- V. K. Chistyakov
- V. A. Chugunov
One of the promising directions for the development and improvement of new drilling methods is the destruction of rocks by melting or vaporizing them under conditions of intense thermal influence in the bottom-hole zone. The efficiency of drilling-melting depends little on the hardness and plasticity of rocks, as well as on external factors, and in this sense has a certain universality, which allows already now to anticipate its advantages over mechanical drilling in some specific conditions of well sinking ...
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Date submitted1975-08-22
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Date accepted1975-10-26
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Date published1976-02-01
New in the technology of drilling wells at alluvial deposits
- Authors:
- I. S. Afanasiev
- D. I. Beresneva
- V. I. Ryzhov
Drilling operations at placer deposits are difficult due to the specific structure of placers. Incohesion, friability of sandy-pebble deposits, their water content, disorderliness, presence of boulders of different sizes complicate drilling in alluvial strata ...
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Date submitted1975-08-19
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Date accepted1975-10-06
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Date published1976-02-01
Investigation of workability of experimental single-layer diamond drill bits during drilling with air blowing.
- Authors:
- L. K. Gorshkov
- Yu. E. Budyukov
Significant expansion of diamond drilling has put forward a new area of research related to the study of the nature of diamond drill bits in conditions of high contact temperatures, which are characterized by the destruction of the hardest rocks and drilling with compressed air blowing ...
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Date submitted1975-08-27
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Date accepted1975-10-11
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Date published1976-02-01
Importance of lubricating additives in diamond drilling
- Authors:
- A. M. Yakovlev
Lubricating and cooling liquids used in drilling practice can be divided into aqueous solutions of electrolytes (NaCl, CaC1g, etc.); solutions of surface-active substances - surfactants (soap and oil, sulfanol, 0P-7, etc.) and emulsion solutions of surfactants (soap and oil, sulfanol, 0P-7, etc.). ) and emulsion solutions obtained from special euilsols (B, SNAD-1, ZL-4, etc.), as well as from various oils introduced into the solution together with emulsifying additives and special additives. Emulsion solutions can be of the oil-in-water or water-in-oil type ...
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Date submitted1975-08-20
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Date accepted1975-10-09
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Date published1976-02-01
Expediency of using high-grade clay powders in drilling wells in the conditions of the North-East and Far North of the USSR.
To obtain washing solutions are used clay powders produced by various plants and local lump clays. By the cost of clay material spent on the preparation of 1 m3 of standard solution (with a conditional viscosity of 25 s), as a rule, the wrong conclusion is made about the economic efficiency of local lump clays ...
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Date submitted1975-08-18
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Date accepted1975-10-09
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Date published1976-02-01
Investigation of bottom-hole process in hard rock drilling in case of partial exposure of diamonds on the drill bit face.
- Authors:
- S. N. Tarakanov
General remarks about the downhole process under study. A modern diamond impregnated crown can work downhole in two different modes: in perfect and imperfect diamond exposure at the face of the crown. This provision applies not only to impregnated and multilayer crowns, but also to single-layer crowns operating under forced feed ...
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Date submitted1975-08-30
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Date accepted1975-10-20
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Date published1976-02-01
Nature of air inclusions in the Antarctic ice sheet (based on the results of ice core research)
- Authors:
- V. G. Portnov
When studying ice from the core of Shubina boreholes 250; 75 and 952.5 m drilled respectively at 50 km, 353 km and at Votok station, two types of air inclusions were identified. The first of them can be traced to a depth of 940 m and owe their origin to loose packing of atmospheric ice crystals in the process of accumulation. In the snow strata, cavities of this type are located between aggregates of converged grains and are made by atmospheric air ...