Summary on the application of the gravitational method to eliminate intercasing pressure

This article provides an analysis and summary of the experience of using the gravity method for eliminating annular pressure in the wells of the subsidiaries and dependent companies of JSC NC KazMunayGas. The analysis used the actual data obtained immediately after the elimination of annular pressure in wells using a compositional composition on a hydrocarbon basis by gravity replacement of annular fluid.

Justification of the Gravitational Seed Cleaning System Parameters

The author researched the gravitational method of separating a grain heap, in which cleaning from large and small impurities was carried out without energy consumption, with the gravity material fl ow in vertical cleaning columns along fi xed zigzag separating combs.(Research purpose) To study the gravity column operation for cleaning selection seeds and substantiate its design parameters.(Materials and methods) A prototype gravity column was developed. The author experimentally determined: the combs teeth diameter; column throughput; the possibility of a more complete separation of the seed fraction from the basic material; completeness of large impurities separation. He compared the work of the gravity column and the fl at rocking sieve. He assessed the combs jamming by the cleaned culture seeds.(Results and discussion) The author noted that on wheat cleaning at a productivity of 45.6 kilogram per hour, the yield of the "waste" fraction was 0.5 percent, a loss of 0.07 percent, and at a productivity of 227.8 kilogram per hour – 0.98 and 0.35 percent, which corresponded to the initial requirements for the main technological operations for post-harvest processing of selection seeds.(Conclusions) It was found that a gravity column for separating selection wheat seeds small impurities separated particles with high effi ciency if they diff ered from each other in thickness of at least 0.3 millimeter with a gap between the comb bars of 2.0 millimeter and a bar cross-section diameter of 0.9 millimeter. It was determined that high productivity – up to 150 kilogram per hour – was possible with a column cross-section with sides of 60 and 70 millimeter. The author revealed practically the same quality of material separation when separating small impurities using both a sieve and a gravity column.

OPTIMIZATION OF LOCATION OF TRANSPORT AND LOGISTICS CENTERS AT THE EXAMPLE OF THE REPUBLIC OF KAZAKHSTAN

Transport links largely determine the potential of a country located within the Asian region to interact with market entities beyond region’s borders. Meanwhile, transportation logistics of individual regions, territories, and countries is a complex integrated problem, whose solution is based on the approaches to fundamentals of organisation of the operation of transport infrastructure.One of the key tasks in organizing the work of the transport system of the Republic of Kazakhstan is to determine the location of the elements of its transport and logistics infrastructure. At present, theoretical and methodological approaches to solving this problem can be divided into multicriteria analysis and coordinate (gravitational method) approach.The objective of this article is to analyze the possibility of using gravitational and multicriteria methods to find the optimal location for transport and logistics centers using the example of the Republic of Kazakhstan. Based on that the research was intended as an attempt to find optimal location of transport and logistics centers in the Republic of Kazakhstan. It was clearly shown that the use of the gravitational method has constraints if not supplemented by the use of the multicriteria analysis method when solving the problem of choosing the optimal location of the transport and logistics infrastructure at the example of the Republic of Kazakhstan.