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High-temperature drilling in deep HPHT and geothermal wells (>180–220 °C) causes thermal degradation of drilling fluids, which compromises hydraulic performance and accelerates wear of PDC and diamond-impregnated bits. This study evaluates three fluid systems – high-temperature oil-based mud (HT-OBM), thermally stabilized water-based mud (HT-WBM), and nanoparticle-enhanced synthetic-based mud (nano-SBM) – subjected to static aging in HPHT cells at 150–240 °C for 16–40 hours, followed by measurements of...

High-temperature drilling in deep HPHT and geothermal wells (>180–220 °C) causes thermal degradation of drilling fluids, which compromises hydraulic performance and accelerates wear of PDC and diamond-impregnated bits. This study evaluates three fluid systems – high-temperature oil-based mud (HT-OBM), thermally stabilized water-based mud (HT-WBM), and nanoparticle-enhanced synthetic-based mud (nano-SBM) – subjected to static aging in HPHT cells at 150–240 °C for 16–40 hours, followed by measurements of...

The development of efficient drilling tools tailored to the unique geological conditions of Kazakhstan's drilling sites is paramount for optimizing well construction operations. This study focuses on the design, fabrication, and evaluation of a combined spud bit specifically engineered for drilling technological wells in Kazakhstan. The combined spud bit integrates both polycrystalline diamond compact (PDC) and carbide cutters within a single robust structure to enhance drilling performance across a diverse range ...

The optimization of technological processes is vital for advancing scientific and technical progress in exploration activities, particularly in drilling operations. The integration of operating microprocessor equipment and automated management systems has opened up new opportunities for theoretical research in optimization processes and drillings. Control systems for drilling exploration wells on solid minerals enable real-time operation and data collection, processing, and diagnosis of equipment functionality. Op...

The work is devoted to the study of the effect of powdered WC monocarbide of different grain sizes, introduced into the composition of the binder of diamond grains of the composition 94 WC + 6Co + Cu in the manufacture of a diamond-bearing matrix of BS-NQ drill bits with a diameter of 75.6 mm, designed by ISM (Ukraine). The effectiveness of the mentioned crowns was evaluated according to the proposed indicator F= ( - mechanical drilling speed; h - the value of the deepening per single experience, - - linear wear o...

The article justifies the need for technological solutions in the use of polymer-composite materials in order to limit the impact of dynamic frictional forces in oil drilling. The relationship between macrostructural surfaces was investigated, in particular increasing the effectiveness of the axial load on the drill bit during drilling directional and horizontal wells. It is established that the polymer coating of drill string elements (BC) based on fluoroplastic brand F-4, with a small thickness of 2 ? 3 mm and t...

A comprehensive study of composites using traditional methods of testing mechanical properties in combination with methods of digital optical and scanning atomic force microscopy made it possible to establish stable correlations between the content of chromium diboride CrB2 additive with an average grain size WC, microstructure parameters, hardness, fracture toughness, ultimate strength at bending and compression. The optimal ratios of the components of the WC–Co-CrB2 system have been established, at which a finel...

Objective of the research is to develop annular-type drilling tools, which application increases mechanical velocity of drilling and overall productivity of drilling operations. Methodology is represented by the following: analysis and generalization of the scientific and technical achievements in mining industry; mathematical and physical modeling; and numerical methods of solution. Findings – a drill bit with following features has been developed: first, during the initial well sinking, the bit operates with one...

The drilling muds parameters are playing a major role in drilling technology and particularly in oil and gas drilling technology. At present those parameters are measured manually at long and irregular time intervals. In Satpajev university a general method of the existing manual measurements automatization has been worked. A number of patents on appliances for automatic continuous measuring the drilling mud funnel viscosity, density, jell stress and other parameters was obtained. Engineering development on creati...

The power and energy parameters of paddle drills used for drilling geotechnological wells in the extraction of uranium raw materials are considered. The distributions of the axial load, rotational force, and power for all rock-cutting elements of drills are obtained. A comparison of the cost of power for the destruction of the bottom of the well using a well-known and patented picobur equipped with a ring pilot showed that picobur of a new design during drilling reduces energy consumption by 14-17% due to a more r...

In the formation of the well under the influence of an axial load and speed core drilling shell is curved, with its lower bottomhole part consists of elements of different stiffness: a set of core and drill pipe. The researches allowed to formulate a number of conclusions. To determine the length of the half-wave in this part of the technological tools used energy method, according to which the whole work of external forces on the length of said potential energy goes into twisted drill. The half-wave length decrea...

A mechanism of core blocking that is drilled out during the coring from deep wells in the direct and indirect flushing with drilling mud is examined. Using methods of technical mechanics and hydromechanics, a formula for flow rate excluding a core blocking is obtained during the backwashing. The value of necessary flow rate depends on not only a direction and intensity of fracturing of rocks, geometrical and density parameters of core pieces, but also on structural strength of drilling mud. A mechanism of core sel...