Mikhail Vladimirovich Dvoynikov

The invention relates to the field of drilling oil and gas wells and can be used for physical modeling of the process of eliminating brine blow-out by pumping a crosslinker into the bottomhole formation zone.

This article is devoted to the development of technology for improving the efficiency of directional well drilling by predicting and adjusting the system of static and dynamic components of the actual weight on the bit, based on the real-time data interpretation from telemetry sensors of the bottom hole assembly (BHA). Studies of the petrophysical...

In the process of drilling wells, the drill string experiences significant oscillatory and vibrational effects. These vibrations reach critical values in the lower compressed part of the drill string. Moreover, with different drilling methods, oscillatory processes are of a different nature. The article describes the mechanism of occurrence and inf...

This work is an analysis of world and domestic experience in the creation of technologies, technical means and compositions for isolation of reservoirs in the conditions of polysalt aggression, brine blowout and catastrophic absorption. The conducted analytical studies made it possible to determine the level of development of scientific knowledge i...

The article discusses the possibility of improving the design of the turbine of a hydraulic drilling machine for drilling wells in very hard rocks and at considerable depths (5000–12,000 m). The analysis of the results of studies on the technical and technological characteristics of downhole drilling motors showed that it is impossible to ensure st...

FIELD: drilling equipment. SUBSTANCE: invention relates to the field of drilling equipment for absorbing harmful vibrations of a bit and drill string. The at-bit damping device includes housing, a piston mounted with the possibility of sliding inside the housing. At the same time, a shaft is installed inside the housing, which is sealed from above...

The development of markets for low-carbon energy sources requires reconsideration of issues related to extraction and use of oil and gas. Significant reserves of hydrocarbons are concentrated in Arctic territories, e.g., 30% of the world’s undiscovered natural gas reserves and 13% of oil. Associated petroleum gas, natural gas and gas condensate cou...

The paper argues in favor of studying controlling influence of sinusoidal buckling in a drill string on cuttings and sludge removal from a directional well. It introduces an experimental test facility developed in the laboratory of Well Drilling Department, St. Petersburg Mining University, and presents a detailed procedure of the experimental stud...

The analysis of vibration accelerations effect on the well drilling efficiency researches is considered. The causes of vibrations in the bottomhole assembly and methods for measuring, interpreting and determining data from telemetry are described. The necessity of technology development for controlling the dynamic load on the bit to prevent high-en...

Physical-mechanical properties of cement slurries with the addition of wastes of the of aluminum fluoride production – silica gel – have been studied. Analysis of the study results showed that when adding silica gel in the amount of 5–15 % mass. into the cement slurry composition, there occurs an increase of the cement stone strength and its permea...

The utility model relates to removable packers and can be used in various industries, including to ensure a trouble-free drilling process in the intervals of unstable rocks and to open up intervals with abnormally low and high reservoir pressures. The downhole hydromechanical packer improves the efficiency of well completion in the uncontrolled flo...

Construction of extended-reach wells is accompanied by significant capital expenditure and risks at all stages of construction. Lots of drilling problems and accidents arise during drilling and completing of such wells. When a filter is running into a well, the most common problems are slacking off and its inability to reach the projected depth. Th...

Construction of extended-reach wells is accompanied by significant capital expenditure and risks at all stages of construction. Lots of drilling problems and accidents arise during drilling and completing of such wells. When a filter is running into a well, the most common problems are slacking off and its inability to reach the projected depth. Th...

Paper presents the analysis of the investigation results of vibrational accelerations and beating amplitudes of the downhole drilling motor, which help to define the ranges of optimum energy characteristics of the gerotor mechanism, ensuring its stable operation. Dependencies describing the operation of the «drilling bit – rotary steerable system w...

When drilling for oil and gas there are different physical and chemical processes. This is the result of the impact of drilling mud with rocks. This can be diffusion, filtration, heat transfer, capillary flow, etc. Filtration is one of the most important processes that affect drilling operations. It affects the absorption of drilling fluid, the man...

The paper substantiates the necessity of operational control and management of drilling parameters in order to prevent emergencies in the well, especially while drilling in a narrow range of absorption and fracturing pressures. The results of a multifactor computational experiment are presented: the dependence of the hydrodynamic pressure in the we...

Downhole drilling motors or mud motors are frequently used during the oil and gas well construction, especially for construction of directional and horizontal segments. However, low operation life of the down hole drilling motors and high rate of wear in their working elements may constrain their application due to technical and economical disadvan...

Destruction of welds in metalwork is caused, in most cases, by low-cyclic fatigue. Among the wide spectrum of existing fatigue gauges, the Integral Strain Gauges are widely adopted in practice of experimental researches of different machine parts and carrying systems of vehicles. The paper proposes a new method based on finite element analysis of c...

The results, based on theoretical and experimental studies of transverse vibrations of the screw downhole motor and a torsional vibration of the drill string while drilling a well in the areas of stabilization zenith angle are presented. The recommendations on the optimal parameters of their collaboration were considered.

The paper considers method of computer simulation of well multilateral junctions corresponding to TAML Level-4. The base stages of algorithm of stress-strain condition calculation of cased main and side pipes are described. Durability of junction depending on internal pressure is established in a kind of functional dependences. The influence of sid...

The article considers the methods for surface strengthening of screw downhole motors rotors. The automated line and technology for rotors surface coating application are described.

The drilling of the prospecting holes by traditional ways in weakly fixed and unfixed rock submitted by sand, boulder, pebble and moraine deposits is a complex and labour-consuming process. Such sedimentary rock are inclined to sliding and flowing, therefore there is a narrowing and collapsing of a borehole, that results in necessity of redrilling...

At the present day there is a wide usage of downhole drilling motors (DHM) from 45 to 50% as a bit drive while oil and gas wells construction. Usage of this technology allows wells drilling of various depths with different profile types by wide range of circulating fluid parameters, drilling mode parameters, and also by drillbits of different desig...

Currently there are problems associated with downhole drilling motors (DHM) instability operation, its shutoffs, low operation life of working elements (WE), and also breakdown (break out, failure of DHM elements) of drill string assembly (DS) in existing drilling technology. In particular, motor operation life can last from 90 to 235 hours dependi...

During well-drilling in conditions when bedding of solid rock is at shallow depth (from the first meters) there are significant vibrations of drilling string and connected equipment. In such situation when length of a drilling string is small and axial load on drilling bit is minimum, the effective device is necessary for compensation of axial push...

The article presents results of research of stress-strain state of multilateral well joint for TAML-4. It reviews influence of whipstock angle, which is used to build a sidetrack, and characteristics of the liner, applied at completion. Based on the results achieved, the analysis of the impact of considered factors on construction durability is con...

The paper describes the analysis of study of hydration processes occurred in dense clay rocks stipulating the stability borehole walls at using various inhibitor solutions.

The paper presents the analysis of results of the rocks stability study for some oil fields of Surgut dome. The study enabled to identify the intervals of the most problematic areas and to define the tasks the achievement of which will permit to improve the effectiveness of such areas drilling in.

The paper reviews the issues of construction of multilateral wells associated with junction of wellbores. The authors also presents technique of modeling of the stress-strain state of the joint multilateral well using software package ANSYS, which implements the finite element method, a nonlinear analysis based on elastic-plastic deformation in met...