Method of optimal adaptive control of oil-gas wells drilling process on three mode parameters

FIELD: oil and gas industry.

SUBSTANCE: method of timely optimal control of well drilling process realizes an adaptation of determined model of fractional-power type with three control parameters to conditions at a bottom by changing its coefficients, calculation of optimal loads on bit, bit rotation rate, drilling mud consumption and well drilling at optimal modes, the achievement of which is determined by the minimum vibration frequency of the drill string. The method envisages multiple coefficients updating for power law model by results of well measurements of drilling rate, calculation of optimal parameters of control against the criterion of maximum mechanical speed, performance of drilling at calculated parameters with optimum control against minimum vibration of the drill pipe.

EFFECT: increased accuracy of optimal control of drilling mode and increased mechanical rate of well drilling due to optimisation of mathematical model control with three adjustable parameters and monitoring the achievement of the optimum minimum vibration of the drill string.

1 dwg



Same patents:

FIELD: measurement equipment.

SUBSTANCE: imitator comprises, in particular, a generator of spectral density of capacity, a noise generator, a power supply unit, a multiplier, a quantiser, a phase changer, and also a control panel, besides, a unit of spectral capacity density shape distortion, the noise generator is connected to the inlet of the summator, and on the control panel there are the following buttons corresponding to the blocks included into the imitator: a power button, handles of smooth regulation and indicators of capacities of an imitated signal in spectral ranges.

EFFECT: provision of the possibility of test signals generation with specified spectrum in accordance with spectral indices of modelled signals.

14 cl, 2 dwg

FIELD: physics, computer engineering.

SUBSTANCE: invention relates to simulation of various dynamic processes occurring in nature and in public. The system comprises a system control centre connected through a scan line to each automatic machine; an automatic machine includes a communication unit, units for processing input instructions at a current time step, general parameters of the automatic machine, general parameters of events, an application queue, an event generator, a unit for determining the value of the current time step, an event handler, a unit for generating output instructions at the current time step, logic selection elements.

EFFECT: faster simulation with a given amount of computation resources or reduction of computational resources for a given simulation time, as well as high accuracy and reliability of simulation.

5 dwg

FIELD: physics, computer engineering.

SUBSTANCE: invention relates means for automated simulation of objects. The method of classifying parts into processability groups based on geometrical parameters thereof includes: analysing the geometry of parts, creating a computer model and storing the computer model in the system as a certain mathematical description and displaying on a screen in the form of a three-dimensional object, wherein the created or obtained computer model is used to recognise geometrical components of a part: flat and curved surfaces, openings, pockets and grooves, and based on the obtained data, classifying the model into processability groups.

EFFECT: high accuracy of classifying parts into processability groups.

1 dwg

FIELD: measurement equipment.

SUBSTANCE: invention relates to information measurement equipment and is designed for recording (unlimited as to time), processing and analysis of signals of digital interfaces of armament systems of inspection objects. A general-purpose analyser of digital interfaces includes a housing with the following components installed on it: a power socket, a parameter setting module, an information display module and at least one data entry connector, as well as the following components arranged in the housing: a module of an analogue-to-digital converter, a control module, the first data processing module, the second data processing module, the first analysis module, the second analysis module, a data storage module, an internal information exchange bus and a result shaping module.

EFFECT: reducing the time required for inspection of missiles or preparation and launching equipment.

6 cl, 4 dwg

FIELD: power industry.

SUBSTANCE: invention relates to an optimisation system and method of a technological process for a thermal power plant, and namely to optimisation of load planning of the thermal power plant by using adaptive restrictions. The method and the corresponding system includes detection of an event specifying a necessity of adaptation of one or more restricted target functions used at load planning. With such a detection, a target function is analysed to determine adaptive value of restrictions for one or more restrictions for an optimum solution of the target function. The above adaptive values of restrictions are used to solve the target function, and solution of the target function with one or more adaptive values of restrictions is used to control one or more electric energy generation units of a thermal power plant.

EFFECT: possible minimisation of electric energy generation time.

9 cl, 3 dwg

FIELD: physics.

SUBSTANCE: invention relates to empirical research of temperature changes in different fields of science and can be used, for example, in weather and environmental research. The system for imitating an infrared environment for mathematical modelling includes a first computer configured to load data on an object in form of a mathematical model by creating a set of digital data and transmitting said data to a controller connected to a DMD matrix, which is configured to display on the field of said matrix in graphic form an image of the mathematical model of the object, a device for illuminating said image with infrared radiation on the field of the DMD matrix, which is connected to a projecting device which transmits an optical data stream to a thermal imaging receiving device which is connected to a second computer which processes data and generates the functioning algorithm of the object.

EFFECT: high efficiency of imitating behaviour of a system which is susceptible to temperature fluctuations over time, or a group of objects with different variable temperature characteristics.

2 dwg

FIELD: physics.

SUBSTANCE: magnetohydrodynamic simulation device includes a plasma container holding a first ionisable gas, a first electrical loop placed next to the plasma container, having a space interval, electrical contacts on the first and second sides of the interval, a first substance having at least low magnetic susceptibility or high conductivity. The first electrical loop can be composed of one or more wire loop coils. In such cases, electrical contact is established through ends of the coil wires. The magnetohydrodynamic simulation device includes an electroconductive first coil wound around the plasma container and through the first electrical loop.

EFFECT: enabling simulation of magnetohydrodynamics of plasma in a non-liquid medium.

20 cl, 4 dwg

FIELD: information technology.

SUBSTANCE: method involves forming an array of elements comprising measured parameters and observed factors which characterise the state of the system; a series of ordered system element identifiers is formed; a standard series of events detected; the standard series of events is labelled with the ordered identifiers; the labelled standard series of events is stored; modelling systems are formed; entropy potentials of events of the system are calculated; the optimum modelling system whose function, in accordance with the selected comparison criterion, best matches the function describing the system, is selected.

EFFECT: high accuracy of predicting the state of an investigated system owing to selection of the optimum modelling system.

52 cl, 3 dwg

FIELD: information technology.

SUBSTANCE: device has a housing with a digital data input/output socket, a one-time command input/output socket, an information display module socket and a parameter setting module socket, and a digital data input/output module, a one-time command input/output module, a control module, an apparatus timer module, a data storage module and an expansion board, located outside the housing: parameter setting module and information display module, and the group of inputs/outputs of the switching unit is connected to the on-board socket of the rocket under test.

EFFECT: high quality of controlling rocket equipment by checking operation in pre-launch preparation and launch modes, as well as free flight mode.

3 cl, 2 dwg

FIELD: information technologies.

SUBSTANCE: method of imitation modelling of a physical process, for instance, a flow of fluid substances in porous media by making calculations for this process in the medium under conditions of fine mesh and through repeated use of the fine mesh solution in subsequent calculations for coarse mesh. In case of fluid substances flow in near-surface formations, this method may be applied to optimise coarse meshes developed on the basis of geological models, which are produced by means of rescaling for making calculations. Using this method reduces cost of mesh optimisation during imitation modelling of the physical process, which is mathematically described with a diffusion equation.

EFFECT: increased speed of mesh optimisation during rescaling, due to repeated use of flow calculations carried out for geological models.

27 cl, 9 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: method includes the drilling rate algorithm according to which the following technological parameters of drilling process - bit rpm, bit load, flow rate of flushing liquid - are raised to the powers determined by the mathematical expressions based on the generalised parameters characterising the bit interaction with rock: time of interaction of bit cutting structure with rock; mechanical and hydraulic capacities spent at bottomhole; bottomhole differential pressure. The bit is represented by a three-channel converter of mechanical and hydraulic capacities into the deepening. The bit rpm channel and the bit load channel together perform the first stage of process of deepening - bottomhole rock destruction by the mechanical power, and the channel of the flushing liquid flow rate perform the second stage of deepening - bottomhole cleaning from the destroyed rock by hydraulic power. Both stages are performed in a single interaction, that in turn is a source of the channel feedback and of interchannel interconnections pre-determining a basis of regulation of drilling process conditions.

EFFECT: decrease of dependence of the operating mode of a bottomhole hydraulic engine from bottomhole conditions and therefore its stabilisation.

6 cl, 2 dwg

FIELD: mining.

SUBSTANCE: method is proposed to direct drilling of a drill well in a target underground bed, including stages of preparation of drilling equipment, having a layout of a bottom of a drilling string, which includes a controlled subsystem of directional drilling and a directional measurement logging instrument during drilling with the possibility of circular viewing and anticipatory viewing; determination of availability of the specified type of bed feature in a target bed; and navigation of a drilling trajectory in a target bed by drilling equipment, which includes reception of measurement signals from the directional measurement instrument, production of bed parameter indices on the basis of received measurement signals in respect to a bed feature in the target bed and control of a subsystem of directional drilling for drilling in the direction determined depending on produced indices of bed parameters.

EFFECT: expansion of functional capabilities and increased information value of tests.

23 cl, 56 dwg

FIELD: mining.

SUBSTANCE: method involves action on a mine rock and its destruction with a rotating indenter under load, determination of hardness parameters using the value of applied load and area of contact surface of the indenter. Measurements are made immediately during drilling in a differential form: mechanical drilling speed or time of duration of a certain depth interval, a value of speeds or time is adjusted by variation of load on a bit; the bit load value is measured at moment of equality of speeds or times and hardness of mine rock is determined as per an algorithm.

EFFECT: optimisation of a well drilling process.

4 cl, 1 dwg

FIELD: measurement equipment.

SUBSTANCE: invention relates to measurement equipment and may be used to measure parameters of a fluid pumped into a well. The system includes an electromagnetic flow metre, which is equipped with a controller making the base of the first measurement module, a vibration density metre equipped with a controller, making the base of the second measurement module. Modules are built into an injection line of a manifold with controlled medium, with the help of quick-split connections, the second measurement module is connected to the first measurement module, and the second module performs measurement of density, temperature and pressure. Modules are connected to a computer with the help of an information cable and a power supply unit. The computer is installed on a mounting base - all-terrain motor chassis. System supply is carried out from an AC network via a voltage stabiliser or from a board network of a vehicle.

EFFECT: increased universality, mobility, convenience of service, reliability, reduced dimensions.

3 dwg

FIELD: machine building.

SUBSTANCE: group of inventions refers to dynamic dampers of torsional vibrations and can be used at drilling of oil and gas wells. A dynamic damper of torsional vibrations comprises a case with a flywheel installed inside, the weights are fixed in the flywheel body and the flywheel is made as a torque link system. According to the first invention version, the shock absorbers enter the mass-joint on one end, and the weights made as cylindrical segment-plates by means of a welded bracket and lugs on the other end. According to the second version, a rod with hold-down screws and a lock ring is installed inside the case on one side, and a rod and a spring for its backup are installed on the other side. The shock absorbers enter the mass-joint on one end, and the weights by means of a crosspiece on the other end, the weights are made as cylindrical segment-plates fitted by recesses of different depths. Both versions imply that elastic elements are inserted between the weights for the clearance Δ, together with the weights being distanced from the washer with flyweight in the form of a hollow cylinder.

EFFECT: improved damping characteristics, reduced negative impact of torsional vibrations on a drilling unit in the wide range of its rotation frequency change, increased service life and reliability, reduced failures of the equipment.

3 cl, 5 dwg

FIELD: mining.

SUBSTANCE: as per one version of implementation, the method involves well shaft drilling by a drilling bit, determination of an axial load on the bit during drilling of the well shaft, determination of pressure drop in the working surface area of the drilling bit during drilling of the well shaft and determination of the corrected axial load on the bit as per a certain axial load on the bit and a certain pressure drop.

EFFECT: creation of improved drilling bit and method allowing to correct changes in measurement results of an axial load and torque, which occur due to pressure drop in the drilling bit.

20 cl, 6 dwg

FIELD: physics, computer engineering.

SUBSTANCE: invention relates to a method, a device and a computer-readable data medium used when constructing a geologic model of an oil or other deposit. The invention enables, for markers selected as the initial solution, to calculate marker depths at each well which provide the best overall correlation. The method includes determining, for each marker which is part of a set, a composite function which is the sum of correlation coefficients of a system of well logging techniques for pairs of wells located no more than a given distance from each other. Partial derivatives are calculated for said composite function and the obtained vector is smoothed and used to find a greater value of the composite function at a certain section along said vector. If a greater value is not found, the last position of the marker is considered the solution, otherwise the solution point is smoothed and the process is repeated. The marker depths are sorted at each algorithm iteration.

EFFECT: improved accuracy of calculation of parameters used to construct a geological model of the location of oil or other deposits.

3 cl, 9 dwg

FIELD: physics, computer engineering.

SUBSTANCE: invention relates to a method, a device and a computer-readable data medium used for building a geological model of an oil or other mineral deposit, particularly for determining correlation coefficients for a set of well-logging curves and finding the position of marker depths, for which the correlation coefficient value is maximum. The method enables, for a marker already having marks at a certain so-called reference group of wells, to calculate said marks for a well from another group. For each well W, on which the marker depth value is being searched for, wells of a reference group lying at a given distance from well W are selected, and from among them a well is selected with the highest correlation coefficient, wherein the point at which said maximum is reached is denoted as the desired mark of the marker. Verification tests are used to search for wells in which the correlation function is less than the maximum correlation coefficient, and the correlation quality coefficient is greater than the maximum correlation coefficient. The found well is added to the reference group of wells.

EFFECT: improved accuracy of calculation of parameters used to build a geological model of the location of oil or other deposits.

8 cl, 9 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: proposed method comprises well drilling, core recovery in drilling and core analysis for content of impurities. Note that spectral analysis is made to detect water-oil-insoluble salts of heavy metals and to fix their occurrence depth. Availability of said compounds allows making the conclusion on the location of super reservoirs in deposit. Quantitative content of said impurities in core rock allows making the conclusion on accurate location of interlayers. Said accurate location is used to take measures for prevention of well collapse by reducing the mechanical drilling rate.

EFFECT: simplified core analysis, higher validity, decreased accident rate.

1 dwg, 1 ex

FIELD: oil and gas industry.

SUBSTANCE: device contains at least a temperature sensor, level gages and a mud flowmeter and a density gage that includes a gamma radiation source and a detector block as well as an electronic signal processing unit and a computer. The temperature sensor, level gages and the mud flowmeter and the gamma radiation source are mounted together in a space-saving way on the common load-carrying platform made as a quick-disconnecting hatch cover in the upper part of the mud ditch. Inside of the latter there is a suspended acoustically transparent container rigidly coupled to the platform and divided into two cavities; in one cavity there is the temperature sensor while in the other one there is a velocity metre made as an electroacoustic transducer interacting through the contact surface with the container wall and faced by a transducing surface towards the mud ditch surface. The gamma-radiation source is placed on the outer lower surface of the container.

EFFECT: high accuracy of the monitored parameters, simplicity, small size and mobility of the design, handling safety, reduction of time period for assembly and disassembly.

2 cl, 1 dwg

FIELD: mining industry.

SUBSTANCE: system includes mathematical model of drilling process in form of combined influence of conditions at pit-face and of drilling column operation. Model of drilling process is constantly renewed by results of well measurements performed during drilling operation. On basis of renewed drilling process model a set of optimal drilling parameters is determined and sent to system for controlling surface equipment. Also, system allows surface equipment control system to automatically adjust current control sets for surface equipment on basis of renewed optimal drilling parameters. Different control scenarios are generated and executed for transferring data to surface equipment control system on basis of current drilling mode.

EFFECT: optimized operation.

2 cl, 7 dwg