Control of borehole drilling operations

FIELD: mining engineering.

SUBSTANCE: method includes determining measurement values of a bottomhole assembly sensor, determining a model of the bottomhole assembly dynamics based on the measurement values of the bottomhole assembly sensor, determining a weight factor which corresponds to the final drilling point, determining a target function including the final drilling point weighted by the weight factor and one or more restrictions, wherein the target function comprises future states of the bottomhole assembly system, and determining said target function includes determining calculated future deviation from the target borehole path, determining an input control action on the bottomhole assembly that meets the target function and one or more restrictions, and using an input control action to the bottomhole assembly.

EFFECT: increased efficiency of the drill string bottom hole assembly control.

24 cl, 10 dwg



Same patents:

FIELD: measurement equipment.

SUBSTANCE: invention relates to design of underwater pipeline systems exposed to stress cracking caused by hydrogen. A system of inspection of the fact that underwater systems of pipelines are suitable to assess stress cracking caused by hydrogen comprises the following: a component of a transform function generator, creating the specified function; a component of a transform function mechanism, which performs the specified function; a component of transform function storage; analysis of specified assessment of local stress for the first previously condition of suitability, and if the specified assessment of local stress is not suitable, then detection and performance of a 3D model for the specified element and analysis of output data of the specified 3D submodel for compliance with the second previously specified condition of suitability.

EFFECT: calculation of local stress in pipeline elements by means of postprocessing of forces and torques of a pipe model, which represents the piping system.

14 cl, 9 dwg

FIELD: physics; control.

SUBSTANCE: invention relates to computer-aided design of a process of producing metal products, which consists of a sequence of processes: obtaining a workpiece by casting, pressure shaping and heat treatment of the cast workpiece; at the beginning, testing standard samples of the material of the metal product to determine heat conductivity, heat capacity, density and deformation resistance; files of a database obtained from results of computer-aided design of the process of obtaining a cast workpiece are displayed on a monitor screen, while simultaneously displaying on the screen requirements for data imported into the computing environment for finite element analysis for computer-aided design of pressure shaping and heat treatment processes; from the database files, selecting data matching the requirements and copying said files; creating an empty file; inserting the copied data into the empty file; saving the obtained file; opening the saved file in the environment for computer-aided design of pressure shaping and heat treatment processes and, using said data, beginning computer-aided design of pressure shaping and heat treatment processes for the cast workpiece.

EFFECT: high flexibility of combining computer media for finite element analysis during computer-aided design of process cycles of producing a metal product.

5 dwg

FIELD: physics, computer engineering.

SUBSTANCE: invention relates to designing of complex mechanical devices. this process comprises CAD fail generation with graphical representation of the element and data file including the element 3D positioning matrix along with one indicator to this CAD file. It includes geometrical representation of the element of said set. Besides, it includes computation of 3D positioning vector for said element and creation of parts list data structure. Here, said structure comprises set identifier, element identifier, at least one link between element identifier and CAD file containing the element geometrical representation. Besides, it includes at least one line between set identifier and data file including 3D positioning matrix for at least one said set element and positioning vector.

EFFECT: synchronisation of CAD file formats.

9 cl, 10 dwg

FIELD: physics, computer engineering.

SUBSTANCE: invention relates to computation of approximate static well pressure for one or more arbitrary shaped wells in homogeneous and heterogeneous reservoirs. Determination of approximate static well pressure is based on estimating the drainage volume of one or more wells. The drainage volume, for example, can be estimated from the one or more computed fluid flow flux vectors and the approximate static well pressure in the well can be subsequently calculated by taking the pore volume average of the dynamic grid block pressure within the drainage volume of the one or more wells. The one or more fluid flow flux vectors can be calculated at each iteration in a numerical reservoir simulator as a part of standard simulator computations.

EFFECT: more accurate approximation of the true static well pressure at every time step of the simulator, which improves computation of approximate static pressure for arbitrarily shaped wells in homogeneous and heterogeneous reservoirs and avoids additional computations of the effective drainage volume by calculating fluid flow flux vectors at each iteration in a numerical reservoir simulator.

50 cl, 19 dwg

FIELD: radio engineering, communication.

SUBSTANCE: method includes specifying source data, creating a probabilistic network graph in each statistical experiment, simulating movement of subscribers, generating an initial topology and structure of heterogeneous networks, wherein the source data for simulation are generated based on the topological structure of a real network and then simulating the arrangement of heterogeneities in the given fragment and the arrangement of elements in each heterogeneity.

EFFECT: high reliability of simulating communication networks, enabling simulation of communication network fragments, invariantly available, based on physical and geographical conditions of the location and topological heterogeneities arising during network development.

6 dwg

FIELD: physics, computer technology.

SUBSTANCE: invention relates to the system and the method of design of building utilities. The system comprises a processor designed with a possibility of execution of the software program, user interface connected to the processor and designed with a possibility of reception of multiple data sets comprising the first data set containing the locations of multiple component devices of building utilities and the second data set containing at least one working parameter connected with at least one of multiple component devices, meanwhile the processor by means of execution of the software program uses multiple data sets for generation of multiple design solutions, and each of multiple design solutions contains a configuration of connections between multiple component devices, and also determines the costs for building connected with each of multiple design solutions and determines the optimised design solution from multiple design solutions on the basis of operational costs.

EFFECT: improvement of efficiency and accuracy of design of building utilities.

20 cl, 2 dwg

FIELD: physics, control.

SUBSTANCE: method of compressing information for automated design of ship movement control systems, consisting of a measured information unit, local area networks, controllers, actuating means, a dynamic model of ship movement, an information presentation and result recording unit, a control and mode optimisation unit, an information compression unit, comprising registers for the obtained value and time of arrival thereof, a first comparator unit, a register for recording the time of transmission, logic OR and AND units, a timer, a second comparator unit, a transmitted value register and a network packet former. The method includes time delay of transmission of measured information to a local area network by a given value C1.

EFFECT: compressing information by cutting and screening out intermediate values.

7 dwg

FIELD: measuring instrumentation.

SUBSTANCE: invention refers to modelling and can be applied for behaviour modelling for aviation structures and products with uncertain input parameters. Method involves behaviour modelling for aviation structures and products with uncertain input parameters at two levels: at macro level by method of end element modelling, and at micro level by quantum and molecular mechanics methods; first, microscopic samples of the model similar geometrically to standard samples used in mechanical tests are examined and tested by molecular dynamics methods, and obtained mechanical parameters of microscopic samples are used as missing macroscopic parameters in material models for end element modelling; transition from micro to macro level and back is made with the use of scale invariance of mechanical parameters and laws.

EFFECT: increased accuracy of mechanical and operation property tests of developed and reconstructed units and components.

4 dwg

FIELD: physics, computer engineering.

SUBSTANCE: invention relates to digital computer engineering and is intended for planning the topology of logic integrated circuits when designing computer systems. The apparatus includes a device for searching for a lower estimate of arrangement in matrix systems with two-way information transmission and a device for planning the topology of logic integrated circuits, comprising a microprocessor, random-access memory, a memory direct access controller, a parallel port, a serial port, a PLD topology planning unit, an adjacency matrix and a circuit matrix of a unit for finding the minimum lower estimate, a search permutation unit, a unit for finding the minimum lower estimate, a unit for searching for the initial value of communication delay.

EFFECT: planning the topology of programmable logic devices (PLD) based on the criterion of minimising the intensity of interaction of processes and data.

2 cl, 18 dwg

FIELD: electricity.

SUBSTANCE: device comprises a clock-pulse oscillator (CPO) 1, an enable trigger 2, a trigger of result availability 3, a group of counters 41, 42, …, 4m, a matrix (m×n) of triggers 511, …, 5mn, a matrix (m×n) of groups of the first AND elements 611, …, 6mn, a group of the first summators 71, 72, …, 7n, a group of the first registers 81, 82, …, 8n, a group of the first comparison circuits 91, 92, …, 9n, the second AND element 10, the second summator 11, the second comparison circuit 12, the group of second registers 131, 132, …, 13m, the third register 14, a start inlet 15, an inlet of initial setting of a device 16, a group of the first outlets of a device 171, 172, …, 17m, the second outlet of a device 18, the third outlet of a device 19, a group of the fourth registers 201, 202, …, 20m, a group of the fifth registers 211, 212, …, 21m, a group of the third comparison circuits 221, 222, …, 22m.

EFFECT: increased reliability of a device and increased efficiency of a device.

1 dwg

FIELD: oil and gas industry.

SUBSTANCE: control system of mutual orientation process of shafts during cluster drilling of oil and gas wells is suggested; the system comprises the core body including power supply source, electromagnetic oscillator made as dipole installed over bit of the drilling well (DW) thus ensuring electromagnetic coupling between DW string and at least one production string (PS) of drilled holes (DH) and the surface part including converter of the parameter being function of electrical performance for a section of the circuit formed by DW string and rock in the vicinity of dipole area to voltage and m converters of the parameter being function of electrical performance for a section of the circuit formed by PS DH and a section of the rock lying between DW bit and PS DH to voltage, where m is a number of PS. At that the above converters are made as toroidal inductance coils placed axially at the wellhead (DW), and m of the same coils is placed at the wellhead, where m≥1; value of current induced in pipe strings is selected as electrical performance for rock sections and is defined as per the mathematical expression specified above.

EFFECT: improved accuracy for determination of a drilling well position in regard to unlimited quantity of production strings of wells drilled earlier with number identification for these wells.

2 cl, 3 dwg

FIELD: oil and gas industry.

SUBSTANCE: invention is related to alignment devices, in particular, to devices to be used for alignment of drilling rigs to ensure correct direction of drilling. The laser alignment device intended for use with a drilling rig has an extended drilling rod and a drill head unit comprising at least a pair of laser radiating devices mounted independently at the head unit, at that each laser device can be moved only in one plane and is oriented in essence in opposite directions in regard to each other to set the alignment plane, fasteners to fix the drill head unit to the drill rig and a unit with adjustable length to adjust distance between the head unit and drilling rod.

EFFECT: laser adjustment device is made for alignment of the drilling rod direction in regard to survey marks using the scan plane.

25 cl, 21 dwg

FIELD: physics.

SUBSTANCE: method for making acoustic logging measurements includes grouping received acoustic waveforms into one of a plurality of groups, each said representative group corresponding to certain measured borehole condition parameters (e.g., a range of measured deviation values and/or a range of measured azimuth angles). The acoustic waveforms stored in at least one of the groups are stacked so as to obtain an averaged waveform. The averaged waveform may be further processed, for example, via a semblance algorithm to obtain at least one acoustic wave slowness.

EFFECT: high accuracy of logging data.

17 cl, 4 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to in-well calibration of tools. In-well transducer calibration device comprises case and rotary mechanism or gimbal mount arranged therein and including at least one transducer. Note here that said rotary mechanism allows the transducer turn in three perpendicular axes, transducer sensitivity axis displacing in 3D orbit. Besides, this invention covers the transducer calibration process consisting in application of measurements made in said 3D orbit for transducer calibration and definition of the other parameters of said transducer or calibrated tool.

EFFECT: elimination of constraints at calibration of downhole instruments of temperature walk and other faults of the transducer.

33 cl, 30 dwg

FIELD: oil and gas industry.

SUBSTANCE: suggested invention relates to the filed of directional well drilling, in particular, to methods of control for directional drilling. The invention suggests the method for drilling trajectory control for the second well passing in direct vicinity to the first well, which includes passing of the first electrode connected to the first conducting wire through the casing string; placement of the return grounded electrode in the surface soil; generation of time-dependent electric current in the first conducting wire and the first electrode and the second conducting wire passing towards the return grounded electrode; formation of an electromagnetic field around the casing string of the first well induced by passing of time-dependent electric current in the first conducting wire; drilling of the second well against the drilling trajectory parallel to the first well; measurement of the electromagnetic field formed around the casing string of the first well from the drilling rig in the second well; and control of the second well trajectory with use of the measured electromagnetic field. At that the first electrode passes to an uncased borehole section, beyond the farthest end of the casing string so that the first conducting wire passes along the whole length of the casing string in the first well. Besides, distance between the first electrode and the casing string end should be sufficient for prevention of current passing from the first electrode upwards, through the casing string of the first well towards the return grounded electrode.

EFFECT: improving accuracy of the drilling trajectory control and levelling of one well in regard to another well.

10 cl, 7 dwg

FIELD: mining.

SUBSTANCE: method for zenith angle and drift direction determination by gyroscopic inclinometer is proposed. It consists in continuous measuring of stress proportional to angle of platform stabilisation error upon initial azimuthal orientation of gyroscopic inclinometer and upon movement of well-logging tool in well. Obtained stress is used for determination of angular rate by angular rate sensor sensitivity axis without errors from angle of stabilisation error. The angular rate is used for estimation of azimuth angle of accelerometer sensitivity axes at the moment of completion of initial azimuthal orientation. For implementation of proposed method developed is a device in which additional output connected to additional channel of data processing introduced in digital processing unit is introduced in electric circuit of platform stabilisation channel amplifier.

EFFECT: improving accuracy of path of extended inclined and horizontal wells determination.

3 cl, 1 dwg

FIELD: mining.

SUBSTANCE: invention proposes a method for determining well deviation angles, which involves measurement of projections of magnetic field intensity with ferroprobes, measurement of projections of free fall acceleration with accelerometers, measurement of projections of the Earth angular speed with gyroscopes on an inclinometer axis, conversion of primary signals and determination of spatial orientation of a well shaft. Error of gyroscopic sensors is evaluated by means of information received from a satellite navigation system, and drift value of gyroscopic sensors is corrected considering information received from ferroprobes. In case magnetic abnormalities are absent, orientation angles are calculated as per signals received from ferroprobes and accelerometers. And at operation in media with abnormal magnetic properties or cased with steel pipes, well orientation parameters are calculated as signals received from gyroscopes and accelerometers.

EFFECT: enlarging functional capabilities of the method owing to making measurements in cased and non-cased wells; improving accuracy of the device that implements it due to joint use of ferroprobes and gyroscopes, and compensation of drift of the latter.

2 dwg

FIELD: oil and gas industry.

SUBSTANCE: method includes stress inducing in formation around well shaft in order to generate in it some special feature related to induced stress. Measurements presenting well shaft geometry are performed using assembly of drilling string bottom rotated in well shaft, which geometry presents induced stresses in formation. Creation of well shaft image based on its geometry measurements. Evaluation of azimuth variation of induced voltage in formation by well depth. Change of parameter of drilling mode for assembly of drilling string bottom using evaluation of azimuth variation of induced voltage in formation by well depth.

EFFECT: using data obtained in real-time mode, checking stress model for certain region, so that the path may be corrected constantly for achievement of optimum ratio with measured characteristics of stress for this region.

21 cl, 12 dwg

FIELD: oil and gas industry.

SUBSTANCE: device is composed of the following components: main and directional units of gamma-ray logging sensors installed in MWD casing. The directional unit of gamma-ray logging sensors is placed into a lead case with a window to register directional gamma-ray emission which is interrelated physically with a deflector position. The units of gamma-ray logging sensors are placed into a measuring gamma-module with a wire communication channel and MWD unit and are equipped with an electronic circuit for MWD signals matching with pulses of gamma-ray logging sensors.

EFFECT: improving accuracy of gamma quantum registration, simplifying the design and optimisation of control efficiency during horizontal and directional sidetracking.

2 dwg

FIELD: oil and gas industry.

SUBSTANCE: bottomhole drilling fluid flow rate sensor includes a housing, a diaphragm and connecting tubes. At that, the device located in lower part of a drill pipe immediately above a bit and rigidly fixed on the pipe walls has a mechanical oscillating system made in the form of a hollow counterweight with a membrane, which is torsionally suspended on two capillaries, and with a constant magnet fixed on it, a system of actuation and pickup of oscillations, which interacts with a constant magnet field, and two separating vessels interconnected with the capillaries. Fluorocarbon liquid "Б"-1 serves as separating liquid for space under the membrane of the counterweight, and dibutyl phthalate - for space above the membrane.

EFFECT: improving reliability of measurement of the drilling fluid flow rate immediately during well drilling process.

1 dwg

FIELD: oil and gas industry.

SUBSTANCE: group of inventions is related to the area of formation of subsurface well bores. System for formation of subsurface well bore contains a rack-and-gear drive comprising a drive system with clamp arrangement capable of the drill stem control; automatic position control system comprising at least one measurement sensor connected to the rack-and-gear drive, at that automatic position control system is designed to measure and track increasing angular location of at least one pipe and control position of at least the above pipe using rack-and-gear drive.

EFFECT: provision of the well bore formation without interruption of the drilling process.

18 cl, 8 dwg