Methods and systems for adjusting technological process of well logging

FIELD: oil and gas industry.

SUBSTANCE: method comprises measuring formation characteristics using a logging device located in the wellbore, collecting measurement data corresponding to the measured formation characteristics, generating a visual representation of the formation using the collected measurement data, setting the control parameter of the well logging of the logging device based on at least some measurement data and the mechanism of adaptive learning within the logging device, and selecting updates for the adaptive learning mechanism at least partially on the basis of the visual representation.

EFFECT: increasing the efficiency of managing the working process of the well logging.

28 cl, 12 dwg



Same patents:

FIELD: electricity.

SUBSTANCE: invention relates to conducting connections of drilling pipes for signal transmission between a bottomhole and a surface. The electric connector is offered which contains the first and second parts (10, 20) of the connector which contain the first and second contact elements (11, 21) and the first and second holders (1b, 3a) respectively which hold the first and second parts of the connector, and can be assembled to each other by means of screw or bayonet fastening device. The first part of the connector contains the elastic bearing frame (13), the proximal end (13a) made integral with the first holder, and the distal end (13b) holding the first contact element. The second part of the connector contains a bearing ring (23) which provides engaging with the sliding image of the first contact element when fastening between the first and the second holders. On a limited circular arch of the bearing ring the second contact element is placed, and the ledge (30) is provisioned for stopping which is suitable to stop the first contact element at the second contact element to provide connection with the connector parts.

EFFECT: technical result is improvement of accuracy and reliability of connection at the expense of avoidance of discrepancy and axial gaps between electric contacts during assembly.

18 cl, 12 dwg

FIELD: oil and gas industry.

SUBSTANCE: invention claims method of bottomhole communication with the surface via cable-free telemetric system during well drilling, involving measurement channel data coding by noise-type signal and further transmission of measurement channel data in packets containing timing code, packet code and channel data. Measurement channel data are converted into pages of random length. Pages are split into parts for transmission in packets. Packet size is aligned with payload volume of noise-type signals. Packet code includes either new page start label and page format number, or label of previous page continuation.

EFFECT: efficient utilisation of payload traffic available in an information packet in communication channel with noise-type signal, enhanced flexibility of measured well data transmission sequence.

FIELD: radio engineering, communication.

SUBSTANCE: disclosed is a method for wireless transmission to the earth's surface of data of a base telemetry system with an above-bit unit, which includes measuring downhole parameters, encoding and transmitting signals by emission thereof with an electrode into the rock via a high-speed wireless electromagnetic link, receiving said signals with a base telemetry system and transmitting to the surface through an electrical divider of the base telemetry system. An additional electrical divider is placed in the immediate vicinity of the above-bit unit, said divider having a key element controlled by the base telemetry system and being used to receive signals emitted by the electrode of the above-bit unit. Dipole electrodes are opened when receiving signals with the key element and said electrodes are closed when the base telemetry system transmits signals through the key element. In the disclosed device, dipole electrodes of the main divider are connected to a transmitting unit and dipole electrodes of the additional divider are connected to receiving unit of the base telemetry system.

EFFECT: high reliability of transmitting information data from a downhole unit to a downhole telemetry system and then to the earth's surface.

2 cl, 1 dwg

FIELD: physics, geophysics.

SUBSTANCE: invention relates to geophysical studies during drilling of oil and gas wells using telemetering systems with wireless electromagnetic data link. The power supply and bottomhole information transmission unit contains the turbine, electrical generator, electrical separator in assembly with the drilling string, module of sensors for measuring of bottomhole information and electronic unit. Meanwhile the electronic unit contains the bidirectional triode thyristor unit, bidirectional triode thyristor control unit, impulse signal current sensor, voltage sensor of the power winding of the electrical generator and temperature sensor, meanwhile the electronic unit is installed in tight compartment of the electrical generator housing, which in addition functions as a heat sink. Besides bidirectional triode thyristors are installed on the electrical generator housing itself, and the electronic unit is designed with a possibility of automatic stabilization of the current of transmission impulse signal and its restriction at exceeding the preset temperature of the bidirectional triode thyristor unit.

EFFECT: improvement of reliable transmission of impulse signals via electromagnetic data link and maximum possible depth of drilling.

4 cl, 1 dwg

FIELD: oil and gas industry.

SUBSTANCE: generator, external stator placed in as sealed body, internal rotor installed at the generator shaft with roller bearings in sealed cavity filled with a lubricant coolant and sealing components. At that the generator sealed body is divided into three sealed loops - electrical, kinematic and protective ones. Electric loop of the stator is equipped with an independent compensating diaphragm and filled with cooling liquid and separated from the kinematic loop by a screen made of non-magnet material. Kinematic loop of the bearings is filled with lubricant and separated by a system of cup-type seals and inner diaphragm from the protective loop of an end sealing compensator filled with lubricant in the volume limited by the outside diaphragm. The electrical loop is filled with dielectric cooling liquid without excessive pressure; the kinematic is filled with dielectric cooling liquid without excessive pressure; protective is filled with dielectric cooling liquid under excessive pressure. Besides, the protective loop may be filled with lubricant having higher viscosity and higher boundary tension in comparison with lubricant in the kinematic loop. Zero point of the stator windings is coupled to the body through a plugging contact. The filling system for the protective and kinematic loops has a valve spindle to switch between the filled loops at vacuuming and filling of lubricant. Rigidity of diaphragms in the electric and kinematic loops is higher than the same in the protective loop.

EFFECT: improving reliability of the generator and reducing labour intensity during repair and maintenance operations.

6 cl, 1 dwg

FIELD: physics; geophysics.

SUBSTANCE: invention relates to geophysics and can be used in logging operations. Disclosed are methods and systems for downhole telemetry using a device configured or designed for deployment in a drilled well which crosses an underground formation. The device includes a downhole telemetry unit, a surface telemetry unit and a line for transmitting data between the downhole and surface units, configured to designed to transmit data over one or more data transmission channels using at least one telemetry circuit selected from a plurality of telemetry circuits based on at least one downhole parameter.

EFFECT: high quality of transmitting exploration data.

26 cl, 7 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to logging in drilling and serves to transmission of measurement signals from the well to surface via wireless communication line. Proposed method comprises excitation of electric current in well tubing divided by dielectric inserts into top and bottom parts and registration of voltage change caused by current pulsation in tubing on the surface. Note here that wanted signal represents the voltage variation at receiver cylindrical coil terminals that makes the function of AC in pipe excited by alternating e.m.f. applied to dielectric insert. Proposed device comprises AC source connected to tubing in well divided by dielectric insert into top and bottom parts and surface cylindrical receiver coil with magnetic core composed of a hollow cylinder arranged coaxially at said tubing. Note here that several coil can be used arranged one above the other and equipped with band amplifiers their outputs being summed at voltage registrar input.

EFFECT: simplified and accelerated transmission of signals from well bottom.

2 cl, 1 dwg

FIELD: oil and gas industry.

SUBSTANCE: method is suggested for terrestrial data transfer and receipt in drilling process, which includes receipt of data from sensors of the bottomhole telemetry system, terrestrial data transfer with their further decoding and data transfer to the registers of information users. At that data transfer is carried out through cables of the power lines feeding the registers of information users and surface sensors installed at the drilling site and pumping equipment. Besides receivers receiving data from sensors of the bottomhole telemetry system, surface sensors, the basis computer and receivers in the registers of information users are equipped with electrical PLC-modems with the embedded network protocol including an interface block and programming interface units for data receipt and transfer through power lines. The device for implementation of the above method is also claimed.

EFFECT: ensuring on-line monitoring of the remote registers distributed at the drilling site, improving reliability and operating convenience of the terrestrial data transfer system.

2 cl, 1 dwg

FIELD: mining.

SUBSTANCE: drill string bottom part assembly comprises downhole motor fitted at said drill string and having rotor and stator. Note here that first hole is made in said rotor. Spindle arranged under downhole motor with second hole made therein. Third hole is made in the shaft with first and second ends. First end is coupled with rotor via first universal adapter. Second end is coupled with spindle via second universal adapter. Inner rod is fitted in the shaft third hole. Note here that inner rod has inner passage and third and fourth ends. Third end seals communication of inner passage with the rotor first hole while fourth end seals communication of inner passage with the spindle second hole.

EFFECT: transducer signal transmission, power supply inside assembly spinning elements.

21 cl, 8 dwg

FIELD: electricity.

SUBSTANCE: system of connection to current-carrying lines consisting of current-carrying shell line, first current-carrying line, second current-carrying line and third current-carrying line includes: first control module capable to connect with the first current-carrying line and stay in serial connection with first electricity receiver in the well, connected to the second current-carrying line; second control module capable to connect with the second current-carrying line and stay in serial connection with second electricity receiver in the well, connected to the first current-carrying line; third control module capable to connect with the first current-carrying line and stay in serial connection with third electricity receiver in the well, connected to the third current-carrying line; and fourth control module capable to connect with the first current-carrying line and stay in serial connection with fourth electricity receiver in the well, connected to current-carrying line of the shell. When the first control module feeds current to the first electricity receiver in the well, second, third and fourth control modules feed uncontrolled current to the second, third and fourth electricity receivers in the well, respectively.

EFFECT: efficient power supply to well devices, particularly reduced number or complete elimination of electric power receivers of well devices, fed by uncontrolled current or obtaining electric power in other uncontrolled ways, due to isolation of current fed to receiver.

18 cl, 6 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