Method of well imaging

FIELD: mining.

SUBSTANCE: present invention relates to well enviroment imaging method using well visualization system. Disclosed is well enviroment imaging method using well imaging system, which contains following stages: movement of downhole tool into borehole environment; reading during movement of one or more physical parameters using one or more sensors, generating sensors signals, reflecting one or more physical parameters in borehole environment; processing of sensors signals for providing of sensors data; temporary storage in well data buffering device of buffered sensors data received with preset sampling frequency; transmission of first part of sensor data into wellhead data processing device with specified first transmission rate, which is equal or less to said sampling frequency; processing first part of sensors data using wellhead data processing device and well enviroment imaging based on first part of sensors data; sending control signal from wellhead data processing device to downhole data processing device based on event, for example, abrupt change of one or more physical parameters during well enviroment imaging, with changing so transmission speed from first transmission rate to second transmission rate; transmission of at least partially, second part of data stored in downhole data buffering device to wellhead data processing device; and well enviroment imaging based on first part of sensors data and second part of sensors data, chronologically before and after said event, without reversing of downhole tool movement.

EFFECT: technical result is optimizing data transmission under various operating conditions.

9 cl, 10 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: invention relates to oil industry, in particular to oil production from wells by the mechanised method, and can be used in any type of pump electric drives. Under the method at wellhead passive acoustic multi-phase flowmeter is installed. Well is operated using the rig with electric drive, and electric drive control station. Well yield and watercut as per phases are determined every second under real time mode. Yield is averaged for selected time period. Further yields as per phases are compared with set process parameters. If watercut values are beyond the set limits the amount of transferred by pump produced water is reduced upon keeping of the commercial oil yield at set level. For this one of action is performed: capacity of pump unit is reduced due to motor speed; capacity of pump unit is increased due to increasing of the motor speed; the pump unit is stopped for definite time for oil accumulation at the wellhead.

EFFECT: yield keeping at set level upon reduced power consumption.

1 ex, 1 dwg

FIELD: measurement equipment.

SUBSTANCE: invention relates to measurement of perforations in oil wells. The method comprises a. placement of the logging device comprising an ultrasonic receiver-radiator in a well with a casing pipe, and the ultrasonic receiver-radiator has a focal point located at a distance from the ultrasonic receiver-radiator so that it is located behind the internal surface of the casing pipe. b. radiation of ultrasonic signal from the ultrasonic receiver-radiator, c. detection of reflection of ultrasonic signal from internal part of the perforation passing through the casing pipe into formation, d. measurement of time passed between the transmission and reception of ultrasonic signal, e. determination of position of the ultrasonic receiver-radiator, corresponding to ultrasonic transmission and reception of the reflected signal, f. iteration of the step b) - e) several times and record of the obtained data. g. computer processing of the obtained data and determination of sizes of the perforation, h. meanwhile the ultrasonic receiver-radiator is located at a distance from the casing pipe of a borehole, at least, one third of the minimum length of the open channel to be measured, i. meanwhile the distance is such that reflections from the casing pipe reverberate and significantly dissipate before the reflection from inside the perforation is received by the ultrasonic receiver-radiator.

EFFECT: reduction of reverberation noise.

12 cl, 12 dwg

FIELD: physics; geophysics.

SUBSTANCE: invention relates to geophysics and can be used in prospecting for oil and natural gas deposits. Disclosed is an electromagnetic array configured for use in an underground borehole. The array includes a plurality of axially spaced electromagnets and is configured to generate a magnetic field pattern having at least first and second pairs of magnetically opposing poles. Passive ranging measurements of the induced magnetic field may be advantageously utilised, for example, to survey and guide continued drilling of a twin well. The electromagnetic array may also be used in active ranging. An array of permanent magnets providing a similar magnetic field pattern may also be used in active ranging.

EFFECT: high accuracy of survey data.

3 cl, 15 dwg

FIELD: oil and gas industry.

SUBSTANCE: according to the method fluid pumping from the well is alternated with fluid accumulation in the well at switched off pump set and average delivery in time is controlled for the purpose of matching with the well flow rate by changing speed rate of the pump shaft. Pump capacity in pumping process is controlled by a submersible flow rate meter placed at the pump output. Pumping out will be performed till the pump reaches the preset minimum pressure at suction and accumulation will be performed till the pump reaches the preset maximum pressure. Pressure value is controlled by means of a submersible pressure sensor. Frequency of the pump shaft rotation during pumping period is changed on the basis of readings of the submersible flow rate meter so that maximum value of efficiency factor is reached for the pump during pumping period. Time of accumulation is limited by regulations on motionless fluid in surface equipment in winter time by permitted decrease of oil temperature in the submersible electric motor and permitted frequency of stops and starts of the latter. Maximum pressure value for the cemented stratum is selected on condition of maximum oil production and for the stratum destructed intensely in extraction process on conditions of minimum discharge of mechanic impurities.

EFFECT: increased production and maintained reliability for submersible equipment due to its operation in the mode of maximum efficiency factor.

FIELD: measurement equipment.

SUBSTANCE: invention relates to the field of instruments moving in shafts of wells, drilled via underground beds of mountain rocks. A well measurement instrument comprising a jacket made as capable of displacement inside the well shaft, at least one sensor made as capable of measurement of the well shaft parameter, a controller installed in the jacket comprising at least one of the following: a data saving device and an operation control device, at least for one sensor, and the first port of optic connection installed in the first opening in the jacket, besides, the first port of optic connection includes a light source controlled with the help of electricity, besides, the first hole in the jacket tightly closed by the port plug having an optically transparent window, besides, the port plug is made as capable of resisting the inlet of fluid medium of the well inside the jacket, and the second port of optic connection installed in the second opening in the jacket, besides, the second port of optic connection includes a photodetector, besides, the second opening in the jacket is tightly closed with the port plug, having an optically transparent window, besides, the port plug is made as capable of resisting inlet of fluid medium of the well inside the jacket.

EFFECT: transmission of data on working condition of an instrument and/or data saved in the instrument, and/or transmission of control signals and working instructions to such instruments during location of instruments on earth surface.

13 cl, 5 dwg

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil and gas industry, namely to method of tightness testing of the cased injection well. Methods includes: determination of actual pressure difference on the packer ΔCp_a=Pwh1-Pfr-Cwh2+Cfr2-Perr1-Perr2, where Pwh1 and Pwh2 are measured wellhed pressure on injection to top and bottom reservoirs, respectively, Cfr1 and Pfr2 are pressure losses for friction during water movement via short and long strings. respectively, Perr1 and Perr2 are absolute errors of measurements by technical pressure gauge in short and long strings, respectively, atm. At that criterion of the tightness estimation is the pre-specified critical pressure difference ΔCd_cr. System tightness is estimated by comparison of the actual pressure difference on packer ΔCp_a and pre-specified critical pressure difference at |ΔCp_a|>|ΔCd_cr| the system is tight. Method of the tightness testing of the injection well contains stages at which: pressure change is registered in well blocked by the packer, by wellhead pressure measuring at input to tubing string in top and bottom reservoirs, respectively. Data analysis is performed, and tightness is determined. At that preliminary current water flowrate via pipeline is measured Q. Tightness is estimated if the following condition is met: ΔCw_cΔCw_a(QcQa)2, where ΔCw_c and Qc are measured current wellhead pressure difference and current water flowrate, respectively; ΔPw_a and Qa are actual measured current wellhead pressure difference and current water flowrate, respectively. If the condition is met the well is tight.

EFFECT: decreased number of tightness tests in wells operated under process of simultaneous-separate injection.

16 cl, 2 tbl, 2 dwg

FIELD: mining.

SUBSTANCE: electronic probe is offered which contains a metal power supply compartment 1 and a plastic housing 2 conjugate to it where a measurement unit 3, and also a signal processing unit 4 designed as a microcontroller unit, and a magnetic antenna 5, which are filled with a moisture resistant compound. The measurement unit 3 comprises a tilt sensor 6 of longitudinal axis with reference to the horizon, a roll sensor 7 and a pulse stabiliser 8. The plastic housing 2 is made of multilayered fibreglass the inner layers of which are made of vitreous fibres with longitudinal and orthogonal orientation in the housing structure, and external layers are made of vitreous fibres with diagonal orientation. The magnetic antenna 5 and the measurement unit 3 have multilayered high-adhesive moisture resistant coating 11, and the microcontroller unit 4 - the coating 12 of varnish with low adhesive ability to the moisture resistant coating of the measurement unit 3 and the magnetic antenna 5, and they are filled during assembly with the moisture resistant compound 13.

EFFECT: improvement of the probe reliability due to strengthening of the housing and reliable sealing of the main electronic units.

3 cl, 3 dwg

FIELD: oil and gas industry.

SUBSTANCE: stopped well is chosen; its flushing is performed, and with that, temperature at the circulation system outlet is recorded. With that, pumping of hot liquid (heat carrier) is performed through annular space, with that, at its inlet the liquid temperature varies as per a periodic law and is recorded, and heat conductivity coefficient λ"п" and coefficients of heat transfer through tubing strings k1 and casing string k2 are calculated as per mathematical formulas.

EFFECT: improving measurement accuracy of an average integral value of heat conductivity of mine rocks as to a well log and determining coefficients of heat transfer through the tubing strings and through the casing string, length of the circulation system of the well.

FIELD: measurement equipment.

SUBSTANCE: invention relates to well measurement devices, used to measure electromagnetic properties of a well shaft. A well measurement instrument is proposed, which includes at least one non-flat antenna configured to transmit and/or receive electromagnetic radiation. At the same time the non-flat antenna includes at least one non-flat loop of an antenna wire turned around the instrument body. Besides, in one version of realisation the non-flat antenna may be considered double-planar, including the first and second sections of semi-elliptical shape, forming the first and second crossing geometric planes. In the other version of realisation axial separation between the non-flat loop of the antenna wire and the central line of the antenna passing along the circumference changes substantially in a sinusoid manner relative to the azimuthal angle along the circumference of the instrument. The sample non-flat antenna according to the invention may be preferably made as capable of receiving and transmitting radiation substantially of purely x-, y- and z-mode.

EFFECT: provision of directional action of an antenna with the possibility to receive signals from different sides.

15 cl, 13 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to production of hydrocarbon raw materials from the productive formation drilled by a well and relates, in particular, to non-radioactive indicators and methods of their use for tracking of movement of treating liquid and formation fluids. The method of the treating liquid movement tracking in the productive formation drilled by a well comprising: preparation of the treating liquid containing multiple indicator additives representing drops of high-viscosity liquid with the diameter no more than 1000 nanometres; pumping the treating liquid with multiple indicator additives into the borehole and productive formation; determination of position and distribution of the treating liquid by registration of changes in the physical properties of the formation caused by inflow of the treating liquid with multiple indicator additives.

EFFECT: improvement of accuracy of determination of position and distribution of the treating liquid by registration of changes in the physical properties of the formation caused by inflow of the treating liquid with multiple indicator additives.

18 cl

FIELD: mining industry.

SUBSTANCE: invention can be used in case of gas-lift operation of wells equipped by free piston-type installations. Invention envisages stopping well, connecting tube space and annular space in wellhead, recording bottom zone and wellhead pressures in tube and annular spaces, and computing well operation parameters using inflow curve plotted according to differences of bottom zone and wellhead pressures. Volume of produced fluid is found from potential output of formation and from condition of output of free piston. When comparing these volumes, parameters of well are computed in the base of minimum volume value.

EFFECT: optimized well operation.

2 dwg

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