Method of control over downhole instrument operation

FIELD: mining.

SUBSTANCE: proposed method comprises determination of drilling column operating parameters and variation of downhole instrument operation mode depending upon said parameters. Note here that for data transfer to downhole instrument drilling column parameters are abruptly changes by preselected program to fix time intervals between sharp changes in drilling column working parameters with that fixed set of time intervals can be used for variation of downhole instrument operating mode.

EFFECT: simplified and reliable control.

 

The proposed solution relates to the field of geophysical research wells. Preferred area - drilling directional wells.

At wells survey instruments without the use of the hoist cable, the problem arises to control the operation of the instrument in the borehole. Known registrars downhole parameters involved in the program timer time (U.S. Pat. 2296218 of the Russian Federation, IPC EV 44/00; U.S. Pat. 2143557 of the Russian Federation, IPC EV 47/12). Such solutions are simple, but provide a limited number of transactions and not reliable. Bilateral communication channel slaughter-mouth (U.S. Pat. RF 2161701, IPC EV 47/022; U.S. Pat. USA 4839644, IPC G01V 1/00; U.S. Pat. USA 5412568, IPC G01V 1/00) allows to solve a sufficient number of management tasks downhole device, but requires a more complex downhole equipment, which is not always possible technologically, and lowers the reliability of the equipment in the well.

Known transmission system logging information during the drilling process, in which in addition to measuring downhole parameters essential element of the system is the sensor moves the drill, which disables the system during drilling and including it in the moment, stop drilling. (U.S. Pat. USA 4597067, IPC NN 9/00 - prototype). The method is quite simple by design, but ensures that only one operation: VK is Uchenie / off downhole tool.

The purpose of the proposed solution - the creation of a simple and reliable method of controlling the operation of the downhole tool.

The method of controlling the operation of the downhole tool includes a definition of parameters of mechanical motion to the drill and change the mode of operation of the downhole tool depending on changes of parameters of mechanical motion to the drill. When sending information to the downhole device to produce a dramatic change in the parameters of the mechanical movement of the drill according to the prearranged program, fixed in the downhole tool intervals between abrupt changes in the parameters of the mechanical movement of the drill string and the set of fixed periods of time to produce a change in the mode of operation of the downhole tool.

The method is as follows. In the downhole tool place the sensor parameters of the mechanical movement of the drill string, for example, an accelerometer with a bandpass filter at the output, which is connected through a decoder with an input device of the downhole tool. In this case, use the property of the accelerometer when vibrations occur drill string to produce the output series high-frequency oscillations. The vibration of the drill is formed with a sharp change of parameters of mechanical motion, for example if sudden braking or jerk. If the need to change the mode of operation of the downhole tool, on the surface encode information for transmission to the slaughter interval code, stop drilling and produce a series of changes in the parameters of the mechanical movement of the drill string, for example, allow the column to fall under its own weight and dramatically slow down, which leads to the appearance of vibrations measured by the accelerometer. The number of jerks drill string and the length of the intervals between them define the interval code is transmitted to the slaughter, thus indicating, for example, "0" as a pause of 5 seconds, a "1" - 15 seconds. The accelerometer in the borehole using a bandpass filter extracts moments braking drill, transmits that data to the decoder that recognizes came code, based on the famous decoder Dina gap for "0" and "1", and transmits it to the input of the control device of the downhole tool.

Can be used as a motion sensor gyro, which produce moments of sudden stops rotational motion. Known and other sensor parameters of the mechanical movement of the column.

Small changes in the design of the downhole tool and software allow enabling/disabling of the downhole tool, modify as necessary the measurement mode and/or transmission of information.

The method of controlling the operation of the downhole tool, including the surrounding determination of the parameters of the mechanical movement of the drill string and change the mode of operation of the downhole tool based on changes in parameters of the mechanical movement of the drill string, characterized in that for the transmission of information to the downhole device to produce a dramatic change in the parameters of the mechanical movement of the drill according to the prearranged program, fixed in the downhole tool intervals between abrupt changes in the parameters of the mechanical movement of the drill string and the set of fixed periods of time to produce a change in the mode of operation of the downhole tool.



 

Same patents:

FIELD: oil and gas industry.

SUBSTANCE: method consists in excitation of an electric current in a metal string in a well by means of a ground-based generator connected with one contact to surface part of the metal string and with the other contact to a receiving electrode on the well surface. Commutation of a dielectric insert dividing the metal string in the well into upper and lower parts is performed. Another string of metal pipes lowered to that well is used as the receiving electrode. Therefore, an electric circuit of a metal string in the well and a receiving electrode is formed, via which direct current stabilised as to the value is transmitted from the ground-based generator. Reception of information from the well working face is performed depending on modulation of the value of stress caused by commutation of the dielectric insert. As a ground-based generator there used is a source of stabilised direct current, and as a receiving electrode there can be used a metal string of the tubing.

EFFECT: improving reliability of information transmission from the working face via an electromagnetic communication channel and enlarging the application scope.

4 cl, 1 dwg

FIELD: mining.

SUBSTANCE: retaining device (13) inserted into a central channel of a drilling string component. The channel has the first diameter on at least a part of the central section of the drilling string component, and the second diameter near the ends of the drilling string component. The second diameter is less than the first diameter. The retaining device (13) comprises a lengthy body (14), forming at least partially a jacket for a transfer line. The lengthy body (14) has transverse dimensions less than the second diameter. Multiple arc elements (15) are arranged along the lengthy body (14). Arc elements are separate from the lengthy body and are attached to it.

EFFECT: arc elements are elastically bending for provision of their displacement through the second diameter and have the largest chord that is more than the first diameter in free condition for creation of an opportunity of expansion in the first diameter after stretching via the second diameter.

3 cl, 9 dwg

FIELD: physics.

SUBSTANCE: electrodes are separately exposed to the impact of periodically accumulated potential energy of a spring, which is generated by rotating screw pairs and abrupt (impact) release of energy when screw interaction of crests of the screw pairs ceases. The apparatus for realising the method is a drive structure having an output shaft which actuates the screw pairs. During forward rotation, the screw pairs open centralisers and elastically press the electric leads to the wall of the well casing, apply periodic action on the electrodes that are rigidly connected to the electric leads. The electric leads are cut into the wall of the well casing. Impact action occurs when screw interaction between the screw and nut, which is pressed by a power spring, ceases.

EFFECT: improved electrical contact between electric leads and a casing column.

10 cl, 4 dwg

FIELD: physics.

SUBSTANCE: disclosed is a seal assembly for an electrical logging probe, having a cylindrical housing, a plurality of dielectric inserts placed in the housing, a plurality of annular electrodes coaxially placed in the housing between the dielectric inserts and touching the end faces of the dielectric inserts with their end faces, an insulating means placed on the cylindrical housing for electrical insulation of the plurality of annular electrodes from the housing. According to the invention, each of the plurality of annular electrodes and dielectric inserts in contact with the annular electrodes have bevel end faces. The bevel end faces of the electrodes are interfaced with the bevel end faces of the dielectric inserts that are in contact with them. The seal assembly has a means of generating a compression force and fixing, which is in contact with the end face of the dielectric insert, placed distally with respect to said dielectric insert which is in contact with the cylindrical housing.

EFFECT: high containment of electric equipment of the probe from the external medium of the well and improved probing data.

12 cl, 5 dwg

FIELD: radio engineering, communication.

SUBSTANCE: disclosed is a method of transmitting measurement data by a cable-free telemetric system when drilling wells, involving encoding and transmitting information via a phase-shift keyed signal in form of a sequence of pulses, synchronising the signal and receiving the encoded information by a land receiver. One-time (initial) phase synchronisation of precision quartz-crystal oscillators of the transmitter of the bottom telemetric system and the land receiver is carried out by accumulating data on the transitioning of the signal through zero and one-time synchronisation of signals using a priori information on the bottom telemetric system at the current moment in time is also carried out. Prolonged stability of synchronisation of said oscillators is ensured by adjusting the phase of the quartz-crystal oscillator of the land receiver relative to the statistically determined transitioning through zero of the signal of the transmitter of the bottom telemetric system.

EFFECT: higher capacity of the communication channel and high noise-immunity thereof.

1 dwg

FIELD: oil and gas industry.

SUBSTANCE: system includes flexible tubing having a fibre optic conductor and a section with instruments. At that, fibre optic conductor is located in a cavity flush with outer surface of the section of flexible tubing equipped with instruments. Besides, the above cavity is curved. The system also includes a device for fixing the fibre optic conductor on the surface of the wall of flexible tubing, an adapter through which the above conductor passes to an internal fibre optic conductor, and a connecting coupling. The latter has the possibility of data transferring by means of contactless telemetry.

EFFECT: improving measurement efficiency of one or more parameters in the well along a certain zone of the well.

21 cl, 9 dwg

FIELD: electricity.

SUBSTANCE: method to transfer information from a well consists in the following: using a surface generator, electrical current is excited in a string of metal pipes, which generates electromagnetic field spreading in the rock of the well, which reaches the bottomhole area and creates the difference of potentials between the metal string and its isolated part. Receipt of information from the bottomhole is carried out depending on modulation of the voltage value required for stabilisation of the surface generator DC. The surface generator is a source of a stabilised DC. Besides, the surface generator is connected with one clamp to a surface part of the pipe string, and by the other one - to a grounded electrode that is remote from the well head. At the same time for transfer of information from the bottomhole the lower and upper parts of the string are closed or opened, changing the efficient value of conductivity between the grounding electrode of the current source and the metal string. When the key is closed, the specified efficient conductivity increases, and voltage on the current source clamps reduces and is recorded by a recording unit. By variation of the measured voltage the parameters of the drilled bed are decided.

EFFECT: increased reliability of information transfer from a bottomhole and expansion of its application area.

2 cl, 1 dwg

FIELD: measurement equipment.

SUBSTANCE: formation method of measurement data packages of a cable-free telemetric system during the well drilling involves coding of every four bits of information with a noise-like signal (NLS) with the length of 16 bits and information transfer by means of a phase-shift signal, packages of various types. The data measured in dynamics in the turbine drilling mode is transferred in S-O1-Z-O2-A-O3-"Г"-O4 packages consisting of synchronisation sending (S), diverter (O1), zenith (Z), diverter (O2), azimuth (A), diverter (O3), gamma background level ("Г"), diverter (O4). The data measured in dynamics in the rotary drilling mode is transferred in S-1-"Г"1-R1-"Г"2-R2-"Г"3 packages consisting of synchronisation sending (S), special NLS equal to one and serving for identification of the package type, gamma background level ("Г"1), formation resistance (R1), gamma background level ("Г"2), formation resistance (R2), and gamma background level ("Г"3). The data measured in statics is transferred with S-9-"Г"1-Z-R-A-"Г"2 packages consisting of synchronisation sending (S), special NLS equal to 9 and serving for identification of the packages type, gamma background level ("Г"1), zenith (Z), formation resistance (R), azimuth (A), and gamma background level ("Г"2).

EFFECT: increasing informativity of transferred parameters owing to increasing transfer frequency of logging parameters of gamma background and formation resistance.

4 cl

FIELD: oil and gas industry.

SUBSTANCE: method for determining the saturation of reservoir beds involves determination of porosity coefficient of the investigated formation using two-probe neutron-neutron logging as per thermal neutrons. Calculation of porosity function as the ratio of intensities of flows of thermal neutrons. Recording of GIRZ spectrum intensities. Measurements are carried out during cement setting period of time after 2-4 days from the beginning of cementing of the well shaft, or 2-4 hours after the drilling tool has been raised out of the well. There are cross-plots as per dependences. On cross-plots there performed is approximation of lower points of quadratic function, which correspond to water-bearing formations with drill mud filtrate, and the function reflecting "deficiency of density and hydrogen content" in the nearest zone is calculated as per the given formula.

EFFECT: enlarging the range of application; improving its accuracy and informativity.

4 dwg, 2 cl

FIELD: oil and gas industry.

SUBSTANCE: method involves lowering of packers and equipment for extraction (pumping) of product in interval of product extraction on tubing string located against each productive formation. Down-hole measurements are performed by sensors. Obtained date is transmitted to ground receiving-processing unit by means of electronic self-powered measurement modules transmitting data signals by tubing string by electromagnetic pulses to common electronic self-powered transmitting module. Module is installed in tubing string assembly above the highest productive formation. Data high-frequency signals are amplified and transmitted to ground receiving-processing unit through rock. Equipment for extraction (pumping) of product is controlled by communication channel or by hydraulic communication channel using independent electronic modules. Modules contain housing in which the following is installed: valve for control of supply (removal) of fluid medium controlled by step-type tiny engine with driving mechanism of valve gate rotation, autonomous power supply unit, receiver of fluid pulses and dipole receiver of electromagnetic oscillations, amplifier modules of decoding device and power amplifier.

EFFECT: improving efficiency of monitoring of simultaneous separate operation of wells by means of provision of reliability of data transmission by two-way wireless communication between well equipment and ground receiving-processing unit.

8 cl, 6 dwg

FIELD: well drilling technologies.

SUBSTANCE: method includes cutting a special conic thread, which is made with triangular profile with rounded corners, at sleeve and nipple portions of electric separator, sand-stream treatment is performed and also grease is removed from parts screwed together. After that a sub-layer is applied to increase adhesive metal properties. Composition dielectric material is applied to threaded connection of nipple portion, after that thread shape is altered by this material, then adhesive is applied to screwed surfaces of threads and sleeve and nipple portions of electric separator are screwed together. After that a layer of dielectric substance is applied along outer surface of subs. Inside the electric separator a dielectric insert is mounted or dielectric film is applied by pressing method with use of press-form. Dielectric film is applied on outer surface of electric separator by forming method under pressure with use of press-form or of composition dielectric material by winding method.

EFFECT: higher durability and reliability.

1 dwg, 1 ex

FIELD: oil producing industry; pumping facilities.

SUBSTANCE: method includes lowering of tubing with packer and support into well. Support is provided with bypass ports and seat. Then releasing of packer is carried out. Equipment is fitted on smooth flexible pipe on the ground. For this purpose lower end of flexible pipe is first passed through channel of sealing unit for displacing flexible pipe relative to sealing unit, and then pipe end is passed through stepped through channel and pumped out medium supply channel in jet pump housing, after which end piece is connected to lower end of smooth flexible pipe and instrument for surveying or treatment of producing formation is connected to lower end of flexible pipe, for instance, logging device or perforator and then sealing unit is arranged in stepped through channel of jet pump and flexible pipe with jet pump and instrument for surveyor treatment of producing formation is lowered through tubing into well. When jet pump reaches support, jet pump is fitted in seat in support after which smooth flexible pipe is lowered until instrument for surveying or treatment of producing formation reaches zone of surveying or treatment of producing formation. In process of lowering of smooth flexible pipe, recording of background values of physical parameters of rocks, for instance, temperature patterns, is carried out.

EFFECT: optimization of preparation of jet plant for operation, increased of jet plant at surveying and treatment of crooked and horizontal wells with open or cased hole.

2 cl, 1 dwg

FIELD: oil producing industry; pumping facilities.

SUBSTANCE: proposed well jet plant contains packer and jet pump installed on tubing. Pump is provided with nozzle and mixing chamber with diffuser installed in housing, and stepped through channel is made. Possibility is provided for fitting functional inserts in through channel, for instance, for recording formation pressure built-up curves, and self-contained logging complex is installed on tubing lower than packer for checking physical values, for instance, specific electric resistance of rocks. Jet pump is arranged in casing over producing formation of well. Ring is arranged on tubing lower than packer to center packer in casing. Packer is made of elastic material in form of open-top cup with cone-shaped side wall. Bottom of cup is hermetically secured on tubing, and packer, in its position before removing, has the following dimensions: maximum outer diameter of packer side wall D2 is 0.75-0.99 of inner diameter D1 of casing; length L of packer is from 0.5 to 3 diameters D4 of packer cup bottom; maximum inner diameter D3 of side wall of packer cup is 0.6-0.96 of maximum outer diameter D2of packer cup; and outer diameter D5 of centering ring is 0.8-1.05 of diameter D4 of packer cup bottom.

EFFECT: intensification of surveying and testing of walls with open and cased holes, mainly crooked and horizontal holes, optimization of sizes of packer operating together with jet pump and self-contained logging complex, improved reliability of well jet plant.

2 cl, 1 dwg

FIELD: oil producing industry; pumping facilities.

SUBSTANCE: according to proposed method jet pump with stepped through channel in its housing and packer with through channel and complex logging device are lowered into well on tubing string. Logging device is installed under packer on tubing string. Perforated section is made on tubing string from side of its lower end. In process of lowering, using logging device, background values of physical parameters of producing formations are recorded, and then packer is released. Packer is installed higher than producing formations under surveying, and complex logging device is installed in zone of producing formations. Then depression insert is installed in stepped through channel of jet pump housing to separate tubing string, and working liquid medium is fed into nozzle of jet pump, thus building different value depressions in underpacker space of well. At each value of depression, well production rate is measured and then, with jet pump operating, complex logging device is moved along producing formations by displacing tubing string without depacking of packer and geophysical parameters of producing formations are recorded. After completion of surveying, depacking of packer and lifting of tubing string with jet pump and logging device to surface is done.

EFFECT: provision of intensification of surveying, testing and preparation of wells, mainly, horizontal and highly slanted wells, optimization of functions of packer and improved reliability of jet plant.

1 dwg

FIELD: oil industry.

SUBSTANCE: at least one acoustic dynamic is mounted immediately on product pipe in oil well and acoustic characteristic of flowing environment flow is determined in product pipe. It is sent into surface controller, using product pipe. Using surface controller flowing substance flowing mode is determined, on basis of which working parameters of oil well are adjusted. Working parameters of oil well can be adjusted to detect Taylor mode of flow. For adjustment of working parameters throttle is used and/or controlled valve of oil well, controlling amount of gas, forces into product pipe. For determining mode of flow of flowing environment artificial neuron net can be used. It is possible is provide energy for acoustic sensor through product pipe. It is possible to determine additional physical characteristics of flowing substance, for example pressure and temperature.

EFFECT: higher efficiency.

3 cl, 22 dwg

FIELD: mining industry.

SUBSTANCE: system has first induction throttle, second induction throttle and controlled switch. Second induction throttle is positioned near second branch of pipeline structure. Controlled switch has two outputs. First switch output is electrically connected to pipeline structure on the side of induction throttles connection, where first and second branches of pipeline structure intersect. Second output of switch is electrically connected to pipeline structure on other side of at least one induction throttle. Pipeline structure can be positioned inside oil well, and can have casing string and operation tubing column. Also described is method for extracting oil products from oil well using said system.

EFFECT: higher efficiency.

4 cl, 10 dwg

FIELD: oil producing industry; pump facilities.

SUBSTANCE: method comes to mounting the following device onto tubing string: pump with through channel, packer and liner with intake funnel, lowering the assembly into well, releasing the packer and creating required drawdown in underpacker zone by pumping liquid medium out of underpacker zone by jet pump. Assembly is furnished additionally with unit for disconnecting and connecting tubing string, and valve unit with seat for mounting check valve, and then tubing string is assembled in definite sequence. After these operation, investigation, testing and completion of well are carried out. Then well is set in operation.

EFFECT: intensified investigation, testing and completion of horizontal crooked wells, improved reliability of formation tester.

2 cl, 3 dwg

FIELD: oil producing jet units.

SUBSTANCE: proposed formation tester contains jet pump, unit for connecting and disconnecting tubing string, valve unit with seat for valve insert with check valve, packer and liner with intake funnel, all mounted on tubing string from top to bottom. Jet pump housing accommodates coaxially installed active nozzle and mixing chamber, and channels are made to deliver active medium, pumped out of well and stepped through channel with seat between steps. Possibility is provided for in-turn mounting of sealing unit and interlock insert with through channel which are arranged on flexible smooth pipe higher than tip for connecting self-contained logging complex and insert for recording pressure built-up curves I underpacker space of well under which self-contained instruments are installed for recording pressure, temperature and other physical parameters of well and forming fluids. Invention provides intensification of investigation, testing and preparation of wells, mainly, horizontal and high curvature wells, optimization of operation of jet pump used together with self-contained logging complex and other functional insets for investigation of producing formation.

EFFECT: improved reliability and increased capacity of operation.

3 cl, 3 dwg

FIELD: oil producing industry; pump facilities.

SUBSTANCE: according to proposed method, the following devices are mounted on tubing string in turn from top to bottom: jet pump, upper mechanical packer, lower packer made of elastic material, centering ring, and, on lower end of tubing string with perforated section, self-contained logging complex is installed and said assembly is lowered into on tubing string. In process of lowering, recording of background values of rock physical fields is done and when self-contained logging complex reaches design depth, upper mechanical packer is released and functional insert is installed in stepped through channel of jet pump to record pressure built up curves and then, by delivering liquid medium into nozzle of jet pump, at least three step rising values of drawdowns are built in underpacker zone and by measuring amounts of pumped out liquid on surface during each down, yields are found, and then drawdowns are built additionally and rock physical fields are recorded by self-contained logging complex.

EFFECT: improved reliability and increased capacity at investigation and testing of formations in wells with walls not strengthened by casing string, improved accuracy of geological-field information at earlier stages of well building.

2 cl, 3 dwg

FIELD: oil producing industry; testing facilities.

SUBSTANCE: invention relates to pumping facilities. Proposed ejector multifunctional formation tester has mechanical or hydromechanical packer installed on tubing string for fixed positioning in released state in well at preset depth, jet pump accommodating nozzle and mixing chamber with diffuser in its housing, and stepped through channel is made with possibility of fitting functional inserts, for instance, functional insert for recording pressure built up curve. Jet pump is located in casing string over well producing formations, self-contained logging complex is installed lower than packer on tubing string for measuring, for instance, specific electric resistance of rock or for action onto formation by physical fields, for instance, acoustic fields, and second additional packer is installed being made of elastic material in form of open-top cup with conical side wall. Cup bottom is hermetically secured on tubing string, and ring is arranged on rubbing string lower than additional packer for centering packer in casing string, distance between packers being not less than outer diameter of tubing string in place of mounting of additional packer. Thanks to it intensification of investigation and testing of wells with open or cased hole, primarily crooked or horizontal ones, optimization of arrangement of packers at their operation together with jet pump and self-contained logging complex are provided.

EFFECT: improved reliability of operation of well jet plant.

2 cl, 1 dwg

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