Raw hydrocarbons production control system

FIELD: oil and gas industry.

SUBSTANCE: system includes control centre of electric-centrifugal pump to power transformer is connected and output of the transformer is connected by power circuits of submersible cable through input lead with submersible electric motor. In downhole part control unit is connected to power supply source by one input and to the first input/output of the amplifier by the other input/output. The second input/output of the amplifier together with input of power supply source is connected through a pressure-seal connector to independent signal circuit formed by transit insulated conductor laid between stator pack and housing of submersible electric motor connected at the other end through input lead with signal core of submersible cable. In surface part this core is connected to output of remote power supply and to the first input/output of transceiver which second input/output is connected to the first input/output of surface control unit and its second input/output is connected to input/output of the control centre of electric-centrifugal pump. The third output is connected to input of remote power source. The amplifier in downhole part and transceiver in surface part are designed to ensure half-duplex operation during data exchange as bidirectional network. Input lead assembly of submersible electric motor is made according to four-contact circuit. In the downhole part independent signal circuit can be prolonged for the purpose of connection to other equipment placed downstream of submersible centrifugal pump by means of this circuit transit through the downhole part of the system in order to arrange measurement and control of actuating mechanisms placed in other areas of the well space. The downhole control unit contains analogue and discreet measuring channels connected to the processor. Outputs of analogue pressure and temperature transducers and test signal shaper are connected to respective inputs of analogue multiplexor which output is connected to input of analogue-to-digital converter. Its second input/output is connected to the first input/output of the processor and the second input/output of the processor is connected to control input of multiplexor. Discreet measuring inputs are connected to vibration sensor and the third input/output is connected to the first input/output of the amplifier. Number of measured parameters is increased due to additional measuring channels and modification of the processor application software.

EFFECT: improvement of the device operational reliability and simplification of the device.

6 cl, 2 dwg

 

The invention relates to the oil and gas industry and can be used in downhole electric submersible pump (ESP) for control of the current characteristics of submersible electric motors (SEM) and oil reservoirs.

Currently an integral part of the equipment for pumping formation fluid become submersible telemetry system (TMS)which allow you to control a number of operating parameters: temperature and ambient pressure, temperature and oil pressure in the pad, the vibration level in the area of suspension, ESP, etc. This trend is explained by the possibility of solving a number of tasks [Feofilaktov S. C. "high-Precision submersible telemetry system for hydrodynamic tests" // Engineering practice, No. 09, 2010 SS-20]:

control and diagnostics of ESP;

- optimization of operation mode ECP;

- improving the efficiency of hydrocarbon production.

In our country and abroad TMS commercially released a number of companies (JSC NIHD, OJSC "ALNAS" and others). To the equipment TMS, especially to its downhole parts meet strict requirements for reliability, endurance, reliability and accuracy of measurement data.

There are a large variety of TMS, the downhole portion of which is connected to the zero point of the star stator winding SM (Y0 ) [RF patent №60620 U1, E21B 47/00, published 27.01.2007,]. Also known other solutions, such as [US Patent No. 4631536, E21B 47/00, published 23.12.86,], where an information signal is formed on the entrance phase windings pad. The disadvantage of the above solutions is the presence of galvanic coupling apparatus downhole part of the TMS with the stator winding of the pad, which leads, due to the presence of high voltages and currents in the winding, the need for effective protection of TMS from different overvoltages.

Closest to the proposed technical solution is the condition monitoring system a submersible electric motor [RF Patent №45871, IPC NN 7/08 published 27.05.2005,]. The claimed device comprises a control station, transformer, measuring sensors, analog-to-digital Converter, power supply, processor, power amplifier, interface unit with the power line, the site of the current lead, made of insulating pads with contact sockets, which are connected with the stator winding pad. In the present technical solution, to simplify the comparison, can be described as the control unit downhole collection of devices: analog-to-digital Converter temperature 2, the vibration sensors 3 and pressure 10, the processor 7, the amplifier 14, the element 15 and the sensor element 17 of the temperature sensor. The disadvantage of this t is khnichenkova solutions is the presence of a galvanic connection with the winding pad. In addition, this relationship determines the presence of strong electromagnetic interference in a wide range of frequencies, especially when working with industrial frequency converters. All this leads to considerable complication of the hardware TMS, especially in the well part, and, as a consequence, leads to lower reliability, reduces time-to-failure.

The technical result of the invention is to improve the reliability, endurance equipment, the reliability of the measurement information received from the downhole space, and ensuring the correct execution of commands and setpoints that are transferred from the surface to the downhole portion.

This result is achieved through a system management production of hydrocarbons from wells, hereinafter system, is placed in surface and subsurface parts, using the return wire, a common circuit, comprising a housing of a centrifugal pump, the lifting pillar and ground conductors on the surface. The system includes a control station centrifugal pump connected to the power transformer, the output of which power circuits submersible cable is connected via the node of the current lead with a submersible electric motor. In the downhole portion of the downhole control unit one input is connected ucen to a power source, and other input/output connected to the first input/output amplifier. Unlike the prototype of the second input/output amplifier with the input power source is connected through contains a thermal connector to the independent signal circuit formed transit insulated wire laid between the stator pack and the housing SEM, United, on the other hand, via the site of the current input signal with residential submersible cable, which on the surface is connected to the output of remote power source and to the first input/output transceiver unit, the second input/output which is connected to the first input/output control device ground and the second input/output connected to the input/output control station installation electrical submersible pump, and the third output to the input of the remote power source.

According to the invention the amplifier in the downhole portion and a transceiver unit in the surface part is made to provide half-duplex mode of information exchange, by bi-directional schema.

According to the invention, the node of the current lead submersible motor made according to the four-pin diagram.

According to the invention in a borehole, the independent signal circuit may be extended to connect other equipment below ESP by transit this circuit through the wells of the second part of the system, for measurement and control of actuators that are located in other areas of the downhole space.

According to the invention the control unit borehole contains analog and digital measuring channels connected to the processor, and outputs the analog transducers, pressure and temperature, as well as shaper of the test signal is connected to respective inputs of the analog multiplexer, the output of which is connected to the input of analog-to-digital Converter, the second input/output which is connected to the first input/output processor to the second output of which is connected to the control input of the multiplexer, digital measuring inputs are connected to the vibration sensor and the third input/output connected to the first input/output of the amplifier.

According to the invention the number of measured parameters increased due to additional measuring channels and modification of application software processor.

In the proposed technical solution is proposed to establish a separate signal circuit, not connected electrically with the power circuits of the pad. As the return wire, similar to the prototype uses a common circuit - body ESP lifting column and the grounding circuit. For signal circuit uses a four-wire cable is ü for connection pad: three power wires, one signal. The power wires are connected through the corresponding contacts of the current input to the stator windings of the pad. Signal lived connected via the signal contact current lead to transit insulated conductor routed through free technological groove on the outer surface of the stator core (the back of the stator pad, which in its lower part connected to a standard Germersheim. On the other hand to Germersheim connected downhole portion of the system, is attached to the base pad. On the surface of the ground part of the system is connected to the signal conductor of the cable. Thus, the apparatus of the system is protected from the direct effects of the power winding pad. Electromagnetic effects on isolated transit conductor is minimized, since it is located on the periphery of the stator core, in contact with the case, where is influenced by the leakage inductance between the housing and the stator. Specified the inductive coupling is much weaker compared to the main magnetic circuit, which formed a powerful electromagnetic field and, accordingly, occurs EMF different frequencies and shapes that can make significant distortions in the transmitted signals and to impact on the hardware. Consequently, a significant decrease in the influence of the stator winding SEM allows for isite reliability, the endurance of the hardware, the reliability of the measurement information and to ensure correct execution of control commands.

The invention is illustrated by drawings, where figure 1 shows a General block diagram of the control system, production of hydrocarbons, figure 2 - block diagram of the control unit borehole.

The control system (figure 1) contains the control station ESP 1, three-phase power transformer 2, the control unit ground 3, duplex unit 4, remote power supply 5, a signal circuit 6, the power circuit 7, the node of the current lead 8, pad 9, contains a thermal connector 10, the downhole control unit 11, the amplifier 12, the power source 13.

The control unit borehole (figure 2) consists of measuring the pressure transducer 14, a temperature measuring transducer 15, the driver of the test signal 16, a vibration sensor 17, the analog multiplexer 18, a CPU 19.

Management system production of hydrocarbons is as follows. A distinctive feature is the presence of independent signal chain, which consists of signal wires 6 in the composition of submersible cable, connected via the node of the current lead 8 with transit conductor in the stator pad and then through hermetical input 10, with the downhole portion of the system. System operation is initiated by the submission from the source dis is Antonovo power 5 power to the downhole portion of the system is independent of the signal circuit 6. The power source 13 provides the conversion of electric energy remote power supply to power the operation of downhole equipment, as well as provides suppression induced in the signal chain electromagnetic interference. The downhole control unit 11 carries out, in accordance with a given program, measurement parameters, pre-processing, generation and measurement of frames and their transmission through the amplifier 12 in the signal chain. When power to the downhole portion and the transmission of signals is based on one common circuit. This technique is known [U.S. Pat. Of the Russian Federation No. 21618, MKI EV 47/02. Publ. 27.01.02]. The formation of the signals in the downhole portion may, for example, be due to modulation of the remote supply current. These signals, the receiving-transmitting unit 4 and transmitted to the control unit land 3, where the final processing and storage of measurement data, and which can be implemented on a programmable controller or industrial computer. It should be noted that the device 3 via the interface connected to the management station ESP 1 and can function as upper level management, and additions to the management station. The control device 3 can modify the operation mode control unit borehole 1 by filing certain commands from the surface to the downhole portion in the intervals between information personnel. To provide half-duplex communication, two-emitting unit 4 and the amplifier 12 is performed in the bidirectional version. The formation of the commands from the surface to the downhole portion may be, for example, by modulation of the voltage output of remote power source 5.

The process of managing production of hydrocarbons is based on the data of the measurement results of surface and borehole parameters in real time and can be illustrated by various examples, for example, [U.S. Pat. Of the Russian Federation No. 2346156 published 10.02.2009]. Here to improve the extraction efficiency produce different effects on the reservoir and wells (geological and technical activities - GTM). The choice of parameters of the GTO is based on the dynamics of the entire production process with the use of a mathematical model describing the processes with a certain level of adequacy, such as Emaletdinov, A., Baykov IV TO the problem of designing automated control and modeling subsystems of reservoir pressure maintenance DCS production // Vestnik OSU 2004, No. 12, p.160-163.], as:

X'=F[X(t),(U (t),A(t)]

whereXthe state vector of the object (the ratio of inflow, reservoir pressure and flows);

Uthe vector of control actions (pressure and flow rates of wells);

A matrix object parameters (hydrodynamic relations wells).

Identifying the parameters of the selected mathematical model according to the measurements in real time, determine the characteristics and parameters of the GTO, based on specific performance criteria.

As submersible cable can be used a standard four-wire cable, but the preferred option is the manufacture of power cable with three conductors and one of the signal housing that is technologically achievable. As host of the current lead 8 is also advisable to use a standard, three-prong, with a modification under the plug connection signal chain.

An embodiment of the control unit borehole 11 is shown in figure 2. and selected based on the criterion of minimizing the hardware cost. This block works as follows. Processor through analog multiplexer 18 connects sequentially measuring transducers 14, 15 and shaper of the test signal 16 to the input of analog-to-digital Converter 19, which encodes the analog data and transmits it to the processor 20. The vibration sensor 17 in the longitudinal and transverse axes with discrete output signals are connected, similarly to the prototype directly to the inputs of the processor. Measuring pressure transducers 14 and temperature 15 carry out the conversion of the corresponding parameter in the output analog electrical signal. The driver of the test signal 16 provides testing and calibration of the measuring path. The processor 20 receives the measurement information, pre-processes it, for example, carries out the calibration and correction of systematic errors, generates telemetry frames and outputs the signals to the input of amplifier 12. The power source 13 provides power to all nodes in the block 11. In the measuring and control unit 11 may also include other transducers, it is necessary to increase the number of inputs of the analog multiplexer 18 (or have a backup), and customize application software processor 20.

Signal circuit may be continued for connecting other equipment below ESP by transit this circuit through SK is ainuu part of the system. While it is possible to organize measurement and control of actuators located in other areas of the downhole space.

Work ESP occurs regardless of the mode of the measuring part and is similar to the prototype, i.e. the command control station 1 takes the power supply to transformer power 2 and power circuits 7 submersible cable on the pad, the rotor of which rotates and drives the centrifugal pump.

Thus, the claimed system can improve the reliability, operating life of the equipment, by simplifying circuit design, the reliability of the measurement information received from the downhole space, and to ensure the correct execution of commands and setpoints that are transferred from the surface to the downhole part due to the substantial reduction of the distortion of the signals due to the winding pad.

1. Management system production of hydrocarbons, placed in the ground and borehole part, using the return wire common circuit, comprising a housing of a centrifugal pump, ESP, lifting pillar and ground conductors on the surface containing the control station centrifugal pump connected to the power transformer, the output of which power circuits submersible is Abel connected through the node of the current lead with submersible motor, the downhole control unit connected to the power supply output, and the output of the downhole control unit connected to the first input of the amplifier, wherein the second input/output of the power amplifier with the input power source is connected directly through contains a thermal connector to the independent signal circuit formed transit insulated wire laid between the stator pack and the housing of a submersible electric motor connected, on the other hand, via the site of the current input signal with residential submersible cable, which on the surface is connected to the output of remote power source and to the first input/output transceiver unit, the second input/output of which is connected to the first input/output control device ground, the second input/output which is connected to the input/output control stations centrifugal pump, and the third output to the input of the remote power source.

2. The control system according to claim 1, characterized in that the amplifier in the downhole portion and a transceiver unit in the surface part is made to provide half-duplex mode of exchange of information on bi-directional schema.

3. The control system according to claim 1, characterized in that the node is the current lead submersible motor made according to the four-pin diagram.

4. Systems the control according to claim 1, characterized in that the independent signal circuit extended to connect other equipment below ESP by transit this circuit through the downhole portion of the system for measurement and control of actuators that are located in other areas of the downhole space.

5. The control system according to claim 1, characterized in that the control unit borehole contains analog and digital measuring channels connected to the processor, and outputs the analog transducers, pressure and temperature, as well as shaper of the test signal is connected to respective inputs of the analog multiplexer, the output of which is connected to the input of analog-to-digital Converter, the second input/output which is connected to the first input/output processor, the second output of which is connected to the control input of the multiplexer, digital measuring inputs are connected to the vibration sensor and the third input/output connected to the first input/output of the amplifier.

6. The control system according to claim 5, characterized in that it contains additional measuring channels number of measured parameters.



 

Same patents:

FIELD: oil and gas industry.

SUBSTANCE: bore core is selected and examined, induction logging and induced gamma-ray logging or neutron-neutron logging is made and log curves are analysed for the roof of production tier. At that formations with apparent resistivity are identified with values less than 6-8 Ohm/m during induction logging and against values at curves of induced gamma-ray logging or neutron-neutron logging making less 85% and less than values of lower formations. Among these formations it is necessary to select strata without loamy lintels and strata of carbonate oil-filled formations and values of apparent resistivity not less than 15 Ohm/m against data of induction logging. Then sedimentary types for the selected formations is defined and if oil-saturated sandstone is present then conclusion is made about terrigenous origin of these formations. Then values are specified for porosity coefficient, permeability and oil-saturation coefficients and when lower limits for this region are exceeded the indentified formations will be referred to productive formations.

EFFECT: increase of operational efficiency during installation of the bottom-hole complex, improvement of level of detail and authenticity of GIS data for identification of geological rating for rock masses.

1 tbl

FIELD: oil and gas industry.

SUBSTANCE: down-hole testing and measuring complex includes earth control station with telemetric data system connected by a logging cable with submerged-type electric pump at the end of tubing string, system of measuring modules including sensors for recording of parameters (yield, pressure, temperature, moisture content) and driving machine for their delivery to horizontal section of a well connected by a logging cable that provides rigid mounting for the system of measuring modules and transfer of data to the control station. Logging cables of the system of measuring modules telemetric system unit are connected by cable connectors. Driving machine contains two walking modules connected electrically and further driven by electrical micro-drives and sequential movement of wedged supports. Installation of the down-hole testing and measuring complex is performed in two stages. At first system of measuring modules is lowered to a well by means of winch with survey cable connected by a cable connector with a logging cable of the system of measuring modules passing through a groove in the wall of an installation pipe mounted at the well surface at the end of tubing string and by the other butt end - to the deadman in which tube there is a movable logging cable. The system of measuring modules is lowered at first up to driving machine turning to a relatively horizontal section, then by means of the driving machine it is hold to the relatively horizontal section until cable connector seats in the deadman tube; the latter is lowered by means of the installation pipe to the preset depth and fixed on the well bore. Thereafter power supply is switched odd in the micro-drive, by means of the winch socket with the survey cable is disconnected from connector pin and the installation pipe is lifted to the surface. At the second stage submerged-type electric pump is lowered to the well with logging cable and socket of cable connector contact pair filled by liquid sealant which is by means of a centring skid connected to the logging cable for the system of measuring modules.

EFFECT: increase of operational efficiency during installation of the bottom-hole complex.

6 cl, 5 dwg

FIELD: oil and gas industry.

SUBSTANCE: down-hole testing and measuring complex includes earth control station with telemetric data system connected by a logging cable with submerged-type electric pump at the end of tubing string, system of measuring modules including sensors for recording of parameters (yield, pressure, temperature, moisture content) and driving machine for their delivery to horizontal section of a well connected by a logging cable that provides rigid mounting for the system of measuring modules and transfer of data to the control station. Logging cables of the system of measuring modules telemetric system unit are connected by cable connectors. Driving machine contains two walking modules connected electrically and further driven by electrical micro-drives and sequential movement of wedged supports. Installation of the down-hole testing and measuring complex is performed in two stages. At first system of measuring modules is lowered to a well by means of winch with survey cable connected by a cable connector with a logging cable of the system of measuring modules passing through a groove in the wall of an installation pipe mounted at the well surface at the end of tubing string and by the other butt end - to the deadman in which tube there is a movable logging cable. The system of measuring modules is lowered at first up to driving machine turning to a relatively horizontal section, then by means of the driving machine it is hold to the relatively horizontal section until cable connector seats in the deadman tube; the latter is lowered by means of the installation pipe to the preset depth and fixed on the well bore. Thereafter power supply is switched odd in the micro-drive, by means of the winch socket with the survey cable is disconnected from connector pin and the installation pipe is lifted to the surface. At the second stage submerged-type electric pump is lowered to the well with logging cable and socket of cable connector contact pair filled by liquid sealant which is by means of a centring skid connected to the logging cable for the system of measuring modules.

EFFECT: increase of operational efficiency during installation of the bottom-hole complex.

6 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: method involves drilling of a well accompanied by mud logging. At that in drilling process total content of hydrocarbon gas and luminescent properties of capillary extraction are determined. Moreover if total content of hydrocarbon gas is 2% and more and luminescent properties of capillary extraction are equal to 2 points and more the penetrated stratum is subject to further surveys. Packed-hole assembly is pulled out from the well, flow string with packer is lowered and the packer is located over the penetrated stratum; circulation of flush liquid is arranged, tubular annulus is filled with a tracing fluid, the packer is inserted into the borehole over the penetrated stratum. The flow string is swabbed with the rate of 10-17 m/min till intake of reservoir fluid is obtained. In swabbing process samples of liquid are taken to check oil presence. When oil is received from the stratum its daily production rate is determined by build-up method from the maximum reduction value for the level, but not less than 3 MPa of bottomhole pressure. Conclusion on productivity of the penetrated stratum is made provided that oil flow rate is 2 m3/day and more. Drilling of the well is continued.

EFFECT: increase of reliability and operational efficiency, determination of productivity in the process of well drilling.

FIELD: oil and gas industry.

SUBSTANCE: method involves three stages: acquisition and processing of borehole data, sending and transfer of signals, and acquisition of data on the surface. Into a drilling string there can be installed a relay system for recovery of signals. By means of a connecting element between a piezoelectric converter and a drilling pipe and by means of transfer ability of wave of stresses of the drilling string, by detection there automatically chosen is an optimum frequency and used for transfer of signals to the surface through the drilling string. In order to transfer signals, detection of a chaos generator is used, as well as in order to solve a Duffing equation, Runge-Kutta method of the fourth order is used to determine availability of a signal as per the value of the system period, and then, a useful signal is picked up. The system comprises a system for the well data receiving and sending, and a system for data acquisition on surface, as well as it can include a relay system. Signals can be transferred in two directions.

EFFECT: invention can be widely used at drilling using liquid or gaseous fluids; its advantage comprises high data transfer and detection rate.

8 cl, 2 dwg

FIELD: oil and gas industry.

SUBSTANCE: method involves thermometry and gamma logging of a well with recording of a background value of natural radioactivity of rocks and background distribution of temperature along the well shaft, a disturbing action, repeated telemetry and gamma logging with recording of values and data of a flow meter, and comparison of data. Thermometry and gamma logging is performed via inter-tube space of the well; the disturbing action is taken by reduction of liquid level in the well by pumping of inert gas to the inter-tube space at the pressure not exceeding maximum allowable pressure on a production string, with displacement of liquid to a tubing string through valves of a rod well pump and then to a discharge line by excess pressure bleeding-off to atmospheric pressure. At repeated performance of thermometry and gamma logging, a geophysical instrument is lifted by 50-100 m higher than the roof of upper perforation interval at the speed of 180-200 m/h with simultaneous recording of a liquid flow rate with a borehole thermoconductive flow meter, intensity of gamma emission of rocks and temperature; after the above instrument passes the distance of 50-100 m above the roof of upper perforation interval, recording is performed only with a thermometer at the speed of 400-600 m/h; when temperature anomalies are found out, which differ from temperature values at test recording via the well shaft, the data of intervals is specified and detailed by performing complex recording using the borehole thermoconductive flow meter and a mechanical flow meter at the speed of 180-200 m/h with measurement of 30-40 points at the investigated interval; after recording via the whole well shaft is completed, repeated lowering of the instrument, repeated temperature recording is performed; complex recording is performed using the borehole thermoconductive flow meter and the mechanical flow meter with measurement of 30-40 points; after the borehole working face is reached, the geophysical instrument is lifted, during which the same records are taken with a thermometer, the borehole thermoconductive flow meter and the mechanical flow meter as at the repeated lowering operation.

EFFECT: surveying of a production well with a lowered non-operating bottom-hole pump.

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: load is measured in the well location during the well operation; at that, load measurement involves load measurement by means of a subassembly attached to layout of the drilling string bottom. Load data is transferred to surface in real time mode by means of telemetry; load data is evaluated with a control device located on the surface; and corrective action in the well, which is based on the load data, is taken.

EFFECT: improving reliability and quality of analysis of measured load.

18 cl, 10 dwg

FIELD: oil and gas industry.

SUBSTANCE: stimulation method of formation fluid influx from the well consists in lowering to the well of a tubing string. Counter pressure on the productive formation is decreased owing to replacing the liquid column with liquid-gas mixture (LGM) at observance of the required value of depression on the productive formation. Before the tubing string is lowered, its lower end is equipped with a remote subsurface pressure gauge and a filter. The tubing string is lowered to the well so that the filter is located opposite the formation perforation interval; after that, treatment of the bottom-hole zone of the formation is performed using a chemical method with process exposure for reaction. Then, the tubing string is lowered further so that the filter is located below the formation bottom, and into the inter-string space there lowered is a string of flexible tubes (FT) 100 m below the liquid level in the well. The liquid column is replaced in the inter-string space of the well with LGW and lowering of the FT string is continued. When lower end of the filter of the tubing string is reached, lowering of the FT string is stopped; then, stimulation of the formation fluid influx is started by gradual reduction of density of pumped LGM till the required depression on the productive formation, which is controlled as per readings of the remote subsurface pressure gauge, is achieved. After completion of stimulation of the influx from the well there removed is FT string from the inter-string space of the well, and operating equipment is lowered to the well and the well is put into operation.

EFFECT: improving efficiency and quality of stimulation of formation fluid influx from productive formation.

2 dwg

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

FIELD: oil and gas extractive industry.

SUBSTANCE: device has body placed in body of stream pump and has locking valve and axial channel for logging cable with fixed logging device. Device also has discharge valve. Device body has ports in middle portion, which connect middle hollow portion of device to displacement chamber for stream pump. In upper and lower portions of body of device upper and lower compactors are placed, limited by support elements on each side of the latter, respectively. Locking valve is mounted in lower portion of device and mated with inner space of tubing string and logging device. Axial channels of valves are eccentric and parallel to first channel of device, while discharge valve is provided with rod with its end prominent relatively to body of device.

EFFECT: broader functional capabilities, higher reliability.

4 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: method includes selection of cable of required rigidity and fixing devices on it. Transporting of devices into well is performed under effect from weight of cable and devices. Cable also contains inner hermetic pipe, which is plugged on both sides prior to lowering cable into well. Liquid is pumped into pipe under pressure through locking valve in upper plug and is kept in pipe under constant pressure during operation. After that cable is lowered with devices fixed to it. Value of pressure of liquid in pipe is determined from formula Ppipe≥ Pwell(Scable/Spipe-1)-QcablexLcable/Spipe<Ptear, where Ppipe - pressure of fluid in pipe, kg-wt/sm2; Scable - cross-section of cable with pipe, sm2; Pwell - hydrostatic pressure of well liquid column at depth of planned delivery of devices on cable, kg-wt/sm2; Spipe - cross-section area of pipe aperture and plug area equal to it in contact with liquid in pipe, sm; Qcable - weight of 1 km of cable with pipe, kg-wt; Lcable - length of cable to depth of planned delivery of devices, km; Ptear - pressure of liquid in pipe leading to tear of cable, kg-wt/sm2, determined from formula: Ptear=Ftear/Spipe, where Ftear - tear force for cable according to documentation, kg-wt.

EFFECT: higher efficiency.

3 cl, 1 dwg, 1 tbl

Profile meter // 2244120

FIELD: geophysics.

SUBSTANCE: device has body, spring-loaded levers jointly connected to it, levers position indicator, made in form of constant magnet mounted at joint connection end of each measuring lever, and signal converter, mounted in body in protective chamber. Constant magnet is made in form of washer and is mounted in circular groove on rotation axis of each lever, and as signal converter magnetic-resistive sensor is used in form of resistive bridge circuit sensitive to direction of magnetic field and non-sensitive to its intensity, while magnetic axis of constant magnet is in plane of washer and is directed perpendicularly to sensitivity axis of magnetic-resistive sensor.

EFFECT: higher precision, simplified construction, lesser dimensions.

3 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: device has body with ports in lower and upper ends, main sensitive elements in form of turbines and packing elements, placed in pairs at body ends, side port made in body between main sensitive elements and converter, connected to surface equipment. In side pipe, mounted inside the body between main sensitive elements, additional sensitive element is placed in form of turbine and thermal sensor. Lower end of side pipe is connected to side port. Diameter of turbine of additional sensitive element is less than diameter of turbines of main sensitive elements. Converter is a control block mounted above body including sleeves locator and electronic microprocessor device.

EFFECT: higher precision.

1 dwg

FIELD: oil and gas production.

SUBSTANCE: invention relates to gas-liquid systems coming from oil production wells. Mixture is separated into liquid and gas in separator. Liquid is periodically accumulated in separator container and then displaced with gas. During this operation, differential pressure for liquid reaching its lower and upper recorded levels and time required for filling recorded volumes are measured as well as absolute pressure and temperature of gas in container. Liquid flow value expressed in weight is calculated using special mathematical dependence. At oil field, liquid and gas enter separator from preliminary gas intake installation or from the first separation step.

EFFECT: increased accuracy of measurement due to avoided gas density registration and excluded necessity of using strictly cylindrically-shaped measuring container.

1 dwg

FIELD: engineering investigations in building, particularly devices for determining deformation and strength properties of ground in well.

SUBSTANCE: device comprises probe (working tip), control-rod, pipeline, communication line, loading jig and measuring station. Probe includes hollow cylindrical body with bottom and cap filled with working liquid, elastic shell sealed from body bottom and top. Formed in non-fixed elastic shell area are perforations. Piston with rod is installed in upper part of hollow body above working liquid. Rod passes through cap in sealed manner. Rod is connected with control rod so that piston may move in axial direction. Formed above piston is cavity connected to pipeline. Hollow body has bottom in which air-tight plug is installed. Measuring device is made as linear piston displacement transducer. Through orifices are formed in hollow body wall near body bottom. Arranged from body outside are vertical or inclined grooves aligned with through orifices by lower ends thereof. Air-tight plug is provided with adjustable rest for restricting piston stroke.

EFFECT: simplified structure of probe and measuring devices, increased operational reliability and improved validity of obtained data.

2 cl, 1 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: method includes performing a test pumping of liquid waste into absorbing well before operational pumping, while changing flow step-by-step. From equation of absorption base hydrodynamic parameters are determined for calculation of predicted coefficients of operation characteristics of absorbing well and reserve well. During operational pumping of liquid waste together with thermometry along absorbing well shaft, registration of actual pressures and flow on pump devices, actual pressures on mouth in tubing pipes of absorbing well, actual pressures on face are additionally registered in absorbing well as well as pressures on mouth in behind-pipe space, actual loss at mouth in behind-pipe space, actual loss of waste on mouth, actual positions of face well, upper and lower limits of absorption range from well mouth. In reserve well actual pressures on face are registered, as well as actual positions of liquid level from reserve well mouth, upper and lower limits of absorption range. Prediction coefficients are compared for operation characteristics of absorbing well and reserve well to actual coefficients. 9 conditions of hydrodynamic bed conditions at reserve well and absorbing well are considered during pumping of waste. Specific actions of operator on each condition are described.

EFFECT: higher reliability and trustworthiness.

1 ex

FIELD: geophysics.

SUBSTANCE: method includes lowering protective container to the well to portion of intensive curvature of shaft, which container is fixed at end of drilling pipes, lowering of geophysical device into protective container on lower portion of logging cable, delivery of protective container with geophysical device to pit-face by consecutive extending of drilling pipes column, lowering of upper portion of logging cable through remote-controlled compactor of logging cable fixed on branch of swivel, into drilling pipes, until electric contact to free end of lower portion of logging cable via detachable connecting sleeve, geophysical examining of shaft during raising of geophysical device together with drilling pipes with appropriate connection-disconnection of fixing ends of lower and upper portions of logging cable when screwing away each following drill stand. When examining wells having extensive steeply slanted portion of well shaft with zenith angle of 50°-90°, where lowering of upper portion of logging cable to electrical contact with free end of lower portion of logging cable via detachable connecting sleeve under its own weight is difficult due to friction at drilling column wall, forced lowering of detachable connecting sleeve is performed by feeding washing liquid under pressure into drilling pipes and concurrent adjustment of pressure in chamber of remote-controlled compactor of logging cable. Pressure in chamber of remote-controlled logging cable compactor is achieved to be close to pressure of washing liquid in drilling pipes, to provide for optimal speed of cable lowering and its pressurization, and after connection of detachable connecting sleeve to lower portion of logging cable during raising and lowering of drilling pipes, examinations of well are performed.

EFFECT: higher efficiency.

1 dwg

FIELD: oil extractive industry.

SUBSTANCE: mixture is separated on liquid and gas in separator. Liquid is periodically collected and forced away by gas while measuring absolute pressure and gas temperature in separator tank near upper and lower fixed liquid levels, and times of forcing away of fixed liquid volume. Additionally measured are absolute pressure and temperature in moment when liquid reaches intermediate fixed level. Then liquid is forced from intermediate fixed level to lower fixed level separator is switched off from well, and mass loss of gas is calculated from provided relation. Device for realization of method consists of separator with feeding pipe, in which a three-drive valve is mounted, and draining pipe, which through said valve is connected to liquid outlet channel and to gas outlet channel. Separator is provided with sensors of temperature and pressure and sensors of upper, intermediate and lower levels, mounted in such a manner, that they separate fixed volumes between each other in separator tank, in case of equality of which calculations are simplified.

EFFECT: higher precision.

2 cl, 1 dwg

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