Oil well (variants), method of oil well operation, downhole device supply system and method

FIELD: oil industry, particularly to supply and store power necessary for downhole device and appliance operation in oil well.

SUBSTANCE: power supply system has current impedance device arranged around borehole pipeline structure and adapted for at least partial defining supply part to transfer alternate current through and along conductive pipeline structure part. System also has power storing device adapted to be electrically connected to conductive pipeline structure part, to be discharged with alternate current and to be linked with downhole device so supply power thereto. Embodiments of oil well structure including above system are also disclosed, as well as oil well operation method and power supply method with the use of the described system.

EFFECT: improved stability of power supply to downhole devices and appliances.

37 cl, 8 dwg

 

The present invention relates to an oil well and work well and the system and method to provide power downhole device.

Numerous applications of the present applicant describe how the supply of electric energy and communication equipment installed at the depth of the oil or gas wells. In these methods, the operational tubing column is used as the supply chain and casing as the return circuit for the transmission schemes of power and communication or, alternatively, as a schema of the transmission casing and/or tubing column are used as supply chain, and the formation as "earth". In any case, the electrical losses that will be present in the transfer scheme will drastically change depending on the specific conditions for a particular borehole. These losses cannot be neglected when designing downhole power and communication, and in extreme situations, the methods used to reconcile loss may be the main determining factors of the project.

When the power is supplied using operational tubing of the column as a feed conductor and the casing string as the return path of the current composition of the fluids present in the ring, and especially the potential p is OUTSTA components of salt water in the composition (that is, electrically conductive fluid), provide electrical connection between the tubing string and the casing string. If this connection has a high conductivity, the power will be lost in case of short circuit between the tubing string and casing before reaching the downhole device.

When power is applied using the casing as a conductor and ground layer as a reverse path of the current leakage of the electric current through the cement or concrete end (between the casing and the earth formation) in an earth formation may be a mechanism of loss. The higher the conductivity of the cement and earthen formation, the greater the loss of electric current, as the current passes from the surface through the casing in position in the well (for example, the location of the productive formation at great depth).

Therefore, for the successful application of systems and methods for supplying power and/or communication to the depth in the hole, you'll often need a means to ensure alignment of energy loss when the loss of power becomes significant.

The technical result of the present invention is to eliminate the disadvantages of known solutions and the needs noted above.

In accordance with the invention system set up to supply power to the well is a great device, contains the device impedance current, concentrically located around the piping structure of the well for at least partial formation of the conductive parts for the transmission of electric current changing over time, through and along the conductive portion of the piping structure, and the energy-storage device, adapted for electrical connection to a conductive portion of the piping structure to overcharge with electric current, time-varying, and for connection to the downhole device to supply power to the downhole device.

During the flow of electric current changing over time, through and along portions of the pipeline structure there is a potential difference between one side of the device impedance current and the other side of the device impedance to electric current.

The energy-storage device may contain secondary chemical current source or a battery or a capacitor.

Device impedance current may be induction choke, unconnected to the power supply containing ferromagnetic material and providing a complete resistance to an electric current varying in time, in the wall of the pipeline structure, depending on the size, the geometry and magnetic properties of induction choke and its location relative to the pipeline structure.

Pipeline structure can contain at least a portion of the operating pump and compressor casing or at least part of the casing of the well.

The system may further comprise a control scheme of the power supply, adapted to switch between a charging configuration of the electric circuit and the bit configuration of the electric circuit device for energy storage.

The system may further comprise logic adapted to automatically control the control scheme of power.

According to the invention created an oil well containing a pipeline structure having a conductive portion and passing between the surface and the location of the well, the power source located on the surface and electrically connected to the conductive portion of the piping structure and adapted to output current, time-varying, the device impedance, set around a pipeline structure for at least partial formation of the conductive portion of the piping structure, the downhole module energy storage, containing the energy-storage device and associated with the conductive part of the pipeline structure, and the device with power supply, located in wells is ine and electrically connected to the module energy storage.

The device with power supply may include a sensor or Converter or valve with electric control or the motor or the modem or the discharge of chemicals.

Pipeline structure can contain at least a portion of the operating pump and compressor casing, and the circuit of the reverse current may contain at least part of the casing of the well.

Pipeline structure can contain at least part of the casing of the well.

The circuit of the reverse current may be a chain of reverse current through the earth.

Oil well may further comprise a control scheme of the power supply, adapted to switch between a charging configuration of the electric circuit and the bit configuration of the electric circuit module for energy storage.

Oil well may further comprise logic adapted to automatically control the control scheme of power.

The energy-storage device may contain secondary chemical current source or a battery or a capacitor.

According to the invention also created an oil well containing a casing, passing in the wellbore, operating the booster column, passing in the casing, a source of Pete the Oia, located on the surface, electrically connected and adapted to supply an electric current varying in time, at least, tubing column or casing, downhole module energy storage, electrically connected to at least the tubing string or casing, downhole device with power supply, electrically connected to the storage module the energy downhole induction choke located around a portion of at least one of the tubing of the column and the casing, and adapted to channel a portion of the electric current in the energy-storage device.

Induction choke can be detached from the power supply and to contain ferromagnetic material.

Module energy storage can contain secondary chemical current source.

Module energy storage may contain a battery or a capacitor.

Oil well may further comprise a control scheme of the power supply, adapted to switch between a charging configuration of the electric circuit and the bit configuration of the electric circuit module for energy storage.

Oil well may further comprise logic adapted for automatic control scheme to regulate the Finance power.

According to the invention, the method of operation of oil well contains the following steps: providing conductivity pipeline structure in the wellbore at least partially through the device impedance current; the power is in the conductive portion of the piping structure, and a power source adapted to output current varying in time; saving electrical energy downhole module energy storage; charging module energy storage using current, time-varying, during the extraction of oil from the well; a discharge device storing energy as it is necessary to supply the device with power supply, located in the well during the production of petroleum products from well.

The way you can use the module storing energy, comprising the device with power supply, containing the sensor and the modem, and which further comprises the steps of detecting the values of the physical quantities in the well with the help of sensor and data about the physical variable in the surface of the device with a modem and via pipeline structure.

Data transmission on the physical size can be performed in the absence of a charging device storing energy from the power source.

The way you can use the module energy storage, including the surrounding many energy storage devices, and which contains the stages parallel charging of energy storage devices and sequential discharge of the energy storage devices.

According to the invention a method of downhole power unit contains the following steps: providing a downhole module energy storage, containing the first group of electrical switches, a second group of electrical switches, two or more energy storage devices and the logical circuit; when the coil is energized in the module energy storage circuit of the first group of switches and opening the second group of switches to form a parallel circuit at the ends of the energy storage devices and charging the energy storage devices; during charge, upon termination of current flow, submitted to the module energy storage, and in the presence of energy storage devices voltage level smaller than the first predetermined voltage level the opening of the first group of switches and closing the second group of switches to form a serial circuit at the ends of the energy storage devices and the discharge of these devices as necessary to power the downhole device; during charging, if the energy storage devices of the voltage level greater than the first predetermined voltage level, the enable logic circuit; when the logical scheme is s expectation of the current supplied in a storage module the energy to stop the current flow; upon termination of current flow implementation time-delay for a specified time interval; when the resumption of current flow prior to the expiration of the specified time interval, the sequel to charge energy storage devices; when after a predetermined interval of time, the opening of the first group of switches and closing the second group of switches for the formation of sequential circuits at the ends of the energy storage devices; discharge of the energy storage devices as needed to power the downhole device, when the resumption of current flow circuit of the first group of switches and opening the second group of switches for the formation of a parallel circuit at the ends of the storage devices energy charge the energy storage devices; low voltage energy storage devices below the second predetermined voltage level off logic.

The method may further comprise the step of transmitting data from downhole devices to the surface modem in excess of a predetermined time interval time delay, the absence of the current module energy storage and exceeding the voltage level of the storage devices of the second specified voltage level.

Thus, the problem is, noted above, largely solved by means of the method described above to power the downhole device, replenish this energy as needed, and effective distribution of this energy using a logical algorithm or due to the configuration management ways to power distribution.

The storage mechanism of energy storage devices may be chemical, as in batteries, or electric, as in capacitors, ultracondensed or supercapacitors. When the control cycle of charge-discharge of the battery, even very limited power in the borehole can be used for charging batteries and for excitation of electrical or electronic equipment can be supplied with a much higher rate than the rate of charge. Typical electrical equipment may include, but not be limited to, motors, actuators, dampers and valves and/or acoustic sources. They usually require high power during use, but often work only intermittently on command.

By the nature of the functions performed downhole device is placed groups. Relative to their distance from the surface interval between downhole devices within the group is small. This proximity allows peredavat the power and/or communication signals from one downhole device to another using tubing of the column and/or casing in the path of energy transfer and/or communication signals between the individual downhole devices. This method of power distribution depends on the conditions of transfer of control communications signal to select the configuration of the connection between the energy storage devices in each device and loads that may be in another device. When using this method, the power coming from more than one device in the group, you can submit at one point, providing higher power consumption at this point use, than if each device receives power only from its own local storage devices energy.

Similarly, in the case where the energy-storage device within a single downhole device fails, the power module may be supplied from neighboring devices, and these devices store energy can be excluded from the service. An important characteristic of the energy storage devices (such as chemical current sources and capacitors) is that their individual work capacity may be limited to values that are lower than those required for operation of electronics or electrical equipment. In cases where the downhole power is strictly limited by the losses in the chain of transmission, the input power may be limited to values below those that ru is whether electric circuits to operate normally. Therefore, among other problems, the present invention provides a solution to this problem.

Other objectives and advantages of the present invention in the following detailed description with reference to the accompanying drawings, which depict the following:

figure 1 depicts a diagram of an oil well according to a preferred variant implementation of the present invention;

figure 2 depicts a simplified wiring diagram of the electric circuit formed by using the well shown in figure 1;

figa schematically depicts the upper part of the oil wells according to another preferred variant implementation of the present invention;

figv schematically depicts the upper part of the oil wells according to another preferred variant implementation of the present invention;

figure 4 depicts an enlarged view in section of the bottom hole are shown in figure 1;

figure 5 depicts a simplified electrical circuit for downhole device shown in figures 1 and 4, illustrating the module energy storage;

6 depicts a diagram illustrating input and output signals to logic circuits;

7 depicts a state diagram illustrating the logic used by the downhole device shown in figures 1, 4 and 5.

Below bring the camping description of the preferred alternative implementation of the present invention with reference to the drawings, on which the same position indicate the same elements in all different types, and description of other possible embodiments of the present invention. Presented figures are not necessarily made to scale, and in some cases the drawings are enlarged and/or simplified in certain spaces for the convenience of the image. Specialists can assess the many possible applications and modifications of the present invention based on the examples of possible embodiments of the present invention, as well as on the basis of the embodiments shown and discussed in the related applications, which are incorporated herein by reference to the maximum extent permitted by law.

The term "pipeline structure"used in this application, may be a single pipe, tubing column casing borehole, pump rod, a series of interconnected tubes, rods, metal truss, grid through a farm, support, idler or lateral extension drill hole, a network of interconnected pipes or other similar structures known in the art. In a preferred embodiment, the invention is used in the context of oil wells where the pipeline structure comprises a tubular, metal, e is antropofago pipe or tubing column, but the invention is not limited to this. For the present invention, at least part of the pipeline structure must be electrically conductive, such conductive part can be a overall pipeline structure (for example, steel pipes, copper pipes) or stretching in the longitudinal direction of the conductive part, combined with stretching in the longitudinal direction of the electroconductive part. In other words, the conductive piping structure is a structure that provides a current path from the first part, where the power source is electrically connected to the second part, and the device and/or circuit reverse current are electrically connected. The pipeline structure is usually a well-known round metal tubing column, but the geometry of the cross-section of the pipeline structure or any part thereof may vary in shape (e.g. round, rectangular, square, oval) and the size (e.g. length, diameter, wall thickness) along any part of the pipeline structure. Therefore, the pipeline structure must have an electrically conductive portion extending from the first part of the pipeline structure to the second part of the pipeline structure in which the first part is separated from the second part in the ol pipeline structure.

The terms "first" and "second part"as used here, denotes, in General, part, section or area of the pipeline structure, which may take place or not take place along the pipeline structure, which can be located in any selected space along the pipeline structure and which can cover or not to cover the closest ends of the pipeline structure.

The term "modem" is used here, in General, to refer to any communication device for transmitting and/or receiving electrical communication signals through an electrical conductor (e.g. metal). Therefore, the term "modem"that is used here is not limited to the acronym for modulator device, which converts the voice or data signal to a form suitable for transmission)/demodulator device, which restores the original signal, which was modulated Vysokochistye carrier). In addition, the term "modem"that is used here is not restricted to the well-known computer modems, which convert digital signals to analog signals and Vice versa (for example, for the transmission of digital information signals on the analog public switched telephone network of General use). For example, if the sensor outputs measurement data in an analog format, such measurements can is about the only modulate (e.g., using modulation with expansion of the range) and to transmit, and therefore do not need to perform analog-to-digital conversion. As another example, relay/slave modem or communications device only needs to identify, filter, amplify and/or to relay the received signal.

The term "valve"as used here generally refers to any device that performs the function of adjusting the flow of fluid. Examples of valves include, but are not limited to, bellows-type gas-lift valves and controllable gas-lift valves, each of which can be used to regulate the flow of carrier gas in the tubing of the column of drilling wells. Internal valves can greatly differ, and in the present application is not limited to the valves described with any particular configuration as long as the valve acts as a flow control. Some of the various types of flow control include, but are not limited to, the configuration of a ball valve, the configuration of the needle valve, the configuration of the shutoff valve and the configuration of the valve cage. How to install valves discussed in this application can greatly vary.

The term "valve, electrically operated", of which the first is used here, usually refers to the "valve" (as described above), which you can open, close, adjust, alter, or throttle continuously in response to an electrical control signal (e.g. a signal from a computer located on the surface or downhole module electronic controller). The mechanism that actually changes the state of the valve, may include, but are not limited to, electric motor, electric motor, electric solenoid, an electric switch, a hydraulic actuator, managed at least one electric motor, electric motor, electric switch, electric solenoid, or combinations thereof, pneumatic actuator, managed at least one electric motor, electric motor, electric switch, electric solenoid, or combinations thereof, or the device to reject a spring in combination with at least one electric motor, electric motor, electric switch, electric solenoid, or their combinations. "Valve with electric control" can include or not include sensor position feedback for supplying a feedback signal corresponding to the actual valve position.

The term "sensor", which COI the box is used here, refers to any device that detects, identifies, monitors, records, or, in other words, registers the absolute value or change the value of a physical quantity. A sensor as described herein can be used to measure the values of these physical quantities, but is not limited to this, as temperature, pressure, (absolute and differential), the flow velocity, seismic data, acoustic data, pH, salinity levels, valve positions, or almost any other physical data.

The phrase "on the surface", which is used here, refers to a location that is above the depth of about fifty feet in the ground. In other words, the phrase "on the surface" does not necessarily mean the location at ground level, but is used here in a broader sense to indicate the location, which is often easily or conveniently available in the wellhead, working people. For example, the surface may indicate on the table in the workshop, which is located on the ground and on the platform of the drill hole, at the bottom of the ocean or lake, deep platform of an oil rig or on the 100th floor of the building. In addition, the term "surface" can be used here as an adjective to define the location of the item or area is, located "on the surface". For example, the phrase "surface" computer, which is used here, means the computer is located "on the surface".

The term "well"that is used here, refers to the location or position at a depth of about fifty feet below the earth. In other words, the term "well" is widely used here, refers to the location, which is often difficult or inconvenient to reach from the wellhead, working people. For example, in an oil well, the location in the well" is often in or near underground oil operational area, regardless of whether the operational area available vertically, horizontally, sideways, or at any other angle between them. In addition, the term "well" is used here as an adjective "well", which is the location of the item or area. For example, the downhole device in a borehole indicates that the device is "in the hole" as opposed to location "on the surface".

The term "wireless"as used in this application, means the absence of a known, insulated electric wires, for example, passing from downhole devices to the surface. The use of tubing of the column and/or casing Colo the us as a conductor is considered "wireless".

Figure 1 shows a diagram of gas-lift oil wells 20 according to a preferred variant implementation of the present invention. Borehole 20 has a casing 30, held in the wellbore through the reservoir 32 in the operational area (not shown), more distant in the well. Operational tubing column 40 is held in the casing 30 wells for the transfer of fluids (e.g. oil, gas) from the well to the surface during mining operations. Packer 42 is located in the well inside the casing 30 and around the tubing of the column 40. Packer 42 is traditional, and it is hydraulically isolates the portion of the bore 20 above the operational area to provide input gas under pressure into the annular space 44 formed between the casing 30 and the booster casing 40. During gas-lift operation, gas under pressure is injected from the surface into the annular space 44 for further input in the booster casing 40 to provide gas lift for fluids that are in it. Therefore, oil well 20, as shown in figure 1, is similar to the well known design, but given the fact that part of the present invention.

The electrical circuit is formed using the various elements of the well 20 (figure 1). Educated electricity is Skye chain of wells used to supply power and/or communication with the downhole device 50 with power supply. The surface computer system 52 provides power and/or communication on the surface. The surface computer system 52 includes a source 54 of the power supply and the main modem 56, but the elements of the surface equipment and the configuration can be changed. The source 54 of the power supply is adapted to output the current time-varying. Current, time-varying, is preferably alternating current, but it can also be direct current varying in time. The communication signal supplied through the surface computer system 52 preferably is a signal spread spectrum, but as an alternative you could use other types of modulation or predistortion. The first output 61 of the computer, the surface computer system 52 is electrically connected to the tubing string 40 on the surface. The first output 61 of the computer passes through the suspension 64 in an isolated seal 65 and thus electrically isolated from the suspension 64 passing through it in the seal 65. The second output 62 of the computer, the surface computer system 52 is electrically connected to the casing 30 of the borehole to the surface.

Tubing column 40 and casing 30 in the scheme of wells are used as electrical conductors. In a preferred embodiment, the AK is shown in figure 1, tubing column 40 acts as a pipeline structure for transmitting electrical energy and/or communication signals between the surface computer system 52 and the downhole device 50, and the packer 42 and casing 30 function as the circuit of the reverse current. Isolated coupling 68 for tubing included in the wellhead below the suspension 64 to provide electrical insulation tubing of the column 40 from the suspension 64 and the casing 30 on the surface. The first conclusion 61 computer electrically connected to the tubing string below 40 isolated coupling 68 for tubing. Induction choke 70 is located in the hole around the tubing of the column 40. Induction choke 70 is, in total, annular and is, in General, concentrically arranged around the tubing of the column 40. Induction choke 70 contains a ferromagnetic material, and it is not powered. As described more in detail in other applications of this applicant, induction choke 70 generates eddy currents in the wall of the tubing of the column when passing a time varying current along the section of the column, surrounded by a choke. The creation of eddy currents choke 70 creates impedance current in the wall of Econoline, depending on the size (mass), geometry and magnetic properties of this reactor and its location relative to the tubing of the column 40. Isolated coupling 68 for tubing and induction choke 70 operates to prevent the flow of an alternating current signal at the booster column 40. In other embodiments, the implementation of the induction choke 70 may be located around the casing 30. The downhole device 50 has two outputs 71, 72 electrical devices. The first conclusion 71 is electrically connected to the tubing string 40 on the side of the source 81 induction choke 70. The second terminal 72 electrically connected to the tubing string 40 on the side 82 of the return circuit of the induction choke 70. Packer 42 provides electrical connection between pump and compressor casing 40 and the casing 30 in the well. However, the tubing column 40 and casing 30 can be electrically connected in the well using a conductive fluid (not shown) in the annular space 44 above the packer 42 or in any other way. In the annular space 44 above the packer 42 fluid preferably will have little or no conductivity, but in practice it is sometimes impossible to prevent.

In figure 2 the image is on a simplified circuit diagram of an electric circuit, formed in the bore 20 (Fig 1). In the process, power and/or communication signals (filed with the surface computer system 52) served in the tubing column 40 on the surface below the isolated coupling 68 for tubing through the first output 61 of the computer. The passage of current, time-varying, from tubing of the column 40 in the casing 30 (and to the second output 62 of the computer) through the suspension 64 prevent the insulators 69 in an isolated coupling 68 for tubing. However, the current, time-varying flows freely into the well on tubing string 40 to achieve induction choke 70. Induction choke 70 has a large inductance, which prevents leakage greater part of the current (e.g., 90%) in the tubing column 40 in the induction choke 70. Therefore, by induction choke 70 between the pump and compressor casing 40 and the casing 30 there is a potential difference. Other ways of transmission of AC signals on the tubing string is disclosed in the related applications. The potential difference also occurs between the pump and compressor casing 40 on the side 81 source induction choke 70 and tubing column 40 on the side 82 CE and the reverse current of the induction choke 70. As the downhole device 50 is electrically connected to the voltage, the greater part of the current passed in the tubing column 40, which is not lost along the way, through the downhole device 50 and, thus, provides power and/or communication in the downhole device 50. After passing through the downhole device 50, the current returns to the surface computer system 52 through the packer 42, the casing 30 and the second terminal 62 of the computer. When the current is variable, the direction of flow of the above-described current through the borehole 20 will change to the opposite and go through the same path.

Other alternative methods of electrical circuits using a pipeline structure borehole and at least one induction choke is described in the related applications, many of which can be used in conjunction with the present invention to provide power and/or communication signals in the downhole device 50 with power supply and to implement other embodiments of the present invention. It should be noted that the related applications describe methods based on the use of the casing, and not the tubing of the column, to transfer power from the surface to the downhole device, and the present invention is applicable option in the x implementation for transmission through the casing string.

If other packers or centralizers (not shown) is inserted between the isolated coupling 68 for tubing and packer 42, they can be entered into the composition of the electrical insulator to prevent short circuit between the pump and compressor casing 40 and the casing 30. Such electrical isolation with additional packers or centralizers can be achieved in various ways, obvious to a person.

An alternative (or addition) for isolated coupling 68 for tubing may serve as another induction choke 168 (figa), which can be placed around the tubing of the column 40, above the location of the electrical connections to the first output 61 of the computer in the tubing string 40, and/or suspension 64, which may be isolated suspension 268 (pigv)with insulators 269 for electrical insulation tubing of the column 40 of the casing 30.

4 shows an enlarged view in section of the well 20 (figure 1)showing the induction choke 70 and the downhole device 50. For the preferred option implementation, shown in figure 1, the downhole device 50 contains a module 84 communication and control, gas-lift valve 86 with electric control, sensor 88 and m is Dul 90 energy storage. Preferably, all elements of the downhole device 50 together in a single, sealed collector 92 tubing columns as one unit for ease of handling and installation, as well as to protect the items from exposure to the environment. However, in other embodiments, implementation of the present invention the elements of the downhole device 50 can be separately (i.e. not in the manifold 92 tubing columns) or combined in other combinations.

Module 84 communication and control contains individually addressable modem 94, the controller 96 of the engine and the interface 98 of the sensor. Because the modem 94 downhole device 50 is individually addressable, within the same borehole 20 can be installed and used independently of the other more than one downhole device. Module 84 communication and control electrically connected to the module 90 energy storage (not shown in figure 4 connecting wires for receiving power from the module 90 energy storage as needed. The modem 94 is electrically connected to the tubing string 40 through the first and second conclusions 71, 72 device (electrical connections between the modem 94 and conclusions 71, 72 device not shown). Therefore, the modem 94 may communicate with the surface computer system 52 or other is chainname devices (not shown) using tubing of the column 40 and/or the casing 30 as an electrical conductor for a signal.

The gas lift valve 86 with electrical control includes a motor 100, valve 102, the inlet 104 and the outlet nozzle 106. The motor 100 is electrically connected to the module 84 communication and control in the controller 96 of the engine (electrical connections between the engine 100 and the controller 96 of the engine not shown). The valve 102 is mechanically driven by an electric motor 100 in response to control signals from the module 84 communication and control. Such control signals from the module 84 communication and control can come from the surface computer system 52 or other downhole device (not shown) via modem 94. Alternatively, the control signal to control the motor 100 can be develop within the downhole device 50 (for example, in response to the measurement results of the sensor 88). Therefore, the valve 102 can be continuously controlled, open, close, or throttle module 84 communication and control and/or the surface computer system 52. Preferably, the motor 100 was the stepping motor for adjusting the valve 102 with the known increments. If the annular space 44 gas under pressure can be pumped in a controlled manner in the inner part 108 tubing columns 40 through klapa is and 86 with electric control (through the inlet 104, the valve 102 and the outlet nozzle 106) for generating bubbles 110 of the gas inside the flow of fluid to lift fluid to the surface during mining operations.

The sensor 88 is electrically connected to the module 84 communication and control interface 98 of the sensor. The sensor 88 may be a sensor or transducer of any type adapted for detecting or measuring the values of physical quantities within the borehole 20, including (but not limiting) the pressure, temperature, acoustic waveforms, chemical composition, concentration of chemical elements, material availability indicator or flow rate. In other embodiments, the implementation can use multiple sensors. In addition, you may change the placement of the sensor 88. For example, in the General case, you can use additional or alternative sensor adapted to measure pressure within the ring 44.

As shown in figure 4, the module 90 energy storage device contains 112 energy storage circuit 114 regulation of power supply, logic 116 and circuit 118 time delay, each of which are electrically connected together to form the module 90 energy storage (figure 4 electrical connections not shown). Module 90 energy storage electrically connected to the tubing string 40 to the voltage occurring at the end of the induction choke 70, as explained above. Module 90 energy storage is also electrically connected to the module 84 communication and control (electrical connections not shown in figure 4) for the submission to him of power, when power is not available from the surface computer system 52 through the tubing of the column 40 and/or the casing 30. Module 90 energy storage module 84 communication and control can also connect wires with the possibility of switching to module 84 communication and control (and, therefore, the modem 94, the motor 100 and the sensor 88) always has been powered only by using devices 112 energy storage, and storage of energy periodically recharged using source 54 power from the surface through the tubing of the column 40 and/or the casing 30.

In the preferred embodiment, shown in figure 4, the device 112 energy storage capacitors are. In an alternative embodiment, devices 112 energy storage can be rechargeable devices, energy storage, adapted to store and discharge electrical energy as needed.

Processing logic 116 power is supplied preferably using pins 71, 72 device connecting an electric power supply for logic circuit not shown), instead of using devices 112 storing energy is. Food processing logic 116 using pins 71, 72 of the device can be submitted from other downhole devices (not shown) or from a surface source 54 nutrition and across the bridge 136 for supplying DC to logic. Thus, the logic circuit 116 is used to replace the switches 121, 122, 131, 132 in the circuit 114 regulation of power when device 112 energy storage is not charged. In an alternative embodiment, logic circuit 116 may also receive power from the device 112 energy storage using pins 71, 72 of the device, if available, or logic circuitry 116 may contain its own rechargeable battery, taking into account the change of the switches 121, 122, 131, 132 in the circuit 114 regulation of power when device 112 energy storage is not charged and when there is no power supplied via the conclusions 71, 72 of the device. In addition, processing logic 116 can be powered only by using one or more devices 112 energy storage.

Figure 5 shows a simplified circuit diagram for the downhole device 50 (figures 1 and 4) with a specific emphasis on the module 90 energy storage. Scheme 114 regulation of the power module 90 energy storage contains the first group of switches 121, a second group of switches 122, the first switch 131 of the load, the second switch 132 load is, the Zener diode 134 and a full-wave circuit 136 rectifier. Scheme 114 regulation power supply adapted to provide a parallel circuit configuration at the ends of the devices 112 storing energy for charging and serial configuration circuit at the ends of the devices 112 storing energy for discharge.

In the process circuit 114 regulation of power supply, shown in figure 5, takes into account many possible configurations of the circuits. When the first switch 121 is closed and the second switch 122 is open, parallel configuration circuit is formed on the ends of the devices 112 store the energy, and therefore, the voltage level at the ends of all of the devices 112 energy storage is the same, and together they can work with higher Ampacity. When the first switch 121 is open and the second switch 122 is closed, the serial configuration circuit is formed on the ends of the devices 112 store the energy, and therefore, the voltage levels of the devices 112 energy storage are summed together to form a large total voltage in the circuit 114.

In addition, the circuit 114 regulation of power supply, shown in figure 5, takes into account many possible configurations of the circuits to supply power to the module 84 communication and control, electrically connected to it. When you need power for m the module 84 communication and control or when it is supplied to the module 84 communication and control, the first switch 131 of the load is shorted, but other switches may vary. Since the power supply module 84 communication and control can be managed by using the first switch 131 load, the charges in the devices 112 storage energy can be stored when the module 84 communication and control is not needed, and the use of the module 84 communication and control can be controlled (i.e. to enable or disable the module 84 communication and control). The second switch 132 of the load is made for separation circuit 114 regulation supply chain borehole. For example, if the power to the module 84 communication and control must be submitted only using the devices 112 energy storage, the second switch 132 of the load circuit is open. Thus, when the switch is closed first switch 131 of the load, open the second switch 132 loads, open the first group 121 switches and a closed second group 122 of the switches formed by the series circuit provides the voltage level for the module 84 communication and control, equal to the sum of the voltage levels of the devices 112 energy storage. When the switch is closed first switch 131 of the load, open the second switch 132 load, closed the first group 121 switches and open the second group 122 of the switches formed by the parallel circuit to provide the characteristic voltage level for a module 84 communication and control, equal to the voltage level of each device 112 energy storage, which is lower than in a serial configuration. However, the parallel configuration provides a low voltage at a higher duration or current load module 84 communication and control than a serial configuration. Therefore, the preferred configuration of the circuit (parallel or serial) to power the device will depend on the power consumption of the device.

The power module 84 communication and control may also be provided from the circuit borehole (using the first and second conclusions 71, 72 device) by closing the first switch 131 of the load circuit of the second switch 132 load and disconnection of the first and second groups 121, 122 switches. In addition, this configuration for the circuit 114 regulation of supply may be required when the communication signals are received in or from the module 84 communication and control. The Zener diode 134 provides surge protection, but can also provide other types of protection devices against overvoltage and/or overcurrent. Power and/or communication signals, filed on the first and second conclusions 71, 72 of the device through the tubing of the column 40 and/or the casing 30)can be submitted using the surface source 54 power, the other is wow downhole device (not shown) and/or other downhole module energy storage (not shown). In addition, the power module 84 communication and control can be submitted through the chain of borehole and device 112 storing energy by closing the first switch 131 of the load circuit of the second switch 132 of the load and the circuit of the first or second group 121, 122 switches.

For charging devices 112 energy storage by using the chain borehole second switch 132 load closes and connects the circuit 114 regulation of power to the circuit borehole through the bridge 136. The charge device 112 energy storage should preferably be in a parallel circuit configuration at the ends of the devices 112 energy storage (i.e. closed the first group 121 switches and open the second group 122 switches) and open load module 84 communication and control (open the first switch 131 load), but the devices 112 energy storage can also recharge (less than effective) when the power supply to the module 84 communication and control. Thus, during the operation of the charge in the preferred embodiment shown in figures 1, 4, 5, alternating current is supplied from source 54 supply chain borehole to the surface and directed through the first and second conclusions 71, 72 device using induction choke 70. AC power is supplied through a resistor 138 to negotiate full resistance is ellenia, and AC voltage is rectified using a bridge 136 for receiving the DC voltage at the ends of the devices 112 energy storage, which charges the device 112 energy storage.

When switching between configurations of charge and discharge, or change configurations of switches possible automated process with internal management within the downhole device 50, can be controlled by an external means of control signals coming from the surface computer system 52 or other downhole device or the downhole controller (not shown), or a combination of these ways. As external commands can't do or act up until on the downhole device 50 is not energized, it is desirable to enter into the scheme of automatic control, which detects the discharged state devices 112 energy storage, detects the presence of AC power from a surface source 52 supply through tubing column 40 and/or the casing 30 and, if both conditions are automatically recharges device 112 of energy storage. So switching in a preferred embodiment, (1, 4, 5) is an automated process, automatically controlled by logic circuit 116.

As CSP is shown in figure 5, 6, logic circuit 116 receives two input signal 141, 142, which control the four output signals 151, 152, 153, 154 of the logic circuit 116. One of the input signals 141 corresponds filed if an alternating current at the pin edges 71, 72 of the device (for example, from a surface source 54 power). The input signal 141 produces a half wave rectifier 156 and capacitor 158, which are used together to detect the presence of AC pin edges 71, 72 of the device. The other input signal 142 carries information about the voltage level at the ends of the devices 112 energy storage, which is indicative of the level of charge remaining in the devices 112 energy storage. The first output signal 151 of the logic circuit 116 is a command for opening or closure of the first group 121 switches. The second of the output signals 152 from the logic circuit 116 is a command for opening or closure of the second group 122 switches. The third output signal 153 is the command for opening or closure of the first switch 131 load, connecting module 84 communication and control to the circuit 114 regulatory power. The fourth output signal 154 is a command for opening or closure of the second switch 132 load, connecting the conclusions 71, 72 device to the circuit 114 maintains the of power across the bridge 136.

The logic implemented in the preferred embodiment, (1, 4, 5, 6), is shown in Fig.7. using the diagram of States. The state diagram (Fig.7) blocks represent the system state, and the arrows show the transitions between States that occur when conditions or events. At the beginning of the operation in the lower-left block 161, which is the initial state or condition by default, closes the first group 121 switches, opens the second group 122 switches, opens the first switch 131 load and closes the second switch 132 load. Therefore, the device 112 energy storage have a parallel configuration and are ready to take charge of the bridge 136. The signal about their state of charge is supplied to the connector 142 and is less than 1.5 Volts, however, the logic circuit 116 when it is turned off. In the state of 161 system is considered as inactive, device energy storage are considered open, but ready to take charge.

When alternating current flows through the circuit borehole parallel to the conclusions 71, 72 device 112 energy storage begin charging, and the system enters state 162. In state 162, if the device 112 energy storage have been charged to the point where the voltage reaches 1.5 V, the system enters a state 163, logic circuit 116 is activated and can then respond to the voltage on lines 141, 142. In state 162, if the alternating current ceases to flow when reaching 1.5 Volts to the device 112 energy storage scheme goes back to the state 161, inactive, but ready to receive a big charge.

In the state of 163 device 112 energy storage continue to take charge, and logic circuit 116 controls the voltage on lines 141 and 142. When the power is turned off AC logic circuitry responds to this condition by line 141, and the system enters state 164.

In state 164 logic circuit 116 disconnects group 121 switches, rounded out the group 122 switches, disconnects the switch 132 and starts the delay circuit in time. The purpose of the delay is to allow the switching transitions of the parallel configuration of serial devices 112 in the mode of fading, when the delay is short, of the order of several milliseconds. If the AC include again when the delay timer is still running, the navigation system back returning to the state 162, otherwise the system goes into a state 165, when the delay time has expired.

In the state 165 logic circuit 116 supports group 121 switches open and groups is 122 switches closed, but closes the switch 131 of the load to supply power to the main load 84. The system remains in state 165 as long as the AC will not appear again, which occurs on line 141, or up until the storage device of electricity will not be discharged so that the voltage appearing on line 142, drops below 7.5 Volts. If you receive an alternating current power supply, the system enters the state of 162 with its associated settings for switches 121, 122, 131, 132. If the storage devices are discharged before re-appearance of alternating current, the system enters a state 161 with its associated settings for switches 121, 122, 131, 132.

The system described with reference to Fig.7, ensures that the downhole equipment can be activated by using a specific procedure and discharged from the inactive state 161, and immediately after its charge and activate it turns into a known state. It is clear that this requirement is a necessary element in the successful implementation of available devices that operate using the stored energy when the device energy storage can be discharged.

As described with reference to the state diagram (Fig.7), the downhole device 50 transmits data or information is rmatio on measurements up the wellbore to the surface computer system 52, using the modem 94 only when there is no AC power from a surface source 54 food. This helps to eliminate noise during transmission up the borehole of the downhole device 50 in the surface computer system 52. Professionals it is clear that the logic control algorithm logic circuit 116 described the preferred option implementation is given here only as an illustration and may vary.

When the control cycle charge-discharge devices 112 energy storage with schema 114 regulation of supply and logic 116 even strictly limited applicability downhole power can be used to charge devices 112 energy storage, and power can be extracted for the excitation of electrical or electronic equipment with a much higher rate than the rate of charge. Typical downhole electrical equipment may include (but not limit) motors, drives, valves and actuators, and sources of acoustic signals. Such electrical equipment often requires a high power supply during use, but is used only periodically. Therefore, the present invention provides methods of charge downhole devices 112 energy storage with one what korostil (for example, the limited supply and discharge of stored energy in the device 112 storing energy at a different rate (e.g., short-term load large capacity). Therefore, among other things, the present invention allows to overcome many hardships caused by the limitations of power, available in the well.

A characteristic feature of the devices 112 energy storage (chemical current sources and capacitors) is that their individual work capacity may be limited to values that are lower than those required for operation of electronics or electrical equipment installed in the well. In cases where the downhole power is strictly limited by losses in the transmission power, the power that can be developed, may be limited to values that are lower than is necessary to ensure the normal operation of electrical circuits.

By its nature, the downhole device 50 are often located in groups inside a borehole. Compared with their distance from the surface interval between downhole devices within the group is small. Because of their relative proximity to each other sometimes advantageous to transfer power from one downhole device to another using tubing of the column 40 and/or casing colon is s 30 as electrical conductors or paths of energy transfer between them. This method of power distribution depends on the software controlled connection to select the configuration of connections between modules storing energy in each downhole device and the load, which may have a different downhole device. Such a controlled connection can be performed using the internal electronics with one or more downhole devices, and using the surface computer system 52 or combinations thereof. Consequently, powered by a downhole device, in which more than one group, you can submit at one point, thus providing a higher power consumption at this point use in comparison with the case where each downhole device relies only on its own local storage capacity of energy. Similarly, in the case where the energy storage within a single downhole device failed, the device can be connected to the power supply from neighboring devices. Thus, storage of energy, broken, out of work, without exception, from the use of downhole devices, which have experienced disruptions in energy storage.

In other possible ways of implementation of the present invention having multiple downhole devices (not shown), each downhole device 50 contains device 112 is wound energy, which can provide power to only one downhole device 50 or may switch to supply power booster column 40 and/or the casing 30. Each downhole device 50 may consume power only from their own local device 112 energy storage or have their local food replenished at the expense of power consumption of the tubing of the column 40 and/or the casing 30. In the latter case, the power may be supplied from other devices 112 energy storage, located in the neighbouring downhole devices 50, as described above, and/or from a surface source 54 food.

In other possible ways of implementation of the present invention, each switch of the first and second groups 121, 122 switches can be independently rasmijoti or close in order to provide multiple voltage levels to a load or loads by changing the switch positions. Thus, a separate and independent output voltage low level can be submitted in parallel to multiple loads (for a number of loads or for multiple load mode) while maintaining the ability to charge all devices 112 energy storage.

The elements of the downhole device 50 can be modified for other possible options for implementing this is part II of the invention. Some possible items that you can replace or add to the elements of the downhole devices include (but are not limited to) electric servo motor, another motor, other sensors, transducers, electrically controlled device discharge indicator, electrically controlled device discharge of chemicals, tank for chemical or indicator, valve, electrically operated, relay modem, Converter, computer system, storage device, the microprocessor, the power transformer, hydraulic pump with electric control and/or actuator, pneumatic pump with electric control and/or drive or any combination thereof.

In addition, the elements of the module 90 energy storage can vary, but it will always have at least one unit 112 of energy storage. For example, the module 90 energy storage can be as simple as a separate device 112 energy storage and some wires for electrical connection. Module 90 energy storage can be very complex, containing, for example, the number of devices 112 energy storage, a microprocessor, a storage device, cost control, digital power meter, digital voltmeter, digital ammeter, numerous switches and modem. On the other sides of the, module 90 energy storage can be located in the middle between these cases, as the unit of conservation of energy.

Specialists will be clear that the present invention provides an oil production well and the way that drill hole for power supply and energy conservation in the well. It should be understood that the drawings and detailed description is given here for illustrative and not restrictive purposes and are not intended to limit the invention to the specific forms and disclosed examples. On the contrary, the invention includes any additional modifications, changes, rearrangements, substitutions, alternatives, design selection and implementation options for clear assistants, without deviating from the essence and scope of the present invention, as a specific module 90 of the preferred option implementation described here and shown in figures 1, 4, 5.

The present invention can be applied to any type of oil wells (for example, mine exploration, injection well, a production well, where the power in the well it is necessary for electronic or electrical equipment. The present invention can also be applied to other types of wells (different from oil wells), such as water wells.

The present invention m is should be included many times in one oil well, having one or more productive areas, or in an oil well having multiple lateral or horizontal end extending from it. Since the configuration of the borehole depends on the location of natural formations and location of productive zones, the number of applications and the placement options exercise of the present invention can accordingly be changed in order to meet the requirements of education or to meet the requirements of production or injection in drilling the well using the following claims. Thus, it is understood that the following claims cover all such additional modifications, changes, rearrangements, substitutions, alternatives, design choice and options for implementation.

1. System to supply power to the downhole device containing the device impedance current, concentrically located around the piping structure of the well for at least partial formation of the conductive parts for the transmission of electric current changing over time, through and along the conductive portion of the piping structure, and the energy-storage device, adapted for electrical connection to a conductive portion of the piping structure to overcharge with electric current changing over time, and for connection to the downhole device to supply power to the downhole device.

2. The system under item 1, in which the energy-storage device contains a secondary chemical current source.

3. The system under item 1, in which the energy-storage device contains a battery.

4. The system under item 1, in which the energy-storage device includes a capacitor.

5. The system under item 1, in which the device impedance current is induction choke, unconnected to the power supply containing ferromagnetic material and providing a complete resistance to an electric current varying in time, in the wall of the pipeline structure, depending on the size, geometry and magnetic properties of the induction choke and its location relative to the pipeline structure.

6. The system under item 1, in which the pipeline structure contains at least a portion of the operating pump and compressor casing.

7. The system under item 1, in which the pipeline structure contains at least part of the casing of the well.

8. The system under item 1, additionally containing the control scheme of the power supply, adapted to switch between a charging configuration of the electric circuit and the bit configuration of the electric circuit for the device of storing energy is AI.

9. The system under item 8, further containing a logic circuit adapted to automatically control the control scheme of power.

10. Oil well containing a pipeline structure having a conductive portion and passing between the surface and the location of the well, the power source located on the surface and electrically connected to the conductive portion of the piping structure and adapted to output current, time-varying, the device impedance, set around a pipeline structure for at least partial formation of the conductive portion of the piping structure, the downhole module energy storage, containing the energy-storage device and associated with the conductive part of the pipeline structure, and the device with power supply, located in the well and electrically connected to the module energy storage.

11. Oil well under item 10, in which the device with the power supply contains the sensor.

12. Oil well under item 10, in which the device with the power supply contains a transformer.

13. Oil well under item 10, in which the device with the power supply contains a valve with electric control.

14. Oil well under item 10, in which the device with power supply soda is separated by the electric motor.

15. Oil well under item 10, in which the device with the power supply contains the modem.

16. Oil well under item 10, in which the device with the power supply contains a system of injection of chemical reagents.

17. Oil well under item 10, in which the pipeline structure contains at least a portion of the operating pump and compressor casing, and the circuit of the reverse current contains at least part of the casing of the well.

18. Oil well under item 10, in which the pipeline structure contains at least part of the casing of the well.

19. Oil well under item 10, in which the circuit of the reverse current is a circuit reverse current through the earth.

20. Oil well under item 10, additionally containing the control scheme of the power supply, adapted to switch between a charging configuration of the electric circuit and the bit configuration of the electric circuit module for energy storage.

21. Oil well on p. 20, optionally containing a logic circuit adapted to automatically control the control scheme of power.

22. Oil well under item 10, in which the energy-storage device contains a secondary chemical current source.

23. Oil well under item 10, in which the energy-storage device contains a battery.

24. Oil is the second well in a p. 10, in which the energy-storage device includes a capacitor.

25. Oil well containing a casing, passing in the wellbore, operating the booster column, passing in the casing, a power source located on the surface, electrically connected and adapted to supply an electric current varying in time, at least, tubing column or casing, downhole modelirovaniya energy, electrically connected to at least the tubing string or casing, downhole device with power supply, electrically connected to the storage module the energy downhole induction choke located around the part, on minicamera, one of the tubing of the column and the casing, and adapted to channel a portion of the electric current in the energy-storage device.

26. Oil well on p. 25, in which the induction choke is not connected to the power supply and contains a ferromagnetic material.

27. Oil well on p. 25, in which the module energy storage contains secondary chemical current source.

28. Oil well on p. 25, in which the module energy storage contains the battery.

29. Oil well on p. 25, in which the storage module the energy and includes a capacitor.

30. Oil well on p. 25, additionally containing the control scheme of the power supply, adapted to switch between a charging configuration of the electric circuit and the bit configuration of the electric circuit module for energy storage.

31. Oil well on p. 30, optionally containing a logic circuit adapted to automatically control the control scheme of power.

32. The way oil wells, containing the following steps: providing conductivity pipeline structure in the wellbore at least partially through the device impedance current; the power is in the conductive portion of the piping structure, and a power source adapted to output current varying in time; saving electrical energy downhole module storing energy; a charging module energy storage using current, time-varying, during the extraction of oil from the well; a discharge device storing energy as it is necessary to supply the device with power supply, located in the well during the production of oil from wells.

33. The method according to p. 32, which use the module storing energy, comprising the device with power supply, containing the sensor and the modem, and which further comprises the steps OBN who pursued the values of physical quantities in the well with the help of sensor and data about the physical variable in the surface of the device with a modem and via pipeline structure.

34. The method according to p. 33, in which the data transmission on the physical variable is performed in the absence of a charging device storing energy from the power source.

35. The method according to p. 32, which is used as a module, energy storage, including many energy storage devices, and which contains the stages parallel charging devices hraneniya, and serialdischarge of the energy storage devices.

36. Way to power the downhole device, containing the following steps: providing a downhole module energy storage, containing the first group of electrical switches, a second group of electrical switches, two or more energy storage devices and the logical circuit; when the coil is energized in the module energy storage circuit of the first group of switches and opening the second group of switches to form a parallel circuit at the ends of the energy storage devices and charging the energy storage devices; during charge, upon termination of current flow, submitted to the module energy storage and in the presence of energy storage devices voltage level smaller than the first predetermined voltage level, trip the first group of switches and closing the second group of switches for the formation of the project for a sequential circuit at the ends of the energy storage devices and discharge these devices as it is necessary to power the downhole device; during charging, if the energy storage devices of the voltage level greater than the first predetermined voltage level, the enable logic circuit; when the logical schema expectation of current supplied to the module energy storage, to stop the current flow; upon termination of current flow implementation time-delay for a specified time interval; when the resumption of current flow prior to the expiration of the specified time interval, the sequel to charge energy storage devices; when after a predetermined interval of time, the opening of the first group of switches and closing the second group of switches for the formation of sequential circuits at the ends of the device energy storage; the discharge of the energy storage devices as needed to power the downhole device; when the resumption of current flow circuit of the first group of switches and opening the second group of switches for the formation of a parallel circuit at the ends of the energy storage devices; charging of energy storage devices; low voltage energy storage devices below the second predetermined voltage level off logic.

37. The method according to p. 36, further containing the step of transmitting data from the downhole condition the device is in the surface modem in excess of a predetermined time interval time delay, the blackout in the module storing energy and the excess of the voltage level of the storage devices of the second specified voltage level.



 

Same patents:

FIELD: oil production industry, particularly to perform fluid flow control during oil extraction process.

SUBSTANCE: well has casing pipe with a plurality of perforated sections and production string located inside casing pipe. Alternating current source electrically linked with at least one of casing pipe and production string is located on ground surface and serve to conduct alternating current from ground surface into well through casing pipe or production string. Controlled well section is also provided. Controlled well section includes communication and control unit electrically linked with at least one of casing pipe and production string and having sensing means and electrically operated valve connected thereto. Communication and control unit is adapted to regulate flow between outer and inner production string parts at least partly in accordance with sensing means measurements. To extract oil a number of controlled well sections are provided. Some controlled well sections have flow limiter retarders located around production string part to prevent fluid flow between controlled well sections. Fluid characteristic is measured in each controlled well section and fluid flow is regulated on the base of performed measurements at least in one controlled well section with the use of valves. Then oil is extracted from well through production string. Fluid injection is performed along with control fluid flow from inner production string part to outer one with the use of above method, wherein each controlled well section is provided with above flow retarder. Packer or electrically operated packer comprising electrically operated valve or expanded production string part or sleeve located around production string in perforated casing pipe section may be used as the flow retarder. Flow, pressure or fluid density transducers or acoustic signal converter may be used as the sensing means.

EFFECT: provision of dynamic oil extraction process control for optimization thereof.

32 cl, 6 dwg, 3 ex

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

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 jet units.

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3 cl, 3 dwg

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4 cl, 10 dwg

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EFFECT: higher efficiency.

3 cl, 22 dwg

FIELD: oil producing industry; pumping facilities.

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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.

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2 cl, 1 dwg

FIELD: oil producing industry; pumping facilities.

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2 cl, 1 dwg

FIELD: oil production industry, particularly to perform fluid flow control during oil extraction process.

SUBSTANCE: well has casing pipe with a plurality of perforated sections and production string located inside casing pipe. Alternating current source electrically linked with at least one of casing pipe and production string is located on ground surface and serve to conduct alternating current from ground surface into well through casing pipe or production string. Controlled well section is also provided. Controlled well section includes communication and control unit electrically linked with at least one of casing pipe and production string and having sensing means and electrically operated valve connected thereto. Communication and control unit is adapted to regulate flow between outer and inner production string parts at least partly in accordance with sensing means measurements. To extract oil a number of controlled well sections are provided. Some controlled well sections have flow limiter retarders located around production string part to prevent fluid flow between controlled well sections. Fluid characteristic is measured in each controlled well section and fluid flow is regulated on the base of performed measurements at least in one controlled well section with the use of valves. Then oil is extracted from well through production string. Fluid injection is performed along with control fluid flow from inner production string part to outer one with the use of above method, wherein each controlled well section is provided with above flow retarder. Packer or electrically operated packer comprising electrically operated valve or expanded production string part or sleeve located around production string in perforated casing pipe section may be used as the flow retarder. Flow, pressure or fluid density transducers or acoustic signal converter may be used as the sensing means.

EFFECT: provision of dynamic oil extraction process control for optimization thereof.

32 cl, 6 dwg, 3 ex

FIELD: geotechnological mining operation methods, particularly for oil extraction from unstable and semiconsolidated reservoirs.

SUBSTANCE: composition comprises binding agent, additive, structure-forming agent and water. Binding agent is polyurethane hydrophilic pre-polymer, structure-forming agent is sodium chloride free from hydration water, additive is sand. All above components are taken in the following amounts (% by weight): polyurethane hydrophilic pre-polymer - 7-15, sodium chloride - 18-48, sand - 24-55, water - remainder.

EFFECT: increased oil recovery from reservoir, provision of necessary filter permeability and strength parameters, provision of filter hydrophilic behavior.

1 tbl

Borehole filter // 2258786

FIELD: mining industry, particularly equipment for water intake, oil and gas wells arranged within the interval of production bed made up of soft rock.

SUBSTANCE: borehole filter includes perforated body, filtering jacket made of independent sections with wire winding, packing members and end sleeves connected to perforated body. Filtering jacket is formed of easy-drillable material, for instance of polyethylene or propylene. End sleeves are connected with perforated body by means of shear pin. Packing members of filtering jacket are made as perforated tubes connected to end sleeves. Perforated body has solid outer surface and provided with blind tube having double connection coupling including outer member having tool-joint thread hand orienting in the same direction as that of perforated base, and inner member having opposite tool-joint thread hand.

EFFECT: improved maintainability and increased efficiency of well repair.

3 cl, 1 dwg

FIELD: oil production industry, particularly for obtaining oil, gas, water, soluble or meltable materials or slurry of minerals from wells.

SUBSTANCE: liquid sand carrier comprises liquid hydrocarbon, cation-active surfactant, namely product of lanolin production obtained by wool fat processing, and aqueous phase. Cation-active surfactant is emulsifier, aqueous phase is aqueous solution of calcium chloride with 1010-1020 kg/m3 density. The components are taken in the following amounts (% by weight): liquid hydrocarbon - 20-25, emulsifier - 0.5-1.5, remainder - aqueous solution of calcium chloride. Liquid sand carrier comprises gas condensate or diesel fuel or oil used as the liquid hydrocarbon.

EFFECT: increased carrying capacity due to increased viscosity and stability thereof and, as a result, reduced consumption sand carrier, volumetric injection rate and reduced range of necessary technical means used for hydraulic fraction performing, increased productive bed permeability recovery factor due to prevention of bottomhole formation zone contamination.

2 cl, 9 ex, 2 tbl

FIELD: oil producing industry, particularly enhanced recovery methods for obtaining hydrocarbons.

SUBSTANCE: method involves injecting dispersion of oil-soluble nonionic surfactant of oxyethylated alkyl phenol with 5-7 oxyethyl groups in mineralized water into reservoir through injection wells; forcing above dispersion of 1-2% concentration in amount of 750-1500 m3 per one well into reservoir with the use of mineralized water taken in amount of 1-2 well borehole volumes; sustaining technological time interval for 7-14 days.

EFFECT: increased efficiency of oil washing out with the use the dispersion of oxyethylated alkyl phenol in mineralized water due to increased reservoir sweep, reduced costs.

2 tbl

FIELD: oil production, particularly methods or apparatus for obtaining products from wells.

SUBSTANCE: method involves displacing working agent under elevated pressure and performing curing thereof. For bottomhole zone treatment bath for working agent having 4-6 m3 volume is provided in perforation interval and curing time is up to 9 hours. Working agent is displaced by discharge water in impulse draining mode including pressure increase at well head up to 11-13 MPa and pressure drop operations, wherein number of impulses is 30-50. Then 20-40 m3 of 3-8% hydrochloric acid solution is displaced, curing is performed for not more than 4 hours and discharge water is injected in amount of 20-40 m3.

EFFECT: increased intake capacity of well.

1 ex

FIELD: oil production, particularly methods or apparatus for obtaining products from wells.

SUBSTANCE: method involves displacing working agent under elevated pressure and performing curing thereof. For bottomhole zone treatment bath for working agent having 4-6 m3 volume is provided in perforation interval and curing time is up to 9 hours. Working agent is displaced by discharge water in impulse draining mode including pressure increase at well head up to 11-13 MPa and pressure drop operations, wherein number of impulses is 30-50. Then 20-40 m3 of 3-8% hydrochloric acid solution is displaced, curing is performed for not more than 4 hours and discharge water is injected in amount of 20-40 m3.

EFFECT: increased intake capacity of well.

1 ex

FIELD: oil production industry, particularly to obtain hard to recover oil reserves, mainly for carbonate reservoirs of nonuniformly saturated laminated stratums.

SUBSTANCE: method involves installing mast for swabbing on landing flange with the use of bolt connection with choosing height thereof of 3-4 m before downhole work initiation; successive grouping swabbed wells in dependence of obtained results after downhole work completion; operating wells in which output was increased or recovered in prior mode, namely in mechanized one, with bore-hole pump usage. Wells in which high output is obtained due to swabbing are operated under swabbing conditions. Wells in which output did not increase are operated with the swab usage by alternating product accumulation cycle with cycle of product pumping from well.

EFFECT: increased efficiency due acting on stratum by swabbing thereof with taking under consideration well conditions.

2 cl, 2 dwg

FIELD: hydrocarbon, namely oil, production, particularly for on-shore or off-shore drilling and for oil recovery from oil reservoirs.

SUBSTANCE: method involves drilling well along with recording earth background energy or amplitude spectrum; applying elastic resonating oscillations caused by grilling mud movement and rock-cutting tool rotation to oil pool area. Downhole drilling motor or geared turbodrill with rotary speed of not more than 100 rpm are used as the rock-cutting tool. Oscillation frequency and oil pool treatment duration are selected so that resonance effects with rapid pressure drop in resonance zone are obtained.

EFFECT: reduced time of well putting into operation along with increased efficiency of oil pool development.

12 cl

Well screen // 2258131

FIELD: oil production industry, particularly devices preventing ingress of formation sand and propane with extractable formation fluid from bottomhole formation zone into well.

SUBSTANCE: well screen comprises perforated tube and filtering member with pore dimensions increasing in radial direction from outer screen surface to inner one. Filtering member is installed coaxially to perforated tube surface and made of foamed metal having three-dimensional cellular structure. Cellular structure includes many-sided cells with permeable faces so that solid sand filter of deposited particles may be formed inside foamed metal. Deposited particles are mechanically attached to randomly oriented ribs and faces of the cellular structure.

EFFECT: increased filtering performance.

2 dwg

FIELD: oil extractive industry.

SUBSTANCE: method includes lowering a tail piece into well with temperature, electric conductivity and pressure sensors placed on tail piece along its length. Pressure sensors are used in amount no less than three and placed at fixed distances from each other. After that, continuously during whole duration of well operation between maintenance procedures, temperature, conductivity of well fluid, absolute value of face pressure and difference of pressures along depth of well in area of productive bed are recorded. Different combinations of pairs of pressure sensors are used for determining special and average values of well fluid density. When absolute pit-face pressure is lower then saturation pressure for well fluid by gas and/or when average values of density deviate from well fluid preset limits and/or when its conductivity deviates from preset limits, adjustment of well operation mode is performed.

EFFECT: higher efficiency, higher safety.

2 cl

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