Underwater inverter with dc power supply

FIELD: electricity.

SUBSTANCE: system and method of activation of underwater power consuming devices supplied with alternating current. System contains surface ship, underwater inverter and surface components installed on the surface ship. The inventor is made with possibility of underwater location and reception of DC power supplied from the surface ship. The inventor is made with possibility of DC power conversion to AC power for supply of the underwater consumer. The inventor is connected with cathode. Surface components are connected with the anode made with possibility of installation under water. The anode and cathode create reverse current channel via the sea water. The inventor is made with possibility to ensure three phase AC power for the underwater consumer at controlled frequencies based on control actions of the underwater control module.

EFFECT: invention ensures efficiency increasing of the supply process and control of the underwater consumers.

18 cl, 7 dwg

 

CROSS REFERENCES TO RELATED APPLICATIONS

[0001] the Present application claimed priority under provisional patent application U.S. No. 61/164,304, entitled "Underwater inverter power supply DC", filed on March 27, 2007, which is fully incorporated into the present application by reference.

The technical FIELD

[0002] the Present invention essentially relates to systems for underwater mining. In particular, the present invention relates to the configuration of the variable frequency drive is made with the possibility of use in the system of the underwater mining.

The LEVEL of TECHNOLOGY

[0003] This section is intended to introduce various aspects of engineering that may be relevant to various aspects of the present invention described and/or claimed below. It is assumed that this information is useful and provides background information to better understand the various aspects of the present invention. Accordingly, you should understand that these statements should be viewed in this way, and not in recognition of the previous level of technology.

[0004] Natural resources such as oil and gas, are the usual sources of fuel for various applications, for example, to heat homes, as an energy source vehicles, as well as to generate electricity is the power, to name a few of them. When the desired resources found beneath the surface of the earth, to access, extraction and other mining methods typically use a system of drilling and production. These systems can be located both on land and in the sea, depending on the location of the desired resource. When resources are located in the sea (e.g., under water), to extract resources can be used system for underwater mining. Such systems for subsea may contain components on the surface vessel, such as a floating drilling rig or platform and components located remotely from the surface vessel and a submerged position, usually in or near the subterranean formation (e.g., wells), which are resources. For example, the system for subsea can use at least one scuba equipment wellhead and wellhead wellhead equipment to control the flow of resources into the well or from it.

[0005] in Addition, the system for subsea can use at least one scuba energy consuming device, which is driven by the energy of alternating current, such as a pump, motor or compressor, to facilitate the extraction of resources from the well. For example, as the gradual extraction of the resource is from a well over time, natural pressure in the well can be reduced. Consequently, at some point during the life of the well, to facilitate the extraction of resources from the well to the surface vessel can be used underwater pump. Such energy-consuming devices (e.g. pumps, compressors and motors) are usually fed with alternating current, typically of the order of hundreds of kilowatts or even megawatts supplied by a source of AC energy, located on the surface. As a rule, together with the energy source of alternating current may be provided in the VFD to provide work underwater energy-consuming devices at different speeds. For example, the VFD may include an inverter that supplies power AC power with controlled frequency for underwater energy-consuming device that provides adjustable control of this underwater energy consuming device. As you can see, it can provide the start-up of subsea pumps and compressors at lower frequencies, and then gradually unwound to the desired operating speed.

[0006] In a conventional subsea systems for the extraction, variable frequency drive, usually located on the surface vessel (there is TSS near the surface energy source AC) or under water (essentially about underwater energy consuming device). For example, when scuba energy consuming device is located relatively close to the surface of the vessel (for example, about 15 kilometers or less), the VFD can be located on the surface vessel, usually in the immediate vicinity of the AC source. In the process, the output power of the AC surface of a VFD is transmitted underwater energy consuming device using at least one power conductor located in the cable with elektrorazryada connector. As an example, where the energy of three-phase alternating current is transmitted from the surface of a VFD to an underwater energy consuming device, the cable elektrorazryada connector can contain three power line alternating current transmission for transmitting power of three-phase alternating current (for example, 15 Hz, 30 Hz and 60 Hz AC).

[0007] When scuba energy consuming device is located farther from the surface of the vessel (for example, more than 15 kilometers), it may be desirable to have the VFD, located on the surface vessel, at least part of the undesired harmonics and reflected signals, which can proavis is because of the way AC transfer over long distances. In such cases, it may be appropriate to use the VFD, located under the water and away from the surface of the vessel (for example, usually located in the immediate vicinity of the underwater energy consuming device). In this configuration, the alternating current from the AC source to the surface vessel may be transferred using the aforementioned cable with elektrorazryada connector to the subsea frequency-controlled drive for power supply to actuate the underwater energy consuming devices with different speeds.

[0008] unfortunately, the transmission of alternating current, especially at large distances beyond explored space, are not always effective. In order to improve transmission efficiency AC energy, one of the technologies that were used, is to increase the AC voltage transmitted through wire AC energy, through the use of subsea and/or surface components of the transformer. However, such components are typically expensive and can be added to the total cost of resource extraction. Another technology that was used to improve the efficiency of energy transfer, AC, is the transmission of alternating current at a lower frequency. However, even with such m is R, the transmission of alternating current at a relatively low frequency of 15 Hz can still lead to decrease in efficiency of approximately 20% for every 200 kilometers outside of the explored area. In addition, the relatively high cost of cable usage elektrorazryada connector having a sufficient diameter to transmit AC (in particular, multiphase AC) at large distances, often burdensome and added to the total cost of resource extraction. In addition, the transmission of alternating current over large distances may additionally lead to potentially undesirable harmonics and the reflected signals generated by near sensitive underwater electronic equipment. Moreover, in systems in which the VFD is located under water to work with underwater energy consuming devices AC, operation, repair and/or maintenance of a VFD may be impractical and/or difficult.

[0009] In light of the above drawbacks, in particular, it may be desirable to secure a more efficient power and control of underwater energy consuming devices AC.

BRIEF DESCRIPTION of DRAWINGS

[0010] Various features, aspects and advantages of the present invention will become clearer upon reading the following detailed description with reference to the accompanying drawings in which the same symbols represent the same elements in the sun the x shapes.

[0011] Fig.1 is a simplified block diagram of a system for subsea production in accordance with the variant of realization of the present invention.

[0012] Fig.2 is a simplified block diagram of a VFD, which can be implemented in the system subsea shown in Fig.1.

[0013] Fig.3 is a diagram of the actuation of the underwater energy consuming device, powered by an alternating current, in accordance with the variant of realization of the present invention.

[0014] Fig.4A-4C depict simplified schematic of the actuation of at least one underwater energy consuming device, powered by an alternating current, in accordance with additional options of implementation of the present invention.

[0015] Fig.5 is a view in section of the cable with elektrorazryada connector for transmitting power of three-phase alternating current.

[0016] Fig.6A-6D are views in section of the cable with elektrorazryada connector for the transmission of direct current to the subsea inverter in accordance with some of the options for implementing the present invention.

[0017] Fig.7 is a graph comparing the efficiency of energy transmission AC transmission efficiency energy DC for a comparable voltage at different distances over the limit and explored the area.

DETAILED description of the IMPLEMENTATION OPTIONS

[0018] At least one particular embodiment of the present invention will be described below. These described the embodiments are only examples of the present invention. In addition, when you attempt a detailed description of these exemplary implementation options, all features of an actual implementation may not be disclosed in the description. It should be noted that during the development of any such actual implementation, as in any engineering or design project, to achieve the specific goals of the designers should be adopted numerous decisions, implementation-specific, such as compliance with the restrictions relating to the technical and financial requirements, which may vary from one implementation to another. Furthermore, it should be noted that these works of designers can be complex and time-consuming, but nevertheless will be conventional in design, engineering and fabrication for secondary specialists familiar with the advantages of this description.

[0019] In the description of elements of different implementations of the present invention, the terms "some", "some", "this", "this" and the like should be understood as indicating that there is at least one element. The terms "enabling the th", "comprising", "having", etc. in all cases should be understood as including or indicates that there may be additional elements other than those listed. The use of the terms "top", "bottom", "above", "below" and their variants are made for convenience and does not require any particular orientation of the components.

[0020] Some exemplary implementations of the present invention provide systems and methods for actuating underwater energy consuming devices, powered by an alternating current, such as a pump, motor, compressor, or a combination of them. In particular, some versions provide a "division" of a VFD, which may include a rectifier and filter DC, located on the surface ship undersea mining system and inverter are located underwater remotely, for example, near underwater energy consuming device AC. In operation, the AC power source located on the surface of the sea underwater mining system that delivers alternating current to the rectifier. The rectifier converts AC power to DC power, which is then filtered by filter DC. The filtered direct current is then passed from the surface vessel to a subsea inverter through the line just the current frame, enclosed in an underwater cable with elektrorazryada connector. Underwater inverter converts the transmitted energy DC back into AC electric power, which is then used to actuate the underwater energy consuming device. In some embodiments of the present invention an underwater inverter can be connected to the cathode, is formed through the sea water channel of the reverse current to the anode, is connected to the surface components separated variable frequency drive.

[0021] Refer initially to Fig.1, where in accordance with the variant of realization of the present invention shows an example of a subsea production system, which is then indicated by the number 10. Subsea production system 10 may be a system of mining, located in the sea, and may contain surface vessel 12, which may be floating drilling rig or platform, typically located on the sea surface 14. Subsea production system 10 may include underground reservoirs or wells, located under the bottom of the sea in the place offshore. It should be borne in mind that in the context of subsea resources, such wells may be located at such a depth or distance, which is usually referred to as the 'distance beyond explored space" from ernestinovo vessel 12.

[0022] Each well can contain the wellhead (not shown), each of which can be controlled by the respective wellhead wellhead 16. The gushing wellhead equipment 16 generally controls the extraction of resources such as hydrocarbons (e.g. oil, gas, and so on) from the well. In the depicted embodiment, the implementation of the present invention gushing wellhead equipment 16 may be under the control of controller 18, which may receive control signals from the surface vessel 12 through the control line 20. For example, the controller 18 may be remotely controlled by the operator from the surface vessel 12. Control signals received by the controller 18, may be brought to the gushing wellhead 16 in the form of control actions 22.

[0023] Each wellhead wellhead equipment 16 may include extracting the bends 24, providing a channel through which produced fluid extracted from the well, can come to a common manifold 26. Operating on alternating current underwater pump 28 may be used to facilitate pumping produced fluids taken in the reservoir 26 to the surface of the vessel 12. For example, in this illustrated implementation of the present invention an underwater pump 28 can take the produced fluid from the manifold 26 chere the h pipe 30 and then to pump the received fluid to the surface of the vessel 12 through the various casing and/or the ascending design, indicated here by the number 32.

[0024] In accordance with features of this technology, the underwater pump 28 can operate using a "shared" variable frequency drive, which contains as components located on the surface 14 (the surface components 36), and components located under water. The surface components 36 VFD may include a rectifier 38 and filter 40 DC. The rectifier 38 may take the energy from the source 34 AC, also located on the surface vessel 12. For example, the source 34 AC can work as the main source of energy for the surface vessel 12. In operation, the rectifier 38 will change alternating current into direct current. In addition, as an example, the rectifier 38 may have at least one diode, bipolar transistor with insulated gate (IGBT) or a thyristor (also known as silicon triode thyristor (KTT)), or other transistor of the appropriate type. Constant current supplied from the rectifier 38, and then filtered through filter 40 DC. This is done in order to smooth the DC current before sending it, thus providing a cleaner output waveform AC for underwater energy consuming device is VA 28.

[0025] the Underwater component of "shared" variable frequency drive contains the inverter 44. That is, the inverter 44 shown as a component of a VFD is located remotely from the surface components 36 (rectifier 38 and filter 40 DC). Filtered direct current may be transferred from the surface components 36 to the subsea inverter 44 through conductor DC, placed inside the cable 42 with elektrorazryada connector. The subsea inverter 44, after receiving the constant current through the cable 42, converts the direct current back into alternating current, which can be used to actuate the subsea pump 28. In practice, the subsea inverter 44 may be controlled by controller 18 (using control signals 22) so that the resulting alternating current is fed to an underwater pump 28 is controlled. That is the work of the underwater pump 28 can be adjusted by controlling the frequency and/or voltage of electric power supplied via the inverter 44.

[0026] Refer now to Fig.2 shows a simplified block diagram of a VFD, which can be implemented in the system 10 subsea shown in Fig.1, and which is next to the General reference number 50. As mentioned above, variable frequency drive is 50 may contain surface components 36 and the subsea inverter 44. The surface components 36 can usually be located on the surface vessel 12 and may include a rectifier 38 and filter 40 DC. The rectifier 38 may take the energy from the source 34 AC, also located on the surface vessel 12. In this implementation of the present invention is an alternating current 52 supplied by source 34 AC, may be three-phase. In additional embodiments of the present invention, however, the source 34 AC can serve single-phase alternating current.

[0027] the Rectifier 38 converts AC 52 supplied by source 34 AC to DC current, which is denoted by the reference position 54. As will be clear, the rectifier 38 may include at least one diode, bipolar transistor with an insulated gate, or thyristor, properly configured for converting alternating current into direct current. For example, in one implementation of the present invention, the rectifier 38 may contain six diodes connected in an electrical bridge circuit for converting three-phase alternating current into direct current. The rectified DC 54 further filtered by the filter 40 DC. As mentioned above, the filtering process can smooth the DC 54 that can provide the process flow net AC power (for example, 60) from the VFD to 50.

[0028] Then filtered direct current is passed from the surface of the vessel 12 to the subsea inverter 44. Transfer of DC can be carried out on the DC input line, indicated here by the number 56. Line DC may be enclosed in a cable 42, shown in Fig.1. Thus, compared to traditional underwater production system in which the transmission of alternating current, in particular a three-phase alternating current (for example, from the surface of the AC source to an underwater frequency-controlled drive or from the surface of a VFD to an underwater energy consuming device) requires a cable with elektrorazryada connector having three separate AC line proposed is illustrated an embodiment of the present invention can provide an adequate supply of underwater energy consuming device using a cable 42, which contains only one line 56 DC.

[0029] in Addition, as will be explained in more detail below, the line DC, as a rule, smaller in diameter than the conductor of an alternating current, is designed to transmit a comparable voltage. For example only, the usual line AC for transmission of about 10 kilovolt is (kV) for actuation of the underwater pump 28 can be from about 2,54 3,81 to centimeters (1 to 1.5 inches) in diameter. AC line require additional insulation (for example, approximately 2.54 cm (1 inch) of insulation around each conductor), in particular, when multiple conductors are placed in the same cable with elektrorazryada connector. For the transmission of three-phase alternating current by cable with elektrorazryada connector having three conductor AC power, each of them requires adequate insulation coating. Thus, the diameter of conventional cable with elektrorazryada connector for transmitting three-phase alternating current, taking into account the external insulating coating that surrounds the three lines AC and their respective insulating layers, can reach 30,48 or more centimeters (12 or more inches).

[0030] In contradiction to this, the cable 42 in accordance with aspects of the described variants of the invention can provide a constant current to the subsea inverter 42 using one line DC. Typically, the line DC, suitable for transmission to a specific voltage, thinner than the line AC, is designed for the same voltage. For example only, the line of constant current (e.g., 56) for transmission of about 10 kV may be approximately from 1.27 to 1.9 centimeters (0.5 to 0.75 inch) in diameter and can also demand the less isolation compared to the line AC. In other words, the cable 42 and thinner, and less complex than comparable cable with elektrorazryada connector used to transmit AC in traditional subsea production systems. As will be clear, this rational approach may provide a more cost-effective cable 42, thereby reducing the overall material and production costs for the supply of underwater energy consuming device 28. In addition, the cable 42, compared to traditional cables with elektrorazryada connector AC in General can be thinner and lighter and consequently requires less supporting structures to support the DC input line. As will be clear, it can cause the reduction of load on the surface vessel. In addition, due to the generally smaller size of the cable 42, during transportation and prior to deployment requires less space.

[0031] will Continue the description of the subsea inverter 44, shown in Fig.2. When receiving energy direct current transmitted over the power line 56 DC (submarine cable 42), the subsea inverter 44 converts the DC back into three-phase alternating current 60, which can then be used to actuate the alternating current underwater energy consuming device 28. Although scuba energy consuming device is about 28 AC, shown in this embodiment of the invention may be underwater pump, it should be noted that various underwater energy consuming devices can be controlled using the shown variable frequency drive. So, for example, underwater energy consuming device can also be asynchronous motor, compressor, pump motor pumping sea water pump-motor system separation and so on. In addition, the embodiments disclosed VFD can be used to control multiple components with the actuator (for example, to control opening and closing of valves, actuators and other components) in various types of equipment, including the gushing wellhead equipment (e.g., 16), manifolds, engines, pumps, and so forth.

[0032] in Addition, the subsea inverter 44 may be placed in an underwater protective housing 58, which may serve to protect the subsea inverter 44 from the underwater environment. Underwater housing 58 in some embodiments of the invention may include an interface through which the subsea inverter 44 and its corresponding housing 58 may be extracted from an underwater position for inspection, maintenance and/or repair. Compared to traditional on the water system production, in which the components of a variable frequency drive (rectifier, filter DC and inverter) or are completely under water, or entirely on the surface, disclosed the embodiments of the present invention is placed under water, only the inverter 44. As will be clear, this reduces the number of electronic components, and, thus, the overall size of the part of variable frequency drive 50, which is under water. For example, the disclosed embodiment of the present invention can provide at least 66% reduction in the overall size of the underwater part of the VFD (for example, only the inverter 44). Other embodiments of the present invention can provide at least, 50%, 60%, 70%, or 80% reduction in the size of the underwater part of the VFD.

[0033] In Fig.3 shows a circuit 70 for actuation of the underwater energy consuming device 28 in accordance with aspects of embodiments of the present invention. As can be seen, the circuit 70 may contain a source 34 AC variable frequency drive 50 (containing the surface components 36 and the subsea inverter 44), as discussed above in Fig.2. As explained above, the source 34 AC can give energy 52 three-phase alternating current to the surface is Tim components 36 VFD 50. The surface components 36, which, as a rule, can be located on the surface 14 of the submarine system 10 production, contain the rectifier 38 and filter 40 DC. The rectifier 38 may convert energy 52 alternating current source 34 AC, DC 54. DC 54 at the output of rectifier 38 is then filtered by filter 40 DC to smooth DC before sending to the subsea inverter 44 by line 56 DC.

[0034] Line 56 DC may contain a single conductor DC to send a filtered direct current to the subsea inverter 44. In underwater mining system line 56 DC may be enclosed in a cable 42 (as shown in Fig.1) for connection of the surface components 36 with underwater inverter 44. The cable 42 can provide isolation and protection of the power line 56 DC. In the present embodiment of the invention, the cable 42 may include a single conductor DC power for actuation of the underwater energy consuming device. In additional embodiments of the invention, as will be described in more detail below, the cable 42 may contain one power line DC to actuate multiple energy consuming devices or can is to contain several power lines DC to actuate multiple energy consuming devices, moreover, each power line DC provides actuation of the corresponding energy consuming device. Power line 56 DC can be performed to transfer the voltage of suitable magnitude to actuate the energy consuming device 28. Just as an example, in one embodiment of the invention the power line 56 DC can transmit voltage is approximately 7 to 10 kilovolts. In additional embodiments of the invention, the power line 56 DC can transmit the voltage from 1 to 10 kilovolts. In additional embodiments of the invention, the power line 56 DC can pass voltage is greater than 10 kilovolts.

[0035] the Subsea inverter 44 may convert the DC current power, adopted on power line 56 DC back into AC electric power, which can be used to actuate the underwater energy consuming device 28. For example, in the shown circuit 70, the subsea inverter 44 converts the DC current power transmitted by the power line 56 DC energy of 60 three-phase alternating current, which can be used to actuate the underwater energy consuming device 28, which may be n the suction, engine or compressor, as described above. In one embodiment of the invention a subsea inverter 44 may be designed to provide AC energy capacity in the range of about 2 to 4 megawatts. In additional embodiments of the invention underwater inverter can provide energy to the AC power in the range from approximately 1 to 5 megawatts.

[0036] in Addition, in the embodiment of the invention, the circuit 70 may include a channel reverse current through seawater. For example, the subsea inverter 44 may be electrically connected to the cathode 72 and the surface components 36, located on the surface vessel 12 may be electrically connected to the anode 74. The cathode 72 and the anode 74 can form underwater channel 76 reverse current through seawater. In addition, it should be understood that the subsea inverter 44 may provide energy 60 three-phase alternating current for underwater energy consuming device 28 on managed frequency based on the control actions of the controller 18, as discussed above with reference to Fig.1. For example, when scuba energy consuming device 28 is a three-phase asynchronous motor, the motor can be started slowly and gradually increase to the desired speed. the AK will be clear, this may allow underwater energy consuming device 28 to start working with full rated torque without excessive flow of current.

[0037] Each of figs.4A-4C shows another schemes that can be used to actuate the at least one underwater energy consuming device, powered by an alternating current, in accordance with the described methods. Consider first shown in Fig.4A circuit 77, where the source 34 AC energy can supply energy 52 three-phase alternating current to the surface components 36 VFD 50. As mentioned above, the surface components 36 may include a rectifier 38 to convert the energy of 52 three-phase alternating current into direct current. The surface components 36 may further comprise a filter 40 DC to filter the DC output from the rectifier 38 before passing direct current to the subsea inverter 44.

[0038] As noted above, the transmission of direct current from the filter 40 DC to the subsea inverter 44 may be provided on line 56 DC, which may be enclosed in a cable 42, shown schematically here by the dashed line enclosing line 56 DC. Underwater investment is Thor 44, after receiving the constant current passed through line 56 DC, converts the DC back into three-phase alternating current 60, which can then be used to actuate the underwater energy consuming device 28. Here, instead of using the channel 76 of the reverse current through seawater using cathode 72 and anode 74, as shown in Fig.3, applied additional line 80 reverse current, connecting the subsea inverter 44 with the surface components 36 VFD 50, closing thus the scheme. Here line 80 reverse current also lies in the cable 42 together with the power line 56 DC. In other words, the cable 42, in the variant shown in Fig.4A, may contain one line 56 DC for actuating one energy consuming device 28 AC, and one line 80 reverse current.

[0039] Fig.4B illustrates another embodiment of the circuit 78, which can be used for power supply and actuation several underwater energy consuming devices AC, shown here links 28a and 28b. Scheme 78 may contain a source 34 of alternating current for supplying energy 52 three-phase alternating current to the surface components 36 VFD 50. As mentioned is use, surface components may include a rectifier 38 to convert the energy of 52 three-phase AC current into DC current power and the filter 40 DC to filter the DC output from the rectifier 38. Filtered direct current may be transferred from the surface components 36 to the subsea inverter 44 by line 56 DC, which can be enclosed in the cable 42.

[0040] the Subsea inverter 44, after receiving a direct current passed by line 56 DC, converts DC current power into energy 60 three-phase alternating current. In order to actuate both underwater energy consuming devices 28a and 28b AC energy 60 three-phase alternating current filed from the subsea inverter 44 may be accepted by the system 82 power distribution. System 82 power distribution unit may be configured to supply a corresponding amount of AC energy to actuate each of the energy consuming devices 28a and 28b AC. For example, in the shown embodiment of the invention, the system 82 power distribution unit can supply power to 84 three-phase alternating current for actuation of the underwater energy consuming devices 28a and may supply power to 84 three-phase AC the current frame to actuate the underwater energy consuming device 28b. That is, in this embodiment of the invention, the cable 42 may contain one power line 56 DC to DC transfer, which can be used underwater inverter 44 and system 82 power distribution for actuating the set of energy consuming devices 28a and 28b AC.

[0041] while the proposed embodiment of the invention shows only two underwater energy consuming devices 28a and 28b connected to the system 82 power distribution, it should be understood that depending on the capabilities of the system 82 to deliver supplies can also be powered for more energy-consuming devices AC, using the proposed configuration. Scheme 78 also uses the channel 76 of the reverse current through the seawater, as described above with reference to Fig.3. That is, the cathode 72 may be connected with underwater inverter 44, and the anode 74 can be connected to the surface components 36 for the formation of the channel 76 of the reverse current through the sea water.

[0042] Refer to Fig.4C, showing the following variant of the circuit 79 to actuate the sets of underwater energy consuming devices 28a and 28b AC. Circuit 79 in fact contains two variable frequency drive 50, each of which receives energy 52 three is asnago alternating current from the common source 34 AC. For example, the source 34 AC delivers energy 52 three-phase alternating current at the surface components 36A and 36b, respectively, the first and second variable frequency drives. Each of the surface components 36A and 36b may contain the corresponding rectifier and filter components, as generally discussed above. Thus, each of the surface components 36A and 36b may produce a filtered DC respectively connected to lines 56a and 56b DC.

[0043] described In the proposed variant of the invention lines 56a and 56b DC can be enclosed in a single cable 42. A constant current is passed through each of the lines 56a and 56b DC can be obtained underwater inverters 44a and 44b, respectively. Underwater inverter 44a can convert the energy of the direct current transmitted over the line 56a DC energy 60A three-phase alternating current for actuation of the underwater energy consuming device 28a. Similarly, underwater inverter 44b can convert the energy of the direct current transmitted over the line 56b DC energy 60b three-phase alternating current for actuation of the underwater energy consuming device 28b. In other words, in the circuit 79 shown in Fig.4C, the cable 42 may contain the AMB line DC (56a and 56b) for each of the underwater energy-consuming device (28a and 28b) submarine system 10 production. In addition, underwater inverters 44a and 44b can be connected to a common cathode 72. The cathode 72 may provide the channel 76A reverse current through the sea water to the anode a connected with surface component 36A. The cathode 72 may also provide channel 76b reverse current through the sea water to the anode 74b connected to the surface component 36b.

[0044] As can be understood, certain aspects now disclosed methods provide for the transmission of direct current to the subsea inverter 44 one wire to the DC power supply. As will be shown below, the transmission of direct current, typically more efficient than the transmission of alternating current on the same large distance, such as one hundred or more kilometers. In addition, the cable 42 from one conductor to power the underwater energy consuming devices AC, usually smaller, less complex, and therefore more economical in comparison with cable elektrorazryada connector used in traditional subsea production systems, providing a direct transmission of alternating current from the surface of a VFD to an underwater energy consuming device, or from the surface of the AC source to an underwater frequency-controlled drive. For example, as noted by the camping above, in a conventional cable with elektrorazryada connector for transmitting three-phase alternating current may be required three separate lines of conductors of an alternating current.

[0045] let us now Turn to Fig.5, which shows a view in section of such a cable with elektrorazryada connector for transmitting three-phase alternating current, indicated by the position 90. As can be seen, the cable 90 may contain external insulating layer 92. The outer insulating layer 92 may serve as a protective tool, isolation and location for the three conductor AC 94, 96 and 98, each of which is arranged to transmit three-phase AC power from the surface power source (not shown). For example, the three phase alternating current may have a frequency of 15 Hz, 30 Hz, and 60 Hz, respectively. In addition, each of the conductors AC energy 94, 96 and 98 may contain the corresponding insulating layers 100, 102, and 104. As mentioned above, the size of the conductor AC 94, 96 and 98 may depend on the transmitted voltage. For example, a line for transmitting an alternating current with a nominal capacity of 10 kilovolts (kV) can be from about 2,54 3,81 to centimeters (1 to 1.5 inches) inches in diameter. Line AC (94, 96, 98) may be made of copper, aluminum or any other conductive material suitable type.

[0046] Unprofitable, when the and requires several conductors of alternating current for transmission of three-phase alternating current to an underwater frequency-controlled drive, as the cable 90 is greatly increased in size, thereby significantly increasing the cost of electricity transmission in the traditional subsea production systems. Further, as mentioned above, the transmission of alternating current over large distances beyond explored space can lead to the formation of potentially unwanted harmonics and reflected signals generated near sensitive underwater equipment, such as conventional underwater VFD, scuba energy consuming device, the gushing wellhead equipment and/or equipment wellhead and/or near the surface (for example, near the surface of the vessel).

[0047] Accordingly, certain aspects disclosed in the present method include the "separation" VFD (for example, 50), which provides a supply of direct current on the surface vessel and passes it directly to the subsea inverter (e.g., 44), which then converts the direct current back into alternating current for actuation of the underwater energy consuming devices of alternating current, such as, for example, a pump, compressor or motor. The transmission of DC can contribute to a cable (e.g., 42) with elektrorazryada connector having a single conductor constant is th current. This significantly reduces the size of the cable with elektrorazryada connector and, consequently, the cost of supply subsea equipment compared to traditional underwater production systems that use cable 90 three-phase alternating current (Fig.5) to operate and supply subsea equipment AC. In addition, because underwater VFD 44 is located relatively close to the underwater energy consuming device 28 AC, alternating current transmitted from the subsea inverter 44 to the energy consuming device 28, is passed at a relatively short distance and, therefore, potentially unwanted harmonics and reflected signals normally associated with the transmission of alternating current over large distances, reduced or eliminated.

[0048] Before continuing, it should be noted that, in accordance with another aspect of the present disclosure of the subject invention, an existing cable 90 three-phase alternating current can be modified for use with at least one separated by a frequency-controlled drive 50. For example, three power wires in the cable 90 can be switched to connect to at least one surface by a constant current source, such as a rectifier 38 and filter 40 posto the current frame. For example, the conductors 94, 96 and 98 can be upgraded so that each was supplied direct current from the component surface of the filter 40 DC. Each of the conductors 94, 96 and 98 can be further upgraded for connection with the corresponding underwater inverter 44 and to be made with the possibility of transmission of direct current to each respective subsea inverter 44. In other words, if an underwater production system or system of mining is already equipped with cable 90 three-phase alternating current, at least one of the divided variable frequency drive 50 will provide for the replacement of conventional VFD, which can be located exclusively under water or entirely on the surface vessel, as described above. Then, using the existing three conductor cable 90, mono pass a constant current is already three underwater inverters 44 a manner similar to that shown in Fig.4C implementation variant of the present invention.

[0049] Refer now to Fig.6A, which shows an embodiment of the cable 42 in accordance with features of the present invention, shows in perspective. The cable 42 may be used in the subsea system 10 production, as shown in Fig.1, and may contain line 56 DC. As noted you the e, line 56 DC can be designed to transmit direct current from the filter 40 DC to the subsea inverter 44. The subsea inverter 44 may then convert the direct current transmitted over the power line 56 DC to alternating current (for example, 60), which can be used to actuate the at least one underwater energy-consuming device (e.g., 28), AC. Further, as mentioned above, line 56 DC, is designed to transfer a specific voltage, usually shorter than the transmission line AC. For example, if the line 56 DC is designed for the transmission of 10 kV, line 56 DC may be approximately from 1.27 to 1.9 centimeters (0.5 to 0.75 inches) in diameter and may also require less insulation than comparable transmission line AC, for example, a transmission line AC 94, 96 and 98, shown in Fig.5. In the shown embodiment, line 56 DC can be located in the insulating layer 108. Along the line 56 DC and the corresponding insulating layer 108 may be enclosed in an outer insulating layer 110 of the cable 42. In another embodiment of the invention, the insulating layer 108 may not be present, and, instead, line 56 DC can the t to be isolated solely due to external insulating layer 110 of the cable 42. As mentioned above about the AC line 94, 96 and 98, line 56 DC may be made of copper, aluminum or any other conductive material suitable type.

[0050] Fig.6B shows a view in section, illustrating an alternative embodiment of the cable 42. In particular, Fig.6B illustrates the cable 42, which may be used in the circuit 77, as described above with reference to Fig.4A. For example, the cable 42 may contain line 56 DC and line 80 reverse current. As line 56 DC, and line 80 reverse current may have respective insulating layers 108 and 112. Line 56 DC, line 80 reverse current and their respective insulating layers 108 and 112 may be enclosed in an outer insulating layer 110 of the cable 42.

[0051] Fig.6C illustrates another embodiment of the invention, in which the line 56 DC and the control line 20, as discussed above in Fig.1, enclosed in the cable 42. As mentioned above, the control line 20 may be provided for transmitting control signals to the subsea controller or control unit 18, which can be used to manage multiple underwater components, for example, gushing wellhead 16 and scuba inverter 44. In particular, the management of underwater inverter 44 by the controller 18 may predusmatrivaet the adjustable control underwater energy consuming device 28 AC. For example, when scuba energy consuming device 28 AC is a three-phase asynchronous motor, it can be started slowly and gradually increase to the desired speed. In addition, it should be noted that the control line is usually made with the possibility of transmission of stresses, which are significantly lower than those transmitted through the power line 56 DC. For example, the control line 20 can transmit voltage is approximately 10-30 volts DC. In one embodiment of the invention the control line 20 can transmit a voltage of about 24 volts DC. In contrast to this line of DC can be configured to transfer a voltage of the order of hundreds of volts or even kV, such as about 10 kilovolts. As can be seen, and the line 56 DC, and the control line 20 can be enclosed in an appropriate insulating layer 108 and 114, and they can be further enclosed in an outer insulating layer 110 of the cable 42. The control line 20 may include, for example, copper, aluminum or fiber-optic cable. In addition, although not shown in the present embodiment of the invention, it should be clear that the cable 42 may also contain additional non-electrical lines, such as hydraulic is the turn and chemical lines. For example, the disclosed embodiment of the cable with elektrorazryada connector shown in Fig.6C, can contain any number of lines of power transmission DC circuits circuit, hydraulic lines, control lines, lines, injection of chemical products and so on, For example, embodiments of the cable 42 can be provided 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 or more of each of the transmission lines DC circuits circuit, hydraulic lines, control lines, or lines injection of chemicals, or a combination of both.

[0052] Fig.6D illustrates another variant embodiment of the cable 42, in accordance with features of this technology. In particular, the cable 42, shown in Fig.6D, can be used in the circuit 79 shown in Fig.4C. Illustrated cable 42 has an outer insulating layer 110, which may contain power lines 56a and 56b. Each of the lines 56a and 56b DC transfer may contain the corresponding insulating layers 108A and 108b. As described above with reference to Fig.4C, power lines 56a and 56b can be used to transfer DC power from the respective surface components 36A and 36b. Surface components 36A and 36b can be part of the first and second variable-frequency drives, respectively. A constant current is passed through power Lin the holes 56a and 56b, can be obtained underwater inverters 44a and 44b, respectively, and converted into alternating current to actuate the associated offshore energy consuming devices 28a and 28b. Thus, an embodiment of the invention shown in Fig.6D, is intended to illustrate the implementation, in which the cable 42 includes one power supply line at a constant current for each of the underwater energy consuming device, powered by an alternating current in the subsurface system 10 for production.

[0053] As mentioned above, one advantage of the present invention refers to a higher transmission efficiency of DC energy compared to the energy transfer AC. In particular, the efficiency of energy transfer alternating current generally decreases with increasing transmission distance. Thus, in underwater applications, where energy is transferred over relatively large distances, for example for hundreds of miles, the transmission of AC energy is often at a disadvantage, due to the high percentage of losses in the line.

[0054] In contrast, the transmission of direct current, as a rule, more effective due to the lack of complex impedance associated with the transmission of AC energy and, in particular, energy polyphase alternating current. For example the and refer to Fig.7, where shows a graph 120 comparison of the efficiency of the transmission of DC energy compared to the energy transfer alternating current at constant voltage. Refer first to the curves 122, 124 and 126, these curves can represent the efficiency of the transmission power of three-phase alternating current transmitted at frequencies of 15 Hz, 30 Hz and 60 Hz, respectively, in the range from 0 to 700 km (X-axis of the graph 120) from the primary energy source of alternating current at the surface (e.g., source 34 on the surface vessel 12). As mentioned above, the lower frequency AC energy can to some extent be slightly improve transmission efficiency. For example, as shown in graph 120, the transmission of AC energy at 15 Hz (curve 122) is more effective in comparison with energy transfer AC at 30 Hz (curve 124) and at 60 Hz (curve 126). However, compared with the transmission of direct current (curve 128) at comparable voltages, transmission efficiency (e.g., the Y-axis of the graph 120) for each of the curves AC 122, 124 and 126 decreases significantly with increasing distance from the surface of the source 34 AC energy. For example, in the range of a distance of approximately 100 to 300 kilometers, the efficiency of energy transfer three-phase alternating current is reduced to approximately 60 percent or less. In addition, when distance and approximately 500 km, transmission efficiency AC energy is additionally reduced to less than 20 percent.

[0055] For comparison, the power transmission direct current at constant voltage, as shown by the curve 128, is much more effective than sending AC energy, even at large distances beyond explored space. For example, as shown by the curve 128, when the destruction beyond the explored area of about 300 kilometers, the transmission efficiency of the DC voltage exceeds at least 90 percent. On the destruction beyond the explored area of approximately 700 kilometers, the efficiency of the energy transfer constant voltage decreases slightly, but still remains relatively high and is approximately 85-90 percent efficiency, compared with the curves 122, 124 and 126 energy AC can transfer with an efficiency of only about 10 percent at the same distance. Thus, to actuate the same underwater energy-consuming device with alternating current, the same distance beyond explored space, must be given much more power AC to compensate for inefficiencies and losses in the line, which may occur during transmission of alternating current.

[0056] As noted above, disclosed in this image the shadow methods can provide a number of advantages compared to traditional applications subsea. For example, by using a divided variable frequency drive, which on the surface vessel produces a constant current and is transmitted to the subsea inverter, electric power transmission, generally much more efficient than the transmission of alternating current from the AC source from the surface to the subsea frequency-controlled drive (for example, if all of rectifying, filtering and inverting components are located under water) or from the surface of a VFD to an underwater energy-consuming device (for example, if all of rectifying, filtering and inverting components are located on the surface). Further, as mentioned above, the cables elektrorazryada connector to transmit under water energy DC, as a rule, smaller and more cost effective than traditional cables with elektrorazryada connector to transmit under water AC energy to operate and power supply equipment AC. For example, one line DC can replace three separate conductor AC power required for transmission of three-phase alternating current on traditional cables with elektrorazryada connector. In addition, because underwater inverter (e.g., 44) is otnositelno close to power underwater energy consuming device AC (for example, 28), the alternating current transmitted from the inverter to the energy consuming device, is transmitted at a relatively small distance, thereby reducing or eliminating potentially unwanted harmonics and reflected signals normally associated with the transmission of AC energy over long distances. In addition, since only the inverter as a component separated variable frequency drive is under water, the number of underwater electronic components is reduced. As will be understood, this may allow you to successfully reduce the heat dissipation from the scuba equipment used in the subsea production system, as well as to simplify the retrieval, inspection, maintenance and/or repair of such equipment.

[0057] Although the invention permits of various modifications and alternative forms, specific implementations of the present invention as an example have been shown in the drawings and described in detail herein. However, it should be understood that the present invention should not be limited to the specific forms disclosed here. On the contrary, the present invention should cover all modifications, equivalents and alternatives included in the nature and scope of the present invention defined by the following formula of the present invention.

1. The system is La actuation of underwater energy consuming devices, powered by an alternating current, comprising:
underwater inverter made with the possibility of the location under water and receiving of DC energy transferred from the surface of the vessel specified system,
when this inverter is made with the possibility of conversion of DC energy to AC electric power for actuating at least one underwater energy consuming device and electrically connected to the cathode surface and components located on the surface vessel, electrically connected to the anode, made with the possibility of location beneath the water,
moreover, the anode and cathode form a channel of the reverse current through the seawater, and the inverter is configured to provide the energy of the three-phase alternating current for underwater energy consuming devices on the managed frequency based on the control effects of underwater control module.

2. The system under item 1, in which indicated at least scuba energy-consuming device includes at least one of the following: pump, compressor, motor, AC motor, multi-phase pump motor, pump motor pumping sea water pump-motor system separation or a combination of both.

3. The system under item 1, in which indicated at least one on the water-energy-consuming device contains a lot of underwater energy consuming devices, the system itself contains the power distribution system, configured to receive AC energy from the specified inverter and its distribution to ensure actuation of each of the sets of underwater energy consuming devices.

4. The system under item 1, containing:
power source AC made with the possibility of the location on the surface vessel; and
the rectifier is made with the possibility of the location on the surface vessel;
moreover, the energy source of alternating current is arranged to supply power AC to the rectifier, and the rectifier configured to convert AC energy into DC current power.

5. The system under item 4, which by means of the filter constant current is provided to filter the energy of the direct current converted by the rectifier to its submission to the inverter.

6. The system under item 5, in which the anode is connected to the rectifier or filter DC on the surface vessel.

7. The system under item 4, in which the energy source of alternating current made with the possibility of power supply three-phase alternating current.

8. The system under item 1, in which the secured transfer of approximately 7 to 10 kV to the inverter, which is made with the possibility of energy conversion DC to power the s AC power approximately 2-5 MW for actuation of the specified at least one underwater energy consuming device.

9. The system under item 1, in which the inverter is enclosed in an underwater housing that contains the interface to retrieve the inverter out of the water.

10. The system under item 1, which contains a system for underwater mining.

11. System for actuation of underwater energy consuming devices, powered by alternating current, comprising:
the rectifier and filter DC made with the possibility of the location on the surface vessel and supplying energy to the DC remotely located underwater inverter
power source AC made with the possibility of the location on the surface vessel and the power supply alternating current to the rectifier;
moreover, the rectifier configured to convert the submitted AC energy into DC current power; and
filter DC performed with filtering of DC energy before filing for underwater inverter
moreover, the inverter configured to convert the energy of the DC to the AC electric power to actuate the at least one underwater energy consuming device and provide the energy of the three-phase alternating current for underwater energy consuming devices on the managed frequency based on the control effects of p is dagnogo control module.

12. System on p. 11, in which the supplied AC electric power is the energy of the three-phase alternating current.

13. System on p. 11, in which energy DC filed on underwater inverter using power line DC, enclosed in a cable with elektrorazryada connector.

14. System on p. 11, in which the underwater inverter configured to convert the energy of the DC to AC electric power for actuation of the underwater energy consuming device.

15. The method of actuation of underwater energy consuming devices, powered by an alternating current, including:
power supply AC to the rectifier circuit using a power source of alternating current, located on the surface vessel;
conversion filed with AC energy into DC current power using a rectifier circuit located on the surface vessel; and
the energy transfer from the DC to the inverter is located under the water away from the surface of the vessel and configured to convert the transmitted energy DC to AC electric power for actuating at least one underwater energy consuming device and electrically connected to the cathode of the
and surface components located on the surface vessel, electrically connected to the anode, made with the possibility of location beneath the water, and the anode and cathode form a channel of the reverse current through the sea water on the surface vessel,
this inverter provides the energy of three-phase AC for underwater energy consuming devices on the managed frequency based on the control effects of underwater control module.

16. The method according to p. 15, comprising filtering power DC filter DC located on the surface vessel, to transfer energy DC inverter.

17. The method according to p. 15, in which the power transmission DC includes the transfer voltage in the range from about 1 kV to 10 kV.

18. The method according to p. 15, in which the energy of the direct current passed to the inverter using Explorer, DC, enclosed in a cable with elektrorazryada connector.



 

Same patents:

FIELD: oil and gas industry.

SUBSTANCE: system contains at least one modular shaft with the central unit placed under water and an uprise buried to the ocean bottom and at least one air-lock chamber to transport duty shifts of workers, materials and equipment. Besides the system comprises at least one drilling area with a horizontal tunnel branched from the uprise in the central unit, and an inclined area for delivery of drill pipes and a vertical area in which bottom part there is a wellhead of at least one well. A power cable and control systems as well as pipeline in the protective shell for oil and gas transportation are connected to the modular shaft.

EFFECT: increasing development efficiency of subsea oil and gas deposits.

9 cl, 56 dwg

FIELD: construction.

SUBSTANCE: method includes deepening and installation of an underwater part of the structure into bottom deposits, fixed fastening of a hollow board to it, made in the form of a ball segment with perforated surface. During assembly of the board its upper part is placed above the surface of the ice cover, and the base is submerged into water. Supply-and-exhaust shafts and tight hatches are placed into the cavity of the board. The underwater part of the platform is equipped with transition gateways and joint assemblies. A tunnel is installed from the platform to the coast, and in it they install a pipe canal, tight partitions, additionally it is equipped with transition gateways, joint assemblies. The tunnel is used as a permanent transport link and moorage for underwater vessels.

EFFECT: increased reliability of operation of hydraulic engineering structures of island type in Arctic seas.

1 dwg

FIELD: transport.

SUBSTANCE: self-moving drilling ship has hull made capable to rotate relative to turret mounted in it with vessel mooring system, deck, accommodations, drilling well under turret, technological drilling facilities and drilling rig with drill string passing through turret and well placed on the main deck, propelling-steering complex, power plant located in the hull. Drilling rig with underrig space, technological drilling facilities, deck walkways and accommodations of vessel are winterized - protected against adverse environmental conditions by safety cages with heating system. Around lower part of drilling well, ring-shaped guard is installed to prevent ice entering. Turret, drilling well and drilling rig with drill string are located in fore part relative to midship section, and accommodations are located in aft part of vessel. The vessel is provided with helicopter deck, system for personnel safe emergency vessel escape in icy conditions, as well as with dynamic positioning system.

EFFECT: improved operational characteristics of drilling ship during prospecting and exploratory drilling on arctic shelf.

1 dwg

FIELD: oil and gas industry.

SUBSTANCE: platform consists of a cylinder-shaped semisubmersible hull placed vertically above and below the sea level. The platform hull has a concave part, which reduces its cross-section area. The concave part is formed discretely at the outside peripheral surface of the platform hull, at that the depth of the platform submersion is regulated so that in extreme sea conditions the water line is at the concave part level.

EFFECT: preventing vertical resonance of the platform in extreme sea conditions due to increase of free oscillation period for the platform heaving.

7 cl, 5 dwg

FIELD: mining.

SUBSTANCE: method comprises use of marine technological complex comprising an offshore platform, subsea satellites and coastal technological base interconnected by technological communications. The drilling process is resupplied with robotic means of oil spill response at all possible stages of an emergency process. The wellbore fluid is pumped to the onshore processing facilities made in the form of a group of interconnected underground tanks. When pumping the wellbore fluid the energy of terrastatic pressure is used, if necessary, using the booster compressor station. Disposal of oil-field water is carried out by the method of geological purification by pumping into the absorbing deep ground, and only in case of critical terrastatic pressure drop is heated and used as liquid washing oil from the rocks of the productive formation. All the technological units of marine technological complex are supplied with electricity from the power unit of a nuclear reactor. The objects of the coastal technological base are electrically connected to the power unit of the nuclear reactor by means of the power cable.

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2 cl

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to deep water drilling oil and gas platform designed for operation at arctic shelf. Semi-submersible catamaran-type drilling platform is arranged at two pontoons, platform hull being supported by stabiliser columns and tensioned vertical mooring, with computer-aided dynamic positioning with the help of underwater propulsors. Surface deck superstructures are composed of drilling, processing, power production and functional modules. Integrated control and safety systems are equipped with production equipment conditions monitoring means and emergency elimination means to actuate by remote means at well fluid flowing the device of static electricity charges elimination at drilling platform.

EFFECT: higher survivability of drilling platform at well fluid flowing.

5 cl

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to compensators for vertical displacements of sea platform caused by roll. Device 100 serves to damp the forces between two interconnected parts in pipe string. Bottom part 101 is connected with top end of string element 105, 3a extending into underwater well 5. Top part 103 is suspended from self-floating surface plant 1 with the help of suspension element 3b extending to said surface plant. Device 100 is arranged pipe string above element 3a extending into said underwater well and above at least one part of said suspension element 3b. Device 100 comprises top and bottom sections 109, 111. Said sections can vertically displace relative to each other to cause pliancy to impact forces between said interconnected top and bottom parts 103, 101. Said impact forces are caused by roll of suspension elements 3b displacing relative to string element 3a.

EFFECT: efficient damping and protection of thread extreme turns.

15 cl, 7 dwg

FIELD: construction.

SUBSTANCE: underwater structure (US) operates at depth in the range from 100 to 120 m from sea level. At the same time the US comprises a support-bearing underwater complex and a drilling complex or a production complex. The support-bearing underwater complex includes a support-bearing plate and a wellhead complex. The support-bearing plate, in its turn, comprises a wellhead block, an energy block, a residential block, and also a life support block, internal and external circular corridors, radial transitions, sectioned ballast pontoons of circular shape and propelling agents. Retention of the underwater structure in the vertical position at the specified point for the whole period of stay is provided by control of filling of ballast pontoon sections, at the same time retention in the horizontal plane is done due to operation of the propelling agents. The inner surface of the body of the drilling complex and the production complex is congruent to the external surface of the wellhead complex, and the lower surface of the body of the drilling complex and the production complex is congruent to the upper surface of the support-bearing plate.

EFFECT: increased safety, reliability and quality of performed works.

13 cl, 5 dwg

FIELD: oil and gas industry.

SUBSTANCE: submerged structure operates at a depth within the range of 70 up to 120 m of the sea level. At that the base of the submerged structure is represented by a circular bearing plate/deck with process modules in the form of sectors; wells are located in the centre of the circular bearing plate/deck in the mouth module. At the base around the mouth modules in the sectors there are free moving vertical modules: living, drilling, operational, processing, power supply and conditioning ones. Inside the base of bearing plate/deck around the mouth module there are corridors: an inner and outer, at that the inner and outer corridors are interconnected by mutually perpendicular passages. Between the inner and outer corridors there is a circular ballasting container; under the outer corridor there are mutually perpendicular electric propulsion units. The method ensures operation of the above universal submersible structure.

EFFECT: improving safety and quality of performed operations both in process of well drilling and operation.

11 cl, 5 dwg

FIELD: oil and gas industry.

SUBSTANCE: device includes pipeline (24) for transfer of fluid medium, tower (16), floating barge (18) installed so that it can be turned around tower (16) about rotation axis (A-A'). Pipeline (24) includes section (150) of a hose, which is wound about rotation axis (A-A') and retained with intermediate structure (20) installed between tower (16) and barge (18) between a configuration of joint rotation together with barge (18) about the rotation axis and a configuration of retention with tower (16) during rotation about rotation axis (A-A'). At the stage of connection of pipeline (24) intermediate structure (20) is installed into one of the configuration of rotation or retention; with that, the disconnection stage of pipeline (24) includes a transition piece of intermediate structure (20) to the other configuration of either rotation or retention.

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18 cl, 12 dwg

FIELD: pipeline.

SUBSTANCE: invention relates to the flexible ascendant pipelines designed for working in waters encumbered with ice. The ascendant pipeline is equipped with the protection device against the shock caused by waves and drifting ice. The protection device covers at least the upper part of the pipeline and can be removed to the non-operation position at the sea bottom or on board. The protection device is formed by the multitude of separate hollow elements of the blunt-nosed cone shape, which are hanged to one another with chains or wire ropes. When the pipeline is in the removed position, the separate hollow elements can be laid one atop another. The protection device must protect at least the upper part of the ascendant pipeline going from the sea bottom to the floating vessel.

EFFECT: creating the protection device for flexible ascendant pipelines used in waters encumbered with ice.

16 cl, 6 dwg

FIELD: transport.

SUBSTANCE: flexible pipeline or hydrocarbons transportation system between the installation, located on the seabed and the vessel on the sea surface. Uprise pipeline is equipped with a device for its protection against impact which closes at least the top of the uprise pipeline. The device to protect the uprise pipeline is formed by flexible element and a multitude of individual hollow components, each of which is suspended on chains or ropes. This device is equipped with tensile or tightening devices, which is preferably attached to the lower end of the device to protect the uprise pipeline.

EFFECT: protection of upper part of uprise pipeline.

13 cl, 8 dwg

FIELD: mining.

SUBSTANCE: invention relates to development of offshore deposits of hydrocarbons and is intended for technical servicing of deposits with many places of dislocation of subsea wells (SW), each of them having one or several SW. The system includes a floating vessel, which can be transferred from one place of dislocation of SW to another place of dislocation of SW and two separate systems: one system to perform operations in the place of dislocation of SW, such as power supply, data transmitting and a system of underground servicing intended for underground servicing of a certain SW, such as repair servicing and operational servicing. The operational system can provide control of SW and other subsea equipment either in the first or in the second place of dislocation of SW irrespective of the position of the vessel.

EFFECT: provision of repairs and servicing of subsea equipment or separate subsea wells.

28 cl, 5 dwg

FIELD: electricity.

SUBSTANCE: invention relates to electric engineering and may be used for well operation with pumping units to supply power to remote electric arrangement. Power supply system includes AC-DC voltage transmitter connected with AC voltage supply to transmit AC voltage into high DC voltage in the first point. AC-DC voltage transmitter includes great number of AC-DC transmitter components which are parallel connected with AC voltage supply at their inputs, and serially connected with electrical conductor at their outputs. Electrical conductor is routed to a great number of voltage transmitters in remote point and their inputs are serially connected with electric conductor, while their outputs produce proper voltage for electric arrangement.

EFFECT: improvement of power supply system performance indicators.

53 cl, 38 dwg

FIELD: transport.

SUBSTANCE: when a vessel is moored to the submersible turret buoy, the vessel is brought above the submersible upward pipeline fitted with the turret buoy. The upward pipeline with the turret buoy is pulled upwards up to engagement with the appropriate on-board equipment. Then a protection device covering the upward pipeline and protecting at least its upper part is pulled out. The upward pipeline and its protection device can be completely retracted to the inoperative underwater position using the protective structure.

EFFECT: creation of the protection system for the upward pipeline laid between sea bottom and the vessel, of the method for vessel mooring to submersible turret buoy in waters tight with ice and of the system, in which loading system can be quickly retracted in a completely protected underwater position.

10 cl, 7 dwg

FIELD: oil and gas industry.

SUBSTANCE: invention refers to engineering equipment for development from wells of such natural resources of World Ocean as oil and gas as well as other minerals form gravel sub-sea deposits. The complex for development of sub-sea deposits of minerals consists of an assembly frame either on a mother ship in the open sea, on an island or on shore; the frame is designed for fabrication, test and launching pressure tight chambers with equipment installed therein. Pressure tight casings with pipelines and casings with power and control cables are connected with chambers. Also the head part of the complex is transferred in submerged position from the site of assembly frame to the specified coordinates of the sea bottom by means of alternate switching on maneuvering devices of pontoon blocks; the length of transport system of the complex is being gradually increased by means of addition of the next sections inside the assembly frame. To maintain the course of complex traveling not less, than two submarines are used which are continuously coupled with the head part of the complex.

EFFECT: increased reliability of complex operation.

1 dwg

FIELD: oil and gas industry.

SUBSTANCE: group of inventions refers to oil and gas industry, particularly to installation of technological assemblies on the sea bottom. The method consists in lowering the technological assembly, in introducing its first end into a receiving device, when a lower end is temporary formed out of the said first end, in maintaining the first end in the receiving device, and in lowering the second end of the technological assembly bringing the end into a horizontal position from a vertical on the sea bottom or on a module foundation. The first end of the assembly is left supported with the receiving device; a rotation axis is formed for the first end. The group of inventions also includes the method of retrieval of the assembly from the sea bottom and the receiving device for assembly handling and its implementation.

EFFECT: increased efficiency of installation-retrieval operation and of process of blow-out and cleaning of technological assembly.

26 cl, 22 dwg

FIELD: oil and gas production.

SUBSTANCE: sections of pipes (52, 54) are connected successively and are supported vertically relative to floating vessel (12) to assemble section of column (68B-68D); this section is immersed into sea so, that nearest end (56) of section rests on floating vessel. Towboat (30) stretches out the section of the column along a doubled chain line by means of hauling in towing cable (34) connected with further end (65) of the column. When further end of the column is situated near one of the borehole of underwater wells of the oil deposit, this end is transported for connecting it to the borehole using a transport vessel with remote control. During assembly tension in the pipe column is maintained at a required level by facilitating location of the section of the nearest end of the column, which is below floating vessel (12), so, that the column is stretched at angle (70) to vertical, which continuously stays within the preliminary set interval from 3 to 12.

EFFECT: invention facilitates pipe-lay avoiding damage of pipe sections and simultaneously reduces operational costs.

8 cl, 5 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: complex contains a sea platform, a production well and a water injection device, containing a pump, which outlet connected to the injection well and a electro-generator. According to the invention a heat exchanger connected after the pump by the water line, installed in a gas-turbine drive exhaust device, then a double shaft gas-turbine motor with an external and an internal shafts, and a Sterling motor connected to the double shaft gas-turbine motor with one of the shafts. The same shaft connected to the pump, and another one - with electro-generator, connected electrically with the hydrocarbons pump drive. In front of the Sterling motor installed an additional combustion chamber, and in front of the heat exchanger inside of the exhaust device - the second combustion chamber. The double shaft gas-turbine motor contains an air intake, a compressor, the combustion chamber and a turbine. The motor fuel system connected to combustion chambers, it contains a fuel pump with a drive, a flow regulator and shut off valves.

EFFECT: complex reliability increase and reservoir pressure increase, better hard hydrocarbons heating for their melting and evaporation.

3 cl, 4 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: complex contains a sea platform, a production well and a water injection device, containing a pump, which outlet connected to the injection well and a electro-generator. According to the invention a regenerative heat exchanger connected after the pump by the water line, installed in a gas-turbine drive exhaust device, and a heat exchanger cooler. A gas-turbine drive contains double shaft gas-turbine motor, with an external and an internal shafts, a compressor, a combustion chamber and a turbine with cooling system and a Sterling motor. The Sterling motor connected to the double shaft gas-turbine motor with one of the shafts. The same shaft connected to the pump, and another one - with electro-generator, connected electrically with the hydrocarbons pump drive. In front of the Sterling motor installed an additional combustion chamber. The heat exchanger-cooler by the air line connected between the compressor outlet and the turbine cooling system collector.

EFFECT: complex reliability increase and reservoir pressure increase, better hard hydrocarbons heating for their melting and evaporation.

3 cl, 4 dwg

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