Generator


H02K9/24 - Protection against failure of cooling arrangements, e.g. due to loss of cooling medium, due to interruption of the circulation of cooling medium (circuit arrangements affording such protection H02H0007000000)

 

The invention relates to the field of drilling and can be used to supply electric power to the downhole tools. The generator includes a device for fastening the outer rotor with turbine mounted through the bearing on the axle, at the same time which made the inner stator. External rotor and internal stator form a cavity, in which the possibility of axial movement set the compensator pressure and thermal expansion lubricating fluid made in the form of a piston, compressed by the rotor and the axis. The piston is sealed along the axis of the rubber reinforced cuff mounted inside the pressurizer thermal expansion of the lubricating fluid with the possibility of axial movement with the piston. On the axis in the range of movement of the piston can be fitted with removable sleeve, which can be fixed against rotation. Near rubber reinforced cuff may be equipped with additional rubber reinforced cuff, while the elastic elements of both cuffs are turned in opposite directions to form between them a cavity. The cavity between the rubber reinforced cuffs can be filled with grease. Izobrasheniia its design. 4 C.p. f-crystals, 3 ill.

The invention relates to technology for drilling wells for oil, gas, and for other purposes. Specifically the invention is intended to convert the energy of the drilling fluid in electrical and power electricity Autonomous downhole navigation and geophysical instruments in the drilling process.

Known AC generator to power the Autonomous downhole during drilling of small diameter, comprising a stationary inner stator with header and fixed on the drive shaft of the external rotor, equipped with electromagnets (RF patent No. 2060383, MCP E 21 In 47/022, 47/00, priority from 21.02.92 year).

Known Autonomous turbine unit containing a turbine driven by the flow of drilling fluid, oil flooded the stator is filled epoxy compound, and the rotor of the alternator with permanent magnets located on the same shaft with the turbine. (Molchanov, A. A., Shiraev A. X. Downhole Autonomous system with magnetic registration. M.: Nedra, 1979, S. 102-103).

This generator consists of a stator, placed inside the unit, and a six-pole correctamente turbines. Before each stage of rotor blades of the turbine, in turn, has three stage guide vanes collected in an external enclosure that increases the diameter of the device. To prevent the ingress of drilling fluid into the generator and bearing assemblies installed sealing device, the internal cavity of the generator is filled with transformer oil.

Due to the fact that the generator operates in the temperature range from - 40 to +130°C at a depth of drilling up to 3500 m and more, and the volume of oil changes with changing temperature, put the pressure compensator and thermal expansion of lubricating fluid (oil). The compensator pressure and thermal expansion lubricating fluid made in the input fairing generator. It consists of two thin core plates, one of which is convex and the other concave. The compensator pressure and thermal expansion of lubricant is designed to compensate for changes in the volume of oil in oil-filled cavity of the generator in operating conditions when the temperature and pressure inside and outside of the generator.

The disadvantages of this generator are: low reliability, mA is first of all, the fact that the drive uses a multistage turbine with guide devices. The use of turbines with the alignment apparatus as actuator imposes high requirements to the quality of cleaning mud from fractions of drilling cuttings and other foreign objects, ingress of which the gap between the workers and the guide blades of the turbine may cause the system to stop (jamming). The presence of the guide vanes of the turbine increases the diametrical dimension of the generator, which is not desirable when drilling relatively small diameter.

The second design flaw is the complexity and unreliability of the pressure compensator and thermal expansion of lubricant. Due to the elasticity of the walls of the compensator pressure of lubricant is always less than the ambient pressure. This can lead to the ingress of drilling fluid into the lubrication system of the generator and to the wear of bearings, seals and other parts.

Also known generator according to U.S. Pat. Of the Russian Federation No. 2173925 (prototype). This generator contains a device for fastening the outer rotor with turbine housing, the stator axis installed on under the I and thermal expansion of the lubricating fluid, posted by devices for fastening, made in the form of a piston mounted for axial movement and seal, this seal is made a face and set the bearing.

The disadvantage is a small resource generator, due to wear of the mechanical seal. Resource seals is about 100 hours under favorable conditions, defective Assembly or defects in the o-rings it can fail almost instantly, which will lead to the termination of downhole telemetry system and cost chute-lift operations.

Objectives of the invention are to increase the life and reliability of the generator. This is achieved through a new layout generator.

These tasks are achieved due to the fact that the generator containing the device for fastening the outer rotor with turbine mounted through the bearing on the axle, at the same time which made the inner stator, an outer rotor and an inner stator form a cavity, in which the possibility of axial movement set the compensator pressure and thermal expansion lubricating fluid made in the form of a piston, sealed inside of a pressurizer thermal expansion lubricating fluid, with the possibility of axial movement with the piston. On the axis in the range of movement of the piston is fitted with removable sleeve. The removable sleeve is fixed against rotation. Near rubber reinforced cuff installed additional rubber reinforced cuff, while the elastic elements of both cuffs are turned in opposite directions to form between them a cavity. The cavity between the rubber reinforced cuffs filled with grease.

The proposed solution has novelty, inventive step and industrial applicability, i.e. all criteria of the invention. The presence of inventive step is confirmed by the patent research, new layout seals and compensator of thermal expansion of the lubricating fluid. For the manufacture of all nodes of the generator does not require scarce materials and newly developed technologies.

The invention is illustrated in the drawings (Fig.1-3), where Fig.1 shows a generator of Fig.2 - rubber reinforced cuff of Fig.3 - two rubber reinforced cuffs.

The generator (Fig.1) contains a device for fastening of the generator 1, the outer rotor 2 with the turbine 3 and the casing t is mperatures expansion lubricating fluid 10, which is made in the form of a piston 11 that is installed with the possibility of axial movement, and spring-loaded by a spring 12. The spring 12 abuts against the retaining ring 13. On the axis 6 with no gap installed sleeve 14 fixed pin 15 and the densified relative to the shaft sealing ring 16. Inside the pressurizer thermal expansion of the seal 10 is installed in the form of a rubber reinforced cuff 17. The elastic element 18 rubber reinforced cuff 17 is directed in the direction opposite from the support 1 (Fig.2). Extra cuff 19 (Fig.3), with the elastic element 20 is directed toward the support 1. Cavity From between the sleeves 17 and 19 are filled with grease. Design of reinforced rubber cuff 17 is combined with the design of the compensator pressure and thermal expansion lubricating fluid 10 in one node. Cuff reinforced rubber shaft made according to GOST 8752-79, are used to seal rotating shafts and cuffs for a hydraulic device according to GOST 14879-74 designed for shaft seals in the progressive movement. The peculiarity of the seals in the form of a rubber reinforced cuff 17 is that it simultaneously performs about the considerable translational movement of the seal in the form of a rubber cuff is connected with the firstly, the temperature of the lubricating fluid is changed in a wide range from negative to +110°C, while supply of lubricant is gradually consumed in the environment (mud).

At one end of the generator made the node 21, which includes a tube 22 with a seal 23, the nozzle 24, the ball 25, the spring 26, the hole b On the other end has a lug 27, the wires sealed curly cuff 28. The tip 27 contains electrical contacts 29 and on the outer cylindrical surface of the sealing ring 30.

The cavity And between the outer rotor 2 and the stator 5 is filled with lubricating fluid.

The device operates as follows. Drilling fluid is supplied to the turbine 3, and the turbine housing 4 and the outer rotor 2 rotates. In the elektroobmotka 7 of the stator 3 occurs EDS. The pressure of the drilling fluid through the piston 10 is passed into the cavity And, as a result, the pressure of the lubricating fluid becomes greater than the pressure of the drilling fluid. The seal 11 is made in the form of rubber reinforced cuff that seals the cavity and, in contrast to the mechanical seal, which was used in the prototype, almost never misses a lubricating fluid to the outside is Irene lubricating fluid seal. This design ensured a constant overpressure in the cavity And, it increases TBO generator about 10 times, which is confirmed experimentally. The presence of an additional rubber seal and grease in the cavity between them improves seals and additionally increases the resource.

The application of the invention allowed:

1. Compared to the previously used mechanical seal to increase the reliability and service life of the generator by providing a pressure lubricating fluid overpressure and exclude the ingress of drilling fluid into the lubrication system, which is confirmed by experimentale.

2. To provide temperature compensation of the expansion of the volume of lubricating fluid.

3. To simplify the design of the generator due to the rejection of the use of guide vanes of the turbine and the maximum simplification of construction of the sealing device.

4. To reduce the size and weight due to the refusal of complex compensator, as well as the use of the turbine without guide vanes.

5. To increase the volume of the pressure compensator and thermal expansion of the lubricating fluid with the same dimensions of the generator.

6. Control the margin-top:2mm;">Claims

1. The generator containing the device for fastening the outer rotor with turbine mounted through the bearing on the axle, at the same time which made the inner stator, an outer rotor and an inner stator form a cavity, in which the possibility of axial movement set the compensator pressure and thermal expansion lubricating fluid made in the form of a piston, compressed by the rotor and an axis, wherein the piston is sealed along the axis of the rubber reinforced cuff mounted inside the pressurizer thermal expansion of lubricant, with the possibility of axial movement with the piston.

2. Generator under item 1, characterized in that the axis in the range of movement of the piston is fitted with removable sleeve.

3. Generator under item 2, wherein the removable sleeve is fixed against rotation.

4. Generator according to any one of paragraphs.1-3, characterized in that next to the rubber reinforced cuff installed additional rubber reinforced cuff, while the elastic elements of both cuffs are turned in opposite directions to form between them a cavity.

5. Generator under item 4, characterized by

 

Same patents:

The invention relates to a method and apparatus for fast relief pressure setting with at least first and second body portion, and the first part of the body in normal condition contains an atmosphere of hydrogen at high pressure, which is separated from the inner space of the second part of the case, with failure of the hydrogen seal gauge pressure of the hydrogen discharge through the line fast descent

The invention relates to the field of electrical engineering, namely, to lubrication systems generators power the downhole equipment

The invention relates to the field of electrical engineering and of electrical engineering and can be applied in the sealing of the shaft of the electric machines, such as turbine generators, used as synchronous compensators

The invention relates to the field of electrical engineering and of electrical engineering and can be applied in the sealing of the shaft of the electric machines, such as turbine generators, used as synchronous compensators

The invention relates to the field of electrical engineering, namely, devices for hydraulic protection submersible oil-filled motor

The invention relates to the field of electrical engineering

The invention relates to electrical engineering and is intended for use in the composition of the electric pump unit used for the production of well fluids from wells of different diameters and depths

The invention relates to electrical engineering and can be used in submersible oil-filled electric motors designed to drive submersible pumps when pumping liquids from wells

Submersible motor // 2206950

The invention relates to the field of electrical engineering and can be used in the construction of hydronamic submersible oil-filled motor with telemetry system designed to operate pumps oil

Device for sampling // 2242607
The invention relates to the oil industry, in particular to devices for sampling of high pressure pipelines, and can be used to control the processes of production, preparation, transportation and storage of oil, oil products and gas, regardless of their rheological properties and the ambient temperature, providing high reliability
The invention relates to the oil industry and can find application in the operation of horizontal and inclined oil-producing and injection wells

The invention relates to the oil industry and can be used to control the operation of oil wells equipped with sucker-rod pumping installations

The invention relates to the oil industry and can be used to control the operation of oil wells equipped with sucker-rod pumping installations

The invention relates to gas industry and can be used to determine the reservoir pressure in the gas and gas condensate wells

The invention relates to the field of electrical engineering, namely, to lubrication systems generators power the downhole equipment

The invention relates to the field of study wells and can be used to quickly identify hidden sources of groundwater contamination in the oil industry
Up!