Generator supplying power for borehole equipment

FIELD: oil and gas industry.

SUBSTANCE: generator, external stator placed in as sealed body, internal rotor installed at the generator shaft with roller bearings in sealed cavity filled with a lubricant coolant and sealing components. At that the generator sealed body is divided into three sealed loops - electrical, kinematic and protective ones. Electric loop of the stator is equipped with an independent compensating diaphragm and filled with cooling liquid and separated from the kinematic loop by a screen made of non-magnet material. Kinematic loop of the bearings is filled with lubricant and separated by a system of cup-type seals and inner diaphragm from the protective loop of an end sealing compensator filled with lubricant in the volume limited by the outside diaphragm. The electrical loop is filled with dielectric cooling liquid without excessive pressure; the kinematic is filled with dielectric cooling liquid without excessive pressure; protective is filled with dielectric cooling liquid under excessive pressure. Besides, the protective loop may be filled with lubricant having higher viscosity and higher boundary tension in comparison with lubricant in the kinematic loop. Zero point of the stator windings is coupled to the body through a plugging contact. The filling system for the protective and kinematic loops has a valve spindle to switch between the filled loops at vacuuming and filling of lubricant. Rigidity of diaphragms in the electric and kinematic loops is higher than the same in the protective loop.

EFFECT: improving reliability of the generator and reducing labour intensity during repair and maintenance operations.

6 cl, 1 dwg

 

The invention relates to the field of Geophysics and is intended to supply electricity to the Autonomous downhole apparatus by converting energy of the flow of washing fluid into electrical energy.

Known AC generator with oil-filled internal cavity containing oil rubber expansion joint and the sealing device of the drive shaft, including mechanical seal (USSR author's certificate No. 1006738, MKI E21B 47/022, publ. 1983).

The disadvantage of this generator is a high probability of failure when running in the hole in the loss of integrity of the mechanical seal, which has a low service life when operating in severe conditions of high pressure, vibration, temperature and abrasion.

Closest to the present invention is the design of the generator described in the patent of Russian Federation №2404370, IPC F03B 13/02, Appl. 27.05.2009. The generator has a sealed body, which houses the outer stator and the inner rotor located on the shaft of the generator. The shaft is mounted in bearings located on both sides of the rotor. The shaft has two sealing devices. A sealed enclosure filled with coolant fluid. The generator consists of two compensating device. The first device is nutricous turbine generator and filled with coolant fluid. The second device is mounted in a housing which closes hermetically sealed generator housing. The first sealing device separates the internal cavity of the first compensator from the mud. The second sealing device divides the inner cavity of the first compensator filled with coolant fluid from the sealed enclosure of the generator, also filled with coolant fluid.

This construction has the following disadvantages:

1. Known generator is characterized by the presence of two consecutive cavities filled with a coolant fluid. However, the joint work of two compensators in their sequential location is only possible at the same flow rate of coolant through the mechanical seal, which is unlikely. Thus, the reality of the two compensators will work only one.

2. Used internal oscillator circuit fluid performs two functions: it lubricates the bearings and cools the generator windings. Usually this is done using the transformer oil, which may not provide optimal performance of two functions. When heated above 120-150°C begins the destruction of the oil, accompanied by the formation of carbon, which leads to the appearance of the conductivity, the lower the resistance the population and turn-to-turn breakdown, or even to a breakdown in the body. On the other side of the transformer oil is not optimal and as a lubricant, since at temperatures above 100°C has a low viscosity and low surface tension.

3. Replacement of bearings carried out for all maintenance and repair work requires complete disassembly of the generator, washing stator windings, desoldering the wires and inputs. Repeated operation of the soldering-desoldering also reduce the reliability of the generator.

The present invention is to improve the reliability of the generator and reducing the complexity of the repair and maintenance work.

The solution of the stated problem is achieved by the fact that the hermetic housing of the generator is divided into three sealed circuit - electrical, kinematic and protective, while the electrical circuit includes a stator equipped with their own aperture-compensator filled with a dielectric cooling liquid and is separated from the kinematic loop shield made of a nonmagnetic material, kinematic circuit includes a rotor mounted on a shaft with bearings filled with lubricating fluid and separated by a system of radial shaft seals and the inner aperture of the protection circuit of the compensator mechanical seals, filled with the lubricating fluid in the volume, limited to the outer diaphragm is mine. Electrical circuit filled with a dielectric cooling fluid without excessive pressure, kinematic path filled with lubricating fluid without excessive pressure, the protective circuit is filled with lubricating fluid pressure. The protective circuit can be filled with lubricating fluid with high viscosity and high surface tension. The zero point of the windings of the stator connected to the housing through the plug-in contact. The filling system protective and kinematic loops contains a valve for switching of filled contours under vacuum and pumping lubricating fluid. The rigidity of the diaphragms electrical and kinematic paths is higher than the rigidity of the outer aperture of the protective circuit.

Figure 1 presents the scheme of the generator. The generator includes a housing 1, with the installed stator 2, separated from the rotor 3 screen 4, made of a nonmagnetic material, and the aperture of the electrical circuit 5. Neutral windings are summed up through the plug contact 6 to the housing 1. The shaft 7 of the rotor 3 mounted in the bearing housing 1 8, rotates the turbine 9 under the action of flow of the drilling fluid. Kinematic loop lubrication of the bearings 8 is separated by a system of radial shaft seals 10 and the inner aperture of the kinematic loop 11 from the protective circuit of the compensator end at which loteria 12. Outer aperture compensator 13 provides for mechanical seal 12 shunting stock of lubricating fluid under pressure.

Protective and kinematic section of the generator is charged through the hole in the shaft 7, a closed tube 14 and the valve 15 that provides consistent filling of the inner and outer contours.

Kinematic loop with bearings 8 filled with lubricating fluid without creating excessive pressure. Depending on the operating temperature, you can use mineral, synthetic or semi-synthetic oil.

Protective circuit mechanical seal 12 is charged with pressure, using the elasticity of the diaphragm compensator 13. As a lubricant, you can use the same oil as in the kinematic path of the bearings. To reduce the rate of oil consumption and extend the service life continuous operation of the generator between the stations can be used more oil with higher viscosity and high surface tension, such as hypoid.

Electrical circuit vacuum and fill through the hole in the body without excessive pressure coolant, resistant to degradation by heat, for example silicone. This eliminates the possibility of breakdown of the stator.

For convenience, the scan gene the operator during the operation and regulation of the zero point of the windings connected to the housing through the plug contact 6, that allows you to test each winding of the generator when it is disconnected.

In operation the drilling fluid flows around the turbine 9 of the generator and causes the rotation of the shaft 8 with the rotor 3. In the windings of the stator 2 is produced electric current. The pressure of the drilling fluid through the outer aperture compensator 13 is transmitted to the inner aperture of the kinematic circuit 11 and the aperture of the electrical circuit 5. Thus, in all three circuits, generator protection, kinematic and electrical, to ensure equality of pressure. The flow of lubricating fluid through the mechanical seal 12 prevents the ingress of drilling fluid containing abrasive particles in the bearings 8.

To reduce the effect of the pulsations of mud on the inner contours of the rigidity of the diaphragms electrical and kinematic circuits 5 and 11 must be higher than the rigidity of the outer aperture of the protective circuit 13.

The design of the generator is highly reliable. The electric circuit of the generator has a triple protection:

- shunting supply of lubricant in the protective circuit of the mechanical seal 12 provides the generator during the flight;

in the case of full flow shunting stock of lubricant and ingress of drilling mud into the protective circuit, a mechanical seal 12 will perform the function of the labyrinth and don't miss the sand particles to the lip seal 10;

- failure of the lip seal 10 and the penetration of the drilling fluid in the kinematic loop also will not lead to failure of the generator and will allow the flight to end, as the electrical circuit is separated from the kinematic screen 4 and the diaphragm 5.

Conducted operational testing of the generator when drilling in different regions. Actual conditions differed in the use of various drilling fluids with different electrical characteristics, high levels of stress and vibration. The generator showed 100% reliable, there was no failure during flight. The resource generator has increased more than twice.

Division of electrical and kinematic loops allows you to replace the bearings without touching the stator. The exception of multiple operations soldering-desoldering wires and inputs reduces the complexity of routine maintenance and repairs and improves the reliability of the generator.

1. Generator to power the downhole apparatus containing an outer stator, placed in a sealed casing, an inner rotor mounted on the generator shaft with the bearings in a sealed cavity filled with coolant fluid, and sealing device, characterized in that the hermetic housing of the generator is divided into three sealed circuit - electrical, kinetic is eticheski and protective, this electrical circuit includes a stator equipped with their own aperture-compensator filled with a dielectric cooling liquid and is separated from the kinematic loop shield made of a nonmagnetic material, kinematic circuit includes a rotor mounted on a shaft with bearings filled with lubricating fluid and separated by a system of radial shaft seals and the inner aperture of the protection circuit of the compensator mechanical seals, filled with the lubricating fluid in the volume bounded by an outer aperture.

2. The generator according to claim 1, characterized in that the electric circuit is filled with a dielectric cooling fluid without excessive pressure, kinematic path filled with lubricating fluid without excessive pressure, the protective circuit is filled with lubricating fluid from the pressure.

3. The generator according to claim 2 characterized in that the lubricating fluid that fills the protective circuit has a higher viscosity and high surface tension compared with the lubricating fluid kinematic loop.

4. The generator according to claim 1, characterized in that the filling system protective and kinematic loops contains a valve for switching of filled contours under vacuum and pumping lubricating fluid.

5. The generator according to claim 1, characterized in that zero is the first point of the windings of the stator connected to the housing through the plug-in contact.

6. The generator according to claim 1, characterized in that the rigidity of the diaphragms electrical and kinematic paths is higher than the rigidity of the outer aperture of the protective circuit.



 

Same patents:

Generator plant // 2524577

FIELD: electricity.

SUBSTANCE: generator plant includes a frame, a power plant, an electric generator mechanically connected to the power plant, which are fixed on the frame, and a thermal control switchboard. The power plant is made in the form of a four-stroke diesel engine, each cylinder of which has an internal partition wall with a central hole, which divides internal volume of the cylinder into two equal cavities. From below, the cylinder is closed with a bottom cover plate with a central hole. One piston is installed inside each cavity of the cylinder. Pistons are connected by means of a stock passed into holes of the partition wall and the bottom cover plate, the lower end of which is connected to a piston-rod connected to a crank of a crank shaft. The partition wall and the pistons with the bottom cover plate form four working chambers in the cylinder, each of which has inlet and outlet units with inlet and outlet valves interacting with cams of the inlet and outlet gas distributing shafts. The inlet unit has an atomiser hydraulically connected to a high-pressure pump connected to the crank shaft. The inlet unit is connected via pipelines to a filter of an air blower and via pipelines through an exhaust fan brought into action by an electric motor, as well as it is connected through an exhaust pipe to atmosphere. The engine also includes a drive mechanism of auxiliary units, a starter generator and the following systems: lubrication, feeding, cooling and start-up.

EFFECT: increasing capacity and efficiency of a power plant; obtaining a larger quantity of electrical power.

1 tbl, 12 dwg

FIELD: electricity.

SUBSTANCE: invention is related to the field of electric engineering, and namely to electric machines and is referred to design of axial inductor electric machines. The suggested axial inductor electric machine with electromagnet excitation contains the stator housing, stator magnet packs, excitation windings, windings of alternating electromotive force, the rotor and rotor magnet packs. According to the invention a cylindrical turbine rotated in a flow of gas or another medium as the rotor shaft is equipped with three geared magnet packs place axially to the stator windings at the outer diameter of the turbine shaft and are shifted per ⅓ of the geared section and without open magnetic-air gap with the stator windings they form the three-phase system of a reversible electric machine. In motor operation one type of control voltage is supplied to the windings of alternating electromotive force in the form of sequential rectangular electrical pulses which duration defines frequency of the rotor shaft rotation.

EFFECT: in motor mode one type of control voltage is used, in generator mode electric energy can be generated using flows of different media and implementing the function of a starter-generator with high shaft torque in a wide range of preset rates, with high mechanic endurance and high degree of protection.

4 dwg

FIELD: electricity.

SUBSTANCE: invention relates to electrical engineering. The electromagnetic device has a stator and a rotor rotating between facing surfaces of the stator and bearing a plurality of magnets distributed at regular intervals along its periphery. The magnets are arranged such that they form a sequence of alternately opposite poles on the surfaces of the rotor directed towards the stator, and the stator comprises two sets of independently supported magnetic yokes located at both sides of the rotor in front of the magnets. The magnetic yokes have two axially oriented arms, the end surfaces of which, when the rotor is in a fixed state, at least partly face a pair of successive magnets on a same surface of the rotor.

EFFECT: high efficiency of the device and providing maximum operational flexibility by adjusting and optimising the position of the stator and the rotor.

25 cl, 28 dwg

FIELD: electricity.

SUBSTANCE: modular electromagnetic device has a stator and a rotor rotating between facing surfaces of the stator and bearing a plurality of magnets distributed with alternate orientations in a substantially annular pattern. The stator comprises at least one pair of magnetic yokes symmetrically located at both sides of the rotor. Each yoke has a pair of projecting arms extending towards the magnets and bearing a respective coil for receiving electric power from or supply of electric power to the electromagnetic device. Each yoke is individually mounted on its own support equipped with adjusting units arranged to adjust the yoke position relative to the oppositely lying magnets. The yoke forms, together with its coils, its support, its adjusting units and measuring and control means controlling the yoke adjustment, an elementary stator cell that can be replicated to form single-phase or multiphase modules.

EFFECT: enabling adjustment and optimisation relative to the stator and rotor position in order to obtain maximum efficiency and maximum operating flexibility of the system.

37 cl, 28 dwg

FIELD: electricity.

SUBSTANCE: method is used to generate electric power to supply automatic controls of pipelines, provision of electric power supply for equipment located outside access areas of permanent power supply. The suggested method is purposed for to implement process of power supply for water supply and disposal systems, gas supply systems, oil pipelines due to use of power from medium flow in the pipeline. Power generated in result of separation of flow part is accumulated in energy accumulator. Thereafter it can be used by means of static converter to supply duty equipment with power comparable to power of turbine and generator and devices with larger power that operate during short period of time.

EFFECT: reducing wear and tear of pipeline system.

1 dwg

Annular generator // 2506682

FIELD: electricity.

SUBSTANCE: invention relates to electrical engineering and may be used in wind-driven power plant. Annular generator of the wind-driven power plant includes stator, peripherical stator ring for placement of stator windings, rotating part which is installed so that it can rotate in relation to stator and lid of the stator connected to stator ring. Lid provides formation of discharge chamber with high or low pressure; it is designed to ensure air flow passing through and/or in stator and/or rotating part in order to cool annular generator. At that in the stator lid there is at least one air blower with opening designed for it. The air blower can be rotated by driving mechanism in order to open the air blower opening for the purpose of maintenance and/or man passage through it.

EFFECT: more effective cooling of annular generator.

14 cl, 22 dwg

FIELD: electricity.

SUBSTANCE: it is proposed to replace counterbalances of a crank gear of a pumping unit with an electric generator of the same weight. The drilling electric generator is installed in a required point of a crank gear with the double purpose: as a pumping unit counterbalance and as an electric generator itself. Together with the crank relative to the generator axis one part of the generator rotates, for instance, a stator with windings of electromotive force induction. The other part of the generator - a rotor developing a magnetic field, remains fixed relative to the generator axis due to shift of its centre of gravity below the horizontal axis of the generator by the value required for free rotation of the stator around the fixed rotor.

EFFECT: expansion of operating capabilities, generation of additional power at a wellhead and its application on site for heating of oil production facilities.

FIELD: transport.

SUBSTANCE: proposed invention serves to drive electric vehicle without recharge from power mains and allows storage battery automatic recharging in vehicle motion. Proposed unit consists of electrogenerating packages to convert vertical oscillations of elastic element assembly coupled with vehicle chassis into electric current for charging storage batteries.

EFFECT: increased haul.

2 cl, 4 dwg

Linear generator // 2453970

FIELD: electric engineering.

SUBSTANCE: invention relates to electric engineering, to linear generators producing electric energy. The linear generator's design is a hydrodynamic cylinder for making reciprocal movements of a piston (6) in a cylinder (1) in the axial direction by means of a sequential application of fluid medium pressure to the piston (6) in the left hydrodynamic chamber (4) in contact with the left final wall (2) of cylinder (1) and fluid medium pressure in the right hydrodynamic chamber (5) in contact with the right final wall of cylinder (1). The permanent magnet (9) is formed between the left pressure surface (7) in contact with the left hydrodynamic chamber (4) of the piston (6), and right pressure surface (8) in contact with the right hydrodynamic chamber (5) of the piston (6). The electric induction coil (11) is installed above the left and right hydrodynamic chambers (4, 5), and formed on the cylindrical wall between left and right final walls (2,3) of the cylinder (1) so that power energy is generated in electric induction coil due to reciprocal movement of piston (6) with permanent magnet in axial direction.

EFFECT: improved stability and effectiveness of power energy generation and simplified design and reduced weight and dimensions.

5 cl, 11 dwg

Well generator // 2442892

FIELD: electric engineering.

SUBSTANCE: the invention relates to electric engineering and is used to supply power to well equipment. The well generator comprises a protective casing, electric socket, at least one attachment fitting, a rotor with a hydroturbine, permanent magnets, furthermore, the rotor and actuating coils are fixed inside the protective casing, magnets and actuating coils have circular shape and are positioned inside a cylinder with alternation and axial clearance between them. The generator has an additional rotor installed concentrically with the first rotor and connected with it through a reductor. The second rotor ahs a disc with soft magnetic inserts, which is positioned between the actuating coil and permanent magnet. The well generator contains at least one pressure and temperature expansion compensator, linked with the driving clutch.

EFFECT: simplification of the well generator design, increased reliability and power output while reducing the generator size and weight.

3 cl, 4 dwg

FIELD: oil and gas industry.

SUBSTANCE: invention is related to power supply system of borehole surface system assembly. The power supply system of a borehole surface system assembly contains at least one primary engine interconnected to fuel source supplying the primary engine and containing at least one heat source, at least one pump driven by the primary engine interconnected to at least one borehole and at least one fluid used in the borehole and at least one auxiliary system interconnected to the heat source from at least one primary engine. At that the auxiliary system contains a heat exchanger designed to transfer heat from the heat source to the fluid in order to separate one part of the fluid from the other part in at least one borehole.

EFFECT: improving efficiency, flexibility and productivity of the power supply system of a borehole surface system assembly.

20 cl, 5 dwg

Turboalternator // 2404370

FIELD: engines and pumps.

SUBSTANCE: proposed turboalternator comprises outer stator arranged in tight casing, upper fairing and inner rotor fitted on turboalternator shaft. The latter runs in rolling bearings arranged on both sides of the rotor. Said shaft is furnished with two extra seals. Said tight casing is filled with lubricant-coolant. It comprises two stationary pistonless compensators that do not revolve with the shaft. First compensator is arranged inside turboalternator housing nut and filled with lubricant-coolant. Second compensator is arranged in shell that covers the turboalternator tight housing. First seal separates inner space of the said first compensator from outer fluid (drill fluid), while second seal separates first compensator inner space filled with lubricant-coolant from turboalternator tight housing, also filled with lubricant-coolant.

EFFECT: notable reduced abrasive wear, ruling out turbulent flow origination, longer life and higher reliability.

1 cl, 1 dwg

FIELD: engines and pumps.

SUBSTANCE: invention can be used as a hydraulic turbine for producing electric power, as a pneumatic and hydraulic turbine making a drive in heading machines, as well as in drilling gas and oil holes. Twin rotor stepping turbine incorporates an asynchronous reduction gear. Inner (5) and outer (6) rotors are fitted aligned on the aligned shafts, the outer and inter rotor vanes entering their inter-vane space to come into contact with the inner rotor outer surface and the outer rotor inner surface, respectively, so as to turn the said rotors in turn one way through the designed angle from the acting working clearance which allows filling the rotors' inter-vane space via the slide valves fitted on the turbine inner and outer rotors. Note that the aforesaid rotors are rigidly linked with the aforesaid inner and outer aligned shafts of the asynchronous variable gear ratio reduction gear to allow asynchronous one-way rotation of the twin turbine inner and outer rotors.

EFFECT: smaller turbine overall sizes and higher output.

5 dwg

Turbodrill turbine // 2269631

FIELD: oil and gas well drilling equipment, particularly axial flow turbine of multistage turbodrill.

SUBSTANCE: turbodrill turbine comprises stator with blade ring and inner rim, rotor with blade ring and hub. Design angles of stator flow inlet and outlet directions α2 and α1 and rotor flow inlet and outlet directions β2 and β1 are related by theoretical correlations with peripheral velocity determined in idle and optimal (shock-free) mode of turbine operation. Stator and rotor blade ring blades defining above design angles as distinct from prior art turbines are formed so that shock-free regime of flow around the stator and the rotor is realized at different peripheral velocities, wherein above shock-free regime of stator flow-around is performed in retardation mode, shock-free regime of rotor flow-around is performed in runaway mode thereof. Above stator and rotor angles are correlated as α12≤π/2 and β21≤π/2 (in the case of positive reactive turbine) and β12≤π/2 (for negative reactive turbine). The stator rim has surface of lesser diameter having conoid shape and converging towards lower cross-section thereof so that minimal annular gap defined by rotor hub is 0.05-0.3, preferably 0.1-0.2 of radial stator blade height and inner blade ring surface of lesser diameter has conoid shape and is converged to upper section so that radial rotor blade height ratio in lower and upper sections is equal to 0.7 - 0.95.

EFFECT: increased axial support resistance along with increased performance.

5 cl, 8 dwg

FIELD: electromechanical engineering.

SUBSTANCE: proposed generator primarily designed to supply with power borehole instrument of face telemetering system in the course of boring has internal stator and rotor; the latter mounts turbine in its front part that has casing carrying rectangular- or trapezoidal-section helical blades. These blades are free to vary their angle of lift depending on conditions of borehole washing with drilling fluid. Blades may be made of flexible material and have two parts of which one part is joined with turbine casing and other (loose) part is free to bend in transverse plane. In addition, blades may have variable stiffness in cross-sectional area and variable height of cross-section profile; loose parts of blades may be joined with ring. Blade turn limiter responding to maximal discharge of drilling fluid may be provided on the turbine casing.

EFFECT: enhanced operating reliability and extended variation range of drilling fluid discharge through generator turbine.

7 cl, 2 dwg

FIELD: engine manufacturing.

SUBSTANCE: invention relates to method of operation of self-contained power station powered by diesel-generator set. According to proposed method of operation of self-contained power station powered by diesel generator set equipped with additional flywheel and disconnect clutch with automatic control members, additional flywheel is mounted on separate shaft which is connected with diesel-generator set by means of disconnect clutch. Preparatory operation is carried out to set power station into operation with subsequent overcoming of short-time starting resistances from consumer. Additional flywheel is connected to shut down diesel generator set by means of disconnect clutch. Power station is started under no load, and its coming to rated speed is detected by readings of generator shaft speed pickups. Load is connected and intensity of generator shaft speed drop is checked. Information is automatically transmitted to controller wherefrom, at termination of generator speed drop, signal is transmitted to disconnect clutch, and rotating additional flywheel is disconnected from diesel generator set, thus changing the set for accelerated mode of restoration of initial rated speed.

EFFECT: provision of power saving operation at stable conditions for overcoming designed resistance torque and short-time overloads exceeding capabilities of chosen supply source.

1 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: device has metallic hubs of stator and rotor, wherein crowns of stator and rotor are concentrically pressed. Crowns of stator and rotor are made of durable ceramics and are additionally equipped with connections, allowing to exclude non-controlled turning of crowns in hubs and spontaneous axial displacement thereof.

EFFECT: higher reliability and efficiency.

2 dwg

The invention relates to the field of drilling, in particular, to a downhole motors

Downhole motor // 2224077
The invention relates to downhole motors to drive the rock cutting tool during drilling

The invention relates to a hydraulic downhole motors, which result in rotation of the roller bit, destroying the faces of barrels of drilling wells

FIELD: physics; geophysics.

SUBSTANCE: invention relates to geophysics and can be used in logging operations. Disclosed are methods and systems for downhole telemetry using a device configured or designed for deployment in a drilled well which crosses an underground formation. The device includes a downhole telemetry unit, a surface telemetry unit and a line for transmitting data between the downhole and surface units, configured to designed to transmit data over one or more data transmission channels using at least one telemetry circuit selected from a plurality of telemetry circuits based on at least one downhole parameter.

EFFECT: high quality of transmitting exploration data.

26 cl, 7 dwg

Up!