Downhole generator of rotating magnetic field

FIELD: mining.

SUBSTANCE: invention relates to a downhole generator of a rotating magnetic field. Downhole generator of a rotating magnetic field comprises a stator unit including stationary cylindrical housing (1) and winding (20) arranged in the first area (L1) of housing (1) and a rotor unit including permanent magnet (10) arranged in the radial direction outside the winding and turbine rotor (8) arranged in the second area (L2) of housing (1), which in the axial direction is adjacent to area (L1). Rotor (8) and magnet (10) are rigidly interconnected along the axial direction and are arranged onto housing (1) on both ends of the rotor unit respectively through the first bearing and the second bearing. Housing (1) includes internal axial channel (18) and radial channel (22) arranged in its first area. To output the generated electric power and/or a generated electric signal used is electric conductor (21), which passes through a radial through hole with a seal and is connected to the winding.

EFFECT: invention is aimed at increasing power and optimizing the configuration of the generator.

9 cl, 1 dwg

 



 

Same patents:

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

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

FIELD: oil and gas industry.

SUBSTANCE: downhole tool includes a drill bit on its lower end and a drill motor containing a casing with a rotor rotating in the rotor channel in the casing when the drill tool passes through it. The rotor has a bypass channel for bypassing some portion of the drill mud via it. The valve includes a plate of the valve, which is installed upstream of the motor and has at least one flow pass and at least one bypass passing through the same plate. At least one flow pass is hydraulically interconnected with the rotor channel for passage of the drill mud passing through it. The rotor is made so that it can be rotated in the casing. At least one bypass is selectively hydraulically interconnected with the bypass valve when the rotor is being rotated in the casing, and the bypass channel is selectively moved in a position of alignment with at least some part of at least one bypass for bypass of some part of the drill mud via it, thus generating an impact action on the hammer.

EFFECT: preventing seizures of a drill tool, reducing vibration, increasing drilling efficiency with a downhole tool so that the bit damage is prevented.

25 cl, 14 dwg

FIELD: engines and pumps.

SUBSTANCE: invention relates to borehole helical motors. This motor consists of two, tope and bottom sections. Each of the latter comprises screw working members built around multistart gerotor mechanism with internal cycloidal engagement. Spindle with output shaft runs in axial and radial bearings. Hinge joint of rotor helical working members with output shaft and fluid passages. Helical working members stator of top section is fixed at drilling string. Bottom section output shaft is coupled with rock cutting tool. Top section output shaft is rigidly coupled with bottom section helical working member stator fitted in adapter bore coupling fixed bodies of spindles and concentrically spinning in adapter radial bearing.

EFFECT: enhanced power characteristics, particularly, higher output shaft rpm.

2 cl, 5 dwg

FIELD: mining.

SUBSTANCE: drill string bottom part assembly comprises downhole motor fitted at said drill string and having rotor and stator. Note here that first hole is made in said rotor. Spindle arranged under downhole motor with second hole made therein. Third hole is made in the shaft with first and second ends. First end is coupled with rotor via first universal adapter. Second end is coupled with spindle via second universal adapter. Inner rod is fitted in the shaft third hole. Note here that inner rod has inner passage and third and fourth ends. Third end seals communication of inner passage with the rotor first hole while fourth end seals communication of inner passage with the spindle second hole.

EFFECT: transducer signal transmission, power supply inside assembly spinning elements.

21 cl, 8 dwg

FIELD: oil and gas industry.

SUBSTANCE: device contains a hollow body with a gerotor screw mechanism inside that includes a stator placed in the body coaxially and a rotor installed inside the stator and the rotor rotation is carried out by fluid delivered by the pump, a transmission section that includes a shaft mounted at the axial bearing made as a multirow thrust and radial bearing and at the upper and lower radial skid bases consisting of the outer and inner sleeves placed in the transmission section body and respectively at the transmission section shaft; the transmission section shaft is fixed at the input by a drive shaft with a rotor and at the output it is fixed with a chisel; the motor is equipped with the upper collar grab consisting of a shaft, a thrust and a nut and the lower collar grab made as a fishing collar with the outer fishing clamp, a thrust collar and the lower threaded crossover with an inner fishing clamp; the upper collar grab is fixed to the upper part of the gerotor screw mechanism while the lower collar grab in mounted at the transmission section shaft between the inner sleeve of the lower radial bearing and the axial bearing made as a multirow thrust and radial bearing. The transmission section shaft and the fishing collar of the lower collar grab with the outer fishing clamp are fixed rigidly with each other by means of a common thread thus providing tightness at butt ends of the thrust collar placed between butt ends of the fishing collar and the inner collar of the lower radial skid base. Cross-threading direction of the transmission section shaft and the fishing collar of the lower collar grab coincide with the direction of drill string rotation during tripping out.

EFFECT: improving accident-free operation, service life and reliability of motors, accuracy of hole making and the rate of parameters set for the hole curvature and passing ability.

5 cl, 2 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: proposed method comprises measuring the pressure in injection line with loaded and idle bit and maintaining constant measured differential pressure. Note here that maximum tolerable bit feed speed (Vtf) is defined by mathematical formula. Then, bit feed speeds are defined and in case it exceeds said maximum tolerable magnitude it is decreased to Vtf.

EFFECT: higher efficiency of drilling.

2 dwg

FIELD: mining.

SUBSTANCE: invention refers to drilling equipment, and namely to downhole motors for well drilling. A spindle includes a housing, a throttle and a shaft with a through axial channel, which is installed in the housing with possibility of axial movement within the limits of a guaranteed play. Between three sealed radial supports there installed are two sections of a multistage bearing plate to take an axial load in downward and upward directions. Each stage of the bearing plate consists of discs with supply hydraulic channels and flow centre plates, the rubber elements of which have annular chambers forming together with discs the thrust hydrostatic bearings. A throttle is replaceable and installed in an axial channel of the shaft. Diameter of the throttle pass for creation of pressure drop is chosen in compliance with an expected hydraulic load on the axial support in start-up operating mode of the motor. On outer surface of the shaft there are blind longitudinal slots hydraulically connecting in a separate manner a cavity above upper radial support to annular chambers of the upper section of the bearing plate and a cavity above the middle radial support to annular chambers of the lower section of the bearing plate. The cavity above lower radial support is hydraulically interconnected with the shaft axial channel below the throttle.

EFFECT: improvement of a motor structure.

1 cl, 3 dwg, 2 tbl

FIELD: oil and gas industry.

SUBSTANCE: unit to control power load onto working elements of a screw downhole motor comprises a half-coupling with radial and axial through channels, a spring-loaded container installed in the axial through channel of the half-coupling with a hydraulic monitor attachment, a burnisher of alternating cross section, installed as capable of axial displacement, a spring and seals. It also comprises a hollow pressing nut installed in the axial through channel of the half-coupling for interaction with the spring-loaded container and with an inner ledge made in the axial through channel of the half-coupling or the burnisher. The burnisher is made in the form of a replaceable tip installed onto the stem.

EFFECT: makes it possible to increase efficiency, reliability and durability.

3 cl, 1 dwg

FIELD: engines and pumps.

SUBSTANCE: motor includes a housing with a rotor arranged inside it, the rotation of which is performed by the fluid medium supplied with a pump, as well as a spindle housing with a shaft arranged inside it, which is installed on radial and axial sliding supports. The spindle shaft is attached to the motor rotor and a bit. Some amount of fluid medium is pumped through radial and axial sliding supports, and axial support of the spindle is made in the form of two pairs of rotor and stator rings with an annular row of thrust modules, which is fixed in each of them. Stator rings are fixed in the spindle housing, rotor rings are installed on the spindle shaft, and each thrust module includes layers of polycrystalline diamonds on the edge facing the edges of adjacent modules, and contacts in turn with one or two edges of adjacent modules. The motor includes a splined bush with external splines, which is installed on the spindle shaft, and two elastic damping supports arranged on the edges of the splined bush and receiving axial forces acting on the axial support of the spindle. Each elastic damping support contacts the rear edge of the corresponding rotor ring with the fixed annular row of thrust modules, and rotor rings with annular rows of thrust modules fixed in them are provided with internal splines corresponding to external splines of the splined bush, and each of them is installed with possibility of annular distortion of the rotor ring with the annular row of thrust modules, which is fixed in it, relative to its own elastic damping support.

EFFECT: increasing service life and improving reliability of the axial sliding support of the spindle of the hydraulic downhole motor with thrust modules; improving accuracy of curvature parameters of the well shaft; enlarging the hole boring per bit run using hydraulic jars in the tubing; increasing the increase rate of curvature parameters of wells, and reducing stresses in the layout of the bottom of the drill column and downtime of the drilling unit.

6 cl, 5 dwg

FIELD: machine building.

SUBSTANCE: device includes frame 2, powder brake 3, kinematic chain A between outlet shaft of HBM 1 and rotor 4 of powder brake 3, hydraulic baffle plate 5, monitoring and testing unit 6 and date control and processing unit 7. Kinematic chain A is made in the form of gear-type conical multiplier 8 with coupling clutches 9, 10 in connections of its shafts 11 and 12 with outlet shaft B of HBM 1 and rotor 4 of powder brake 3. Hydraulic baffle plate 5 is made on cover plate 13 of multiplier 8 in the form of an annular reservoir enclosing with seal 14 the lower part of housing B of HBM 1.

EFFECT: improving accuracy and enlarging the HBM loading range at testing, and possibility of stand-alone use.

1 dwg

FIELD: machine building.

SUBSTANCE: invention is used for run-in and test of hydraulic bottomhole motor (HBM). When testing HBM 1, it is installed in a vertical position above well 2 of its further operation and attached to housing A by means of spinning wrench 3 on stationary drilling outfit 4 of well 2. Outlet shaft 5 of spindle 6 of HBM 1 is attached through coupling device 7 to inlet shaft 8 of multiplier 9 installed on rotary table 10. Rotation of rotor 11 with spindle 6 is performed by injection of working fluid to HBM 1 through adapter 12 of pump station 13 of drilling outfit 4 of well 2. Mechanical loading of outlet shaft 5 of spindle 6 is performed through multiplier 9 kinematically connected at its outlet shaft 15 to powder brake 17, with further measurement and analysis of revolutions and braking moments at the outlet of the latter, and flow rate and pressure of working fluid at HBM 1 inlet.

EFFECT: improving accuracy of the method and its approximation to HBM operating conditions.

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

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