The downhole motor spindle
(57) Abstract:The invention relates to equipment for drilling, and in particular to actuators for rotary drilling, placed in the well. The invention consists in that the elastic element is placed inside the device, installed between the radial bearings and is made in the form of two groups of spring rings, each of which contains an inner ring mounted on a shaft and the outer ring is fixed in the housing, and the rings are arranged with a gap between them and the axial bearing is located between the two groups of spring rings and annular channel providing a flow of lubricating fluid between the two groups of spring rings. The invention provides for the reduction of dynamic loads on the spindle, a significant suppression of vibrations and, consequently, increase the service life of the spindle. 1 C.p. f-crystals, 1 Il. The invention relates to equipment for drilling, and in particular to actuators for rotary drilling, placed in the well.In operation, the spindle is experiencing significant dynamic loads due to surface irregularities of the borehole walls, the ripple washing liquid, uneven with martisius device.A device for preventing mechanical wear downhole motor, made in the form mounted in the housing and on the shaft of the turbo-drill bushings and retainer, while the sleeves have radial grooves that are offset relative to each other in height by the amount of permissible backlash exhaust turbo-drill, and the latch is made in the form of a spring-loaded ball placed in the radial groove of one of the bushings (and.with. The USSR 933923, E 21 In 4/02, 07.06.82 year ).The disadvantage of this device is heavy wear grooves and surfaces interacting with balls, which significantly reduces the service life of the spindle.Known damper spindle turbo-drill, comprising a housing with an internal helical surface, a shaft with an outer screw surface and placed between the elastic element. The latter is in the form of a closed elastic shells spiral shape. Hollow shells filled with a viscous fluid and communicate among themselves by means of the throttle node accommodated in the housing. On the shaft and in case there is a stub limiting axial displacement of the elastic element.with. The USSR 1659619, E 21 In 4/00, 30.06.1991 year).This device is of considerable length, which increases the por what causes low operational reliability, because if the size of the hole it is impossible to ensure a sufficient thickness and strength of the walls of the elastic element.For the prototype accepted spindle, comprising a casing placed inside the shaft, the axial and radial bearings, the elastic element. The upper radial bearing consists of a sleeve mounted on the shaft, and a sleeve fixed in the housing. Between the sleeves is placed an elastic cylindrical element of the wear-resistant material with a low coefficient of friction. In the elastic element vulcanized compression spring. Elastic element in the upper part rests on the disk mounted in the housing, and at the bottom of the disk mounted on the shaft. Similar elastic element is located in the lower radial bearing, and in the upper part of the elastic element rests on the disk mounted on the shaft, and at the bottom of the disk mounted in the housing (RF patent 2011776, E 21 In 4/00, 30.03.1994,).The disadvantage of the prototype is that the perceiver axial force of the elastic element made in the form of a cylinder placed between the two sleeves and resting on the ends to disks, deprived of the opportunity to change its geometrical dimensions during elastic deformation in the process of damping the shock naeto provided between the axial bearing. Elastic element, which is a metal spring in the rubber, being reduced in length to some extent will changes in diameters, which can lead to jamming of the radial bearing or abnormal wear rubber parts as a result of the rubber extrusion through the annular clearances between the support disks and the housing, and the shaft.Task to be solved by the claimed invention is directed, is to increase the service life of the spindle.The technical result from the use of this invention is a significant vibration reduction and, consequently, reducing the dynamic loads on the spindle.The technical result is achieved due to the fact that in the spindle hole of the engine, which includes a housing, shaft, axial and radial bearings mounted between the elastic element, the latter is in the form of two groups of spring rings, each of which contains an inner ring mounted on a shaft and the outer ring is fixed in the housing, and the axial bearing is located between these groups. Internal and external snap rings elastic element is made of the same stiffness. In the axial bearing is made annular channels connecting between the both groups of the other items on 55-60% of the total precipitation during Assembly of the spindle.The drawing shows a General view of the proposed spindle in the section.The spindle includes a housing 1, the hollow shaft 2, top 3 and bottom 4 radial bearing located between the elastic element consisting of two groups of spring rings, the inner ring 5 is installed on the shaft 2 and the outer ring 6 in the housing 1. Between them is placed multi-row ball axial bearing 7, in which the annular channels 8, connecting the two groups of rings of an elastic element. The outer diameter of the ring 5 is smaller than the inside diameter of the ring 6 to form between them a guaranteed backlash and spring ring are made of the same stiffness. In the housing 1 provided with channels 9 and 10 for pumping lubricating fluid. In addition, the spindle is provided with a seal assemblies 11 and 12, which consist of two sealing and wiper rubber elements and sealing elements facing in different directions and separated by a ring that prevents the "wrapping" their skirts.The spindle works as follows. When assembling it to create the preload of the elastic element, 10-15% greater than the axial thrust on the spindle. When this sludge spring rings 5 and 6 is 55-60% of the total. The annular cavity IU through radial bearings 3 and 4, the inner 5 and outer 6 rings elastic element and the axial bearing 7 are transmitted to significant dynamic loads. The presence of gaps between the spring rings 5 and 6, the elastic element and the annular channels in the axial bearing 7 provides braking lubricating fluid when flowing between the two groups of rings of an elastic element that provides additional damping of vibrations from the drilling tool.The technical effect of the proposed use of the spindle is achieved by implementation of an elastic element of the compound, resulting in the nodes bearing axial bearing podpruzhinivajushchaja on both sides with the same force that causes a significant suppression of the vibration caused by the running of teeth of the bit on the bottom, from the irregularities of the borehole walls, uneven feed rate of the drilling tool and the pulsation of the drilling fluid acting on the spindle.Pre-compression of the elastic element provides uniform distribution of load along the lines of the axial bearing.Sludge spring rings of the elastic element eliminates the separation of the elements of the axial bearing, shocks about the ledges on the walls during descent downhole number is the situation of vibrograf, the possible suppression of self-oscillations transmitted by the drill pipes. In addition, the advantages of the claimed invention are effective in extinguishing vibrograf, the possible suppression of self-oscillations transmitted by the drill pipes. In addition, there is a possibility of reducing the length of the spindle by reducing the number of rows of bearing of the engine.These advantages lead to the increase of the service life of the spindle and increased drilling speed. 1. The spindle hole of the engine including a casing, is placed inside the shaft, the axial and radial bearings, the elastic element, wherein the elastic element is installed between the radial bearings and is made in the form of two groups of spring rings, each of which contains an inner ring mounted on a shaft and the outer ring is fixed in the housing, and the rings are arranged with a gap between them and the axial bearing is located between the two groups of spring rings and annular channel providing a flow of lubricating fluid between the two groups of spring rings.2. The spindle under item 1, characterized in that the inner and outer rings of the elastic element have the same jesd the
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.
FIELD: mining industry.
SUBSTANCE: method includes physical-chemical treatment of metallic body parts, made in form of two half-cylinders, placement of puncheon within them, preparation of fresh rubber mixture, heating press-form up to 150±2°C, with following vulcanization of rubber mixture, detaching press-form, removing puncheon and controlling manufacture. Three compounds of rubber mixture are prepared, with following calendaring thereof on shafts and preparing fresh rubber strip of each compound, 0.5-0.6 mm thick, which prior to placement of puncheon in half-cylinders is wound in halving fashion onto the latter. Of rubber strip of compound, providing for durability, inner layer of rubber winding is made, of compound strip, providing for auto-compensation of wear - middle layer, and of strip, providing for hardness of connection between resin and half-cylinders - outer layer. Each layer of rubber winding is made of thickness, determined from relation k·hw, where h - thickness of each winding layer, mm; k - coefficient, determined empirically, equal to 30-0.35 for inner layer, 0.50-0.60 for middle layer, 0.10-0.15 for outer layer; hw - total thickness of rubber mixture winding, mm. glue covering is applied to each layer and rolled under pressure. After heating of press-form, the latter is placed into one of half-cylinders. Puncheon with rubber winding is deployed and connected to second half-cylinder. After vulcanization and removal of puncheon, rubber-metallic portion of stator is fixed in body pipe.
EFFECT: higher durability and simplified maintenance.
4 cl, 2 dwg, 5 ex
FIELD: oil and gas industry.
SUBSTANCE: device has turbine module, screw gear couple, including stator and rotor, assembly for connection of rotor of screw gear couple to turbine module and spindle, according to invention, rotor of screw gear couple has pass channel, into which a valve is mounted, including locking element and saddle, while locking element is mounted on resilient element with space to saddle surface and with possible contact with saddle surface. When engine is launched whole flow of drilling mud skirts screw gear couple through pass channel in rotor and open valve, i.e. through space between locking element and saddle surface and is directed into turbine module. In face engine loads on elements of gear couple are decreased during its launch due to redistribution of flows of working liquid between screw gear couple and turbine.
EFFECT: higher reliability, higher durability.
2 cl, 3 dwg
FIELD: mechanical engineering.
SUBSTANCE: rotor axis of gear mechanism, performing a planetary movement, is displaced relatively to stator axis for distance of engagement eccentricity. As source auxiliary contour ellipse is used, while proportional coefficient k, determining radius of guiding circle, is taken equal to half necessary number of teeth z of wheel (k = z/2), optimal shape of its teeth is provided by rational combination of ellipse shape coefficient λ, equal to relation of lengths of its semi-axes and eccentricity coefficient of auxiliary contour, in form of relation of length of greater ellipse semi-axis to rolling circle radius, while inner and outer profiles are made in form of elliptic profiles from common ellipse contour.
EFFECT: simplified manufacture.
3 cl, 11 dwg
FIELD: oil and gas industry.
SUBSTANCE: roller tracks at edge inner and outer rings are made on same side, roller tracks at inner and outer rings are made with possible contact of balls with roller tracks of inner and outer rings at angle, greater than 45°, angle being formed by line, passing through points of contact of balls with roller tracks of inner and outer rings and line, perpendicular to longitudinal axis of bearing, profile of roller tracks on inner and outer rings is made from inequality condition D1 > (Din + Dout)/2, where D1 - diameter of circle passing through centers of balls in assembled bearing, Din - inner diameter of inner ring, Dout - outer diameter of outer ring, hardness of inner and outer rings being greater than 48 HRC, application point of radius of roller tracks profile on inner rings is placed in plane of stopping end of inner ring.
EFFECT: higher durability and reliability.
FIELD: oil and gas well boring equipment.
SUBSTANCE: boring rig comprises turbodrill, drill bit and reducer including several planetary mechanisms and installed in-between. Sun gears of both planetary mechanisms are secured to turbodrill rotor shaft. Carrier with plane pinion axes of upper planetary mechanism is connected to boring rig body. Ring gear is attached to upper link of drill bit. Ring gear of lower planetary mechanism is linked with plane pinion axes of upper planetary mechanism, carrier thereof is connected with lower link of drill bit.
EFFECT: increased efficiency due to increase in turbodrill rotor speed up to optimal value, reduced number of turbodrill steps and hydraulic resistance thereof, increased flushing liquid flow velocity, reduced reactive moment on turbodrill stator and pipe string.
FIELD: oil and gas well drilling equipment, particularly hydraulic downhole motors.
SUBSTANCE: device has screw bottomhole motor comprising sub and body for arranging operating tool sections. Tool sections are mating rotor and stator surfaces made in the form of multistart screw pair. Tangential current-speed and inlet drilling mud direction transducer is installed above screw pair. The transducer comprises body, retaining ring and sealing collar. Blades of the transducer are right-handed (in opposition to helical teeth of the rotor and the stator).
EFFECT: increased mechanical penetration rate due to increased load applied to drilling bit without reduction in power and shaft torque indexes.
FIELD: drilling equipment, particularly for directional drilling, namely control devices adapted to control angle and reactive moment.
SUBSTANCE: control device has hollow central member and three hollow tubular noncoaxial members connected to hollow central member. Inner member is disposed in center between the first and the second members. The first and the second members are connected with inner members by threaded connection. The first member is connected to spindle by threaded coupling, the second member is attached to engine body by threaded coupling and central member is connected to inner member by spline. Each of central member and the first member are provided with sectional contact seats located from spindle connection side, wherein a pair of sectional contact seats arranged from either sides of meridional spindle plane in drilling string curvature plane are defined between central and the first members. Sectional contact seats defined between central and the first members are spaced a distance L from the nearest edges of sectional contact seats of central and the first members along central axis of the first member. The distance L is more or equal to spindle diameter D. Angular deviation of the sectional contact seat formed in the first member from meridian spindle plane in drilling string curvature plane is oppositely directed relative reactive drilling bit moment.
EFFECT: increased stability and angle of gerotor engine deflection and increased accuracy of non-uniform well bottom zone penetration.
2 cl, 10 dwg
FIELD: well drilling equipment, particularly bearings adapted to work in abrasive medium.
SUBSTANCE: radial bearing has body and shaft, as well as thrust collars secured in the body and spring-loaded holders arranged between the shaft and the body. Inserts with conical outer surfaces are located between the holders and the shaft so that inserts cooperate with the shaft and with inner surfaces of the holders. Radial bearing is made as two oppositely arranged blocks and as compression spring inserted in-between. Each block has stop member secured in the body and made as slotted bush. Inserts are arranged in the bush and may perform displacement in radial direction. Thrust collars have conical surfaces cooperating with outer surfaces of the inserts. Angles α at apexes of the cones defined by interacted conical surfaces of bearing support inserts, thrust collars and holders are correlated with friction coefficient μ of interacted surfaces as tg(α/2)≈μ. Insert surfaces cooperating with shaft surface may have coating of elastomeric or hard-alloy material. In accordance with the second embodiment surfaces of inserts, thrust collars and holders interacting one with another may have flat contact zones, which are inclined at (α/2) angle to longitudinal shaft axis.
EFFECT: increased operational reliability of radial bearing.
6 cl, 3 dwg
FIELD: oil and gas well drilling equipment with the use of hydraulic downhole motors.
SUBSTANCE: support-and-centering member is made as metal hub with blades connected to spindle connector. Spindle connector has support cone formed on outer surface thereof and adapted to provide rigid connection with metal hub from inner surface thereof. Support cone of the connector is formed from side of conical thread connecting spindle body with connector. Spindle connector has splines to connect thereof with metal hub. Metal hub is pressed with pressing cone, retaining washer and nut from another side thereof. Metal hub may be installed concentrically or eccentrically to spindle connector axis or outer surface thereof may be differently shaped and arranged eccentrically, concentrically or obliquely with respect to spindle connector axis.
EFFECT: reduced costs of spindle usage.