Axial bearing slide downhole motor
(57) Abstract:The invention relates to the oil and gas industry, in particular to devices used in drilling wells. The invention consists in that the working ends of the disk axial bearing is equipped with carbide protruding inserts placed around the circumference of the friction, the minimum clearance between them is less than the lateral dimension of the insert on the same circumference, and the non-rotating disk is mounted for engagement with the frame via an elastic element by means of at least three radial projections made on the back side of the disc and in contact with the radial depressions on the end surfaces of the elastic elements. The invention provides improved reliability axial bearing hole of the engine when operating in conditions saleabration environment. 3 Il. The invention relates to the oil and gas industry, in particular to devices used in drilling wells.Known multistage axial bearing slides, designed as multi-stage bearing, each stage of which consists of a thrust bearing is a flat metal part having a protruding >The disadvantage of this device is a low resistance when working in the environment of abrasive mud.The closest technical solution chosen by the author for the prototype is the axial bearing of the sliding hole of the engine, containing mounted on the shaft of the rotating disks are accommodated in the housing nonrotating disks and elastic elements. However, this support is not reliable, especially in abrasive environment there is wear of the contacting elastic and metallic friction elements. Therefore, the resistance of support in the environment of abrasive fluids do not exceed 100-150 hoursThis resistance does not meet modern requirements drilling technology, as used in the present design of the rock cutting elements provide the duration of the flight up to 300 hours or more.The objective of the invention is to enhance reliability axial bearing hole of the engine when operating in conditions of highly abrasive environment. To solve this problem in the axial bearing of the sliding hole of the engine, containing mounted on the shaft of the rotating disks are accommodated in the housing nonrotating disks and elastic elements, the working ends of the drive is equipped with carbide invoice is knogo size inserts on the same circumference, moreover, the non-rotating disk is mounted for engagement with the frame via an elastic element by means of at least three radial projections made on the back side of the disc and in contact with the radial depressions on the end surfaces of the elastic elements.In Fig. 1, 2 and 3 depict, respectively, the degrees of the axial sliding bearing, the cross section at contact surface of the carbide inserts and longitudinal section of the disk in contact with the elastic element.Bearing consists of a rotating disk 1 attached to the shaft by axial compression spacer sleeves 2. End surface of the disk exposed reinforced over them carbide inserts 3, placed around the circumference of the friction with the space between the inserts "a", which is less than the lateral dimension of the "in" insert on the same circumference. The working side of the non-rotating disc 4 is also reinforced by inserts. The back side of the disk 4 has three radial protrusions 5, which are radial depressions made on the end surface of the sheath elastic element 9. Metal frame elastic element 6 is mounted in the housing 7 by axial compression of the bushings 8.In the new support, in contrast to known the hardness of the abrasive particles in the drilling fluid), that makes it very resistant to abrasive wear. The test results of laboratory samples, simulating the axial bearing downhole motor, showed that in a wide range of axial loads and engine speeds when working in the aquatic environment, carbide pair has a coefficient of friction less than the coefficient of friction pairs rubber-metal.In the process, supports the axial load from the shaft to the housing is transmitted through the elastic element, which allows to evenly distribute the load along the rows, columns and dampens shock loads that occur during operation of the bit on the bottom of the borehole.The heat from the friction surfaces of the disks is made as small amount of washing liquid flowing in between the protruding carbide inserts and the main volume passing through the hollow spindle shaft fluid.Sources of information
1. Guzman, M. I., Lyubimov B. G., Nikitin, M. and others, "design, construction and operation of turbodrills", M, "Nedra", 1976, page 205.2. Guzman, M. I., Lyubimov B. G., Nikitin, M. and others, "design, construction and operation of turbodrills", M, "Nedra", 1976, pages 247 - prototype. Axial bearing scoliosis disks and elastic elements, characterized in that the working ends of the carbide discs have protruding inserts placed around the circumference of the friction, the minimum clearance between them is less than the lateral dimension of the insert on the same circumference, and the non-rotating disk is mounted for engagement with the frame via an elastic element by means of at least three radial projections made on the back side of the disc and in contact with the radial depressions on the end surfaces of the elastic elements.
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.