The spindle stabilizer
(57) Abstract:The invention relates to the field of technical equipment for drilling oil and gas wells, and in particular to a hydraulic downhole motors. The spindle stabilizer hydraulic downhole motor includes made in the form of a container body connected with the housing upper and lower thick-walled subs, on the outer surface of which is made of blades and the inner surface through the upper and lower radial bearings rely on the hollow shaft, and the spindle stabilizer is accommodated in the housing container support the heel and stator elements of the upper and lower radial bearings placed in the upper and lower thick-walled subs, their axial and radial fixation in these subs together with hard-regulation and reduction bushings supporting the heel through Cabinet nuts, that clamps the pivot bearings and the spacer rings of the supporting heel. The invention improves the efficiency of drilling directional wells due to the stabilization of the housing of the spindle. 1 Il. The present invention relates to the field of technical means by which drilled netomat the rotation of the drill bits, destroying the bottom of deep wells.All downhole motors are axial bearing, perceiving the hydraulic load on the motor rotor and the reaction from the axial load on the bit. This bearing is made in a special, quick change drilling, site-spindle (see Downhole motors and spare parts. Directory, M.: Nedra, 1980).Distant analogue of our invention is the spindle podatkowy (see Fig. 26, S. 79 above).However, the design of this spindle does not perform to its relatively thin body and short subs (the nipple and coupling) is sufficiently long and wide in the radial direction of the blade, through which the axis of the spindle shaft and attached to its lower end to stabilize the bit in the annular space relative to the axis of the drilled wells. Attempts to weld the blade to thin-walled housing is not only deform it, but also significantly reduce the area of the annular gap between the housing and the borehole wall, which, on the one hand, reduces trouble-free service life of the spindle, and on the other, leads to the rapid destruction of the walls of the drilling wells.The closest analogue of the invention the stone surface which has blades, thus the inner surface of the sub has a radial bearing, which is supported on the hollow shaft of the spindle and accordingly sets its axis along the axis of the thick-walled sub (see RF Patent 2047721, bull. 32, from 10.11.95).But when this version of the blade to limit reduce the area of the annular cross section of the wellbore and accordingly increase the speed of the upward flow of the drilling fluid. In this case, is meaningless the idea of stabilizing the longitudinal axis of the spindle in the barrel drilled wells, because, on the one hand, begin to rapidly collapse the walls of the well with which the contact blades, on the other hand, to the limit is reduced longitudinal axis of the base support centration distance from the rock surface of the bit to the point of contact of the blades with the borehole wall.Our invention allows to stabilize the spindle body in the trunk of drilled wells with long and wide (in radial direction) blade: straight or spirally twisted, while not reducing radial axial dimensions of the supporting feet and not increasing the speed of the upward flow of the drilling fluid in the wellbore in places where the blades of Kontraktovaya hydraulic downhole motors with spindle-stabilizers, performed in accordance with our invention. These areas include: drilling a strictly vertical sections boreholes; drilling directional rectilinear sections of directional wells.Due to the effective stabilization of the housing of the spindle, and consequently the shaft and drill bit in the wellbore drilled wells, increasing performance bits and increased trouble-free service life of the axial leg-heel spindle is the most rapidly wear node of hydraulic downhole motors.The essence of our invention is to provide spindle-stabilizer, the body of which is made in the form of the container that its lower end is associated with thick-walled sub, on the outer surface of which has the blades and through which the lower radial bearing its inner surface rests on the hollow spindle shaft; the upper end of the housing of the container is connected with the upper thick-walled sub, on the outer surface of which there are also blades, with the upper radial bearing its inner surface rests on the hollow shaft of the spindle. Support the heel of the spindle stabilizer is housed in the housing container. Internal fit gianera, and the diameter on which are placed the base of the blades thick-walled subs, 10...80 mm less than the outer diameter of the container. The stator elements of the upper and lower radial bearings is placed in the upper and lower thick-walled subs; their axial and radial fixation with angular adjustment and reduction bushings supporting the heel through Cabinet nut that clamps between the inner thrust end face of the upper thick-walled sub and its internal thrust end face of the thrust bearings and spacer ring bearing-heels, accommodated in the housing container.On the hollow shaft of the spindle-stabilizer using gaici-coupling clamped (with emphasis in the lower outer end of the shaft) of the rotor sleeve radial bearings, spacer bushings, discs heel and spacer ring disks, angular adjustment of the shaft sleeve.The invention is illustrated in the drawing, which shows a General layout of the spindle Assembly-stabilizer.To the body of the container 1 spindle on the bottom of the thread is fastened a thick-walled sub 2, top - heavy wall sub 3, through which the spindle is attached to the housing of the working section of hydraulic downhole motor (less than the overall diameter of the drill bit (not shown), mounted on the lower threaded end of the hollow shaft 5 of the spindle of the turbodrill. Diameter, on which is placed the base of the blades 4 subs 2 and 3, is always less than the outer diameter of the housing container 1 for a value of 10 to 80 mmThis diameter is selected so that, depending on the number of blades, their width, the angle of inclination to a plane perpendicular to the axis of the shaft 5, and their outer overall diameter, square megapastor section would be 10-20% greater than the cross-sectional area formed by the nominal diameter of the bit, its a well bore, and the outer diameter of the container 1.Internal fit (mounting) diameter subs 2 and 3 always on 10-40 mm less than the internal fit (mounting) of the diameter of the container 1.On the inner thrust end face of the upper thick-walled sub 3 rest: top hard-adjusting sleeve 6, the stator elements 7 two to four upper radial bearings, the transition sleeve 8, the thrust bearings 9 and the spacer ring 10, the stator elements 7 two to four lower radial bearings, the lower angular adjustment sleeve 11.This stator elements 7 of the upper and lower radial bearings soybeans upper thick-walled sub 3 and the lower thick-walled sub 2.The thrust bearings 9 and spacer rings 10 are fixed in the radial direction in the landing (mounting) the diameter of the inner surface of the housing container 1.The axial compressing force, with which the axial and radial stiffness above mentioned structural elements, in thick-walled subs 2 and 3 and in the housing container 1 is achieved by tightening big torque, with failure of the inner end of the Cabinet nut 12.On the hollow shaft 5 by a nut-clutch 13 fixed rotary sleeve 14 of the upper and lower radial bearings, discs 15 and spacer rings 16, spacer spacer sleeves 17, the angular adjustment of the sleeve 18 of the shaft 5.The radial centering of the shaft 5 relative to the mounting surfaces of the inner cylinder subs 2 and 3 due to a hard landing tolerances rotary bushing 14 to the shaft 5 and stator elements 7 radial bearings relative to the Seating surfaces of the inner cylinder subs 2 and 3.The disks 15 and the spacer ring 16, the thrust bearings 9 and the spacer ring 10, and the upper angular adjustment sleeve 6 is fixed only settling the SPINDLE STABILIZER
Directly on the rig to the lower threaded end of the hollow shaft 5 of the spindle-stabilizer attached drill bit; in this case, the spindle is supported on the weight of the drilling system drilling rig above the rotary table using the Elevator, exciting body container 1 spindle under the blades 4 of the upper thick-walled sub 3.Then to the sub 3 secures the working section of hydraulic downhole motor (turbine or screw).The sequential increase the drill pipe string all drilling layout is brought as close as possible to the bottom of the borehole. Included in the work of the mud pumps, and begins the process rassilki old trunk, and then further deepening of the borehole bottom.At the same time (in contrast to the existing practice of downhole drilling motors) centering bit and stabilization in the wellbore axis of the spindle shaft is carried out without an abrupt increase of speed of the upward flow of drilling fluid along the blade subs-stabilizers. This wide and long blades of thick-walled subs not only to the possible minimum limit lateral and angular displacement of the shaft axis in a bit, but the o in groundwater fluctuations of the center of gravity of the bit and unbalanced torque, implemented on the surface of its rock elements. Such a design of spindle-stabilizer-tokage severely limits the jet angle of twist drill pipe, which greatly facilitates the sight of tool for directional drilling in almost completely eliminates the "twist" bump-hole layout in the drilling process.The result is not only a precision directional drilling, but also the growth performance bits. The spindle stabilizer comprising a housing associated with the housing of the lower thick-walled sub, on the outer surface of which has the blades and the inner surface through the lower radial bearing rests on the hollow shaft of the spindle-stabilizer, characterized in that it has associated with the case, which is made in the form of a container mounted on the shaft through the upper radial bearing upper thick-walled sub, on the outer surface of which is made of the blade, the spindle stabilizer has the support of the heel, which is housed in the housing container, and internal fit, the diameters of the upper and lower thick-walled subs on 10-40 mm less than the internal d subs, on 10-80 mm less than the outer diameter of the container, with the stator elements of the upper and lower radial bearings placed in the upper and lower thick-walled subs, their axial and radial fixation in these subs together with hard-regulating sleeves and reduction bushings supporting the heel through Cabinet nut that clamps between the inner thrust end face of the upper thick-walled sub and its internal thrust end face of the thrust bearings and spacer ring bearing-heels, accommodated in the housing container.
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.