Unit to control power load onto working elements

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

 

Control unit power load on the working bodies of the downhole motor relates to the drilling technique and can be used while drilling oil and gas wells in the composition of the downhole motor.

Known control unit power load on the working bodies of the downhole motor, containing installed in the flow channel of the hollow rotor container with a jetting nozzle, static seals (see, for example, the book "Screw downhole motors" J.F. Balenko etc. Moscow, Nedra, 1999 reference manual. P.46. Figure 2.6; RIS).

In a known control unit power load on the working bodies of the container with the jetting nozzle is installed in the hollow rotor and a flow channel is always open for flow of washing fluid in both forward and backward.

The disadvantage of this control unit power load on the working bodies is that the downhole motor is not protected from Slovenia through the flushing holes in the bit at round-trip operations.

During the descent of the downhole motor in the well washing fluid containing cuttings (pieces of drilled rock), flows freely through the hollow rotor, through working bodies, via a flow channel control unit in the engine. The sludge settles and what remains in the working bodies, breaking the contact between the rotor and stator, wears heavily on them or cemented in them, bringing the engine into disrepair.

Another disadvantage of the known control unit is the fact that when the downhole motor of the washing liquid, unproductive flowing through the flow channel control unit, pass the working bodies and does not work on the rotation of the rotor (in fact unreasonably reduced energy capability of the downhole motor).

Regulation of the power load on the working bodies is a periodic change in the performance of a mud pump that supplies washing fluid to the engine. And this requires additional time, labor and money and often not possible. And with a sudden increase in downhole load associated with the transition of the bit from one stratum of rock to another, more or less viscous, the pressure drop in the working bodies and the control unit increases, the flow area of the flow channel is significantly reduced, the quantity of washing fluid flowing through the control unit, is reduced. In this regard, the volume of drilling fluid flowing through the working bodies under pressure, increases and significantly increases the power load on the working bodies. The result is considerably increases the wear of the working parts. The rotor and stator rapidly abraded, worn out, prematurely fail because of abnormal wear. These and other drawbacks of the known control unit limits the possibility of practical use in drilling oil and gas wells.

Known control unit power load on the working bodies in the downhole motor with a container with replaceable jet nozzles with different shape and different size cross-sectional area of the entry channel (see, for example, AU No. 1430491 A1, EV 4/02, from 15.10.88, bull. No. 38).

The disadvantages of the known control unit similar to those in previous well-known control unit.

In addition, significant disadvantages of the known control unit power load on the working bodies should include what is known in the control unit uses a jet nozzle with a complicated shape of the flow channel, the determination of the degree of influence which the work of the working bodies of the downhole motor problematic.

Also the disadvantages of the known control unit can be attributed useless without ceasing the discharge of a portion of the flushing fluid through the jetting nozzle on each mode of operation of the downhole motor. Reduced engine performance, reduces the are stated its technical and technological capabilities.

These and other disadvantages significantly reduce the economic efficiency of the known control unit power load on the working bodies of the downhole motor and does not allow to achieve a positive technical result.

Known control unit power load on the working bodies of the downhole motor, containing a sleeve with an axial flow channel that is set in the spring rotor with the possibility of axial movement, containing the nest step variable cross-section, of the mandrel for engagement with the socket associated with the housing is stationary (see, for example, U.S. patent No. 5,174,392 from 29.12.1992,, EW 4/02).

When the engine through the control unit power load on the working bodies is useless wasted without producing the work, part of the volume of washing liquid supplied to the engine. Increases downhole pressure and increase the pressure drop in the working bodies, sleeve and its socket slides over the mandrel and partially or completely blocks the flow channel control unit.

In this regard, the entire volume of drilling fluid under increased pressure is passed through the working bodies, increasing the load on the working bodies.

The disadvantage of this control unit power load on the working bodies is that with the ides with a sharp increase downhole load pressure in the working bodies and the control unit increases until, until the resistance to rotation is not overcome. This can continue until the complete stop of the engine. While washing fluid under exorbitant pressure deforms the rubber teeth of the stator and freely flows through the working bodies, any unproductive and prematurely destroying them.

Another disadvantage of the known control unit is the complexity of its design, which requires some additional knowledge, increased production and maintenance.

These and other disadvantages not make efficient use of known control unit power load on attachments that screw downhole motors and are an obstacle to their wider application.

Closest to the invention to the technical essence and the achieved technical result is the control unit of the power load on the working bodies containing the coupling with axial and radial flow channels that are installed in the axial flow channel coupling spring container with a jet nozzle that is installed with the possibility of axial movement of the mandrel of variable cross section, spring, seal movable and immovable joints (see, for example, patent No. 2205933, 15.11.2001, publ. 10.06.2003, bull. No. 16, P. EV 4/02).

This invention was made for prototip, because it resolved some major disadvantages inherent in the known nodes regulation power load on the working bodies of the downhole motor: operating mode, the entire volume of wash liquid supplied to the engine from mud pumps, served in the working bodies for doing work; the ultimate and transcendent modes, a large part of the washing liquid supplied to the engine is supplied to the control unit of the power load on the working bodies and unloads working bodies from unnecessary stress.

The disadvantage of this control unit power load on the working bodies is that it lacks the ability to pre-set the amount of the optimal power load on the working bodies of early regulatory efforts compression spring depending on the technical and energy characteristics of the downhole motor.

This does not allow full use of the power of each engine and to provide sufficient performance, reliability and durability of the downhole motor in a specific geological conditions.

Another disadvantage of the known control unit power load on the working bodies is that it comes with a set of bistronomic jetting nozzles, each with a different who offered the largest cross-sectional area of the flow channel. In terms of drilling and repair database this poses technical and organizational difficulties in keeping, picking and skillful use of jetting nozzles, the respective sizes and often technical services is ignored. This reduces the efficiency of regulation of the power load on the working bodies.

Also a disadvantage of the known control unit power load on the working bodies is that it does not exclude the possibility of mashing, cementation and jamming of the mandrel in the jetting nozzle due to the small radial clearance between the mandrel and the jetting nozzle, in which the sludge contained in the drilling fluid in the gap is deposited, cemented and connects the stationary mandrel and a jet nozzle, preventing flow of washing fluid.

These and other drawbacks of the known control unit power load on the working bodies do not allow to provide the necessary reliability and durability and reduce the possibility of its wide use in downhole motors in drilling oil and gas wells.

Objectives of the invention are the elimination of existing disadvantages of the known control unit power load on the working bodies and the possibilities for the establishment, change in Shiro is their limits and regulation of the power load on the bodies of workers at work, on the limit and beyond downhole loads, prevent intense abrasion, excess wear and tear and accidental damage of the working bodies, eliminating the ingress of slurry in the working bodies through the flushing holes in the bit at round-trip operations and ultimately increase the reliability and durability of the control unit of the power load on the working bodies and the downhole motor as a whole.

The tasks are solved due to the fact that the known control unit power load on the working bodies containing the coupling with axial and radial flow channels that are installed in the axial flow channel coupling spring container with hydrometeorol nozzle that is installed with the possibility of axial movement of the mandrel of variable cross section, spring, seal movable and immovable joints, according to the invention includes a hollow push nut mounted in axial flow channel coupling for engagement with a spring-loaded container and performed in the axial flow channel coupling the internal ledge or mandrel, and the mandrel is made in the form prescribed by the stock of replaceable tip;

- on the mandrel is made of hard end for engagement with the end of the jetting nozzles;

- spring is made in the de single one-piece unit privatkundenbank to each other Belleville springs.

In the proposed control unit power load on the working bodies allows overlapping channel flow up until the power load on the working bodies of the downhole motor reaches a certain, pre-specified acceptable conditions necessary reliability and sufficient durability values. Power load on the working bodies is a torque forces developed working bodies to overcome the drag torque of rotation of the bit, i.e. to overcome the downhole load.

Thus the entire volume of wash liquid from the mud pump to the engine, is sent to the working bodies for doing work. This ensures maximum efficiency of the energy features of the downhole motor.

Due to the fact that the proposed control unit power load on the working bodies of the downhole motor includes a coupling with axial and radial flow channels that are installed in the axial flow channel coupling spring container with a jet nozzle that is installed with the possibility of axial movement of the mandrel of variable cross section, spring, seal movable and immovable joints, in addition, contains a hollow push nut, have been fitted the Yu in the axial flow channel coupling for engagement with a spring-loaded container and performed in the axial flow channel coupling the internal ledge or mandrel, moreover, the mandrel is made in the form prescribed by the stock of replaceable tip, this is an opportunity to implement the purpose, i.e. is provided by periodic and operational control of the power load on the working bodies, the effective use of technology and energy capabilities of the downhole motor and prevent intense abrasion, excess wear and tear and accidental damage of the working bodies at the limit and beyond downhole loads.

Due to the fact that the proposed control unit power load on the working bodies on the mandrel is made of hard end for engagement with the end of the jetting nozzle, improved accuracy and precision operation and control of power load on the working bodies with a slight axial displacement of the jetting nozzle, prevents clogging, jamming and cementation of the mandrel and jetting nozzles, the control unit power load on the working bodies persists longer in a healthy state.

Due to the fact that the proposed control unit power load on the working bodies of the spring is made as a single integral unit privatkundenbank to each other Belleville springs, are saving for a longer period of work is capable of host state regulation through prevention of the ingress and accumulation of sludge in the unit disc springs and exclude their possible cracking at elevated strain in connection with a significant increase the modulus of elasticity of the rubber with significant joint with disc springs deformations of the rubber.

Thus, the implementation of the distinctive features in conjunction with the known in the proposed control unit power load on the working bodies creates the opportunity to eliminate the disadvantages inherent in the known control unit power load on the working bodies and to enable the establishment, changes within wide limits and regulation of the power load on the working bodies at work, at the limit and beyond downhole loads, prevent intense abrasion, excess wear and tear and accidental damage of the working bodies, prevent ingress of slurry in the working bodies through the flushing holes in the bit at round-trip operations and, ultimately, improving the reliability and durability of the node regulation of the power load on the working bodies and the downhole motor as a whole.

To clarify the essence of the present invention presents a drawing showing the control unit of the power load on the working bodies. Longitudinal section.

Thin dash-dotted lines depict the working bodies of the downhole motor in the place of installation of control unit power load on the working bodies. Longitudinal section

Control unit power load on the working bodies can be installed in the shaft of the turbine of the turbo-drill.

Control unit power load on the working bodies of the downhole motor includes a coupling 1 with a radial flow channels 2 and axial flow channel 3, installed in the axial flow channel 3 of the coupling 1 spring container 4 with a jetting nozzle 5 mounted with the possibility of axial movement of the mandrel 6 of variable cross section, the spring 7, the seal movable joints 8 and static seals 9. Control unit power load on the working bodies also contains a hollow push nut 10 mounted in an axial flow channel 3 of the coupling 1 to interact with a spring-loaded container 4 and is made in the axial flow channel 3 of the coupling 1 internal ledge 11 or mandrel 6 and the mandrel 6 is made in the form mounted on the rod 12 replaceable tip 13. The mandrel 6 is made of hard edge 14 to communicate with the end face 15 jetting nozzles 5.

In the control unit of the power load on the working bodies of the spring 7 is made as a single integral unit privatkundenbank to each other Belleville springs. The mandrel 6 is fixed to the rod 12 and has the ability to thread 16 with the container 4 or independently move in the OS is the first direction relative to the coupling hub 1.

Control unit power load on the working bodies is installed in the rotor 17 of the working bodies (in the drawing shown in phantom lines) and secured on the threads 18 of the coupling 1 tightly.

Working bodies include the rotor 17 and the stator 19 and together with the control unit of the power load on the working bodies form a cavity 20 of high pressure and the cavity 21 of the low pressure sealing cavity seals 9 fixed connections made in the form of rubber rings.

Jetting nozzle 5 is of mineralokeramiki, made of metal or of metal with a wear-resistant coating.

The mandrel 6 with variable cross-section is metal coated carbide composite materials.

In the proposed control unit power load on the working bodies of the downhole motor may be other versions of parts and assemblies.

Works control unit power load on working bodies, as follows.

When assembling the control unit power load on the working bodies of rotation of the hollow push nut 10 moves the container 4 to the contact of its end with an internal ledge 11 of the coupling 1. Then, further rotating hollow push nut 10 and compressing the spring 7 by a certain amount, press the container 4 to the inner ledge 11 of the coupling 1 with gain is eating, ensure the maintenance of possible optimal pressure drop in the working bodies corresponding to the operation of the downhole motor on a cost effective modes ranging from maximum efficiency to maximum capacity without resetting the flush fluid through the control unit power load on the working bodies. The optimum differential pressure on the working bodies established on the basis of the energy capacity of the downhole motor. This is the first stage of power regulation load on working bodies, providing a better use of the potential of the downhole motor with its high reliability, sufficient durability and economic efficiency.

When the control unit power load on the working bodies of washing fluid under pressure is fed into the working bodies in the cavity 20 of the high pressure in the radial 2 and 3 in the axial flow channels. Increases downhole load pressure drop in the working bodies, and hence between the cavity 20 and high pressure cavity 21 of the low pressure increases until, until you reach the optimal value, installed during Assembly of the control unit.

Further vozrastnoi the downhole load leads to an increase in pressure differential between the cavities 20 and 21, respectively, high and low pressure overcoming the force of the compression spring 7, the axial movement of the container 4 with the jetting nozzle 5 down and the education gap between the thrust end face 14 of the mandrel 6 and the end face 15 jetting nozzles 5.

Washing fluid under pressure flows through the formed fluid channel in the control unit of the power load on the working bodies in the axial flow passage of the hollow rotor 17 through a jet nozzle 5, a spring 7 and a hollow push nut 10. As a result, the pressure drop in the working bodies of the reduced, reduced power load on the bodies of workers, decreases the amount of drilling fluid flowing through the working bodies.

In this regard, the working bodies are exempt from the limit and beyond power loads, reducing friction, wear and possible breakage and working bodies will be to stay longer in working condition. This can be achieved best performance of the working bodies.

With the dramatic increase in downhole load, for example when moving the drill bit into the formation to a greater or lesser viscosity, or when unexpected bit jamming pressure drop in the working bodies increases abruptly and washing fluid under pressure acts on the container 4 with the jetting nozzle 5, moves it down and to overcome the Wake of the resistance of the spring 7, instantly opens a flow channel between the thrust end face 14 of the mandrel 6 and the end face 15 jetting nozzles 5. While a large part of the washing fluid flowing into the engine under high pressure is discharged into the cavity 21 of the low pressure.

The pressure drop in the working bodies decreases sharply, and working bodies are exempt from congestion: the rotor 17 and the stator 19 is no longer exposed to heavy abrasion, increased wear and emergency destruction and remain in a healthy state.

This is the second stage of power regulation load on working bodies, preventing the possibility of intense friction, increased wear and emergency destruction of working bodies at work, at the limit and beyond downhole loads.

When performing drilling screw downhole motors, in the event of unforeseen changes in geological conditions, there is a need to improve the rigidity of the power characteristics of the engine. For this purpose, the control unit power load on the working bodies include the ability to modify previously established optimal power load on the working bodies by increasing the force pressing the thrust end face 14 of the mandrel 6 to the end face 15 jetting nozzles 5 to the efforts of the relevant work is E. the downhole motor at the maximum power mode. For this purpose, the rotation of the stem 12 and the screw 16, the mandrel 6 is moved down by a certain amount. When the spring 7 is compressed and increases the contact force of the end 14 of the mandrel 6 to the end face 15 jetting nozzles 5.

This is the third step in the regulation of the power load on the working bodies, making it possible to increase the load capacity of the working bodies from the optimal to the maximum mode of operation of the downhole motor.

If necessary, mitigate the energy characteristics of the downhole motor to drill enough to turn the rod 12 and the screw 16 and to raise it at some particular value for the formation of a gap (flow channel) between the thrust end face 14 of the mandrel 6 and the end face 15 jetting nozzles 5. Thus, some portion of the volume of drilling fluid is free to flow through the control unit, bypassing the working bodies, and to mitigate the energy characteristic of the engine at each operation of the downhole motor.

This is the fourth stage of the regulatory power load on the working bodies responsible for the work of the working bodies on sparing modes with reduced power load on working bodies.

Due to the fact that the proposed control unit power load working on the e bodies contains hollow push nut 10, mounted in axial flow channel 3 of the coupling 1 to interact with a spring-loaded container 4 (with jetting nozzle 5) and performed in the axial flow channel 3 of the coupling 1 internal ledge 11 or turf 6 and the mandrel 6 is made in the form mounted on the rod 12 replaceable tip 13 is achieved and implemented the ability to install the optimal value of the compression force of the spring 7, the corresponding economically viable power load on the working bodies of the downhole motor, providing pressure relief washing liquid from the cavity 20 of high pressure in the cavity 21 of the low pressure (when reaching this value) and reduce power load on working bodies with further increase downhole load. When this is implemented the ability to quickly replace worn or emergency washed replaceable tip 13 directly on the rig. This ensures the achievement of the technical result: the implementation of the assignment, which consists in the regulation of the power load on the working bodies in achieving optimal power loads on the bodies of workers, reducing power loads with further increase downhole load and preventing intense abrasion, wear and accidental damage parts and the downhole motor in a is m Due to the fact that the proposed control unit power load on the working bodies on the mandrel 6 is made of hard edge 14 to communicate with the end face 15 jetting nozzles 5, created and implemented the possibility to block the flow passage end surface and with a slight excess in the Assembly of the optimal power load on working bodies, the control unit increases the area of orifice flow channel formed between the thrust end face 14 of the mandrel 6 and the end face 15 jetting nozzles 5 and resets certain amount of washing fluid from the cavity 20 of high pressure in the cavity 21 of low pressure, which lowers the pressure drop working organs, reduced power load on the bodies of workers, decreases the possible wear of the rotor 17 and the stator 19, improves reliability and durability.

Due to the fact that the proposed control unit power load on the working bodies of the spring 7 is made as a single integral unit privatkundenbank to each other Belleville springs, achieved protection of the Belleville springs from exposure to drilling fluid, prevents sludge in placements Belleville springs and eliminates the possibility of cracking of the Belleville springs in the marginal and not the additional downhole loads.

In the control unit of the power load on the working bodies of the seals 8 movable joints ensure the tightness of the container 4 in the coupling 1 and reduce the seepage of drilling fluid from the cavity 20 of high pressure in the cavity 21 of the low pressure seal 9 immovable joints seal parts and the site in General in the rotor 17.

Thread 18 is used to connect and mount the coupling hub 1 in the hollow rotor 17.

When changing downhole load and pressure drop in the working bodies in the process of drilling wells, the regulation of the power load on the working bodies is carried out automatically.

Automatic regulation of the power load on the working bodies is as follows.

Power load on the working bodies largely depends on downhole load and is controlled by the differential pressure on the working bodies.

Under the influence of increasing, above the established optimal pressure differential in the working bodies associated with increased downhole load, the container 4 with the jetting nozzle 5 moves down and compresses the spring 7. However, the thrust end face 14 of the mandrel 6 and the end face 15 jetting nozzles 5 a gap, which increases the pressure drop in the working bodies increases, increasing the cross-sectional area of flow is the anal. As a result, the flow of washing fluid through the control unit power load on the bodies of workers increases, and through working bodies is reduced, this reduces the frequency of rotation of the bit and reduces the amount of drilling cuttings, improved flushing and cleaning downhole drilling and decreases downhole load. And as a result, reduced pressure drop and reduced power load on working bodies.

Due to the reduced pressure drop in the working bodies, caused by the decrease downhole load, the container 4 with the jetting nozzle 5 under the action of the spring 7 rises, and the value of the cross-sectional area of the flow channel is reduced or the flow channel is blocked completely.

As a result, the flow of washing fluid through the control unit power load on the working bodies decreases, causing an increase in the flow of washing fluid through the working bodies.

The frequency of rotation of the hollow rotor 17 and the bit increases, increasing the number of drilling cuttings and restored specified by the control unit of the power load on the working bodies of the mode of operation of the downhole motor.

Thus, the implementation of the distinguishing features of the proposed control unit power load on the working bodies of the downhole movement is the motor in combination and in conjunction with the known, creates the opportunity to eliminate the disadvantages inherent in the known control unit power load on working bodies, and to achieve a positive technical result of the implementation of the assignment:

- created the possibility of establishing, changes within wide limits and periodic and operational regulation of the power load on the working bodies at work, at the limit and beyond downhole loads;

- prevent intense abrasion, excess wear and tear and accidental damage of the working bodies and the preservation for a longer period of control unit power load on the working bodies and the whole of the downhole motor in a healthy state;

- improving the performance of the downhole motor by reducing unproductive losses of drilling fluid and more efficient use of energy resources of the engine while increasing the reliability and durability;

- avoid contact of the sludge in the working bodies through the flushing holes in the bit at round-trip operations and ultimately increase the reliability and durability of the control unit of the power load on the working bodies and the downhole motor as a whole.

All this allows to reduce losses and to reduce nepresso is sustained fashion the flow of washing fluid, to improve performance, reliability and durability, to reduce production costs of drilling oil and gas wells, to improve the economic efficiency of the control unit of the power load on the working bodies of the downhole motor, i.e. allows to solve in the invention of the task.

1. Control unit power load on the working bodies of the downhole motor, containing a coupling with axial and radial flow channels that are installed in the axial flow channel coupling spring container with a jet nozzle that is installed with the possibility of axial movement of the mandrel of variable cross section, spring, seal movable and immovable joints, characterized in that it contains a hollow push nut mounted in axial flow channel coupling for engagement with a spring-loaded container and performed in the axial flow channel coupling the internal ledge or mandrel, and the mandrel is made in the form prescribed by the stock of replaceable tip.

2. The node according to claim 1, characterized in that the mandrel is made of hard end for engagement with the end of the jetting nozzle.

3. The node according to claims 1 and 2, characterized in that the spring is made as a single integral unit privatkundenbank to each other that alcatech springs.



 

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2 dwg

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 1502C, 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 khw, 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

Face engine // 2248436

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

Gear mechanism // 2250340

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.

4 dwg

Boring rig // 2255194

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.

1 dwg

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.

3 dwg

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.

5 dwg

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