Gyratory hydraulic motor

 

(57) Abstract:

The invention relates to hydraulic actuators for rotary movement, in particular to devices for drilling directional wells. The inventive hollow rotor and the spindle motor are connected by a threaded adapter to the drive shaft, provided with the master and the slave hinge nodes, threaded adapter rotor connected to the drive shaft and the hollow rotor from the side of the entrance to the gyratory mechanism of the fluid flow, thus leading hinge shaft is located upstream from the entrance gyratory mechanism or downstream directed to the spindle end of the threaded adapter of the rotor. The invention allows to reduce the length of the engine while maintaining or increasing the length of the drive shaft, and to increase the resource gyratory mechanism of the engine due to the reactive torque on the rotor in the center of deflection of the spindle section leading swivel hub of the drive shaft. 5 Il.

The invention relates to hydraulic actuators for rotary movement, in particular to devices for drilling directional wells.

Known downhole drilling motors shall fight in the top, and spindle section, a housing which is connected to the motor housing section sub [1]. In the known construction the engine is equipped with a hinged hub, kinematically connected with the driven part of the torsion bar and the spindle section, with the hinge unit is designed in the form of a clutch, placed the upper part of the slot in the torsion bar coupling with an opening in which is placed the lower part of the clutch, and placed in two mutually perpendicular planes of fingers mounted in holes formed in the torsion bar, the coupling and the coupling, and the holes torsion and coupling, in which is placed a sleeve, and the ends of the coupling is made with a conical sections.

A disadvantage of the known design is the limitation in the transmission of torque, reducing the reliability and durability of the torsion due to higher radial loads on the hinge site that is hosted on the slave edge of torsion. Another disadvantage of the known construction is incomplete use of the possibility of reducing the length of the engine by increasing the variation in spindle section and save the moment on the rotor. This limits the possibility of more intensive Zenith angle changes with the passage of the wellbore, CLASS="ptx2">

Closest to the claimed design is a gerotor motor, comprising a housing placed inside this enclosure multiple gyratory mechanism comprising coaxially located stator and mounted inside the stator, the rotor and the spindle is directly connected to the drive shaft with the rotor and placed inside the spindle, and the motor housing and the spindle are connected by a bent sub with threads on its edges, and the rotor and the spindle is connected to the drive shaft by threaded couplings [2].

A disadvantage of known construction is incomplete use of the possibility of reducing the length of the engine with a larger deflection angle of the spindle shaft relative to the gerotor motor. It is not possible to increase the permeability of the engine, i.e. the ability to pass through unhindered wells with greater curvature, for example with the intensity change of the Zenith angle during the drilling of wells up to values of 4 to 10o10 metres of shaft sinking.

Another disadvantage of the known construction is incomplete use of opportunities to increase resource gyratory mechanism of the engine due to the reactive torque on the rotor in the center of the group which seeks the invention, is to reduce the length of the gyratory motor while maintaining or increasing the length of the drive shaft for the intensity change of the Zenith angle for drilling up to values of 4 to 10o10 metres of drilling a curved borehole by connecting the threaded adapter of the rotor to the drive shaft and the hollow rotor from the side of the entrance to the gyratory mechanism of the fluid flow.

Another technical challenge is to improve resource gyratory mechanism of the engine due to the reactive torque on the rotor in the center of deflection of the spindle section leading swivel hub drive shaft and reduction netsentralnoe profiles on the edges of the rotor when the planetary rolling stator.

The essence of the technical solutions is that in a gerotor hydraulic motor, containing a hollow body placed inside multiple gyratory mechanism comprising coaxially located stator mounted within the hollow stator, the rotor and the spindle, the rotor and the spindle are connected by a threaded adapter to the drive shaft, provided with the master and the slave hinge nodes, according to the invention the threaded adapter rotor connected with the drive shaft and hollow the CSOs shaft is located upstream from the entrance gyratory mechanism or downstream directed to the spindle end of the threaded adapter of the rotor.

The threaded connection adapter of the rotor to the drive shaft and the hollow rotor from the side of the entrance to the gyratory mechanism of the fluid flow reduces the length of the gyratory motor while maintaining or increasing the length of the drive shaft, improves flow of the engine in a curved borehole and increases the intensity change of the Zenith angle to values of 4 to 10o10 metres of drilling a well. This embodiment allows to reject the spindle relative to the slave connected to spindle center deflection pivot point of the drive shaft for greater compared with the known design angle with a smaller length of the gerotor motor and spindle sections. This is achieved by the reactive torque on the rotor in the center of deflection of the spindle section leading swivel hub of the drive shaft, as well as the improved alignment of the profile input part of the rotor during its planetary running inside the stator and reduce the relative sliding velocity of conjugate profiles of the rotor and stator.

The leading location as the pivot point of the drive shaft upstream from the entrance gyratory mechanism increases the diameter of the leading exoskeleton more bore holes Polo is th node of the drive shaft. In addition, this arrangement leading exoskeleton increases the wear resistance of the gyratory mechanism by reducing netsentralnoe profile input part of the rotor during its planetary running inside the stator and reduce the relative sliding velocity of conjugate profiles of the rotor and stator.

The location of the host exoskeleton downstream directed to the spindle end of the threaded adapter of the rotor reduces the length of the gyratory motor and spindle sections while maintaining the length of the drive shaft. This allows even more in comparison with the known design to increase the deflection angle of the spindle section of the engine relative to the housing (stator) of the motor, to improve the patency of the engine in a curved borehole during drilling, as well as to increase the intensity change of the Zenith angle for drilling up to values of 4 to 10o10 metres of drilling a well.

In Fig. 1 shows a longitudinal section of a gerotor motor, leading hinge which is located upstream from the entrance of the gerotor mechanism.

In Fig. 2 shows the element I in Fig.1: leading hinge is located upstream from the entrance of the gerotor mechanism.

Fig is directed at the spindle end of the threaded adapter of the rotor.

In Fig.4 shows the element II in Fig.3: leading hinge is located below the flow directed to the spindle end of the threaded adapter of the rotor.

In Fig.5 shows a cross section a-a gerotor motor.

Below are the most preferred variant gyratory motor.

Gyratory hydraulic motor consists of two sections - the motor 1 and the spindle 2 and includes a hollow body 3 placed inside multiple gyratory mechanism comprising coaxially located stator 4 and placed inside the hollow stator, the rotor 5 and the spindle 6, is located inside the housing 7. The hollow rotor 5 and the spindle 6 is connected to a threaded adapter 8 and 9 to the drive shaft 10, provided with a leading swivel hub 11 and a driven hinge node 12. Threaded adapter 8 of the rotor 5 is connected to the drive shaft 10 and a hollow rotor 5 on the input side 13 in the gyratory mechanism of the thread 14 of the fluid (see Fig.1). Leading hinge 11 of the drive shaft 10 may be located upstream 14 from the entrance 13 gyratory mechanism (see Fig.2).

At least part of the 15 leading the pivot point 11 of the drive shaft 10 may be located upstream 14 from the 5 is located above the stream 14 from the entrance 13 gyratory mechanism (see Fig.3).

In addition, in Fig.1 and 3 shown: 18 - center deviation of the slave pivot point 12 of the spindle section 2 relative to the propulsion section 1; POS. 19 - radial upper and lower spindle bearings 6; Ref. 20 - axial spindle bearing 6 inside the housing 7. In Fig.2 and 4: POS. 21 - balls leading the pivot point 11; Ref. 22 and 23 nodes spherical axial bearing end of the drive shaft 10 in the tip 24 of the leading exoskeleton 11; Ref. 25 - sealer leading the pivot point 11.

Gyratory hydraulic engine works as follows: washing fluid under pressure to the column of drill pipe is applied to the input 13 of the gyratory mechanism in the screw channels between the rotor 5 and the stator 4. Emerging on the rotor 5 torque causes the planetary rotation within the stator 4 that by leading the pivot point 11, the drive shaft 10, the slave pivot point 12 is converted into rotation of the spindle 6, is located inside the housing 7 in the bearings 19 and 20. The direction of rotation of the spindle 6 is opposite the planetary running of the rotor 5 and the stator 4.

When drilling heterogeneous rocks on the spindle 6 occurs reactive bending moment due to the cutting force on the bit (not shown). The above is 2 relative to the propulsion section 1. When connecting threaded adapter 8 of the rotor 5 on the input side 13 in the gyratory mechanism of the thread 14 of the current environment, leading hinge 11 of the drive shaft 10 is located above the stream 14 from the entrance 13 gyratory mechanism that reduces netsentinel profile input part of the rotor 5 when the planetary running it inside the stator 4, reduces wear gyratory mechanism by reducing the relative sliding velocity of conjugate profiles of the rotor 5 and the stator 4.

The proposed design of the gyratory motor reduces its length and increases the length of the drive shaft increases permeability in wells with high curvature, and also increases the resource gyratory mechanism by reducing the relative sliding velocity of conjugate profiles of the rotor and stator.

Sources of information

1. RU, patent 2081986, CL E 21 In 4/02, 1993.

2. RU, patent 2149971, CL E 21 In 4/02, 7/08, 1999.

Gyratory hydraulic motor, containing a hollow body placed inside multiple gyratory mechanism comprising coaxially located stator mounted within the hollow stator, the rotor and the spindle, the rotor and the spindle are connected by a threaded adapter with privy connected to the drive shaft and the hollow rotor from the side of the entrance to the gyratory mechanism of fluid flow, while leading hinge shaft is located upstream from the entrance gyratory mechanism or downstream directed to the spindle end of the threaded adapter of the rotor.

 

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FIELD: oil and gas extractive industry.

SUBSTANCE: device has metallic hubs of stator and rotor, wherein crowns of stator and rotor are concentrically pressed. Crowns of stator and rotor are made of durable ceramics and are additionally equipped with connections, allowing to exclude non-controlled turning of crowns in hubs and spontaneous axial displacement thereof.

EFFECT: higher reliability and efficiency.

2 dwg

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