Downhole motor

 

The invention relates to downhole motors to drive the rock cutting tool during drilling. The invention consists in that the engine includes a layout equivalent, installed with the annular clearance within the cylindrical body and connected by a screw-values, multi-blade turbines, each of which consists of a profiled stator on the inner cylindrical surface which is evenly spaced protrusions with the smooth profile of the lifting plane and coaxially installed in contact with the tops of the protrusions shaped toroidal stator rotor with made it a hub with slots, providing a telescopic connection toroidal multi-blade rotors of turbines, and the layout is equipped with a Central high-pressure injection channel, the channels of reduced pressure in the profiled stator and the radial channels in the toroidal rotor, United with the working cavity channels in the blades, number of blades multi-blade turbine per unit is greater than the number of protrusions shaped stator, and multi-blade turbine is installed with the possibility of rotation of posredstvo efficiency. 3 Il.

The invention relates to the mining industry, in particular to a downhole motors to drive the rock cutting tool for drilling oil and gas wells.

Known turbodrill (see and.with. The USSR №1680918 class. E 21B 4/02 from 14.06.89, publ. 30.09.91,, bull. No. 36) includes housing, shaft and stages of turbines, consisting of working bodies of stators and rotors, made in the form of blade rims with stoppers, interacting with a groove made in the inner surface of the housing along a helical line, the direction of which coincides with the direction of the average angle of inclination of the profile of the blades of the crown of the working body and the retainer are made in the form of a plate mounted on the crown at an angle identical to the angle and direction of the helical grooves.

The disadvantage of this turbodrill is that, given the large number of blades of the rotor, the total moment is created only part of the pressure of the pressurized fluid circulation, while the force of the pressure decreases due to the resistance of each of the rotor blades multi-stage turbine of the turbo-drill, and therefore the output of the minor.

Known bulk downhole motor (see patent of Russia № 2049902 M CL6E 21 4/02 from 12.07.89, opalanie on the transverse working chamber walls with channels for the passage of fluid, the rotor through grooves in which are placed movable in the diametrical directions of the spring blades, and the stator in each cell is made in the form of poluchulki, solid length and cross section, and the input channel in the working chamber is made in polustelka along its entire length, as part of its cutoff diameter and forming an output channel in the form of a cutout in the bottom corner portions of the input edges of the stator and aligned with the vertical channel walls, sequentially connecting the working chamber, the rotor blades are in the same axial plane and is made in two halves, between which is mounted an adjusting strip, poluchulki associated with the inner surface of the housing and without a gap by means of bolts and rotated one relative to the other by 180.

The disadvantage of this downhole motor is that the rotation of the output shaft is provided with a power point, only one blade, and at the moment the location of the spring-loaded blades along the line of incision poluchulki when the rotation of the turbine dead zone occurs while idling speed of the blade is 180and it indicates a lack of power is in the shadow is a downhole motor (see A. with. The USSR №470581 class. E 21 3/12 15. 05.75, publ. 14.08.75, bull. No. 18), comprising a cylindrical housing having a vertical discharge and drain channels with fixed therein shaped stator is divided into a transverse chamber having two longitudinal box, respectively communicated with injection and drain channels, and speed rotor movably mounted in its diametrically through the slots of the blades, while the grooves in the rotor is constructed at an angle to one another, and the angle of rotation is proportional to the number of stages of the rotor.

The disadvantage of this downhole motor is that the rotation of the output shaft is provided, the total force moment of the transverse chambers in which torque is created by the power in-line hydraulic pressure acting on the area of one of the movable blades, and it operates only during the half-turn rotation of the shaft, i.e., 180and the next half turn of idling refers to losses and account for 50% of the total losses, which indicates low engine power and low performance.

The present invention is to increase the value of the total moment downhole motor and its kpmi it shaped stators, divided into transverse working chamber walls, a rotor with grooves in which are placed movable in radial directions of the blade, an output shaft connected to a rotor, the upper and lower subs, according to the invention, the engine includes attached to the top sub layout equivalent, installed with the annular clearance within the cylindrical body and connected by a screw-values multi-blade turbines, each of which consists of a profiled stator on the inner cylindrical surface which is evenly spaced protrusions with the smooth profile of the lifting plane, and coaxially installed in contact with the tops of the protrusions shaped toroidal stator rotor with made it a hub with slots, providing a telescopic connection toroidal multi-blade rotors of turbines, and the layout is equipped with a Central high-pressure injection channel, the channels of reduced pressure in the profiled stator and the radial channels in groupassum rotor connected with the working cavity channels in the blades, number of blades multi-blade turbine per unit is greater than the number of protrusions shaped statho power point of each blade.

In Fig.1 shows a downhole motor, General view.

In Fig.2 - section a-a in Fig.1.

In Fig.3 - section b-B in Fig.1.

Downhole motor comprises a cylindrical housing 1 in which is installed with an annular gap 2 layout equivalent multi-blade turbines 3, connected by a screw-values 4, further performing the role of partitions. The annular gap 2 is limited to the upper sub 5 and the lower sub 6. Multi-blade turbine 3 comprises a shaped stator 7, on the inner cylindrical surface of which is made evenly spaced projections 8 with the smooth profile of the lifting plane and toroidal rotor 9 with uniformly spaced radial slots 10, which contained the movable blade 11 (see Fig.2). The diameter of the toroidal rotor 9 corresponds to the bore diameter of the peaks of the protrusions 8 shaped stator 7, the number of blades 11 is greater by one than the number of protrusions 8 (see Fig.2). On groupassum the rotor 9 is cylindrical hub 12 with the slots 13, providing a telescopic connection toroidal rotor 9 and the transfer of the total torque to the output shaft 14 that is attached to the threaded end cap 15 taroob the em to shift the position of the one turbine blade 11 on the estimated angle relative to the other, that ensures smooth rotation, taking into account idling. On profiled stator 7 of the lower multi-blade turbine 3 has a threaded pallet 16. Threaded pallet 16, the threaded axle boxes 4 and top sub 5 provided with anti-friction radial bearings 17, and between the tray 16 and the annular stop 18 of the output shaft 14 is installed thrust bearing 19. The tightness of the output shaft 14 is provided o node 20. The layout of the multi-blade turbine 3 is supplied with high-pressure Central discharge channel 21, the radial channels of the rotor 22, which are connected with the working cavity 23 of the vane channels 24, and channels of low pressure stator 25. In the output shaft 14 is made of radial holes 26 for fluid circulation.

Downhole motor operates as follows.

Injected through the Central discharge channel 21, the working fluid enters the working cavity of each multi-blade turbine 3 through radial channels toroidal rotor 22. Movable blades 11 under the action of pressure fluid on its rear end moved in the radial groove 10 to contact with the inner cylindrical surface shaped stator 7. Through the ow channels is indoor cylinder shaped stator 7. The pressure of the working fluid on the area of the protruding section of each blade 11 creates the total torque, providing rotation of the multi-blade turbine 3. While idling turbine blade 3 is equal to the width of the top of the ledge 8. The total moment of rotation of the downhole motor is equal to the sum of the torques multi-blade turbine 3.

This solution will improve the basic characteristics of the downhole motor (torque, power, efficiency, etc. and accordingly the performance of drilling (drilling, commercial speed and others) when vertical and horizontal directional drilling of oil and gas wells.

Claims

Downhole motor, containing a cylindrical housing with fixed therein shaped stators divided by transverse working chamber walls, a rotor with grooves in which are placed movable in radial directions of the blade, an output shaft connected to a rotor, the upper and lower subs, characterized in that the engine includes attached to the top sub layout equivalent, installed with the annular clearance within the cylindrical body other stator, on the inner cylindrical surface which is evenly spaced protrusions with the smooth profile of the lifting plane and coaxially installed in contact with the tops of the protrusions shaped toroidal stator rotor with made it a hub with slots, providing a telescopic connection toroidal multi-blade rotors of turbines, and the layout is equipped with a Central high-pressure injection channel, the channels of reduced pressure in the profiled stator and the radial channels in the toroidal rotor connected with the working cavity channels in the blades, number of blades multi-blade turbine per unit is greater than the number of protrusions shaped stator, and multi-blade turbine is installed with the possibility of rotation by the total power of the moment of each blade.

 

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