Downhole hydraulic motor

 

The invention relates to the drilling of directional wells, in particular to a hydraulic downhole motors with turbine diverters. The invention consists in that the motor containing hollow body placed inside the drive rotor and spindle mounted inside the spindle for axial and radial bearings with chisel and coupled to the driving shaft with the rotor, and the motor housing and the spindle are connected by curved threaded subs, and the rotor and the spindle is connected to the drive shaft, provided with the master and the slave hinge nodes with axial bearings slip through threaded adapter spindle body with cross-connector between axial and radial support from the side of the bit, the spindle is made with an annular groove in the plane of the transverse connector housing of the spindle, in the groove installed split ring whose diameter exceeds the diameter of the spindle, inside the fixed spindle supporting sleeve and the ring-car safety and radial bearing housing spindle with hand chisels made in the form posted on the removable sleeve and secured inside the spindle elastic sliding bearing, and rest opportunities downhole motor, reduces the length of the BHA, increases the life and reliability of the downhole motor. 2 Il.

The invention relates to the drilling of directional wells, particularly to downhole motors with turbine diverters.

Known downhole motor, containing a hollow body placed inside the drive rotor and spindle mounted inside the spindle for axial and radial bearings, threaded for attachment of the bit and connected to the driving shaft with the rotor. Moreover, the housings of the motor and spindle are connected by curved threaded subs, and the rotor and the spindle is connected to the drive shaft swivel [1].

A disadvantage of the known turbine diverter is the low resistance of the host of the curvature of the connection shaft of the lower and upper sections of the whipstock.

In the known construction the turbine section of the turbo-drill required axial force bearing rotation for the perception of the reaction of the bottom hole, see Fig.2.11 page 44 [1]. This complicates the design of the turbodrill, increases its length, does not provide increased life and reliability axial support of the rotor of the mud motor due to placing it in the mud, and Bolsa curvature.

Known spindle-diverter containing section of the screw working pair and a spindle section, consisting of an upper part with a defined set of axial and radial bearings and lower sastavci, shafts which are interconnected jaw coupling [2].

In the known construction by reducing the length of sastavci by bringing radial support to the bottom hole it is mounted in a threaded nut, and to transfer axial loads and reduction reactions of the face bearing on the Cam coupling have hard edges. A disadvantage of the known construction is the low resistance of the host curvature and not enough high spindle-standoff due to the large bending stresses radial bearings in nipple nut with hand chisels, deterioration and / or destruction of Cam coupling node of curvature and radial bearings due to contact with mud.

Closest to the claimed design is the design of hydraulic downhole motor, containing a hollow body placed inside the drive rotor and spindle mounted inside the spindle for axial and radial bearings with chisel and coupled to the driving shaft with the rotor, prey to the drive shaft, equipped with the master and the slave hinge nodes with axial bearings slip through threaded adapter [3].

A disadvantage of the known designs is a scarce resource gyratory hydraulic motor, drive shaft and spindle Assembly. However, when using instead of the gerotor hydraulic motor multicell turbodrill increases the length of the BHA. Known turbine diverters without own power axial bearing is not used, see for example [1].

The technical problem on which the invention is directed, is to reduce the length of the BHA, increasing the life and reliability of the downhole motor by using as a drive multiple turbodrill without own power axial bearings of the motor rotor, the use of articulated axial bearings shortened drive shaft, reliability deduction of cut spindle ring-the safety of the axial spindle bearings in the transverse connector housing of the spindle.

Another technical challenge is the maximum approximation of the radial bearing to the bottom of the wells, the reduction reaction of the bottom hole on the supports when using the multi-stakeholder who is in hydraulic downhole motor, containing a hollow body placed inside the drive rotor and spindle mounted inside the spindle for axial and radial bearings with chisel and coupled to the driving shaft with the rotor, and the motor housing and the spindle are connected by curved threaded subs, and the rotor and the spindle is connected to the drive shaft, provided with the master and the slave hinge nodes with axial bearings slip through threaded adapter, according to the invention, the spindle body with cross-connector between axial and radial support from the side of the bit, the spindle is made with an annular groove in the plane of the transverse connector housing of the spindle, in the groove installed split ring whose diameter exceeds the diameter of the spindle, inside the fixed spindle supporting sleeve and the ring-car safety and radial bearing housing spindle with hand chisels made in the form posted on the removable sleeve and secured inside the spindle elastic sliding bearing, the distance between the axial bearings of the drive shaft does not exceed the length of the axial bearing of the spindle.

The execution of the body of the spindle cross this at all connector housing of the spindle, and install in the groove of the split ring, the diameter of which exceeds the diameter of the spindle, fixing inside the spindle supporting sleeve and ring of the safety device allows the use of the axial sliding bearing of the drive shaft as the power poles of the rotor speed rotary drills, to improve the reliability of holding the cut portion of the spindle, and also to reduce the length of the BHA, to increase the reliability and life of the downhole motor.

This is due to the fact that in the known turbine power diverters axial support of the rotor of the feet turbodrills placed in the pressure fluid mud, as in the proposed design - in oil-filled cavity axial bearing of the spindle.

For the radial bearing housing of the spindle by bit as posted on the removable sleeve and secured inside the spindle elastic sliding bearing simplifies the adjustment of the axial clearance in rotary speed rotary drills, prevents damage to the axial and radial bearings when mounting the spindle support sleeve and split (Meridian plane) by a ring-car safety.

The implementation of the distance between the axial bearings of the drive shaft, not exceeding the length of orabura and spindle, reduces netsentinel hinge units of the drive shaft in its axial slide bearing relative to the axis of the curved adapter, and also minimizes the axial movements of the rotor speed turbodrills when changing the reaction of the bottom hole during the drilling process, mainly when the azimuthal component of efforts on the bit changes sign.

In Fig.1 shows a longitudinal section of a hydraulic downhole motor section of the turbodrill.

In Fig.2 shows the element I in Fig.1: the spindle body with transverse connector between axial and radial support by fastening bits.

Hydraulic downhole motor includes a hollow body 1 placed inside the drive turbine rotor 2 on the radial slide bearing 3 and 4, and the turbine stator 5 and the spindle 6 mounted inside the spindle 7 in the radial slide bearing 8, 9 and the axial bearing of the slide 10.

The spindle 6 is supplied with the adapter 11 for fastening the drill bit (not shown) and is connected to the driving shaft 12 with the rotor 2. The motor housing 1 and the housing of the spindle 7 is connected curved threaded subs 13, 14, and the rotor 2 is connected with the drive shaft 12 of the conical-spline clutch 15. The drive shaft 12 provided with a lead ball is 2 and the spindle 6 by means of threaded adapters 20, 21. The spindle body 7 is made integral with a transverse slot 22 between the axial sliding bearing 10 and the radial sliding bearing 9 from the side of the adapter 11 for fastening bits, see Fig.1.

The spindle 6 is made with an annular groove 23 in the plane of the transverse connector housing 22 of the spindle 7. In the groove 23 is set to split (consisting of half-rings) ring 24, the diameter of which exceeds 25 diameter 26 of the spindle 6, see Fig.2.

Inside the spindle 7 is fixed supporting sleeve 27 and the ring-the safety device 28, and the radial bearing 9 of the housing of the spindle 7 from the side of the adapter 11 for attachment of the bit is made in the form posted on the removable sleeve 29 and is fixed inside the housing of the spindle 7 elastic sliding bearing 30, see Fig.2.

The distance 31 between the axial bearings 18 and 19 of the drive shaft 12 does not exceed the length 32 of the axial sliding bearing 10 of the spindle 6, see Fig.1. Axial clearance 33 between the end 34 of the support sleeve 27 and the ring-a safety device 28 limits the axial movement of the turbine rotor 2, see Fig.2.

In addition, in Fig.1 shows: 35 - threaded output clutch housing 1; 36 - input the threaded sleeve; 37 - sloping channels into the threaded adapter 21, which define the Central path of the drilling fluid to the adapter is whose environment mud 38 communicates with the turbine stator 5, rotates the turbine rotor 2, a threaded adapter 20, the drive shaft 12 with the master and the slave hinge nodes 16, 17, threaded adapters 20, 21, the spindle 6 and the adapter 11 with a chisel.

When drilling heterogeneous rocks on curved subs 13, 14, and the spindle 6 occurs reactive bending moment due to the cutting force on the bit, and the reaction of the bottom hole. The above-mentioned bending moment and reaction of the bottom hole compensated for by the axial movement of the spindle 6 within the axial gap 33 between the end 34 of the support sleeve 27 and the ring-a safety device 28, the rotation of the master and slave hinge units 16, 17 in the axial spherical slide bearing 18, 19, and the damping force of the axial sliding bearing 10 of the spindle 6. Axial clearance of the turbine rotor 2 relative to the turbine stator 5 exceeds the axial gap 33 between the end 34 of the support sleeve 27 and the ring-a safety device 28, while the blades of the turbine rotor 2 is not touching the blades of the turbine stator 5. When the distance 31 between the axial bearings 18, 19 of the drive shaft 12, not exceeding the length 32 of the axial bearing 10 of the spindle 6, the rotation of the drive shaft 12 decreases netsentinel hinge units 16 and 17 by sliding in the axial bearings 18, 19 relative to the axis of the drill, and also dampens axial movement of the spindle 6 in the axial force bearing slide 10, providing minimizing axial movements of the rotor speed turbodrills when changing the reaction of the bottom hole in the drilling process.

When the bit jamming and cutting spindle 6, the adapter 11 with the chisel held by the force of the half-rings 24, covering the spindle 6 in the annular groove 23, the supporting sleeve 27 in the ring of the safety device 28, which is fixed removable sleeve 29 with elastic sliding bearing 30 inside the spindle 7.

SOURCES of INFORMATION

1. Kalinin, A., and other Drilling inclined and horizontal wells. The Handbook. M.: Nedra. P.44, Fig.2.1.

2. RU, patent 2136834, IPC E 21 In 4/02, 7/08, 24.04.97,

3. RU, patent 2149971, IPC E 21 In 4/02, 7/08, 02.02.99,

Claims

Downhole hydraulic motor, containing a hollow body placed inside the drive rotor and spindle mounted inside the spindle for axial and radial bearings with chisel and coupled to the driving shaft with the rotor, and the motor housing and the spindle are connected by curved threaded subs, and the rotor and the spindle is connected to the drive shaft, provided with the master and the slave churn the spindle with cross-connector between axial and radial support from the side of the bit, the spindle is made with an annular groove in the plane of the transverse connector housing of the spindle, in the groove installed split ring whose diameter exceeds the diameter of the spindle, inside the fixed spindle supporting sleeve and the ring-car safety and radial bearing housing spindle with hand chisels made in the form posted on the removable sleeve and secured inside the spindle elastic sliding bearing, the distance between the axial bearings of the drive shaft does not exceed the length of the axial bearing of the spindle.

 

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