SU530116A1 - Hydraulic motor for downhole drilling mechanisms - Google Patents

Description

one

This invention relates to downhole actuators for downhole drilling mechanisms with high torque.

Reciprocating hydraulic motors for driving submersible pumps, containing working cylinders, are known. However, they are structurally complex.

The closest in technical essence to the present invention is a hydraulic motor containing working cylinders with pistons and rods installed in the housing of a cylinder and two distributors made in the valve bodies with openings and connected to the working cylinders.

Such a device is also difficult to construct, has a large size due to the fact that the channels for supplying the working fluid are located on the periphery of the engine.

The purpose of the invention is to reduce the size and simplify the hydraulic engine.

This is achieved by installing a partition rigidly connected to the rods in the housing of the proposed hydraulic motor, in which an axial channel for supplying the working fluid to the well and channels for supplying fluid to the cavities of the working cylinders is made, the first working cylinder is connected to the second distributor, and the second The working cylinder is connected by another pull to the first distributor, while the first cylinder is connected by means of a nut to the screw of the downhole drilling mechanism.

FIG. 1 shows the proposed idle motor with an attachment unit to the well drilling mechanism, general view (start of the downward stroke); in fig. 2 is a sectional view of a hydraulic motor according to A-A in FIG. one.

Claims (1)

The hydraulic motor includes a housing 1, in which two movable working cylinders 3, 4 with fixed pistons 5, 6 are mounted symmetrically with respect to the partition 2. The partition 2 is rigidly connected to the hollow rods 7, 8 of the pistons 5,6. Coaxially to the working cylinders 3, 4, on the outer diameters of the rods 7, 8 and partitions 2, distributors 9, 10 are installed. These are bushings with openings. Cylinder 3 is connected to distributor 1O by means of t g 11. The rods 11 are rigidly fixed on the distributor 1O, and from the corners of the cylinder 3 have grooves 12 for the pins 13, mounted on the cylinder 3, taking into account the switching of the distributor 10 when the cylinder 3 approaches the extreme position. Cylinder 4 is connected in conjunction with distributor 9 by means of m g 14 in the same way. The cylinders of the cores 3 and 4 are closed by the covers 15 and 16. The rods 7 and 8 have two rows of channels displaced relative to each other for supplying liquid into the cavities of the working cylinders 3 and 4. The distributors 9 and 1 O, which are made in the form of bushings, have holes 17-20 ; openings 17 to 18 serve to communicate cavities B, C, D and D (cavity D in Fig. 1 is conventionally shown) of the working cylinders 3, 4 with a power source (not shown); holes 19, 2O - for discharge of fluid into the atmosphere. The actuator has a water shaft 21. The working process in the hydraulic engine is as follows. The pressurized fluid is continuously supplied through the central axial channel 2 for supplying the working fluid to the well and through openings 17 and 18, distributors 9 and 1 O enter the cavity B of cylinder 3 through channel E in the fixed rod and into cavity B of cylinder 4 through channel Ж the rod 8. In this case, the cylinder 4 is held in the initial position due to the equality of pressure and working areas of the piston 6 and part 23, and the cylinder 3 makes a working stroke downward due to the force created by the working fluid pressure (P 2OOat on the plane AND cover 15 of the cylinder 3. top hat 3, a nut 24 interlocking with a screw 25, for example, a mechanical perforator for cutting the perforations in the casing strings, is rigidly attached.The rotation of the screw 25 is transmitted to the shaft 21 of the executive body of the well drilling mechanism. using two t g 11, moves the distributor 10 of the cylinder 4 to the extreme lower position. The opening 18 of the distributor 10 is aligned with the other channels in the fixed shaft 8, and the working medium enters the cavity G guide cylinder 4. The force created by the Rrab Square S 16 cover 16, moves the cylinder 4 up (with respect to mechanical mechanical speed is idle stroke of cylinder 4, which at the end of its stroke ensures switching the distributor 9 of cylinder 3 to the extreme upper position and thereby washing another cavity D cylinder 3 working pressure). The spent fluid is discharged into the atmosphere from the cavity B of cylinder 4 through channels J of the shaft 8 and holes 20 in the distributor Y. Cylinder 3 moves upwards. At the same time, the fluid from the cavity B of the cylinder 3 through the channels E of the stem 7 and the opening 19 of the distributor 9 is discharged into the atmosphere. At the end of the stroke cylinder 3 using t g 11 switches the valve 10 to its highest position. The holes 18 of the distributor 10 are aligned with the channels W of the rod 8. The fluid enters the cavity B of the cylinder 4, which moves downward. One will displace the fluid from the cavity G of the cylinder 4 through the channel of the rod 8 and the holes 19 of the distributor 1O to the atmosphere. Not income to the lowest position, cylinder 4 using t g 14 switches the valve 9 to the lowest position. The cycle is repeated. Cylinder 3 makes a working stroke down. The fluid flow rate consumed is 2-3 l / s at a pressure of about 200 atm. Claims of the invention A hydraulic motor for borehole drilling mechanisms comprising two working cylinders with pistons and rods installed in a housing and two distributors, made in the form of bushings with holes and associated with working cylinders, and In order to simplify the hydraulic engine, a partition is installed in the housing, rigidly connected to the rods, which has an axial channel for supplying working fluid to the well and channels for supplying fluid to the working cylinder cavities, the first working cylinder is connected oh the second distributor and the second working cylinder connected to the other draft type with a first distributor, wherein the first cylinder is connected via a nut with the screw downhole drilling mechanism. fpu2 1 A-A ff Smb ten f Rig. 2