RU2416754C1 - Universal valve - Google Patents

Abstract

FIELD: machine building. ^ SUBSTANCE: universal valve consists of spherical shut off element in form of ball (8), of valve seat (5) and spring (10) installed in hollow cylinder case (1). Shut off element in form of ball (8) is installed in valve unit (2). Valve unit (2) is compressed with threaded bushing (3) and slides in a through opening of the threaded bushing and the case along vertical axis. Radial through uniformly arranged orifices are made in case (4) of valve unit (2). In initial position a low end of the threaded bushing is located below orifices with guaranteed overlap. When ball (8) is in uppermost position the said orifices connect a cavity above the valve unit and a cavity below the valve unit. ^ EFFECT: protection of valve from liquid column pressure at operation under working and idle modes; facilitation of periodic flow of special solution in reverse direction under flushing mode. ^ 5 cl, 3 dwg

Description

The invention relates to shut-off and control devices, for example, included in the complex of equipment for oil production, in which the fluid is supplied using a borehole pump through a production pipe of tubing.

In such complexes, the pressure port of the pump is equipped with a check valve, which protects the system from the pressure of the liquid column located in the pipeline route when the pump is restarted after it is stopped. Since the pump is subject to contamination with paraffin and other deposits during operation, the method of periodic washing with special solutions supplied from the surface along the same pipeline route - the tubing production pipe, but in the opposite direction, is used, i.e. top down. Conventional non-return valves do not allow fluid to pass in this direction, and flushing valves do not protect the pump from liquid column pressure during operation in operating and stop modes.

Known valve assembly comprising a valve box with input and output channels, a guide sleeve mounted between the valve seat and the cover, and a ball locking element, additionally containing a load made in the form of a body of revolution, a closed cavity in the form of a body of revolution is made in the ball locking element, the center of which is offset from the center of the ball locking element, and the load is placed with the possibility of movement in the cavity (RF patent 2107859, IPC F16K 15/04, published 03/27/1998).

This solution is quite complicated to implement.

Known check valve, comprising a housing, a saddle, a locking element made in the form of a ball mounted in the limiter with holes for the fluid flow. The limiter is made in the form of a cage, fixed with a retaining ring, with the possibility of increasing the flow area between the locking element and the limiter during axial movement of the locking element. The limiter is made with conical holes and conical bores for the flow of fluid. The angle of the solution of the cone holes and the bore may be in the range of 1-20 degrees. The seat is secured with a nut and sleeve. To protect the thread, the sleeve is equipped with a sealing ring (utility model patent No. 76379, IPC ЕВВ 34/00, published on September 20, 2008).

The disadvantage of this valve is the design complexity due to the presence of a special limiter with tapered holes for the locking element.

Known backwash valve containing a housing with upper and lower connecting threads, an internal cavity overlapped in the upper part by a selective grill, and communicated with the internal cavity side and longitudinal channels, a seat installed in a vertical section of the side channel, and a ball valve located on the seat with the possibility of moving through the internal cavity and placing in the longitudinal channel and vice versa, it is equipped with a saddle under the ball valve mounted in the upper part of the longitudinal channel, lower on top awn baffle concave grating, and a seat formed as tapered sleeves (RF patent №2081997, IPC E 21 B 34/06, published 20.06.1997).

A disadvantage of the known downhole valve is the complexity of its design, insufficient protection of the pump from the pressure of the liquid column during operation in the operating and stop modes.

The proposed device provides protection of the pump from the pressure of the liquid column during operation in the operating and stopping modes, as well as periodic passage of a special solution in the opposite direction in the washing mode. The proposed valve is switched from operating to flushing mode due to the fact that the flushing solution is supplied under a pressure that is guaranteed to exceed the pressure of the liquid column during normal operation of the pump.

The objective of the invention is to increase the efficiency of the pumping unit, to increase the reliability and life of well pumps in wells.

The problem is solved due to the fact that in a universal valve containing a ball locking element located in a hollow cylindrical body in the form of a ball, a valve seat, a spring, a locking element in the form of a ball is located in the valve block, preloaded by a stepped threaded sleeve and having the possibility of sliding in the through the holes of the stepped threaded sleeve along the vertical axis, in the valve block housing made in the form of a stepped sleeve, there are radial through evenly located holes, with that in the rest position the lower end of the threaded sleeve located below the holes overlap with guaranteed, and at the ball's location in the uppermost position, these openings connect the cavity located above the valve block, and a cavity disposed below the valve block.

In addition, a groove is made in the inner through hole of the valve block body for mounting a valve seat having a through hole and secured to the housing with an axle box, and a groove for locating the ball is made above the seat in the inner through hole of the housing.

In addition, radially grooves are made at the end of the axle box for radial fluid passage, while the lower end of the axle box is designed to support the spring.

Additionally, the spring is made, for example, in the form of a packet of Belleville springs.

Additionally, the spring is pre-compressed by the force, which is determined by the working pressure.

The invention is illustrated by drawings.

Figure 1 is a longitudinal section of the valve in stop mode.

Figure 2 is a longitudinal section of the valve in operating mode.

Figure 3 is a longitudinal section of a valve in flushing mode.

The universal valve contains a hollow cylindrical body 1 with upper inner and lower outer connecting threads that serve to integrate the valve into the tubing string. In the housing 1, a valve block 2 is installed, preloaded by a stepped threaded sleeve 3, which can slide in a through stepped hole of a threaded sleeve 3 along a vertical axis, consisting of a housing 4 in the form of a stepped sleeve, in which an through hole is made for installing a valve seat 5, having a through hole and fixed in the housing 4 with the help of the axle box 6, at the end of which are made evenly spaced radial grooves 7 for the passage of the flushing fluid, above the location of the saddle 5 in the inside A through hole of the housing is made a groove for the location of the locking element in the form of a ball 8, restricting its vertical movement. In the housing 4 of the valve block 2 there are made radial through evenly spaced openings 9, while in the initial position the lower end of the threaded sleeve 3 is located below the openings 9 with a guaranteed overlap K, and when the ball 8 is located in the extreme upper position of the openings 9, the cavity A located above valve block 2, and cavity B, located below the valve block.

The lower end of the axle box 6 is designed to support the spring 10, made, for example, in the form of a package of Belleville springs, while the spring is pre-compressed using the pressure sleeve 11 by the force, which is determined by the working pressure, i.e. the pressure of a liquid column in a vertical pipeline.

The valve operates in three operating modes - working, stopping and flushing.

In the operating mode (figure 2), the spring is precompressed by the force, which is determined by the working pressure, i.e. pressure of a liquid column in a vertical pipeline, liquid under operating pressure is supplied from the pump from below to cavity B, passes through the through hole of valve seat 5, ball 8 rises to its highest position, connects cavity A located above valve block 2 and cavity B located below the valve block 2, the fluid passes through the radial through evenly spaced holes 9 further into the pipeline route.

When the pump motor stops (Fig. 1), the ball 8 falls under its own weight, closes the valve seat 5 hole and the valve acts as a non-return valve, protecting the system from the pressure of the liquid column in the pipeline route. The lower end of the threaded sleeve 3 is located below the holes 9 with a guaranteed overlap K.

When flushing mode (figure 3), the flushing fluid will be fed into the cavity And under pressure, guaranteed to exceed the working pressure. In this case, the valve block 2 slides in the through step hole of the threaded sleeve 3 along the vertical axis and moves downward, overcoming the spring force, the radial through evenly spaced holes 9 extend beyond the lower end of the threaded sleeve 3 and the flushing fluid from the cavity A through the through evenly spaced holes 9 enters cavity B and passes through the evenly spaced radial grooves 7 for passage of flushing fluid down towards the pressure port of the pump.

Thanks to the above-described design features of the valve, its reliability and the life of the well pumps, as well as the efficiency of the pumping unit, are increased.

Claims (5)

1. The valve is universal, containing a ball locking element located in a hollow cylindrical body in the form of a ball, a valve seat, a spring, characterized in that the locking element in the form of a ball is located in the valve block, preloaded by a threaded sleeve that can slide in the through hole of the threaded sleeve and the housing along the vertical axis, in the valve block housing are made radial through evenly spaced holes, while in the initial position the lower end of the threaded sleeve is located below the holes with guaranteed overlap, and when the ball is in the highest position, these holes connect the cavity located above the valve block and the cavity located below the valve block. 2. The universal valve according to claim 1, characterized in that the valve block body is made in the form of a stepped sleeve, in the inner through hole of which a groove is made to install a valve seat having a through hole and fixed in the housing with a box, and above the seat an internal through hole of the housing is made a groove for the location of the ball. 3. The universal valve according to claim 1, characterized in that at the end of the axle box made evenly spaced radial grooves, while the bottom end of the axle box is designed to support the spring. 4. The universal valve according to claim 1, characterized in that the spring is made, for example, in the form of a disk cup springs. 5. The universal valve according to claim 4, characterized in that the spring is pre-compressed by the force, which is determined by the working pressure.

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