RU2287665C1 - Vibrator - Google Patents

Abstract

FIELD: well equipment, namely, vibrators, creating pulsation of liquid in tubing strings for cleaning away paraffin during extraction of oil using fountain method or electric centrifugal pump plants.

SUBSTANCE: vibrator includes body with bushing mounted inside, piston and valve. In accordance to invention, vibrator contains upper and lower subs, wall and spring-loaded sliding block with crank, connected to valve. Piston is made spring-loaded, two-stepped and with tail piece. In the bushing, which is quiescently mounted inside the body, a valve is mounted on the axis. Body is made with aperture for connecting behind-pipe space to closed space, formed by wall and spring-loaded two-stepped piston. Tail piece of the latter can hold the crank in neutral position during decrease of pressure over two-stepped piston. Valve is made concave in working part.

EFFECT: provided excitation of liquid oscillations for cleaning away paraffin on internal surface of tubing strings.

3 dwg

Description

The invention relates to downhole equipment, and in particular to vibrators that create a pulsation of the liquid in the tubing for cleaning paraffin during oil production by a fountain method or ESP units.

Known vibrator [1], the disadvantage of this device is the lack of inclusion of the device in operation when the paraffin is deposited in the inner surface of the tubing and off after cleaning the tubing.

Also known vibrator [2]. This device also cannot be used for cleaning tubing paraffin.

The purpose of the invention is the creation of a vibrator that excites fluid oscillations during deposition of paraffin in the inner surface of the tubing.

This goal is achieved by the fact that it contains an upper and lower sub, a baffle and a spring-loaded slider with a crank connected to the valve, the piston is made spring-loaded two-stage and with a shank, while in the sleeve, which is fixedly installed inside the body, the valve is mounted on the axis, and the body made with a hole for communicating the annulus with a closed space formed by a baffle and a spring-loaded two-stage piston, the shank of which has the ability to fix the crank in it tral position when the pressure above the two-stage piston, the valve in the working section is concave.

A significant difference of the claimed invention is that the operation of the valve connected by a crank occurs depending on the deposition of paraffin in the inner surface of the tubing. With increasing pressure, the two-stage piston is wrung out, while the vibrator starts to work due to the release of the crank, when the pressure decreases after cleaning the paraffin, the piston returns to its original position, that is, the crank is fixed, the vibrator stops.

In figure 1. The structural diagram of the vibrator is shown.

The vibrator consists of a housing 1, sub 2 and 3. A sleeve 4 is fixedly installed inside the housing, in which a valve 5 is installed using the axis 6, a crank 7 connected to the valve 5 with a finger 8, a slider 10 with a crank 7 is connected by a pin 9. Slider 10 spring-loaded with a spring 11. The sleeve 4 at the lower end has an opening 12 and a window 13 through which the shanks 14 of the two-stage piston 15 are passed, forming a closed space with the partition 16. The two-stage piston 15 is spring-loaded with a spring 19, has a stop 17, seals 20 and 21. The hole 22 is used to connect the annular space with a closed space formed by a baffle 16 and a two-stage piston 15.

The device is installed in the tubing string at the start of paraffin deposition. In the absence of paraffin in the tubing at the established operating mode, the two-stage piston 15 is at the lower position due to the selected spring stiffness, the shank 14 fixes the crank 7 in the neutral position (Fig. 3). In this case, the vibrator does not create a pulsation of the liquid. When paraffin is deposited above the vibrator, the fluid pressure rises, while the two-stage piston 15 occupies the upper position, the shank 14 releases the crank 7. The valve 5 and the associated crank 7 and the slider 10 begin to oscillate due to hydraulic forces, opening and closing of the passage channel of the sleeve 4 by valve 5, due to this a pulsation of the liquid is created, which leads to the destruction and removal of paraffin from the inner surface of the tubing above the vibrator. After cleaning the tubing, the pressure decreases over the two-stage piston, the liner occupies the position shown in figure 3.

Information sources

1. Copyright certificate No. 1837653. Device for influencing the bottomhole zone of the well. Authors: Gabdrahimov M.S., Gabdrahimov N.M.

2. Copyright certificate No. 1503384. Downhole vibrator. Authors: Sultanov B.Z., Khabibulin M.Ya., Badretdinov Z.Kh., Gabdrakhimov M.S.

Claims (1)

A vibrator comprising a housing with a sleeve installed inside it, a piston and a valve, characterized in that it contains an upper and lower sub, a baffle and a spring-loaded slider with a crank connected to the valve, the piston is made spring-loaded two-stage and with a shank, while in the sleeve, which fixedly installed inside the housing, a valve is installed on the axis, and the housing is made with an opening for communicating the annulus with a closed space formed by a partition and a spring-loaded two-stage piston the shaft, the shank of which has the ability to fix the crank in the neutral position with a decrease in pressure over the two-stage piston, while the valve in the working part is made concave.

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