RU62971U1 - HYDRODYNAMIC IMPLOSION PRESSURE GENERATOR OF REUSABLE ACTION - Google Patents

Abstract

The invention relates to the oil industry and can be used to increase oil recovery of producing wells with multiple hydroimpulse effects on the reservoir. The objective of the invention is to increase the reliability of a hydrodynamic implosion generator of reusable action.

This technical result is achieved in that the device of a reusable hydrodynamic implosion pressure generator comprises a housing, an implosion chamber, a plunger, an expanded nozzle with windows, pressure concentrators and a spring-loaded valve, and the valve spring is installed in the lower part of the housing on a special rack, which allows significant degree to reduce its length and reduce the possibility of its destruction due to the high compression rate during valve stroke.

Description

The invention relates to the oil industry and can be used to increase oil recovery in producing wells with multiple hydro-pulse stimulation.

A device is known that provides multiple hydroimpulse effects on the bottomhole formation zone [Popov A.A. "Implasia in oil production processes." M .: Subsoil. 1996 p. 115-11 b].

Closest to the proposed hydrodynamic implosion generator is a device for multiple implosion [Popov A.A. "Impacts on the bottomhole zone of a well. M .: Nedra, 1990, pp. 106-109, where an implosion generator of reusable action is considered].

The device consists of an implosion chamber, a plunger, a valve with a spring, a housing with windows for fluid outlet, pressure concentrators and an expanded part with windows for fluid inlet.

The principle of operation of the device is that when the plunger is raised to the expanded part into the chamber in which the vacuum is created, the liquid column collapses, creating a pressure impulse in the area of the case windows and a depression impulse in the expanded part with windows for liquid inlet.

The plunger is lifted using standard mechanisms (A-50M, LT-11 KM, A-50 U lifting unit or similar). The plunger is attached to the winch either through a column of rods Ф 16 mm, or in a combined way - at the bottom of the rod column,

providing the plunger’s reverse stroke weight, which is attached to the 16 mm Ф cable, while the load on the rods or the cable due to pressure on the plunger (under the plunger is a vacuum state) is ~ 3 · 10 ⁴ N (3 tf) at the well depth 2.5 km.

However, the described implosion devices of repeated exposure to the reservoir have the following disadvantages, these are:

- low reliability of the valve assembly due to the destruction of the return spring caused by the high compression speed during the valve stroke, equal to the length of the windows for the liquid to exit the device body;

- the possibility of contamination of the spring cavity by particles of the borehole fluid and, as a consequence, jamming of the valve.

The objective of the invention is to increase the reliability of a hydrodynamic implosion generator of reusable action.

This technical result is achieved in that the device of a reusable hydrodynamic implosion pressure generator comprises a housing, an implosion chamber, a plunger, an expanded nozzle with windows, pressure concentrators and a spring-loaded valve, and the valve spring is installed in the lower part of the housing on a special rack, which allows significant degree to reduce its length and reduce the possibility of its destruction due to the high compression rate during valve stroke.

The drawing schematically shows a hydrodynamic implosion pressure generator of reusable action, in the cylinder of the implosion chamber 1 of which, on the rod 2, a plunger 3 is fixed. Using a coupling 4 to the cylinder of the implosion chamber 1, the housing of the pressure generator 5 is fixed with windows for the exit of fluid 6, inside which is installed valve 7 with a valve guide 8, which is pressed against the seat 9 by a return spring 10, this

the spring with its lower end rests on a guide rack 11 having openings 12 for the removal of contaminants.

The reusable hydrodynamic implosion generator operates as follows: when the plunger 3 moves upward, under the action of the rods 2, after it enters the extended pipe with windows (not shown in the drawing), a column of liquid from tubing and tubing passing through the windows of the extended pipe, with a speed of 100 ÷ 120 m / s rushes into the implosion chamber 1, passes through and, overcoming the force of the return spring 10, presses the valve 7 until the guide 8 fits onto the guide rack 11, wash it and through ok at 6 goes into the annulus, creating a pressure impulse. The stroke of the valve 7 is 45 mm, and the spring 10 is made in such a way that with such a movement of the valve 7 the closing of its turns is excluded, causing the destruction of the latter.

Thus, the use of the invention will improve reliability and expand the functionality of a hydrodynamic implosion generator of reusable action.

Claims (1)

A reusable hydrodynamic implosion pressure generator comprising a housing, an implosion chamber, a plunger, an expanded nozzle with windows, pressure concentrators and a spring-loaded valve, characterized in that the valve spring is installed in the lower part of the housing on a special rack.