RU8046U1 - INSTALLATION FOR WAVE IMPACT ON DEPOSIT - Google Patents

Abstract

1. Installation for wave action on the reservoir, containing a tubing string installed in the well with a cylinder and a hollow plunger installed in the cylinder, connected by a rod string to the rocking machine, characterized in that the lower end of the cylinder is open and the plunger is made with side windows, it is equipped with a pipeline for the removal of gas from the tubing string, and the lower end of the cylinder is open into the cavity of the well. 2. Installation according to claim 1, characterized in that it is equipped with a pipeline for gas extraction from the tubing string. Installation according to claim 1 or 2, characterized in that the axial channel of the plunger is closed by a plug, and the tubing string is provided with side openings with a check valve for transferring fluid from the well cavity to the column cavity.

Description

Installation for wave action

The utility model relates to the field of exploitation of oil fields using wave impulse action on oil-saturated reservoirs.

A well-known installation for pulsed exposure, containing a tubing string installed in the well with an anvil on a shoe, a falling load placed in the string and a mechanism for loading / unloading the load

The disadvantage of the installation is that it needs a special

drive unit. In addition, the falling load does not ensure uniform distribution of I

shock load on the baschmak columns, which can lead to its destruction.

Closest to the claimed installation is a device for wave action on the bottomhole zone of wells by a shock wave, containing a tubing string with a pipe, a plunger with a check valve and a shut-off element with a spring-loaded valve and radial channels 2 located in the tubing string.

The disadvantage of this device is that a significant part of the pulse energy generated in the tubing is extinguished in the shut-off element.

The technical challenge facing the utility model is to reduce energy loss during transmission of pulses from the tubing string into the well and further into the reservoir.

M. KL.6 E2IB 43/25

to the pool

To solve this problem, in a setup for wave action on productive reservoirs of a reservoir containing a tubing string installed in the well with a cylinder and a hollow plunger connected by a rod string with a rocking machine, the lower end of the cylinder is made open into the borehole, and the plunger is made with side windows, while it is connected with a rocking machine so that the side windows exit the cylinder with the upper position of the plunger.

The installation is additionally equipped with a pipeline for the removal of the tubing string.

The plunger can be muffled, and the column nlsosiocompressor pipes equipped with side openings with a check valve for bypass fluid from the well cavity into the cavity of the column.

In the drawings, an installation diagram is given for wave action on productive formations, where: in FIG. 1 installation plunger is made with a valve; in FIG. 2nd stub.

The installation comprises a tubing string 2 installed in the well 1 with a cylinder 3 and a plunger 4. The plunger is placed in the cylinder cavity, equipped with a check valve 5 and side windows 6, made below the valve 5, and connected by a string of rods 7 with a rocking machine 8 mounted on surface.

When moving upward, the plunger 4 compresses the liquid and the pressure in the cavity of the column of tubing 2 increases significantly.

The working stroke of the rocking machine 8 is designed so that when the plunger exits to the upper point of its window 6, exit cylinder 3 and open the entrance to it for

compressed fluid. A sharp pressure discharge occurs, generating wave pulses in the well cavity that are transmitted to the reservoir and cause elastic vibrations in it, affecting stagnant and low-permeability zones and contributing to their more intensive involvement in the development.

For the periodic removal of gas, which inevitably accumulates in the upper part of the tubing string, the installation is equipped with a pipeline 9. It is possible to add liquid to the well through the same pipeline.

The plunger can be made with a plug 10 installed instead of a non-return valve, that is, higher than the windows 6, and the column 2 is provided with side openings with non-return valves 11. In this case, when the plunger 4 moves down, the cavity of the tubing string 2 is fed through these valves .

When performing a cylinder or ram with a shank (not shown in the drawings), the power of the pulse coming to the bottom of the well and transmitted to the formation can be increased.

Sources of information:

1. RF patent on application No. 95114981/03, MKI Е21В 43/25, 1995;

2. USSR author's certificate No. 1719623, MKI E21B 43/25, 1989.

CEO

OJSC NK Priobye fc / V l /) V.Yu.

Claims (3)

1. Installation for wave action on the reservoir, containing a tubing string installed in the well with a cylinder and a hollow plunger installed in the cylinder, connected by a rod string to the rocking machine, characterized in that the lower end of the cylinder is open and the plunger is made with side windows, it is equipped with a pipeline for the removal of gas from the tubing string, and the lower end of the cylinder is open into the cavity of the well.  2. Installation according to claim 1, characterized in that it is equipped with a gas extraction pipe from the tubing string. 3. Installation according to claim 1 or 2, characterized in that the axial channel of the plunger is closed by a plug, and the tubing string is provided with side openings with a check valve for transferring fluid from the well cavity to the column cavity.