SU1099056A1 - Method and apparatus for workover of a well - Google Patents

Abstract

1. A method for developing a well, including a pneumatic treatment of the near-filter zone of the formation and the subsequent pumping of fluid by an airlift, characterized in that, in order to increase the effectiveness of the effect on the formation, the pneumatic impulses are created many times with simultaneous operation of the airlift. 2. A well completion device comprising a string of pipes with lateral air inlets, a pneumatic chamber and a gas-lift valve, characterized in that the pneumatic chamber is made in the form of a closed cylinder suspended on an air supply pipe and installed with the possibility of limited axial movement and overlapping lateral openings at the extreme top position of the cylinder, above which an additional valve is installed with, -j opening pressure, lower than the pressure of opening the gas-lift valve. 3. Device POP.1, which is tapering by the fact that the side holes in the air supply pipe are located along a helical line.

Description

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The invention of drilling for drilling wells and can be used in the development, operation and repair of wells mainly in water. The overwhelming majority of water wells are mastered — prepared for operation by an airlift pumping method.

In order to improve the quality of the development of wells, water begins to find the use of pumping in a pulsed mode. The pulses create different ways or periodic alternation of pumping from the annulus, formed by pump-compressor and water-lifting pipes or annulus, formed by columns of lifting and casing 13.

The disadvantages of this method are that it does not create a continuous pumping process, which reduces the mastering effect and the performance of devices operating in a discontinuous mode, is much lower.

The closest in technical essence to the present invention is a method for developing a well, including pneumatic treatment of the infiltration zone of the reservoir and subsequent pumping of fluid by airlift and a device for its implementation, comprising a string of pipes with lateral air supply ports, a pneumatic chamber and a gas-lift valve Gs 2.

A disadvantage of the known device is that in order to transfer to the usual air-lift pumping, the ball of the air supplying tube to the working chamber is blocked off and to create the next cycle of pneumatic impulses, the device must be removed to the surface and prepared for operation.

The purpose of the invention is to increase the effectiveness of the formation.

This goal is achieved by the fact that, according to the method of well development, including pneumatic treatment of the under-filtering zone of the reservoir and subsequent pumping of fluid by an airlift, pneumatic pulses are created many times with simultaneous operation of the airlift.

In the well development device, which contains a string of pipes with side air inlets, a pneumatic chamber and a gas-lift valve, the pneumocamera is made in the form of a closed cylinder suspended on the air supply pipe and installed with the possibility of limited axial movement and blocking the side holes at the extreme upper position of the cylinder In which an additional valve is installed, with the opening pressure, lower than the opening pressure of the gas-lift valve.

In addition, the side holes in the air supply pipe are located along a helical line.

Figures 1 and 2 show the device for implementing the proposed method.

The device contains a compressor unit 1 (FIG.), An air supply pipe 2, a closed cylinder 3, a valve box 4, two check valves 5 and b, the lower part of the air supply pipe 7 with openings

5 8 and nozzle 9.

chamber b is connected to the valve box 4 by means of a movable pipe 2, at the end of which there are discharge openings 8 placed

0 through the helix to ensure the selection of the optimal mode of pneumatic pulses. The check valve 6 on the discharge line is connected to the nozzle 9, which ensures the operation of the airlift.

5 A method for developing a well with respect to the device is performed as follows.

The device is placed in a drilled well, while the pipe 7 is lowered to its lowest position so that the discharge ports 8 are inside the cylinder 3. Compressor installation 1 forces air through the air supply pipes 2 into the valve box 4. At the same time, the valve 5 first opens pressure., than the latch 6. Cylinder 3 is filled.

Subsequently, with increasing pressure, valve 6 opens and air

 from the compressor unit 1 is fed to the nozzle 9, which ensures the operation of the airlift.

To create a pneumatic impulse, the movable pipe 2 is raised (Fig. 2)

5 so that the discharge openings 8 extend from the cylinder 3 over a distance ensuring an optimal effect on the producing formation. The air spent after the pneumatic impulse gives off its kinetic energy and raises fluid from the well, thereby increasing the productivity of the air-lift system. Lowering the movable tube 2 to the bottom position, the cycle is repeated.

The implementation of the proposed method using the device allows you to repeatedly create pulses and

at the same time pumping by airlift, which ensures good development of the well, reduces development time and energy costs for pumping means.

Claims (3)

1. A method of well development, including pneumatic treatment of the prefilter zone of the formation and subsequent pumping of the liquid by an airlift, characterized in that, in order to increase the efficiency of the impact on the formation, the air pulses are created repeatedly with the simultaneous operation of the airlift. 2. A device for well development, containing a pipe string with side openings for air supply, a pneumatic chamber and a gas lift valve, characterized in that the pneumatic chamber is made in the form of a closed cylinder suspended on an air supply pipe and installed with the possibility of limited axial movement and overlapping side holes at the topmost position of the cylinder, above which an additional valve is installed with an opening pressure lower than the opening pressure of the gas lift valve. 3. The device according to claim 1, characterized in that the side openings on the air supply pipe are arranged along a helical line.