SU968348A1 - Apparatus for starting a well - Google Patents

Description

FIELD OF THE INVENTION The invention relates to the oil and gas industry, namely, devices for inducing inflow from a formation.

A device for well completion is known, which includes a column pipe with valves 1 provided with partitions inside.

A disadvantage of the known device is the inability to treat the formation and cause an influx in a controlled depression.

The closest technical solution to the invention is a well development device, comprising a hollow body connected to a tubing string and a hollow body, in the internal cavity of which a jet pump and a packer 12 are installed.

The disadvantage of this device is the impossibility of treating the reservoir with various chemical agents, called inflow from the reservoir, when using gas as a working agent.

The aim of the invention is to provide the possibility of simultaneous treatment of a well with a gaseous agent without descending-lifting the device to the surface.

The goal is achieved by the fact that the device is equipped with a valve made in the form of a sleeve with a float, the specific volumetric weight of which is less than the specific volumetric weight of the treatment fluid and more working agent, and the holes communicating the cavity of the pump-compressor pipes with the cavity of the core and the jet pump, A sleeve movement limiter is installed in the upper part of the housing.

The drawing shows the proposed device.

15

The device for treatment and development of wells includes a housing 1, a circulation sleeve 2 with radial channels 3-5 and a partition 6, a housing 7 with corresponding canal 8 10 and axial channels 11 and 12, a float 13 with a stop 14, an inkjet apparatus 15 with a nozzle 16 and a mixing camera and a packer 18.

The device works as follows.

25 way.

 The device is mounted on the tubing shoe and lowers into the well. When treating productive formation with fluid

30 chemical float 13, thanks

the ease of weight in the liquid rises up to the limiter 14, lures the sleeve 2 behind it. This is ensured by the fact that the specific gravity of the float material is less than the specific gravity of the liquid, but greater than the specific gravity of the gas. The effect of the flow rate of the pumped agent on the movement of the float 13 is prevented by the limiter 14, Channels 4 and 9 are connected, and direct communication with the formation takes place. After appropriate chemical treatment of the reservoir, go to its development. Press the well into the working agent with gas and pack a pipe string. The float 13 with the circulation sleeve 2 under its own weight of gravity goes down in the medium of gas. In this case, channels 3 and 5 of the circulation plug 1 and 2 communicate with channels 8 and 10 of the casing 7. The partition b separates the formation from the supply line of the working agent, and the jet device 15 begins to operate according to the well-known principle of operation. The working agent, the passage of the nozzle 16 and the mixing chamber 17, creates a pressure drop in the reservoir through the channels 11, 5 and 10, thus achieving the challenge of the flow of oil or gas from the reservoir. If it is necessary to replace the reservoir development mode with a treatment mode, the working agent — gas for liquid — is changed and the indicated cycles are repeated.

The economic efficiency from the implementation of the image of the image is to increase the efficiency of expanding the field of application of the device. For example, if the transition from chemical treatment of a formation to its development by a known device requires the replacement of a jet apparatus, then when using the proposed device, this replacement disappears. This means that all of the work itself, the material costs associated with the tripping, with {the use of the proposed device, j, are reduced depending on the repetition cycle of these operations.

Claims (2)

Invention Formula Well development device, which is connected to the column tubing tubular hollow body with channels, in the inner cavity of which a jet pump and a packer are installed, characterized in that, in order to enable simultaneous treatment of wells with a gaseous agent without descending-lifting the device to the surface, it is equipped with a valve made in the form of a sleeve a float, the specific volumetric weight of which is less than the specific volumetric weight of the treatment fluid and greater than the working agent, and the openings that communicate the pump-to-plenum-compression pipes with the body cavity and jets th pump, and the top portion of the housing sleeve installed movement limiter. Sources of information taken into consideration during the examination 1, USSR Author's Certificate 581247, cl. E 21 V 49/00, 1977. 2. USSR author's certificate number 653386, cl. E 21 V 49/00, 1979 (prototype).