SU1234594A1 - Deep-well ejector device - Google Patents

Description

This invention relates to the oil and gas industry.

The purpose of the invention is to enable the extraction of the jet pump from the well while simultaneously aerating the well fluid.

The schematic drawing shows the proposed device.

The downhole ejector device consists of a string of pipes 1 with radial channels 2. Inside the string of pipes 1 is placed a nozzle sleeve 3 with a spring 4 and a packer 5 is placed below the radial flanges 2. The jet pump installed inside the string of pipes 1 includes a housing 6 , a nozzle 7 mounted on a flexible element 8, diff 4) pattern 9 with code 10, a return diffuser 11 with side injection channels 12, communicating output 13 and inlet 14. Case 6, nozzle 7 and diffuser 9 form an injection chamber 15, communicated with the bottom of 16 wells. A column of pipes 1 in the upper part is connected 1 with a pressure line 17, a line 18 and a head 19 with a ruptured diaphragm 20 and a lock 21 for trapping a jet pump.

The force of destruction of the diaphragm 20 is greater than the pressure of the squeezing units. Line 17 is designed to deliver the working agent to squaline, and line 18 is intended to absorb flow from the reservoir. The well fluid exits through line 22 during operation of surface units. The outer diameter of the housing 6 ensures its free passage through the string of pipes 1. The radial channels 2 are provided with an Allen groove 23 for free communication with the outlet 10 of the diffuser 9.

Well ejector device works as follows.

B, the well is lowered into a string of pipe 1 consisting of tubing. At the head of the 19 columns of pipes 1

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diaphragm 20 and lock 21 are installed to trap body 6 after the formation has been called up. Borehole -) 1 vayug and the liquid flow

5 Case 6 is placed on the sleeve-saddle 3. The spring 4 is pressed, the sleeve-saddle 3 is displaced downwards, output 10 of the diffuser 9 is informed with 2 pipe columns with radial channels. The well is packaged and the fluid is circulated in the well. Fluid flow, exit from the nozzle 7.J deforms the flexible element 8 and brings the nozzle 7 closer to the diffuser 9. At this time, the pressure in the injection chamber 14 is transmitted to the reservoir and under the effect of creating a depression between the wellbore and the reservoir. the near-well zone of the reservoir is cleaned of impurities and begins

20 flow from the reservoir to the well. Gradually, the reservoir filter zone is completely cleared of contaminants and the inflow increases. The pressure of the reservoir is transmitted to the inside of the pipe string 1 and at

2, it exceeds the pressure of the ground units, the bottom 20 is destroyed, as in this prem line 18 is open. In this BpeMJ4 the ground units are stopped and the supply line 17 is closed

30 working agent. The influx from the formation into E; the ide or gas condensate increases,. Under the action of the pressure drop in the nozzle 7, the elastic element 8 deform is Ormed and the nozzle 7 approaches the opposite: the diffuser 10. The gas condensate flow, the effluent from the nozzle 7, enters the inverse diffuser 10, creating local shrkulyation around and above the diffuser 10. Well fluid

40 is aerated and the ejection pump rises to the wellhead with simultaneous aeration of the fluid. With sufficient supply 5, the mouth 6 of the housing 6 is planted in the cavity of the switchgear 19 and secured with the lock 21.

45 The well goes into flowing and development mode.

35

m

1S

YU

Editor N.Gorvat

Order 2962/39 Circulation 548 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, Projecto st., 4

Compiled by V. Boryskina

Tehred O. Sopko Proofreader I. Erdein

Claims (1)

A downhole ejector device containing a column of pipes with radial channels, inside of which a spring-loaded sleeve-saddle is placed with the possibility of overlapping the radial channels of the pipe string, a packer located below the radial channels, and a jet pump installed inside the column, including a housing, a nozzle and a diffuser, forming an injection chamber communicating with the annulus after the jet pump is mounted on the sleeve-saddle, characterized in that, in order to enable the extraction of the jet pump from the well with one aeration time wellbore fluid, it is provided with the nozzle set above the inverse diffuser injection with lateral channels communicating its input and output, and a flexible member, £ on which the nozzle is to be alternatively interact with a diffuser and reverse diffuser. > ”1234