RU133562U1 - Borehole installation for simultaneous separate work environment pumping in two layers - Google Patents

Abstract

Downhole installation for simultaneous and separate injection of the working medium into two layers, containing one pipe string, a packer mounted between the upper and lower layers, characterized in that it contains an additional packer mounted above the upper layer, radial holes are made in the pipe below the additional packer - perforation , a throttle is mounted below the perforation, and even lower, in front of the lower packer, is a flow meter.

Description

The utility model relates to oil and gas production in multilayer fields and can be used for simultaneous and separate injection (ORZ) of the working medium (water, emulsion or mixture) into two reservoirs in order to maintain the design reservoir pressure in the fluid withdrawal zone.

There are well-known borehole rigs for workplace ARI in two layers (R. Girfanov. Experience in applying ORZ technology at the North Buzachi field of the Republic of Kazakhstan, Production and Technical Oil and Gas Journal “ENGINEERING PRACTICE” No. 1, 2010 - p. 42; RU 2328590 C1 , published July 10, 2008), consisting of a column of pipes of larger and smaller diameters placed concentrically in one another with one or more packers.

The disadvantage of such installations is the complexity of the design, significant metal consumption and high cost.

Closest to the claimed technical solution is the installation for simultaneous-separate injection of the working medium into two layers in the well, containing one pipe string, a packer mounted between the upper and lower layers, well chambers with removable valves mounted above and below the packer (RU 2253009 C1 , publ. May 27, 2005).

The disadvantage of such installations is the design complexity and time-consuming procedure for changing the flow rate of the working medium pumped into the reservoir by replacing the valves of the borehole chambers.

The task to which the claimed utility model is directed is to simplify the design of the well installation, as well as the procedures for changing the flow rate of the working medium — water, emulsion, or a mixture pumped into formations.

This problem is solved due to the fact that the claimed downhole installation for simultaneous-separate injection of the working medium into two layers contains one pipe string, a packer mounted between the upper and lower layers. In addition, it contains an additional packer mounted above the upper layer, below the additional packer, radial holes are made in the pipe — perforation, a throttle is mounted below the perforation, and a flow meter is even lower in front of the lower packer.

The technical result provided by the given set of features is to simplify the design of the well installation, as well as reducing the time for the procedure for changing the flow rate of the working medium pumped into the reservoirs.

The invention is illustrated by drawings, which depict:

in FIG. 1 is a diagram of a well installation;

in FIG. 2 - remote element "A" (throttle) in figure 1.

The downhole installation includes a pipe 1, upper 2 and lower 3 packers, a flow meter 4, a throttle 5 mounted between the upper layer 6 and the lower layer 7. Between the upper packer 2 and the upper layer 6 there are radial holes 8 (perforation). The packer 2 is installed above the upper layer 6, and the packer 3 is installed between the upper layer 6 and the lower layer 7.

The throttle contains a housing 9, inside of which a saddle 10 is made, mating with the returnable replaceable unit 11 with a passage channel 12, the diameter of which is ⌀d.

The utility model is as follows.

The pump station at the inlet to the well creates the required design pressure depending on the geological and mineralogical characteristics of the reservoirs. The working medium under a certain pressure is supplied through the pipe 1, presses the replaced assembly 11 against the seat 10 of the housing 9 of the throttle 5, is throttled through the passage channel 12 with a diameter ed of the replaced assembly 11, and then is supplied through the flowmeter 4 to the lower layer 7. Excessive fluid through the radial holes 8 enter the annulus limited by the upper 2 and lower 3 packers, and then into the upper layer 6. As the productive characteristics of the layers, measured by wellhead (not shown in Fig.) and deep (item 4) flow meters, change, spine to change the working environment flow into them. This is ensured by adjusting the pressure of the working medium at the inlet of the well and changing the diameter (⌀d) of the passage channel 12 of the replaced unit 11. The replacement of the node 11 is carried out using cable technology.

The proposed downhole installation for simultaneous and separate injection of the working medium into two layers is characterized by simplicity of design, because contains only one pipe string, and the central location of the throttle in the pipe simplifies the procedure for changing the flow rate of the working medium pumped into the reservoirs.

Claims (1)

Downhole installation for simultaneous and separate injection of the working medium into two layers, containing one pipe string, a packer mounted between the upper and lower layers, characterized in that it contains an additional packer mounted above the upper layer, radial holes are made in the pipe below the additional packer - perforation , a throttle is mounted below the perforation, and even lower, in front of the lower packer, is a flow meter.

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