SU1370323A1 - Multistep gas lift - Google Patents

Abstract

The invention relates to the field of pump construction and reduces the energy costs by increasing the ejection capacity of the gas. The lift tube 1 of the preceding stage is mounted concentrically inside the mixer (C) 3 of the next stage. The end face 4 of the pipe 1 of the preceding stage is located above the level of the gas pipeline 2 of the next stage, which allows the working gas to form at the approach to C 3 into a uniform flow without pulsations and eddies. The interaction in C 3 of the gas-liquid flow from the previous stage and the gas flow of the next stage occurs with minimal energy loss, since the flow rates are close in magnitude and have the same axial direction. Therefore, the transfer of energy from the gas stream of the subsequent stage to the transported liquid of the preceding stage is carried out purposefully, without dissipation. 1 il. , t o (L

Description

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The invention relates to pump construction, in particular, to the construction of a multi-stage gas lift, and can be used in the design of gas lifts, for deep mines. The purpose of the invention is to reduce energy costs by increasing the ejection capacity of gas.

The drawing shows gas lift, general view.

Multistage gas-lift contains steps, each of which is made in the form of a lifting pipe 1, a gas pipeline 2 and a mixer 3 with inlet and outlet ends, with the lifting pipe 1 of the preceding stage installed concentrically inside the mixer 3 of the next stage. The end face 4 of the riser pipe 1 of the preceding stage is located above the level of the gas pipeline 2 at the end of the stage. The output end of the mixer 3 subsequent steps are made open and immersed in the liquid.

Multistage gas lift works as follows.

The gas enters the mixer 3 of the preceding stage (first stage) through the pipeline 2. The gas-liquid mixture formed rises through the riser pipe 1 to the next stage mixer 3 (second stage) where it is picked up by the gas flow coming from the next stage mixer 3.

The gas-liquid flow exiting the riser 1 at end 4 into the mixer 3 of the next stage has kinetic energy, which is used to further flow the stream in the next stage. The gas that worked in the riser pipe 1 of the previous stage is not thrown away. steps as a result

availability of energy reserves and the possibility of further expansion. In the subsequent stage, the working gas enters through the mixer 3 at the level below the end 4 of the riser pipe 1. This allows the gas to form as it approaches the mixer 3 into a uniform flow without pulsations and turbulences.

The interaction in the mixer 3 of the gas-liquid flow coming from the preceding stage and the gas flow of the next stage occurs with minimal energy loss, especially on impact, since the flow rates are close in magnitude and have the same axial pressure. Therefore, the transfer of energy from the gas stream of the subsequent stage to the transported liquid of the preceding stage is carried out purposefully, without dissipation.

In the event of a sudden stop er-. the elevator in the riser pipe of the next 5 steps, solid material falls out. Since the lower part of the mixer of the next stage is open, it is automatically cleaned by discharging solid material.

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Claims (1)

Invention Formula A multi-stage gas lift comprising steps, each of which is designed as a riser pipe, a gas pipeline and a mixer with inlet and outlet ends, characterized in that, in order to reduce energy costs by increasing the ejection capacity of the gas, the riser tube of the preceding step is installed concentrically inside the mixer of the subsequent step the end of the riser pipe of the preceding stage is located above the level of the gas pipeline of the subsequent stage.