SU1604443A1 - Ejector aerator - Google Patents

Abstract

The invention relates to mixing devices for aerating cement slurries and allows for simplified design and maintenance. An ejector aerator includes a housing with an inlet and outlet for cement slurry and an inlet for air. The housing contains a swivel head, the receiving chamber of which is made through and in cross section geometrically equal to the inlet and outlet for the cement slurry. Nozzles and mixing chambers coaxial with them are located in the swivel head. The position of the swivel head is determined by the mode of operation of the aerator. 3 il.

Description

I The invention relates to mixing devices and is intended for dap aeration cementing solutions for cementing gas and oil wells.

The aim of the invention is to simplify the design and maintenance of

Figo depicts an ejector jet aerator in the mode of injection of a buffer fluid or cement slurry, a longitudinal section in Figo2 is the same; in the pumping mode of the squeeze fluid I at fkgoZ, the device is made with several nozzles coaxially mixed with NSW mixing chambers;

The case of the first ejector aerator (figo) has an inlet 2 for cement slurry, an inlet of 3 dp of air and an outlet 4 for an aerated cement grout.

The aerator solution is equipped with a nozzle 5, connected with a ffloy chamber 6 with a mixing chamber 7. Nozzles, the receiving chamber and the mixing chamber are made in the swivel head 8

The ejector aerator operates in the following way.

When pumping a buffer fluid or cement slurry (figo), the flow through the inlet 2 in the housing 1 moves to the nozzles 5, in the swivel head 8 from the nozzle the flow moves at high speed through the receiving chamber 6, where the air from the inlet 3 is entrained the flow into the mixing chamber 7 "The mixture of liquid and air from the chamber 7 is mixed 1 and enters outlet 4, where the kinetic energy of the flow is converted into potential energy,

About 4

4 4

WITH

required to overcome the back pressure in the injection line

When pumping a squeezing fluid (FIG. 2), the swivel head 8 is turned in housing 1 to align the receiving chamber b with inlet 2 and outlet 4c. Selling liquid moves through inlet 2, receiving chamber 6 and outlet 4 without additional hydraulic resistances, and the movement of the fluid the air line is prevented by a check valve (not shown) about

In order to increase the jet surface and greater zhection efficiency in the swivel head, it is possible to arrange several, for example, four (figs), nozzles and coaxially with them, mixing chambers or perform nozzles and a mixing chamber with slit-like sections.

The location of the nozzle, the receiving chamber p of the mixing chamber - in the rotary head of the housing will allow

to increase the design of the aerator, to exclude the switching of shut-off valves of the bypass line or block of manedov when switching to another mode of operation and to ensure the continuity of the cementing process

Claims (1)

Invention Formula An ejector aerator comprising a housing with an inlet for cement slurry, an inlet for air and an outlet for an aerated solution, nozzles, a receiving chamber and a mixing chamber, characterized in that, in order to simplify the design and maintenance, it is equipped with a rotatable head housed inside the housing, and the nozzles, the receiving chamber and the mixing chamber are made in the swivel head, with the 3rd receiving chamber being made through and in cross section geometrically equal to the inlet for cement slurry and the outlet Fy FIG .. 7 5 Fig.Z -