SU1208326A1 - Well jet pump - Google Patents

Description

one

The invention relates to jet technology, mainly to well jet pumps, designed to create a pulsating circulating flow in the well, for example, to release a tool in the well when the latter is stuck.

The purpose of the invention is to increase productivity.

Figure 1 shows the downhole jet pump, a longitudinal section /, in Fig, 2 - section aa in figure 1.

The downhole jet pump contains an active nozzle 1, a mixing chamber 2, a diffuser 3, a nozzle 4 for feeding the passive medium and installed in the nozzle 4 and at the outlet of the diffuser 3, respectively, inlet 5 and outlet b valves. The intake 5 and exhaust b valves are connected to one another by means of the rod 7 and are spring-loaded relative to each other.

When an active medium is supplied, for example: liquid or gas, it has elapsed from the active nozzle 1, post262

goes into the mixing chamber 2 and further into the diffuser 3. At the outlet of the diffuser 3, the flow of the active medium acts on the exhaust valve 6 and causes it to move down and close the inlet valve 5. At the same time, the active medium causes a decrease in pressure at the entrance to the mixing chamber 2 and in the nozzle 4 supply of passive medium. When the pressure drops to the maximum value, the pressure drop across the inlet valve causes it to move upwards and the passive medium enters the mixing chamber 2. As a result, the flow of a mixture of media is formed in the mixing chamber 2, which, acting on the exhaust valve 6, causes, when it moves downwards, the inlet valve 5 closes in the nozzle 4 and supplies a passive medium. The process of opening and closing the intake valve 5 is then repeated, and a pulsating flow of the mixture of active and passive media forms at the inlet and outlet of the jet pump.

FIG. 2

Compiled by S.Kovbasa ..

Editor L.Pchelinska Techred A.Ach Corrector A.Zimokosov

Order 226/46. Circulation 587 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow., N {-35, Raushsk nab., d.4 / 5

Branch PSh1 Patent, Uzhgorod, Proektna St., 4

Claims (1)

A downhole jet pump containing an active nozzle, a mixing chamber, a diffuser, a pipe for supplying a passive medium and inlet and outlet valves respectively installed in the pipe and at the outlet of the diffuser, characterized in that, in order to increase productivity, the inlet and outlet valves are interconnected by rod and spring-loaded relative to each other. I Fie.! 1 1208326