Adjustable water nozzle for oilfield water injection and water distributor with same

Abstract

The invention discloses an adjustable water nozzle for oilfield water injection and a water distributor with the same, and belongs to the technical field of oilfield separate zone water injection. The adjustable water nozzle comprises a valve sleeve and a valve core, wherein the valve sleeve has a cavity structure and is provided with a water outlet hole; the valve sleeve is in threaded fit with the valve core; the valve core is in seal fit with the conical surface of the water outlet hole of the valve sleeve; the head of the valve core is provided with a side hole; a cavity is formed betweenthe valve sleeve and the valve core outside the side hole; a water inlet hole is formed in the valve core; and the tail part of the valve core is provided with a claw. The water distributor has a tube-shaped structure; the adjustable water nozzle is vertically arranged on the side of the water distributor and is communicated with the inner wall and the outer side of the water distributor; a bridge channel for water injection is formed in the wall of the water distributor; and a water nozzle adjuster for controlling the adjustable water nozzle is arranged in the water distributor. The adjustable water nozzle and the water distributor can accurately control water injection rate and are suitable to be popularized in the technical field of the oilfield separate zone water injection.

Description

technical field [0001] The invention relates to a layered water injection technology for an oil field, in particular to a fine layered water injection device for an oil field. Background technique [0002] At present, with the shortage of crude oil in the world, people pay more and more attention to how to improve the oil recovery rate of developed oilfields. Oilfield layered water injection is a common method in the process of oilfield exploitation, and it is widely used in the world. [0003] The eccentric layered water distribution method is commonly used in the water injection process of oilfields in my country. First, according to the theoretical water distribution and actual water distribution of each oil layer and the nozzle loss curve, a water nozzle with a fixed size is roughly selected and put into the plug. , put the plug into the designated work cylinder of the eccentric water injection well with a dropper, and then use a flowmeter to test the actual water injecti...

AI Technical Summary

Problems solved by technology

The above-mentioned adjustable water nozzle is based on the improved design of the eccentric water injection plug in the oilfield. The adjustable water nozzle is set on the plug, and the plug is put into the designated working cylinder of the eccentric water injection well with a thrower, because The plug is arranged eccentrically, and the fluid flows from the high-pressure end of the faucet to the low-pressure end. To seal the faucet, the valve core of the faucet must move from the low-pressure end of the faucet to the high-pressure end, which coincides with the decrease of the pressure gradient. The small direction is opposite, and the pressure of the water flow has a negative effect on the sealing of the valve core, which also leads to the poor sealing of the plug-type adjustable faucet, the low pressure resistance, and the large driving torque required for adjusting the drive.

These adjustable water nozzles cannot meet the requirements of oilfield fine water injection in terms of deployment efficiency and water injection accuracy. Of course, the water distributors using these water nozzles cannot meet the requirements of fine water injection technology.

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