A water injection automatic filter backwashing device

Abstract

The utility model relates to a water injection automatic filter backwashing device. Involved in the field of oil recovery technology. One side of the housing is connected to the outlet pipe through a clamp, the inner end of the housing is sealed and connected to the filter cartridge, and the other side of the filter cartridge is sealed and connected to the clamp; The wash piston is connected with clearance, the upper part of the backwash piston is provided with a spring, the bypass pipe at the lower part is connected with the filter piston with clearance, and the lower part of the filter piston is provided with a spring. The invention has the following beneficial effects: by setting the backwash piston and the filter piston, the purpose of automatic backwash is achieved by using the pressure difference change inside and outside the filter cylinder, and it has the characteristics of ensuring the water quality index of the injected liquid, requiring no manual operation, and the injection process is uninterrupted , by setting the grid gasket to filter the liquid flowing into the connecting pipe, preventing debris from entering the piston chamber and causing the piston to move stuck, by setting the adjusting screw, adjusting the pre-tightening degree of the spring, changing the pressure difference value between the upper and lower pistons, and adapting to different water injection pressure requirements.

Description

Technical field: [0001] The invention relates to the technical field of oil recovery, in particular to a water injection automatic filtering and backwashing device. Background technique: [0002] Oil field water injection wells are equipped with a wellhead filter at the wellhead. As the last water quality assurance measure before injection, the wellhead filter needs to be opened and cleaned after a period of filtration to prevent the filter cartridge from clogging and to ensure the water quality of the injected water. Manual inspection is required. Monitoring the pressure change of the wellhead filter, there are human factors that lead to problems such as unguaranteed injection water quality, heavy cleaning labor, and intermittent water injection. Invention content: [0003] In order to solve the above problems, the present invention provides a water injection automatic filter backwashing device. [0004] The technical solution of the present invention is: a water injecti...

AI Technical Summary

Problems solved by technology

[0002] Oilfield water injection wells are equipped with a wellhead filter at the wellhead. As the last water quality assurance measure before injection, the wellhead filter needs to be opened and cleaned after a period of filtration to prevent the filter cartridge from clogging and to ensure the water quality of the injected water. Manual inspection is required. Monitor the pressure change of the wellhead filter, there are human factors that lead to problems such as unguaranteed injection water quality, heavy cleaning labor, and intermittent water injection

Images