Skid-mounted well repair operation flushing fluid recycling device and method

Abstract

The invention discloses a skid-mounted well repair operation flushing fluid recycling device and method. The skid-mounted well repair operation flushing fluid recycling device comprises a pretreatment process, a sand removal process, an oil removal process, a sedimentation pond process, a filtering process, a well entering process, a well outlet fluid detecting process and an oil removal exceeding process. The sand removal process is connected with the pretreatment process, the oil removal exceeding process and the sedimentation pond process, the oil removal process is connected with the oil removal exceeding process and the sedimentation pond process, the filtering process is connected with the sedimentation pond process and the well entering process, and the well outlet fluid detecting process is connected to the pretreatment process. According to the skid-mounted well repair operation flushing fluid recycling device and method, on-site treatment of well repair operation flushing fluid can be achieved, on-site cyclic treatment of sandblasting flushing fluid and oil water well flushing fluid are simultaneously achieved, the treated flushing fluid can reach well-entering standard and can directly enter a well, and thus recycling of the flushing fluid is achieved.

Description

technical field [0001] The invention relates to an oil-water well flushing operation device in an oil field, in particular to a skid-mounted well flushing fluid recycling device and method for workover operations. Background technique [0002] During the workover operation of conventional oil and water wells, in order to realize the well flushing of oil and water wells, tankers need to transport a large amount of well flushing fluid back and forth between the well site and the gathering station, which not only delays the operation time, but also causes high transportation costs. The application has also caused a lot of waste of water resources. [0003] In order to realize the on-site recycling of well flushing fluid, different forms of well flushing fluid circulation treatment equipment have been developed. According to the purpose of well washing, the well washing operation is divided into sand washing well washing and water injection well washing. However, the standard o...

AI Technical Summary

Problems solved by technology

The circulating flushing equipment for water injection wells mainly focuses on reducing the impurity and oil content in the well fluid to improve the water quality of the flowback fluid. Due to the influence of its treatment process, it has certain requirements on the water quality of the well fluid, and cannot deal with sand and oil content. Large well fluid can only be used for flushing of water injection wells

Therefore, at present, in order to realize the on-site circulating well washing, it is necessary to equip sand washing and well washing fluid circulation treatment equipment at the same time, and the equipment cost is relatively large.

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