serpentine guide jet

Abstract

The invention discloses a serpentine guide injector, which belongs to the field of workover tools in oil fields. The serpentine guide injector includes: a spray head and at least one movable joint, each movable joint includes a connected first part and a second part, the first part is a ball head, and the upper end of the spray head is provided with a first spherical bowl, the first The first part is rotatably arranged in the first ball bowl, and the second part is connected with the first part of another movable joint or the coiled tubing; the inside of the spray head is provided with a first passage along the vertical direction, and the first passage is connected with the first ball bowl. Connected, the inside of the movable joint is provided with a second channel along the vertical direction, and the second channel communicates with the first channel; there are multiple through holes on the nozzle, each of which communicates with the first channel, and the through holes with the same diameter Symmetrically arranged on the nozzle. The serpentine pilot injector can realize the unblocking of any section in the wellbore or trunk pipeline.

Description

technical field [0001] The invention relates to the field of workover tools in oil fields, in particular to a serpentine guide injector. Background technique [0002] In the process of oilfield production, due to sand plugging during fracturing, poor setting of open-hole packers, sand plugging, and backflow of proppant after fracturing, it is easy to cause blockage in the wellbore; Pipe wall waxing and scaling will appear over time. In order to eliminate the fouling of the pipeline, it is necessary to carry out the descaling operation on the main line pipeline. In order to achieve wellbore plug removal, the coiled tubing jet plug removal process can be used. [0003] In the prior art, when removing the blockage of the wellbore and the main oil pipeline, the coiled tubing is mainly used to connect the joints with through holes, and the joints are transported to the target section by lowering the coiled tubing for hydraulic jet blockage removal. [0004] However, the wellbo...

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Problems solved by technology

[0004] However, the wellbore or trunk pipeline is not completely a vertical section. When the vertical section of the wellbore has a section with a relatively large well deviation or a section with an excessively large wellbore inclination, and the trunk pipeline is a non-straight section, the coiled tubing connection of the prior art has a When the joint of the through hole cannot reach the target section through the above section, the wellbore or trunk pipeline cannot be unplugged, which affects the workover efficiency

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