A docking and diverting tool for chemical passage outside the downhole tubing

Abstract

The invention discloses a butt jointing and diverting means for a chemical agent channel outside an oil pipe in downhole. A releasing tool is sealed with a first set of sealing modules in a feeding and diverting insert seal; a sealed working barrel is sealed with a second set of sealing modules; the first set of sealing modules is sleeved on an upper sealing cylinder; the upper sealing cylinder is connected with a lower sealing cylinder on which the second set of sealing modules is sleeved; the lower sealing cylinder is connected with a lower sealing joint; a lower connector is arranged at the lower end of a central tube; and the central tube, an upper connector lock nut, the upper sealing cylinder and the lower sealing cylinder form a sandwiched cavity for the chemical agent to pass through. The butt jointing and diverting means forms an independent chemical agent flow channel, and at the same time, the original production and testing channel is remained. The butt jointing and diverting means realizes sealed butt joint in downhole and long-term downhole agent feeding to an oil well which applies Y type production strings, and enables the chemical agent to be fed to the downhole completion strings of the oil well, thereby satisfying the needs of practical application.

Description

technical field [0001] The invention relates to a butt joint and diversion tool for downhole oil pipes, in particular to a butt joint and diversion tool for drug channels outside the downhole oil pipe. Background technique [0002] With the development of offshore oil fields, problems such as wellbore scaling and wax deposition have become increasingly serious, which have affected the normal production of oil wells and subsequent workover operations. In order to solve problems such as scaling and waxing in oil wells, downhole chemical agent injection is often used. [0003] In the process of realizing the present invention, it is found that there are at least the following shortcomings and deficiencies in the prior art: [0004] Although there are various downhole agent injection techniques, none of them can add chemicals downhole to oil wells using Y-shaped production strings for a long time, and can inject agents into the downhole completion pipe string of oil wells. Co...

AI Technical Summary

Problems solved by technology

[0004] Although there are many downhole agent injection techniques, none of them can add chemicals downhole to oil wells that use Y-shaped production strings for a long time, and can inject agents into the downhole completion pipe string of oil wells.

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