Using method of coiled tubing incision restoration and repair device

Abstract

The invention relates to a using method of a coiled tubing incision restoration and repair device. According to the technical scheme, the using method comprises the steps that upper pressing caps areconnected with the upper parts of transitional connecting sleeves through connecting bolts, key sleeves are arranged below the upper pressing caps, the key sleeves are provided with inner key grooves,the key sleeves are matched with outer keys of repair port outer sleeves through the inner key grooves, and T-shaped grooves are formed in the lower parts of the repair port outer sleeves; and the bottoms of inner molds of repair ports are of a cone structure, a plurality of injection holes are formed in the bottoms of the inner molds of the repair ports, and the bottoms of the inner molds of therepair ports are in communication with one-way valves in inner cavities of the inner molds of the repair ports through the injection holes. The using method of the coiled tubing incision restorationand repair device has the beneficial effects that through the cooperation of a fully sealed wedge disc, the transitional connecting sleeves, the key sleeves, the repair port outer sleeves, the inner molds of the repair ports and the upper pressing caps, toxic gas is effectively controlled, a large amount of leakage is avoided, self-spraying or overflowing is further avoided, reaming repair of a linear shaped incision is realized, the liquid output or gas output is greatly improved, the problems in the current use of coiled tubing is solved, and the application of the coiled tubing is further promoted.

Description

technical field [0001] The invention relates to a wellhead repairing device in the petroleum industry, in particular to a method for using the coiled tubing cut restoration and repairing device. Background technique [0002] With the continuous development of coiled tubing technology, the development and application of coiled tubing oil recovery or coalbed methane technology has been promoted. The existing coiled tubing has good flexibility. A roll of coiled tubing is several kilometers long and can replace conventional tubing for many operations. , The coiled tubing operation equipment has the characteristics of pressure operation, continuous lifting, small equipment size, fast operation cycle and low cost, and is especially suitable for the exploitation of self-flowing wells. Among them, the coiled tubing four-ram blowout preventer plays a pivotal role in coiled tubing operations and belongs to a special wellhead blowout preventer. The existing coiled tubing four-ram blowo...

AI Technical Summary

Problems solved by technology

Although the above-mentioned invention improves the cutting tool, it still does not completely solve the problem of the incision, and still affects the fluid output of the coiled tubing, partially offsetting the advantages of large and stable fluid output of the coiled tubing

[0004] Therefore, for the four-ram blowout preventer with inline cuts that have been widely used in the oil field, this inline cut has seriously affected the liquid output or gas output of coiled tubing. There are some toxic gases in the pipeline, such as hydrogen sulfide, carbon monoxide, etc., and the energy of the formation is uncertain. Some oil and gas wells have high formation energy. Simply opening the four-ram blowout preventer to repair the cut may cause poisoning that is easy to operate However, it is easy to cause safety accidents such as blowout and overflow of high-pressure wells. Therefore, there is no special repair tool that can complete the repair work of the above-mentioned tubing cuts. Therefore, it is necessary to design a special repair device for straight cuts. Make a safe fix

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