Rotary Particle Jet String Cutting Tool

Abstract

The invention belongs to the field of petroleum drilling and production, and in particular relates to a cutting tool for a rotating particle jet pipe string, which includes a pressure cap, a support ring, a centralizing blade, a gland, a filter screen, a disc spring, a rotating outer cylinder, a friction disc, a centralizing bearing, a card Rings, thrust bearings, compression springs, central shafts, nozzle bodies, hard alloy nozzles, etc., by adding particles to the pumped working fluid, using the rotating particle jet pipe string cutting tool to achieve filtration of particles and large-diameter particles in the fluid Purify, and straighten the tool through the straightening blade, spray the rotating particle jet downhole, realize the 360° high-efficiency cutting of the downhole pipe string, and not be limited by special conditions such as small pipe diameter and deformed pipe, effectively improve the cutting efficiency of complex downhole pipe strings, reduce job cost.

Description

technical field [0001] The invention relates to a rotary particle jet pipe string cutting tool, which belongs to the field of oil drilling and production. Background technique [0002] At present, most of my country's oil fields have entered the middle and late stages of development, and the incidence of downhole pipe sticking accidents has continued to rise. For some pipe strings that are seriously stuck, traditional operation methods such as lifting and inverting can no longer achieve a good effect of unblocking the pipe string, which requires downhole cutting of the pipe string to take out the pipe string. At present, the main cutting methods are mechanical cutting and explosive cutting. Mechanical cutting is cut by a mechanical tool, and by rotating the pipe string at the wellhead, the torque loss is large and the effect is poor in highly deviated wells, horizontal wells, and deep cutting. At the same time, the blade is easily damaged and the stability is not high. Exp...

AI Technical Summary

Problems solved by technology

Mechanical cutting uses a mechanical tool to cut the pipe string at the wellhead. When cutting in highly inclined wells, horizontal wells, and deep parts, the torque loss is large and the effect is poor. At the same time, the blade is easily damaged and the stability is not high.

Explosive cutting is carried by the cable to the explosive gun, and the cutting is carried out by underground blasting. However, when the cable is conveyed, it is easy to encounter obstacles in the middle, and the parameters such as the required amount of explosives cannot be accurately judged, and it is easy to damage the casing, resulting in complicated accidents.

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