Turbine drilling type multi-branch slim hole well completion tool and operation method

Abstract

The invention discloses a turbine drilling type multi-branch slim hole well completion tool and an operation method. The tool includes an outer sleeve. The lower part of the outer sleeve is connectedto a steering device. The side wall of the steering device is provided with two pipeline outlets. An upper turbine and a lower turbine are arranged in the outer sleeve. The upper turbine and the lowerturbine include turbine stators, turbine supporting seats, turbine rotors and rotating mandrels. The lower ends of the upper turbine and the lower turbine are connected to wires. The lower end of each pipeline is connected to a branch drill bit. The two branch drill bits are arranged in the two pipeline outlets of the steering device. Each pipeline includes an inner flexible shaft and an outer hollow pipeline. The upper ends of the inner flexible shafts are connected to the rotating mandrels, and the lower ends are connected to the branch drill bits. The upper ends of the outer hollow pipelines are connected to the turbine supporting seats, and the lower ends are in contact with the branch drill bits. The turbine drilling type multi-branch slim hole well completion tool can be used in oilfield workover operation and has the advantages of window-opening drilling of the branch drill bits, large treatment radius, controllable depth of a slim hole, simple and reliable construction operation and the like.

Description

technical field [0001] The invention belongs to the technical field of oil field development and production, and more specifically relates to a turbo drilling type multi-branch slim hole completion tool and an operation method. Background technique [0002] Low-efficiency wells and shutdown wells have become the key factors restricting the stable production of oil fields in production oil fields. For low-yield and low-efficiency wells with low liquid production, if the formation liquid supply capacity is poor due to geological reasons, the development plan should increase the oil and gas drainage area. If the oil layer pollution is caused during the development process such as drilling and completion or oil production, the oil and gas drainage channels should be dredged. [0003] In order to increase the oil and gas drainage area, dredge the oil and gas drainage channels, and increase the liquid production of low-yield and low-efficiency wells with low liquid production, ac...

AI Technical Summary

Problems solved by technology

These technologies not only have advantages, but also have obvious disadvantages in some aspects, for example, the treatment radius of acidizing technology is small, the fractures of fracturing technology are uncontrollable, the drilling and completion of complex structure well technology is complicated, the operation time is long, and the operation time of radial drilling technology is long. Long, requires high voltage equipment, etc.

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