Integrated drilling-free ball seat guiding shoe

Abstract

The invention discloses an integrated drilling-free ball seat guiding shoe which comprises a seat sealing ball and a body, wherein a sleeve internal thread is machined at the upper end of the barrel-shaped body; multiple shear pin holes are uniformly formed in a position, close to an end surface, on the lower half part; a ball seat inner core and a guiding shoe guide mechanism are designed into an integrated inner core; the upper half part of the integrated inner core is a ball seat part, and the lower half part of the integrated inner core is a hollow guiding shoe cap part; shear pin slots and sealing slots are respectively formed in the outer side of the ball seat part; the outer side of the ball seat part of the integrated inner core is matched with the inner side surface of the body; the hollow guiding shoe cap part is exposed out of the lower end of the body; the shear pin slots are aligned to the shear pin holes of the body; pressure shear pins are mounted in the shear pin holes and the shear pin slots; sealing assemblies mounted in the sealing slots realize sealing on the inner side surface of the body. According to the integrated drilling-free ball seat guiding shoe, due to the integrated inner core connected to the body in a pressure holding detachable manner, a special procedure of drilling off the inner core through a drill is eliminated, so that the construction risk is lowered, the construction time is shortened, the well building period is shortened, and the single well cost is reduced.

Description

technical field [0001] The invention relates to an oil drilling engineering tool, in particular to an integrated drill-free ball seat guide shoe. Background technique [0002] Ball seat pup joints and guide shoes are tools often used in petroleum engineering well completion operations. Their main functions are to cooperate with the seat sealing ball to bear pressure and guide the pipe string to run smoothly. The general method of using the widely used ball seat nipples and guide shoes is as follows: the guide shoes are installed at the bottom of the pipe strings to provide guidance for the pipe strings to ensure that the pipe strings run smoothly, and the ball seat nipples are connected separately from the guide shoes. Several strings can be connected between them. Its common feature is that the ball seat in the ball seat nipple and the shoe guide cap of the guide shoe are all fixed on the body. After the construction is completed, the drilling tool must be drilled to remov...

AI Technical Summary

Problems solved by technology

Its main disadvantages are: it will cause more follow-up procedures; the construction time will be longer; if the inner diameter of the pipe string is small, it will make it difficult to run the drilling tool; it will increase the construction cost; especially for the use of packers for interlayer isolation. In the completion method of cement slurry cementing, drilling down to remove accessories will destroy the isolation system, resulting in failure of interlayer isolation

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