Flow motivating type infinite loop well flushing tool

Abstract

The invention discloses a flow motivating type infinite loop well flushing tool. The flow motivating type infinite loop well flushing tool comprises a main barrel, an upper connector, a lower connector, an upper core shaft, a lower core shaft, a piston, a transposition spring, a transposition member and a limiting member. A through hole and an upper core shaft by-pass through hole are formed in the upper core shaft, a blind hole and a lower core shaft by-pass through hole are formed in the lower core shaft, a transposition groove and a piston by-pass through hole are formed in the piston, anda water hole is formed in the main barrel. The piston can realize circumferential switching of the piston through the cooperation of the transposition groove and the transposition member, the piston can realize the axial switching of the piston through the cooperation of the piston and the limiting member, so that the infinite loop switching of a flow channel is realized, the reaction speed is high and the influence of an inclined angle is small, and the problems that starting times of an existing circulating valve is limited and a reset valve is required repeated drilling down are solved; thestructure is compact, the mounting position is flexible, and a plurality of inclination metering modes can be adopted; and the well drilling efficiency is improved, and the well drilling time is shortened.

Description

technical field [0001] The invention belongs to the technical field of downhole tools for oil and natural gas drilling engineering, and in particular relates to an infinite circulation well cleaning tool which can be controlled by fluid pressure during drilling, completion and well repairing and cleaning operations. Background technique [0002] Lost circulation and overflow are common complex situations in wells during drilling. During conventional plugging and well killing operations, large-particle plugging materials are likely to cause damage to downhole instruments. It is necessary to quickly establish bypass circulation to prevent complex accidents; during the drilling of extended-reach deep wells and ultra-deep wells, a large number of cuttings beds are often deposited in the stabilizing section and horizontal section, and it is difficult to clean them in time by conventional small-size drilling tool circulation methods. It may jam the drilling tool or affect the comp...

AI Technical Summary

Problems solved by technology

The fluid-activated circulation switch valve has a fast response speed and is less affected by the inclination angle of the well. By adjusting the displacement, the transposition piston produces different axial displacements under the action of the displacement, which solves the limitation of the opening times of the existing circulation valve and the need to repeat The problem of tripping and resetting the valve; the structure is compact, the installation position is flexible, and a variety of inclinometer methods can be used

Images