Realization method and structure of a rotary valve reversing type hydrodynamic circumferential impactor

Abstract

The invention discloses a rotary valve reversing type liquid power peripheral impacting device realization method and structure. Fluid flows through a rotary blade to drive a blade mandrel and a rotary valve mandrel to rotate relative to a static valve shell of a rotary valve; the rotary valve mandrel and the valve shell of the rotary valve are provided with windows which are communicated in a staggered manner, so that the fluid alternatively enters a working cavity formed by an impacting head and a piston cylinder and pushes the impacting head to do reciprocating motion so as to impact the piston cylinder. A main body structure is composed of an outer cylinder and an impacted drill bit sleeve from left to right; the outer cylinder and the impacted drill bit sleeve transfer torsion by adopting interlocking teeth; a power module and an impacting module are arranged in the outer cylinder from left to right; the power module is provided with the blade mandrel, the rotary blade and an alignment bearing; the impacting module is arranged at the lower end of the power module; the impacting module is provided with the rotary valve mandrel, the valve shell of the rotary valve, the impacting head, a thrust bearing, the piston cylinder and the impacted drill bit sleeve from inside to outside. The rotary valve reversing type liquid power peripheral impacting device realization method and structure have the effect of prolonging the service life of a drill bit.

Description

technical field [0001] The invention relates to the technical field of drilling technology, in particular to a realization method and structure of a rotary valve reversing type hydrodynamic circumferential impactor. Background technique [0002] With the development and deepening of human exploration of the deep layers of the earth, in the process of drilling deep wells and hard formations in many blocks on the earth, problems such as low mechanical penetration rate and short life of drill bits are very prominent. For example, hard formations such as jasperite, quartzite, hornshale and other hard formations or other metamorphic rock bottoms are encountered in the scientific investigation and drilling work. When using PDC bits to drill into the above formations, especially in the process of deep well drilling The slipping effect is very serious. The sticking effect causes the irregular release of torsional elastic energy accumulated in the drill string, making the rock-break...

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Problems solved by technology

[0003] In view of the above problems, the embodiment of the present invention provides a method and structure for implementing a rotary valve reversing type hydrodynamic circumferential impactor, aiming to solve the short service life of the PDC bit caused by the sticking effect in the prior art and the poor drilling efficiency. low technical issues

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