Torsion impactor for well drilling and method

Abstract

The invention relates to a torsion impactor for well drilling and a method. According to the technical scheme, the torsion impactor for well drilling is characterized in that a filter screen is arranged on the lower portion of the inner side of an upper connector; an upper disc piece is arranged in the connection position of the upper connector and an outer cylinder; two valve holes A are formed in the upper disc piece; a central hole is formed in the inner side of the outer cylinder; an impact block is arranged on the outer side of the central hole; an impact block bottom bearing piece is arranged at the bottom of the impact block; a fixing valve block is arranged on the outer side of the impact block; a lower disc piece is arranged on the lower portion of the impact block bottom bearingpiece; an inlet disc piece is arranged on the upper portion of the fixing valve block; the two sides of the inlet disc piece are arranged symmetrically; two liquid guiding holes, namely the first liquid guiding hole B and the second liquid guiding hole C, are formed in the two sides of the inlet disc piece correspondingly; and four elliptical pressure relief holes are formed in the lower disc piece. The torsion impactor has the beneficial effects that high-frequency torsion impact of a drill bit is achieved through a mode of impacting a tool body directly; and an impact hammer directly acts onthe drilling tool body, so that the structure is simpler, using is more reliable, and the life is prolonged greatly.

Description

technical field [0001] The invention relates to a drilling tool, in particular to a torsion impactor and method for drilling. Background technique [0002] Drilling deep wells in hard formations, superhard formations and highly abrasive formations is still a worldwide and universal problem until now. Drilling in this kind of formation requires slow ROP, serious jumping drills, difficulties in deflection prevention and correction in vertical wells, frequent drill tool accidents, severe wear of drill bits and centralizers, and problems with borehole diameters, etc. The formation is hard, highly abrasive, with large lithology changes and poor drillability. Sometimes only 1-2 meters are drilled a day, and the drilling efficiency is very low. Inhomogeneous formations, many interlayers, interlaced soft and hard layers, severe drill jumping, and frequent drill tool accidents lead to poor drilling effects and short service life of many types of drill bits. The teeth of the toothed...

AI Technical Summary

Problems solved by technology

This phenomenon is that the formation cannot be effectively cut, and the second is that drill string undercut accidents are prone to occur.

At present, the torsional impact tools developed to solve the above problems have different methods of realizing torsional impact. From the perspective of driving methods, they can be divided into indirect drilling fluid drive type and drilling fluid direct drive type. The current products, there are There are many problems, the drilling efficiency of deep wells and hard formations is low, and the service life is short

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