Reciprocating impact down hole hammer drilling tool

Abstract

The invention relates to a down hole hammer drilling tool for providing reciprocating impact in drilling engineering. The down hole hammer drilling tool mainly consists of an upper joint, a check valve, a sleeve, a shell, an external small sleeve, a hammer, a hammer sleeve and the like. According to the technical scheme, a drilling rod joint, the upper joint, the shell, a transmission chuck and a drill bit are connected in sequence from the top down; the sleeve is mounted inside the upper joint, the check valve is mounted at the upper part of the sleeve, a beam is mounted in the middle of the sleeve, and the two ends of the beam penetrate through the sleeve and are arranged in the upper joint; uniformly distributed circular holes in the circumferential direction are formed in the middle of the sleeve, and sleeve upper part wall holes are formed in the lower end of the sleeve; the external small sleeve is mounted on the outer side of the sleeve, and external small sleeve wall holes are formed in the external small sleeve; the lower end of the sleeve is connected with the hammer in virtue of threads; the lower end of the hammer and a drill bit upper end bulge inside the hammer sleeve can form sealing; drill bit keys are matched with the transmission chuck, and the outside of transmission chuck is connected with the shell in virtue of threads. The down hole hammer drilling tool is simple in structure, can be used for drilling operation, provides impact energy, increases the drilling efficiency and reduces the drilling cost.

Description

technical field [0001] The invention relates to a down-the-hole hammer drilling tool capable of providing reciprocating impact during drilling, which is suitable for oil and gas drilling engineering and workover services, and can also be used for geological exploration hole drilling engineering. Background technique [0002] Hydraulic down-the-hole hammer (referred to as hydraulic hammer or impactor) drilling is a major reform of the existing rotary drilling, and is a new drilling method after modern diamond drilling. It makes better use of the weakness of hard rocks, which are brittle and have low shear strength and are not resistant to impact force. It is an effective drilling technology to solve the problem of low drilling efficiency and poor drilling quality in hard rock formations and some complex rock formations. [0003] my country is one of the best countries in the world in the research and application of hydraulic hammer technology. The exploration institute is in...

AI Technical Summary

Problems solved by technology

[0022] However, most of the reciprocating impact down-the-hole hammers currently used use spring-driven hammers to impact or reset. In this way, because the springs are prone to failure during frequent expansion and contraction, the tool life is generally not too high; moreover, due to the force on the impact surface It is very large, and the force is frequent, so it is easy to cause failure at the impact surface; and the hammer starts slowly at the beginning of the upward stroke, and it is very time-consuming to frequently impact and reset.

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