Jet-suction through hydraulic down-the-hole hammer

Abstract

The invention discloses an injection type through hydraulic DTH (Down-The-Hole) hammer, which mainly comprises components including a double-passage joint, an upper joint, a piston, a sleeve valve, a case, a punch hammer body, a guide pipe, a hammering block, a lower joint, an ejector, an ejected device, a valve seat, a valve, a plunger piston and the like, wherein the upper part of the double-passage joint is connected with a drill pipe; the lower part of the double-passage joint is connected with the upper joint of the DTH hammer; the other end of the upper joint is connected with the case; the other end of the case is connected with the lower joint to form a whole; the lower part of the piston arranged in the sleeve valve is rigidly connected with the punch hammer body to form a valve hammer assembly; the two ends of the guide pipe are respectively inserted and connected into positioning holes formed in the bottom of the double-passage joint and the top of the hammering block; the ejector is arranged between the lower part of the upper joint and the guide pipe; the ejected device is arranged between the upper part of the piston and the guide pipe; and the valve arranged at the bottom of the sleeve valve and the plunger piston arranged at the top of the punch hammer body form a valve control mechanism capable of being opened and closed. The injection type through hydraulic DTH hammer is suitable for the large-caliber large-displacement high-pump-pressure and high-well-temperature work environment, and can enter the shaft bottom at the depth being thousands of meters to work by being combined with other underground hydraulic motors.

Description

technical field [0001] The invention relates to the field of drilling machinery, in particular to percussion rotary rope core drilling for oil drilling and scientific deep drilling, large-diameter percussion rotary reverse circulation drilling, large-diameter percussion rotary reverse circulation continuous coring drilling and mines and foundations The jet-suction through-type hydraulic down-the-hole hammer used in engineering drilling. Background technique [0002] The jet-suction hydraulic down-the-hole hammer belongs to the existing technology, for example, it is recorded in the instructions of patent numbers: "85101970.6", "ZL201010579649.5" and "CN104481396"; but the existing jet-suction hydraulic down-the-hole hammer is not through of. The through-type pneumatic down-the-hole hammer is already a very mature drilling tool. It has achieved very good results in reverse circulation continuous core drilling and has been adopted by many construction units suitable for this ...

AI Technical Summary

Problems solved by technology

But there are still more drilling projects, because the high-pressure liquid column in the well is not suitable for the work of the pneumatic DTH hammer, and the dust generated by the pneumatic DTH hammer construction seriously pollutes the environment and is prohibited from being used.

In order to overcome the above-mentioned problems, in the early 1990s, some units in our country have developed and achieved good test results of the through-type differential double-acting hydraulic DTH hammer, but so far the through-type hydraulic DTH hammer has not been able to Applied to production

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