Jet stream type impactor for oil gas well drilling

Abstract

The invention relates to an oil-gas well drilling tool, in particular to an efflux hammer used for oil-gas well drilling. An efflux element is provided with a double-sided large-area emptying channel; a stroke regulating lever and a piston rod are integrated; a disc spring support is a fixing support for a disc spring and the press cover of the efflux element. The drilling tool improves the axial position forms of all the parts in the outer cylinder of the prior efflux hammers and overcomes the problem that the sealing between the main parts of the efflux hammer is easy to lose effect; an anti-useless strike mechanism more effectively realizes an anti-useless strike function; further improvement of the efflux element greatly prolongs the service life of the hammer.

Description

Technical field: [0001] The invention relates to an oil and gas drilling tool, in particular to a jet type hydraulic impactor for oil and gas drilling percussion drilling. Background technique [0002] Existing oil and natural gas drilling mainly adopts ordinary rotary drilling technology, combined with roller cone bit, PDC bit, diamond bit and jet drilling technology. When drilling into hard rock formations, the drilling efficiency is very low and the service life of the bit is short. The construction period is longer and the cost is higher. The hydraulic jet type percussion rotary drilling tool disclosed in CN2040529 adapts to water and low-solid phase mud as the flushing fluid. Once the solid content in the flushing fluid is high, the jet element wears seriously, which greatly reduces the service life of the jet element and seriously affects Stability and reliability of drilling work. [0003] The existing hydraulic jet impactor generally consists of a jet element, a cy...

AI Technical Summary

Problems solved by technology

However, in the process of oil and natural gas drilling, as the drilling depth increases, the temperature in the hole continues to rise, and the rubber sealing ring that is in direct contact with the inner wall of the outer cylinder is prone to aging under high temperature conditions, resulting in seal failure

Once the sealing condition of the high-pressure fluid entering the channel of the lower chamber is broken, it will affect the normal operation of the jet element, and if the high-pressure jet cannot be switched normally, it may also cause damage to the jet element due to continuous erosion on one side

Due to the defects of the jet element and the cylinder head, the work of the impactor at the bottom of the hole is very unstable, and the service life is also seriously affected

The sealing between the main parts of a jet impactor disclosed in CN2550477Y has been improved, and the closed channel formed by sealing with rubber sealing ring is changed to an integrated channel, and there are welding parts in the use of this sealing method Potential risk of seal failure due to cracking

[0004] In addition, the internal structure of the existing hydraulic jet impactor has certain defects. For example, if the parts in the outer cylinder are too tight, the impactor will not work normally or even the hammer will not move. On the contrary, if the parts are too tight, If the leakage between the jet element and the top surface of the cylinder causes erosion, the working time of the impactor will also be shortened; the existing jet impactor can realize anti-runaway, the principle is that the axial displacement of the anvil is controlled by the square sleeve, and the piston The self-weight of the rod and hammer makes it slide down automatically, and drives the piston down to close the lower cavity and the liquid flow in and out channels to realize anti-slip, but the anti-snap effect is not ideal

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