An ultra-short two-way fully hydraulic while-drilling jar

Abstract

The invention belongs to the technical field of machinery, in particular to an ultra-short two-way full hydraulic while-drilling jar, comprising a transmission shaft, a first combined sealing ring and a third O-ring, and the right outer end of the transmission shaft is fixedly connected with a flower A key joint, the outside of the right end of the spline joint is fixedly connected with a shock cylinder, the left end of the spline joint is fixedly connected with a transmission shaft joint, the right inner end of the transmission shaft joint is fixedly connected with an anti-fall half ring, and the anti-fall A transmission shaft is fixedly connected to the inner side of the half ring, and a first centralizing copper ring is fixedly connected to the internal side of the transmission shaft joint at the left end of the anti-drop half ring, and a transmission shaft is fixedly connected to the internal side of the first centralizing copper ring. By setting pinholes, high-pressure pistons, spacers, high-pressure cylinders and oil plugs, this hydraulic time-delay mechanism uses the gap between the valve body and the valve core to circulate hydraulic oil, even if the outer surface of the valve body is damaged, it will not affect The circulation of hydraulic oil, simple structure and convenient processing are very suitable for hydraulic jars.

Description

technical field [0001] The invention belongs to the technical field of machinery, in particular to an ultra-short bi-directional full-hydraulic while-drilling jar. Background technique [0002] In drilling operations, pipe sticking accidents often occur due to complex geological structures, improper technical measures, mud, boreholes, pipe strings, etc., which have a great impact on drilling operations. If not handled properly, it will not only consume a long time and lose drilling progress Seriously, the accident will worsen, and even the oil and gas well will be scrapped. The jar is one of the effective tools to relieve the stuck drill accident. When the drilling tool is stuck, it can give the stuck point a strong shock force to loosen the stuck point. To achieve the purpose of quickly unblocking. [0003] The time-delay mechanism of the cone valve is traditionally used in the full-hydraulic while-drilling jars used in today’s society. The valve body is composed of multip...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides an ultra-short two-way full-hydraulic while-drilling jar, equipped with a hydraulic delay mechanism, which uses the gap between the valve body and the valve core to circulate hydraulic oil, even if the outer surface of the valve body is affected The loss will not affect the circulation of hydraulic oil, and the advantages of simple structure and convenient processing solve the delay mechanism of the cone valve. The valve body is composed of multiple parts and has a complex structure. It is easy to wear after the first shock, which will have a great impact on the shock performance

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