A coiled tubing hydraulic two-way jar

Abstract

The invention relates to the technical field of oil and gas field coiled tubing working and well repairing, in particular to a coiled tubing hydraulic double-way jar which comprises an upper connector, an upper cylinder sleeve, an O-shaped sealing ring, a sealing ring back ring, a sealing ring, a sand-prevention blocking ring, an impact tube nut, hydraulic oil, an impact tube, an O-shaped sealing ring blocking ring, an upper piston, a middle connector, a lower piston, a sand-prevention blocking ring, a locking nut, a lower cylinder sleeve, a spline lower connector and a spline sleeve. During coiled tubing drilling and grinding, due to various reasons such as complex geologic structures, improper technical measures, mud, tubular columns and well holes, accidents of drilling tool blocking often happen. During drilling tool blocking, upward or downward strong impact force is applied to a blocking point through the jar, so that the blocking point is loosened, and accordingly the purpose of quick unblocking is achieved. The jar can be widely used in well repairing working such as coiled tubing salving, and salving working is reliable and quick.

Description

technical field [0001] The invention relates to the technical field of coiled tubing operation and workover in oil and gas fields, in particular to a coiled tubing hydraulic two-way jar. Background technique [0002] In coiled tubing drilling and grinding operations, due to complex geological structures, improper technical measures, and various reasons such as mud, pipe strings, and boreholes, accidents of drilling tools being stuck (that is, pipe sticking) often occur. Due to the characteristics of the coiled tubing itself and the high tensile strength, it is often impossible to effectively lift out the stuck tubing string. Therefore, when the drilling tool is stuck, the two-way jar can be used to give the stuck point upward or downward with a strong shock force to loosen the stuck point, so as to achieve the purpose of quickly releasing the stuck. The jar can also be widely used in workover operations such as coiled tubing fishing, making the fishing operation more reliab...

AI Technical Summary

Problems solved by technology

my country has introduced jar technology since the 1970s, but compared with drilling technology, there has always been a big gap in technical level, product quality and maintenance services, especially the jars with small specifications and coiled tubing. There has not been a good solution for the large environment of coiled tubing operations, the sealing material of the jar itself, and the influence of machining accuracy.

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