Jarring device for oil drilling

Abstract

The invention provides a jar for oil drilling. The jar for oil drilling comprises an upper connector, the lower end of the upper connector is sequentially connected with a mounting pipe, an impact pipe and a lower connector, an impact rod is inserted into the mounting pipe, an impact head is fixedly mounted at the upper end of the impact rod, a sliding ring and a first fixing ring are vertically mounted in the mounting pipe, and the impact rod is sleeved with the sliding ring and the first fixing ring; the impact rod is fixedly sleeved with the sliding ring, and the impact rod is slidably sleeved with the first fixing ring which is fixedly connected with the inner wall of the mounting pipe. The vibration head is continuously impacted through the impact rod, the vibration rod and the impact pipe are vibrated, when the vibration rod moves up and down, the radial impact block is extruded to slide in the strip-shaped through groove, radial vibration of the radial impact block is formed, and the radial impact block changes rigid impact force applied to the impact pipe by the vibration rod into elastic impact force; and meanwhile, radial vibration of the radial impact blocks can improve the jarring effect of the jar.

Description

technical field [0001] The invention relates to the field of oil drilling, in particular to a jar for oil drilling. Background technique [0002] Oil extraction refers to the act of digging and extracting oil in places where oil is stored. In the process of oil extraction, oil and gas flow from the reservoir to the bottom of the well, and then rise from the bottom of the well to the wellhead. Before mining oil, it is necessary to drill the surface through equipment to find the exact location of the oil to facilitate subsequent extraction. In drilling operations, due to the complex geological structure and improper technical measures, drilling tools often get stuck when they are blocked. The jar is one of the effective tools to relieve the stuck accident. [0003] When the jar needs to be hammered up, apply sufficient pre-tension force on the ground, the locking mechanism in the tool will be unlocked, and the energy stored in the drill string will be released. The hammer of...

AI Technical Summary

Problems solved by technology

[0004] Most jars use up and down jarring to release the jam, but during the actual operation of the jar, the internal jar parts will cause an axial impact on the shell of the jar, which are generally rigid Impact force, long-term axial shock will cause the internal parts and shell of the jar to wear quickly, affecting its service life

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