Rotary self-adaptive impact drilling tool

Abstract

The invention relates to a rotary self-adaptive impact drilling tool, and belongs to the technical field of downhole tools. An upper connector is installed at one end of a sleeve in a threaded mode, a bearing body is installed at the other end of the sleeve in a threaded mode, a center rod is installed in the sleeve through a shaft sleeve, a flow dividing body is installed at the top of the center rod in a threaded mode, the bottom end of the center rod extends to the outer end of the bearing body, and a drill bit is installed at the center rod end extending to the outer end of the bearing body in a threaded mode. When the rotary self-adaptive impact drilling tool works, through the reaction torque effect of the center rod, a spring is compressed to store energy, pressure building is formed by drilling fluid in the upper connector, under the combined effect of the drilling fluid and the spring, the center rod is downwards pushed out in an accelerated mode, impact rock breaking is achieved, the phenomenon that the drilling tool is stuck due to continuous drilling of the drill bit and a hard rock stratum is avoided, the problems that in the prior art, drill jamming is prone to occurring, and the drilling efficiency is low are solved, and the rotary self-adaptive impact drilling tool is particularly suitable for drilling in the stratum with the hard geology.

Description

technical field [0001] The invention relates to a rotatable self-adaptive percussion drilling tool, which belongs to the technical field of downhole tools. Background technique [0002] In recent years, with the development and development of shallow oil and gas resources, deep well drilling technology has become more and more important. Due to the deep buried depth of oil and natural gas in deep wells and complex geology, the existing downhole dynamic drilling tools can no longer meet the needs of deep well drilling. When a hard formation is encountered during drilling, it will generate harmful vibration shocks to the drill bit, and at the same time, it is also prone to sticking, which will damage the drill bit, resulting in problems such as low drilling efficiency, long time-consuming and high drilling costs. Therefore, it is necessary to improve it. Contents of the invention [0003] The object of the present invention is to provide a rotatable self-adaptive percussion...

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Problems solved by technology

[0002] In recent years, with the development and development of shallow oil and gas resources, deep well drilling technology has become more and more important. Due to the deep buried depth of oil and natural gas in deep wells and complex geology, the existing downhole dynamic drilling tools can no longer meet the needs of deep well drilling. When encountering a hard formation during the drilling process, it will generate harmful vibration shocks to the drill bit, and at the same time, it is also prone to drill sticking, which will damage the drill bit, resulting in low drilling efficiency, long time-consuming and high drilling costs.

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