Impeller type multi-pulse water power oscillator

Abstract

The invention discloses a water power oscillator. The water power oscillator is used in the fields of petroleum drilling and the like and has the function of chip removal promotion. According to the technical scheme, an upper joint, an upper shell body, a lower shell body and a lower joint are sequentially connected through threads; an impeller is matched with an impeller shaft through flat keys,thus circumferential positioning of the impeller is achieved, axial positioning of the impeller is achieved through stairs and a locknut, and the stairs and the locknut are arranged on the impeller shaft; an impeller spindle, a transmission short section and a valve core are sequentially connected through threads; four through-holes are formed in the transmission short section in the radial direction, the four through-holes are spaced with each other at 90 degrees, and the lower end of the transmission short section is connected with a moving valve plate through threads; two radial through-holes are formed in the upper end of the valve core and are spaced with each other at 180 degrees; two through-holes are formed in the middle part of the upper joint and are spaced with each other at 180degrees, and after parts are assembled, the through-holes of the upper joint and the through-holes of the valve core are located at the same plane in the radial direction. According to the impeller type multi-pulse water power oscillator, axial vibration can be generated, frictional resistance between lower drilling tools of a horizontal well and a large-displacement well and the wall of the wells is effectively decreased, rock-carrying capacity of a drilling fluid can be improved, the drilling efficiency is improved, and meanwhile, downhole accidents such as sticking and clamping can be avoided.

Description

technical field [0001] The invention belongs to a novel downhole tool in the field of petroleum and natural gas drilling engineering, in particular to a novel hydraulic oscillator with the function of promoting debris removal. Background technique [0002] In recent years, with the continuous development of my country's industry, the demand and exploitation of oil and natural gas are also increasing. However, in order to alleviate the shortage of oil resources in our country, people began to exploit oil in areas with severe environmental conditions such as deep wells and ultra-deep wells. The exploitation of new oil and gas wells makes drilling engineering more complex. In order to meet the needs of new drilling conditions or new oil and gas resources (such as coalbed methane, shale gas, offshore oil and gas, etc.), corresponding new drilling methods and tools are also constantly being developed. In horizontal wells and extended-reach wells, with the increase of well penetr...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the problems of large drilling friction in existing horizontal wells and extended-reach wells, the inability of the drilling pressure at the wellhead to be effectively transmitted to the drill bit, the low rock-carrying capacity of the drilling fluid and the use effect of the existing axial vibration tools Unsatisfactory problem, design a new impeller type multi-pulse hydraulic oscillator

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