Turbo-type underground hydraulic oscillator

A hydraulic oscillator and turbine-type technology, which is applied in vibration drilling, wellbore/well components, vibration generating devices, etc., can solve problems such as affecting the mechanical drilling speed, increasing frictional resistance, and reducing the efficiency of WOB transmission. To achieve the effect of long service life, small bearing load and reduced friction

Active Publication Date: 2017-05-10
YANGTZE UNIVERSITY
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  • Claims
  • Application Information

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Problems solved by technology

The complex wellbore structure not only puts higher requirements on the drilling technology and methods, but also the large inclination angle significantly i

Method used

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  • Turbo-type underground hydraulic oscillator
  • Turbo-type underground hydraulic oscillator
  • Turbo-type underground hydraulic oscillator

Examples

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[0021] The turbine type downhole hydraulic oscillator includes an upper shell 1, a lower shell 2, an upper joint 3, a lower joint 4, a spline sleeve 5 and an intermediate joint 6. The upper shell 1 and the lower shell 2 are screwed to each other through an intermediate joint 6. The end of the lower shell 2 is threaded with a lower joint 4, and the end of the upper shell 1 is threaded with an upper joint through a spline sleeve 5 3; The threaded connection between the upper housing 1 and the spline sleeve 5.

[0022] A turbine shaft 9 is installed in the lower casing 2 through a turbine shaft end cap 7 and a thrust bearing 8, and a turbine assembly is installed on the turbine shaft 9 through a centralizing bearing A10 and a centralizing bearing B11. The turbine assembly is composed of a turbine stator 12 and a rotor 13 which are sequentially installed on the turbine shaft 9. The centralizing bearing A10 is screwed to the turbine shaft 9 through the turbine shaft end cap 7 and the...

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Abstract

The invention relates to a turbo-type underground hydraulic oscillator, and belongs to the technical field of petroleum underground equipment. The turbo-type underground hydraulic oscillator comprises an upper shell, a lower shell, an upper joint, a lower joint, a spline housing and a middle joint, wherein the upper shell is connected with the lower shell by screw thread by the middle joint, the lower joint is mounted by screw threads at the end of the lower shell, and the upper joint is mounted by screw threads at the end of the upper shell via the spline housing; a turbine shaft is mounted in the lower shell by an end cap of the turbine shaft and a thrust bearing. The hydraulic oscillator is driven by a turbine and does not have transverse oscillation caused by eccentric motion, so that the hydraulic oscillator does not have an effect on signal acquisition work of tools such as an LWD (Logging-While-Drilling) tool, an MWD (Measurement-While-Drilling) tool and the like; through own axial periodic high-frequency creeping, the friction condition between a drilling string and a borehole wall is changed, and the increasing speed of the coefficient of instantaneous sliding friction when a drill bit is elastically fed by the drilling string is lowered, thereby reducing friction resistance and improving mechanical drilling speed.

Description

technical field [0001] The invention relates to a turbine type downhole hydraulic oscillator, which belongs to the technical field of petroleum downhole equipment. Background technique [0002] In recent years, with the deepening of exploration technology in major oilfields, the complexity of oil well body structure has gradually increased, and the number of long horizontal, highly deviated and multi-branch horizontal wells has increased and other issues have put forward new realistic requirements for drilling engineering. The development space and demand of tools such as hydraulic oscillators have been improved. How to increase the length of the horizontal section of the horizontal well and realize rapid drilling has become the focus of relevant research in the petroleum industry. The complex wellbore structure not only puts higher requirements on the drilling technology and methods, but also the large inclination angle significantly increases the frictional resistance bet...

Claims

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Application Information

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IPC IPC(8): E21B28/00E21B7/24
CPCE21B7/24E21B28/00
Inventor 冯进魏俊
Owner YANGTZE UNIVERSITY
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