Turbine type drilling speed increasing tool with novel valve structure driven by cylindrical cam

Abstract

The invention relates to a turbine type drilling speed increasing tool with a novel valve structure driven by a cylindrical cam. The turbine type drilling speed increasing tool structurally and mainly comprises an upper joint, a fluid inlet cone, a spring, a novel valve, a sleeve, the cylindrical cam, a shell, a mandrel, a turbine and a lower joint; the upper joint, the shell and the lower joint are sequentially connected through threads; the fluid inlet cone, a novel valve port sleeve and a novel valve sleeve are sequentially connected through threads; the spring is installed between the novel valve and the novel valve sleeve, a novel valve pressure chamber is formed below the novel valve, and a first-in secondary fluid is allowed to enter and activate the novel valve; and the turbine drives the cylindrical cam on the mandrel to rotate, so that the sleeve matched with the cylindrical cam moves up and down, the novel valve is pushed to move up and down, a novel valve hole is closed or opened, the overflowing area is changed, and periodic pulse oscillation is formed in a drill stem. The problems of backing pressure, sticking and the like caused by large drilling friction of existing long-horizontal, high-inclination and multi-branch horizontal wells and other unconventional wells can be effectively solved.

Description

technical field

[0001] The invention relates to a turbine-type drilling speed-increasing tool with a new valve structure driven by a cylindrical cam, belonging to the technical field of drilling tools for oil and natural gas exploitation. Background technique

[0002] Due to the shortage of oil resources and the large demand, the oil extraction technology has also been developed to adapt to the oil wells with complex well structure and the large number of long horizontal, highly deviated and multi-branch horizontal wells. Many new drilling tools have also been developed and used, making complex and unconventional drilling possible. In long horizontal, highly deviated and multi-branch horizontal wells, the wellbore trajectory is complicated, and the friction between the drill string and the well wall is greater than that of conventional vertical wells, resulting in back pressure and pipe sticking, which reduces drilling efficiency and prolongs development. cycle. During the...

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