A turbo-type drilling speed-increasing tool with a new type of valve structure driven by a cylindrical cam

A cylindrical cam and turbine type technology, which is applied in drilling equipment, valve operation/release devices, driving devices for drilling in boreholes, etc., can solve unsatisfactory vibration effects, sticking under pressure, and low rock-carrying capacity of drilling fluid and other problems, to achieve the effect of improving drilling efficiency, simple mechanism and small pressure drop
CN112647838BActive Publication Date: 2022-02-01SOUTHWEST PETROLEUM UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SOUTHWEST PETROLEUM UNIV
Publication Date
2022-02-01

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Abstract

The invention relates to a turbine-type drilling speed-increasing tool with a novel valve structure driven by a cylindrical cam. Its structure mainly includes upper joint, fluid inlet cone, spring, new valve, sleeve, cylindrical cam, shell, mandrel, turbine, lower joint; upper joint, shell, and lower joint are connected by threads in turn; fluid inlet cone, new valve The mouth sleeve and the new valve sleeve are connected by threads in turn; a spring is installed between the new valve and the new valve sleeve, and a new valve pressure chamber is formed under the new valve to allow the first-in-time fluid to enter and activate the new valve; the turbine drives the cylinder on the mandrel. The cam rotates to make the sleeve matched with the cylindrical cam move up and down, push the new valve to move up and down, close or open the new valve hole, thereby causing the change of the flow area and forming a periodic pulse oscillation in the drill string; the invention can effectively It solves the problems of underpressure and sticking caused by unconventional wells such as long horizontal, highly inclined and multi-branch horizontal wells due to high drilling friction.
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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...

Claims

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