Three-dimensional waterpower vibrator for petroleum drilling

Abstract

The invention relates to a three-dimensional waterpower vibrator for petroleum drilling, and belongs to the technical field of design of petroleum drilling tools. The three-dimensional waterpower vibrator is composed of a flow control valve, an axial vibrator, a filtering connector, a screw motor power connector and a hydraulic impulse generator. The three-dimensional waterpower vibrator is characterized in that the flow control valve is used for adjusting flow and speed of slurry flowing into the vibrator, the axial vibrator is used for generating displacement upwards along the axial direction, the filtering connector is used for filtering thick slurry components, certain differential pressure is formed in the screw motor power connector by the slurry entering the vibrator to push a rotor structure in a screw motor to rotate and eccentrically vibrate, and the hydraulic impulse generator generates vibration in the circumferential direction through changes of open area circulation between a stationary ring and a moving ring of a PDC thrust bearing. Through three-dimensional vibration simultaneously generated in the axial direction and in the circumferential direction, large well displacement and frictional resistance between a drill column and a well wall of a horizontal well can be effectively overcome, torque between the drill column and the well wall is reduced, jamming of a drilling tool is avoided, and the three-dimensional waterpower vibrator has the advantages that drilling efficiency is remarkably improved and drilling cost is reduced.

Description

Technical field: [0001] The invention relates to a three-dimensional hydraulic vibrator for oil drilling, which belongs to the technical field of oil drilling tool design. Background technique: [0002] In the process of petroleum drilling, especially in the drilling process of extended-reach wells and horizontal wells, the frictional resistance of the pipe string is the core problem to be solved, which directly determines and affects the maximum extension of extended-reach wells and horizontal wells. [0003] Usually, the ratio of displacement to vertical depth of extended-reach wells and horizontal wells is greater than or equal to 2, the lower limit of the inclination angle must exceed 63°, and since generally extended-reach wells have a vertical section, the maximum The well inclination angle is generally above 70°; the inclination depth of extended-reach wells is up to several thousand meters. For horizontal wells, the wellbore trajectory is approximately horizontal, an...

AI Technical Summary

Problems solved by technology

Under such circumstances, most of the self-weight of the extended-reach well and horizontal well drill string will be pressed against the well wall, and a large friction force will be generated between the drill string and the well wall, which will make it difficult to slide the drill string and make the drill string bear Larger torque makes the drilling speed slow and may cause stuck pipe accidents

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