Vibration coupling type drilling tool impactor

Abstract

The invention discloses a vibration coupling type drilling tool impactor. The vibration coupling type drilling tool impactor comprises a shell assembly, a power assembly, a coupling assembly, a pulse generator and a transmission assembly; the power assembly is arranged in the shell assembly; the coupling assembly is rotationally arranged in the shell assembly, the coupling assembly is in driving connection with the power assembly, and an upper channel and a lower channel which do not communicate are sequentially arranged in the coupling assembly from top to bottom in the axial direction; the pulse generator is arranged between the upper channel and the lower channel of the coupling assembly, the circulation sectional area of the pulse generator is periodically changed along with rotation of the coupling assembly, and the upper channel and the lower channel communicate through the pulse generator; and the transmission assembly is in transmission connection with the lower end of the coupling assembly, and the transmission assembly is used for being connected with a drill bit. During working, the power assembly drives the coupling assembly to rotate, so that the size of the circulation sectional area of the pulse generator is periodically changed, hydraulic pulse pressure is formed, the pulse pressure acts on a whole formed by the coupling assembly, the pulse generator and the shell assembly and is finally transmitted to the transmission assembly and the drill bit, and pulse impact of the drill bit on rock is achieved.

Description

technical field [0001] The invention relates to the technical field of drilling equipment, in particular to a vibration-coupled drilling tool impactor. Background technique [0002] With the expansion of exploration and development of oil and gas resources and the arrival of the era of low oil prices, increasing drilling speed has become an urgent need to reduce drilling costs. Usually, stick-slip, vibration bouncing, non-concentric swing, anti-precession rotation and other phenomena existing in the rock breaking process of the drill bit in medium-hard and complex formations are the main factors affecting the cutting efficiency and life of the drill bit. From the current technical understanding and In practice, the most direct and effective way to solve these problems is to keep the drill bit in a stable rock-breaking state, especially for the PDC bit. [0003] In recent years, new tools such as PDC bit torsion impactor, PDC bit torque stabilizer, hydraulic pressurizer, and...

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Problems solved by technology

[0003] In recent years, new tools such as PDC bit torsion impactor, PDC bit torque stabilizer, hydraulic pressurizer, and three-dimensional vibration impactor have appeared. Field use has proved that these tools have specifically solved a certain problem that affects the stability of the drill bit in rock breaking. factors, the ROP and drill bit life have been improved in a certain range and circumstances, but the overall speed-up effect and application range are still limited, and most tools are not suitable for combined use or matching screw drilling tools for compound drilling

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