Multi-directional coupling impulse oscillation type PDC (polycrystalline diamond compact) drill bit

Abstract

The invention discloses a multi-directional coupling impulse oscillation type PDC (polycrystalline diamond compact) drill bit. The multi-directional coupling impulse oscillation type PDC (polycrystalline diamond compact) drill bit is composed of a drill bit joint, a coupling impulse pup joint, a drill bit body, a fluid entrance port, a right feedback flow channel, a right jet flow channel, a rightsplitter plate, a right fluid outlet, pins, a left feedback flow channel, a left jet flow channel, a left splitter plate and a left fluid outlet. According to the multi-directional coupling impulse oscillation type PDC (polycrystalline diamond compact) drill bit, in the working process, drilling fluid flows inside from the drill bit joint, then passes through the coupling impulse pup joint and flows out from a bit port, when the drilling fluid flows through the coupling impulse pup joint, the coupling impulse pup joint can generate axial impulse pressure fluctuation to form axial vibration, four groups of flow channels are uniformly distributed on the circumference of the coupling impulse pup joint, and axial vibration generated by one single group of flow channels can be coupled togetherthrough the superposition principle and acts on the drill bit so as to help the drill bit in rock breaking. The multi-directional coupling impulse oscillation type PDC (polycrystalline diamond compact) drill bit has the advantages that axial impulse vibration is formed through the action of the drilling fluid, so that the rock breaking efficiency of the drill bit can be improved, and the well drilling cost is lowered.

Description

technical field [0001] The invention relates to a multi-directional coupling pulse oscillation PDC drill bit for oil and gas exploration and development, and is especially suitable for wells with complex working conditions such as deep wells and ultra-deep wells. Background technique [0002] With the continuous exploitation of oil and natural gas resources, more and more problems are faced in the drilling process. During the drilling process, the formation hardness and drilling difficulty increase exponentially with the increase of well depth. Improving the penetration rate of hard formations is One of the problems recognized by the world. In the process of deep well drilling, due to the gradual increase of the well depth, when the drill bit breaks the rock at the bottom of the well, the cuttings produced cannot be removed in time, which reduces the drilling efficiency, and even occurs such phenomena as bit balling and burning, which bring disadvantages to the drilling proj...

AI Technical Summary

Problems solved by technology

In the process of deep well drilling, due to the gradual increase of the well depth, when the drill bit breaks the rock at the bottom of the well, the cuttings produced cannot be removed in time, which reduces the drilling efficiency, and even occurs such phenomena as bit balling and burning, which bring disadvantages to the drilling project. influences

And with the increase of well depth, the underlying environment is more complex, and the working conditions of the drill bit are harsh, resulting in a slow increase in drilling footage

As a result, when the drill bit is drilling in deep well formations, there are generally problems of slow mechanical drilling speed and high drilling cost, and the key technical means to increase the drilling speed is how to improve the rock breaking efficiency of the drill bit

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