Drill bit with axial impact function using worm gear and gear

Abstract

The invention relates to a drill bit which utilizes a worm gear and a gear to realize the axial impact function, including an upper joint, a worm gear assembly, a gear reducer, an impact assembly, and an impact-resistant drill bit assembly. The front end of the impact assembly is connected to the anti-impact drill assembly, and the rear end is connected to a gear reducer, and the reducer is driven by the turbine assembly. When the high-pressure drilling fluid enters the inner channel of the upper joint, the drilling fluid drives the turbine to rotate at a high speed. After passing through the gear reducer, it decelerates to a frequency suitable for the vibration and impact of the impact cylinder. The pin cooperates with the slideway of the impact cylinder to lift the impact cylinder and compress it. Spring, when the pin moves to the upper limit position of the impact cylinder slideway, the pin slides to the bottom of the impact cylinder, the spring releases the pressure, and the impact cylinder hits the impact joint to realize the axial impact function of the drill bit. The invention can realize the periodic axial impact of the drill bit, and the blade of the drill bit is inlaid with a conical composite sheet, which can reduce the damage to the drill bit caused by the impact, prolong the service life of the drill bit and improve the rock-breaking efficiency.

Description

technical field [0001] The invention relates to a drill bit used in the fields of petroleum drilling, mining, geological drilling, etc., which uses a turbine and a gear to realize the axial impact function. Background technique [0002] With the gradual depletion of oil resources in shallow layers on land, drilling projects are gradually developing into deep wells, ultra-deep wells and other fields with severe and complex environmental conditions, and the increase in well depth will also lead to a corresponding increase in the difficulty of rock fragmentation. As a result, the rock-breaking efficiency of the drill bit becomes low, and the drilling speed also decreases. Increasing the rotating speed in hard formations is one of the world-recognized problems. In the traditional rotary drilling method, when drilling into hard formations, the drilling speed will decrease, the drilling efficiency will decrease, the drilling cycle will be longer, and the cost will be higher. The k...

AI Technical Summary

Problems solved by technology

[0002] With the gradual depletion of oil resources in shallow layers on land, drilling projects are gradually developing into deep wells, ultra-deep wells and other fields with severe and complex environmental conditions, and the increase in well depth will also lead to a corresponding increase in the difficulty of rock fragmentation. As a result, the rock-breaking efficiency of the drill bit becomes lower, and the drilling speed will also decrease. Increasing the rotation speed in hard formations is one of the world-recognized problems

In the traditional rotary drilling method, when drilling into hard formations, the drilling speed will drop, the drilling efficiency will decrease, the drilling cycle will be longer, and the cost will be higher. The key to improving the drilling speed is how to improve the rock breaking efficiency of the drill bit.

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