Active anti-sticking PDC drill bit with rotary rock breaking device

Abstract

The invention relates to the technical field of rock drilling PDC drill bits, in particular to an active anti-sticking PDC drill bit with a rotary rock breaking device. The active anti-sticking PDC drill bit comprises a drill bit body with a cutter head, wherein a plurality of drill bit blades are arranged on the cutter head; an outer flowing channel on the side edge of the cutter head is formed among the drill bit blades; a communicating inner flowing channel for fluid to pass through is arranged in the cutter head and the drill bit body; the fluid flows into the inner flowing channel from the tail end of the drill bit body, passes through the drill bit body and the cutter head, and then flows out from an outlet at the front end of the cutter head; the rotary rock breaking device is arranged in the outer flowing channel of the cutter head; the rotary rock breaking device comprises an impeller and a rotating part; the impeller is arranged in the inner flowing channel of the cutter head; the rotating part penetrates through the side edge of the cutter head; the tail of the rotating part is inserted into the impeller; the head of the rotating part is exposed out of the outer flowingchannel; and the rotating part is driven to rotate by the impeller when the fluid flows through the inner flowing channel of the cutter head.

Description

technical field [0001] The invention relates to the technical field of drilling PDC bits, in particular to an active anti-jamming PDC bit with a rotary rock breaking device. Background technique [0002] The drill bit is the main tool for breaking rock during the drilling process, and the wellbore is formed by breaking the rock with the drill bit. Whether a wellbore is formed well or not, the length of time it takes is not only related to the characteristics of the drilled formation rock and the performance of the drill bit itself, but also related to the degree of matching between the drill bit and the formation. It plays an important role in improving the drilling speed and reducing the comprehensive cost of drilling. [0003] The drill bit is one of the important tools for oil drilling. Whether the drill bit adapts to the rock properties and its quality plays a very important role in the selection of drilling technology, especially in terms of drilling quality, drilling ...

AI Technical Summary

Problems solved by technology

During the horizontal drilling process of the drill bit, there are often rocks falling from the well wall and the well collapse, causing the drill bit to be tightly stuck, and the falling rocks will reduce the ability of the drilling fluid to transport cuttings, making the drill bit Increased friction with the well wall

Complicated operations are required to remove the stuck drill bit from the well. In extreme cases, it is even impossible to remove the drill bit and the rotary steering device connected to the drill bit. The stuck drill bit will reduce the drilling efficiency and increase the drilling cost.

However, the drop of the well wall and the collapse of the well are unavoidable under the existing technical conditions, and the existing PDC bit is not enough to deal with the situation of stuck pipe

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