Anti-drill-sticking PDC drill bit

Abstract

The invention provides an anti-drill-sticking PDC drill bit, and belongs to a rotary-drilling drill bit structure for petroleum and geology. The anti-drill-sticking PDC drill bit includes a drill bitbody and a joint, wherein the drill bit body includes blades and a gauge, and PDC teeth are brazed to the blades. According to the key technology points, a ridge-shaped slope is arranged on the frontend surface of the gauge, a debris discharging groove is formed in a gauge body, and a small platform is arranged between the debris discharging groove and the ridge-shaped slope. The anti-drill-sticking PDC drill bit has the beneficial effects that the ridge-shaped slope structure on the front end surface of the gauge can push a large amount of falling blocks and rock debris to the two sides of the gauge and discharge the falling blocks and the rock debris to free space between the blades, and the risk of drill sticking is greatly reduced; and the gauge body is provided with the debris discharging groove structure with a one-way outlet, when the falling blocks and the rock debris are stacked and squeezed in the debris discharging groove, the open slope structure enables the falling blocksand the rock debris to be discharged to a deeper opening position along with the slope under the action of squeezing force and enter the free space between the blades of the drill bit, and the drillsticking caused by accumulation of the rock debris and the falling blocks on the surface of the gauge is further avoided.

Description

technical field [0001] The invention belongs to the technical field of drill bit design and manufacture, in particular to the design and manufacturing technology of a rotary drilling bit for petroleum and geology, and in particular to an anti-jamming PDC bit with a special diameter structure. Background technique [0002] At present, rotary drilling bits including PDC teeth as cutting teeth are widely used in fields such as petroleum and geology, and such bits are called PDC bits for short. The PDC bit has the advantages of high ROP and long drilling life. During the drilling process, some formations are unstable, and the well wall is prone to block and fall to the bottom of the well (such as figure 1 shown). In the horizontal section drilling, the mud is not easy to take away the cuttings cut by the PDC bit. The falling blocks and cuttings are easy to accumulate on the inclined surface of the drill bit gauge, and are constantly squeezed into the gap between the drill bit...

AI Technical Summary

Problems solved by technology

Blocks and cuttings are easy to accumulate on the inclined surface of the drill bit diameter, and are continuously squeezed into the gap between the drill bit diameter surface and the well wall, resulting in increased friction between the drill bit and the well wall

Especially in the process of lifting the drill bit, it is very easy to cause the drill bit to be stuck, resulting in drilling sticking accidents

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