Drill for cutting-grinding wing type oil and gas drilling

• Main Authors: PANG FENG, VICTOR FEDOROVICH CHIKHOTKIN, TANG FENGLIN, DUAN LONGCHEN
• Format: Patent
• Language: Chinese; English
• Published: 23.10.2013
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The invention provides a drill for cutting-grinding wing type oil and gas drilling. The drill at least comprises a drill steel body and a wing fixed on the drill steel body, wherein the upper part of the wing is provided with a PDC (Polycrystalline Diamond Composite) cutting tool, and the lower part of the wing is provided with a die breaking type cutting tool, wherein the PDC cutting tool is linearly distributed on the drill steel body in a logarithmic spiral shape, and the PDC cutting tool is covered more than twice in any circular ring of a working lip face of the drill steel body; and the die breaking type cutting tool is distributed on the drill steel body in a quadratic curve shape. The PDC cutting tool is combined with other cutting tools, so that each wing has cutting and grinding functions at the same time; when a hard rock is drilled or a stratum layer with soft and hard layers is drilled, the service life of the drill is prolonged, the mechanical drilling speed of the drill is increased, and the ap