Composite inserted tooth blade diamond comprehensive drill bit

Abstract

The invention discloses a composite inserted tooth blade diamond comprehensive drill bit. A drill bit matrix (1) consists of a joint (11), a gauge protection surface (12), a blade (13), a waterway (14) and a center water hole (15). A replacement block 16 is reserved in the blade 13. The replacement block 16 is used for carrying out welding-on on a cutting abrasion block 2 and a PDC (Polycrystalline Diamond Compact) 3. According to the invention, the special high-intensity high wear resistance superhard material cutting abrasion block is subjected to welding-on on the blade of the drilling bit matrix and the composite inserted tooth blade diamond comprehensive drill bit is matched with a downhole motor assembly to implement high-efficiency drilling in a stiff-plastic compact mud rock and glutenite interlayer; the composite inserted tooth blade diamond comprehensive drill bit has the characteristics of high efficiency, long service life and low cost; and the difficult problems of short service life and low construction efficiency of a conventional roller bit and a conventional PDC drill bit can be effectively solved.

Description

technical field [0001] The invention belongs to downhole tools in the field of drilling operations in oil and gas fields, and in particular relates to a composite insert blade type diamond full-face drill bit. Background technique [0002] In the field of oil and gas exploration and development, roller cone bits and PDC bits are widely used because of their high efficiency and long life. In deep strata with complex geological structure and conglomerate interlayer, the roller cone bit shows slow drilling speed and short pure drilling time; the PDC bit shows slow or even no footage, and often requires several or even more than ten roller cone bits or The PDC bit can only drill to the target layer, and sometimes it may cause the cone to fall off, all of which have the disadvantages of low efficiency, short life, high cost and low success rate. There is no effective rock breaking tool to increase the ROP in the above-mentioned deep complex formations. , shortening the drilling ...

AI Technical Summary

Problems solved by technology

[0002] In the field of oil and gas exploration and development, roller cone bits and PDC bits are widely used because of their high efficiency and long life. In deep strata with complex geological structure and conglomerate interlayer, the roller cone bit shows slow drilling speed and short pure drilling time; the PDC bit shows slow or even no footage, and often requires several or even more than ten roller cone bits or The PDC bit can only drill to the target layer, and sometimes it may cause the cone to fall off, all of which have the disadvantages of low efficiency, short life, high cost and low success rate. There is no effective rock breaking tool to increase the ROP in the above-mentioned deep complex formations. , shortening the drilling cycle has always been a technical difficulty for drilling workers

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