Core drill bit with extended matrix height

Core drill bit with extended matrix height

  • CN 101,652,532 B
  • Filed: 12/14/2007
  • Issued: 08/07/2013
  • Est. Priority Date: 12/14/2006
  • Status: Active Grant
First Claim
Patent Images

1. ground drill bit comprises:

  • The drilling rod coupling part;

    AndThe cutting tip that comprises base layer, the matrix height of described base layer is greater than 1 inch and to 6 inches, and wherein said cutting tip comprises;

    a plurality of grooves are positioned on the described cutting tip;

    Fluid/chip the groove of sealing;

    Reach fluid/chip otch, have the fluid/chip groove of sealing on a part of groove in wherein said a plurality of grooves, have fluid/chip otch on another part groove in described a plurality of grooves.

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