Invention Grant
US07641004B2 Drill bit 有权
钻头

  • Patent Title: Drill bit
  • Patent Title (中): 钻头
  • Application No.: US11795029
    Application Date: 2006-01-16
  • Publication No.: US07641004B2
    Publication Date: 2010-01-05
  • Inventor: Paul-Philippe Lapointe
  • Applicant: Paul-Philippe Lapointe
  • Applicant Address: CA St. Laurent
  • Assignee: Groupe Fordia Inc.
  • Current Assignee: Groupe Fordia Inc.
  • Current Assignee Address: CA St. Laurent
  • International Application: PCT/CA2006/000053 WO 20060116
  • International Announcement: WO2006/076795 WO 20060727
  • Main IPC: E21B10/48
  • IPC: E21B10/48
Drill bit
Abstract:
A bit for drilling a hole. The bit includes a support member, the support member having a passageway extending substantially longitudinally therethrough; a substantially annular crown defining a crown distal end and a crown proximal end, a radially inwardly located crown inner surface and a radially outwardly located crown outer surface, the crown extending from the support member; a slot extending between the crown inner and outer surfaces from the crown distal end substantially longitudinally towards the crown proximal end, the slot defining a slot first side wall, a substantially circumferentially opposed slot second side wall and a slot proximal wall extending therebetween substantially opposed the crown distal end; and a reinforcing member extending substantially circumferentially across the slot between the slot first and second walls; wherein the slot includes a slot proximal segment extending between the reinforcing member and the slot proximal wall and a slot distal segment extending between the reinforcing member and the crown distal end.
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