Patents Assigned to Hard Rock Drilling & Fabrication, L.L.C.
  • Steerable horizontal subterranean drill bit having an offset drilling fluid seal
    Patent number: 6827159
    Abstract: Various steerable horizontal subterranean drill bit apparatuses, which may have a drill bit, a housing and a one-bolt attachment system, or other features.
    Type: Grant
    Filed: July 31, 2002
    Date of Patent: December 7, 2004
    Assignee: Hard Rock Drilling & Fabrication, L.L.C.
    Inventor: John B. Sved
  • Steerable horizontal subterranean drill bit having elevated wear protector receptacles
    Patent number: 6814168
    Abstract: A steerable horizontal subterranean drill bit apparatus is disclosed. The apparatus may include a drill bit and a housing. The drill bit may include elevated wear protector receptacles in particular locations and configurations.
    Type: Grant
    Filed: July 31, 2002
    Date of Patent: November 9, 2004
    Assignee: Hard Rock Drilling & Fabrication, L.L.C.
    Inventor: John B. Sved
  • Steerable horizontal subterranean drill bit
    Patent number: 6810971
    Abstract: Various steerable horizontal subterranean drill bit apparatuses, which may have a drill bit, a housing and a one-bolt attachment system, or other features.
    Type: Grant
    Filed: July 30, 2002
    Date of Patent: November 2, 2004
    Assignee: Hard Rock Drilling & Fabrication, L.L.C.
    Inventor: John B. Sved
  • Steerable horizontal subterranean drill bit having a one bolt attachment system
    Patent number: 6810972
    Abstract: Various steerable horizontal subterranean drill bit apparatuses, which may have a drill bit, a housing and a one-bolt attachment system, or other features.
    Type: Grant
    Filed: July 31, 2002
    Date of Patent: November 2, 2004
    Assignee: Hard Rock Drilling & Fabrication, L.L.C.
    Inventor: John B. Sved
  • Steerable horizontal subterranean drill bit having offset cutting tooth paths
    Patent number: 6810973
    Abstract: Various steerable horizontal subterranean drill bit apparatuses, which may have a drill bit, a housing and a one-bolt attachment system, or other features.
    Type: Grant
    Filed: July 31, 2002
    Date of Patent: November 2, 2004
    Assignee: Hard Rock Drilling & Fabrication, L.L.C.
    Inventor: John B. Sved