Patents Assigned to AJ Lucas Coal Technologies Pty Limited
  • Coiled tubing drilling system
    Patent number: 7753141
    Abstract: A drilling rig for drilling an underground borehole (5) into a seam (4) uses coiled metal tubing (8) fed by a tractor unit (11) from a drum (7) to provide a thrust force to a drilling head. The drilling head has a bent-sub assembly giving an angle of deviation which is controlled by rotating the coiled metal tubing in the borehole by way of rotation of the drum (7) in the frame (12) about the axis of the tube in the borehole (5).
    Type: Grant
    Filed: July 20, 2006
    Date of Patent: July 13, 2010
    Assignees: CMTE Development Limited, AJ Lucas Coal Technologies Pty Limited
    Inventors: Timothy Gregory Hamilton Meyer, Duncan MacDonald