| 主权项 |
1. An apparatus comprising:
an x-direction support structure extending in the same direction as a line extending between a well center and a V-door on a drilling rig; a y-direction support structure moveable relative to the x-direction support structure, the y-direction support structure extending on a drilling rig in a direction transverse to the line extending between the well center and the V-door on the drilling rig; and a racker device retained by one of the x-direction and the y-direction support structures, the racker device being configured to connect to and carry a tubular stand adapted for well drilling, the racker device being moveable along the y-direction support structure from a position inline with the line extending between the well center and the V-door on the drilling rig to a position offline from the line extending between the well center and the V-door on the drilling rig to provide space for additional drilling equipment along the line extending between the well center and the V-door on the drilling rig, the racker device comprising:
an upper carriage having an upper extending arm configured to selectively connect with a stand of pipe;a lower carriage disposed at a location lower than the upper carriage, the lower carriage having a lower extending arm configured to selectively connect with the tubular stand; anda lift system configured to raise and lower the upper carriage. |
