Operations
Canrig Drilling Technology Ltd. 5-7
Lower Tubulars from Drilling Floor
1. Set up the pipe racks so the tubulars will roll down the racks onto the stationary racks. Remove the
indexing pins. If desired, remove the pipe rack outboard pins.
2. Lift the carrier up to the rig floor and extend it as far over the floor as required. For faster tripping with
light pipe, position the carrier closer to the edge of the rig floor. Usually, a thread protector is spun on
prior to setting the tubular onto the carrier groove.
3. Make sure the skate is positioned back just behind where you anticipate releasing the tubular from the
elevators.
4. Push the tubular out and set it on the carrier groove. Slowly start lowering the blocks. The bottom end
of the tubular should slide down the groove as the blocks are lowered. If the tubular sticks, slowly back
the carrier up to increase the angle of the carrier until the tubular begins to slide.
5. Prior to releasing the tubular from the elevators, bring the skate forward to support the tubular so it
does not slide back uncontrolled and impacts (collides with) the skate. This could easily damage the
skate or skate winch, and will seriously reduce the life of the skate cable.
NOTE
Indexers, kickers, and pipe racks do not operate
when the carrier is lifted out of the Catwalk, or while
the skate is in operation.
Caution
NEVER leave tubulars on the Catwalk when
the carrier is in operation. All tubulars must be
on pipe racks during carrier operation. Tubulars
could roll under the carrier or lift arm, causing
extensive damage to the equipment.
Caution
When tripping out, ensure the skate supports
the tubular before releasing the tubular
from the elevators.
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