Operations
Canrig Drilling Technology Ltd. 5-5
Figure 5-3 offers a cross-section of the pipe handler.
Figure 5-3: Pipe Handler Cross-section
When unloading tubulars from pipe tubs or onto the stationary racks with a loader, make sure tubulars are
positioned close to the ramp end of the Catwalk so when the time comes to load them onto the carrier, they
will clear the skate properly. (This typically applies to Range III pipe and casing.)
1. Set the indexing pin in the appropriate stopper hole so the indexer delivers one tubular at a time.
The indexer should catch more than half of the tubular while it rests against the stopper pins.
2. Load the pipe racks with tubulars. The maximum capacity of each pipe rackpipe rack is 20,000 lbs
(9,072 kg). Raise the pipe racks so the tubulars roll up against the pipe stopper pins.
3. Ensure the skate is retracted behind the tubular to be loaded.
4. To prevent tubulars from rolling past the carrier, actuate the opposite-side safety pins.
5. Use the indexer outer raise control to lift one tubular at a time into the carrier. Once the tubular starts
rolling, release the lever to drop the indexer. With practice, it can be anticipated how long to hold the
indexer up to cause the tubular to just roll onto the carrier and drop into the groove.
6. When the tubular is resting in the carrier groove, use the skate to push the tubular as far forward as
possible without hitting the cable protector slots on the ramp. This pushes the weight forward, making
it easier to lift the load.
7. Maximum carrier lift capacity is 10,000 lbs (4,536 kg). Use the Carrier Lift Control lever to raise the
carrier up to the drilling floor. The safety pins raise automatically as the carrier lifts out of the Catwalk.
Caution
NEVER doublestack tubulars on the pipe racks.
Doublestacking prevents loading tubulars into the
carrier using the indexers.
Pipe Rack Arm
20,000 lb (9,072 kg)
Capacity
Safety Pin Indexer
Pipe Rack
Hydraulic Leg
Swing
Wedge
Indexer Kicker
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