General Information
Canrig Drilling Technology Ltd. 3-5
Indexers
There are three indexers (Figure 3-4) on both the Drillers Side (DS) and the Off-Drillers Side (ODS) of the
Catwalk (Figure 3-1, page 3-1). Each indexer has two hydraulic cylinders. Operating the outer cylinder lifts
the outer end of the indexer to roll tubulars in towards the carrier. Operating the inner cylinder lifts the inner
end of the indexer to roll tubulars out of the carrier toward the pipe racks.
The outer or inner indexer cylinders on one side of the Catwalk operate simultaneously by the use of one
lever.
The indexers may be operated in either direction (inner raise or outer raise) by pushing the appropriate
lever in the desired direction on either the control console or the wireless terminal.
Figure 3-4: Indexer, Indexing Pin, and Hydraulic Cylinder
NOTE
Indexers DO NOT function when the carrier
is elevated or while the skate is in operation.
Hydraulic Cylinder
Indexer
Indexing Pin
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