STANDARD HANDBOOK OF PETROLEUM & NATURAL GAS ...

Air and Gas Drilling 851
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Rotating
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PIPE RAMS
I
Figure 4-189. BOP stack arrangement for low cellar rig.
2. Close the blind rams, open the rotating head to release the 3 + in. stripper
rubber, pull the rotating table bushings and raise the last joint of drill
collar, remove the bit, and lay this joint down (remove the 3 in. stripper
rubber from this drill collar joint for later use).
3. Place the new 4 + in. stripper rubber for the rotating head on the first joint
of 4 + in. liner joint. This liner joint should have the casing shoe and float
valve made up to the bottom end. Lower this first joint of liner through
the rotary table opening until the 4+ in. stripper rubber can be secured
in the rotating head. Once the 44 in. stripper rubber is in place in the
rotating head, secure the stripper rubber by closing the rotating head.
4. Open the blind rams, and continue to lower the 4+ in. liner through the
rotary table opening using the casing slips.
5. Make up the liner hanger to the last liner joint while holding the liner
string in the casing slips. Make up the first joint of the 3 4 in. drill pipe
to the liner hanger, remove the casing slips and lower the liner string on
the 3 in. drill pipe into the borehole until the 3 + in. drill pipe is adjacent
to the 3+ in. pipe rams, close the 3 + in. pipe rams onto the 3 + in. drill
pipe and replace the rotary table bushings. Place at least three joints of