Page 419 - Practical Well Planning and Drilling Manual
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Section 3 revised 11/00/bc 1/17/01 12:00 PM Page 395
Casing [ ]
3.4.4
backup tong on the collar to the triangle. Land casing on slips for
the last collar at correct depth for the casing spool (if using screw
on type spool). Apply safety clamp.
6. Place slotted plate on top of casing. Pick up first stand of DP, and
make up the stab in sub; check the seals. Run into casing, land ele-
vators on the slotted plate, and take links off. Make up second set
of elevators, pick up, and run in next stand. Stab into float, spac-
ing out with pups if necessary. [See note below]
7. Make up kelly cock and circulating head on string. Connect chik-
sans to SPM and cement manifold with a T-piece. Line up on rig
pump and break circulation slowly. When returns are seen, slowly
increase pump rate to maximum ____ GPM, monitoring for losses.
Observe inside casing, if there are returns then the stab-in sub is
leaking. If there are losses, cut pump rate to maximum no-loss rate.
Circulate 120% of stinger contents (____ bbls, ____ strokes).
8. Line up to cement pump. Cementer pump ____ bbls of water
ahead, close in at kelly cock, and pressure test lines to ____ psi.
Keep personnel clear of lines under pressure.
9. Proceed with cement job according to separate program.
10. Bleed off and check for backflow. If floats holding, pull back one
stand and circulate pipe contents before POH. If floats not holding,
then close in surface lines, maintaining backpressure, and checking
every 5-10 minutes. As soon as the backflow is minimal, pick up to
unstab and try to circulate down string to clear out gelled cement.
11. Wait until surface cement samples are hard. Back out landing joint;
cut conductor or nipple down diverter.
(Note: If a 5 in slip type elevator [YC or similar] is available, this
can be set around the DP to save time switching elevators. In addition,
a special centralizer may be run on the bottom joint to help stab in.
Cement is usually pumped until cement returns are seen at the surface,
then the stinger contents are displaced. On surface wellhead systems,
cement will have to be flushed out of riser/BOP/conductor with small
diameter lines. Sometimes a bullplug can be installed in the conductor
below where the spool is to be made up so that it can be easily drained
of cement.)
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