Page 277 - Practical Well Planning and Drilling Manual

Section 2 revised 11/00/bc 1/17/01 12:04 PM Page 253

[ ]

2.6

Casing Running Program

The casings to be run are defined by the well design. For the
drilling program, the configuration of each string should be stated per
the drilling program checklist given at the start of this section (2.1.1.).
It is not necessary or helpful to include all the casing design calcula-
tions in the drilling program.
Equipment checklists for each casing job are useful to include as an
appendix to the drilling program. This should ensure that any special
equipment is not forgotten and that all the correct quantities of materi-
als are sent out to the rig. The person responsible for logistics can note
on the checklist who supplies each item and its current status.
Apart from the casing configurations resulting from the well design
process, practical notes can be made in the program where special pro-
cedures or particular precautions are needed.

2.6.1. Normal Drilling Program Requirements for Running Casing

Once the casing point has been reached, the requirements for the
mud change. Good gel strength (for suspending solids) and yield
points (for cleaning the hole) are not needed and they are detrimental

253