Page 421 - Practical Well Planning and Drilling Manual

Section 3 revised 11/00/bc 1/17/01 12:00 PM Page 397

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3.5

Cementing

Reference should be made to the well planning aspects of cement-
ing in Section 2.7. Much of the information is applicable to the wellsite
operation.
There are two aspects of the cement job that are both vital to a
good job and that the drilling supervisor has direct influence over.
These are getting full mud displacement by the spacers and having
homogenous slurry of the correct weight.
Mud displacement can be improved using the following tech-
niques:
Proper pre-job conditioning to lowest PV, YP, and gels
Proper spacer design with sufficient contact time (10 minutes) and
turbulent flow
Casing or liner reciprocation or rotation

Homogenous slurry is more likely with the following techniques in
order of preference:

Batch mixing

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