Page 508 - Air and Gas Drilling Manual

The foam quality as it exits this cased annulus section and starts into the Tee is
sfa1 Q ga1 Chapter 10: Stable Foam drilling 10-33
Q ga1 Q w
671
.
sfa1
6 71 0 234
.
.
0 966
.
sfa1
Using Equation 10-5, the absolute viscosity of the foam as it exits this cased
annulus section and starts into the Tee is
0 00002089 1 3 6 0 966)
.
.
.
(
sfa1
lb sec
.
0 00009356
sfa1 2
ft
The specific weight of the foam as it exits this cased annulus section and starts
into the Tee is approximated by
w ˙ g w ˙ w
sfa1
P at T av1
Q g Q w
P Tee T at
.
.
1 821 14 60
sfa1
,
.
1 826 6 . 537 66
.
.
( 27 64) 0 234
,
4 604 4 . 519 67
.
3
2 223 lb/ft
.
sfa1
From Equation 1-2, the density of the foam as it exits this cased annulus section and
starts into the Tee is
.
2 223
sfa1
32 2
.
2
lb sec
0 0690
.
sfa1 4
ft