Page 351 - Air and Gas Drilling Manual

8-34 Air and Gas Drilling Manual
π
π
 
(.
001)
0 656)
0 00015)
0 375)
4 

4 

=
e
π
π
av3
+
0 375)
0 656)
4 
4 

   (. (. 2 2 + (.   (.   2 (. 2
e av3 = 0 0076 ft
.
Equation 6-58 becomes
  2
 
f a3 =   0 656 − 1 0 375   
2  log  . .  + .
114

   0 0076   
.
f = 0 055
.
a3
With the above values Equations 6-52 and 6-53 become, respectively,
0 950  
 10    .
.
a a3 =  53 36    1 +  .  
2 635 
.
a a3 = 0 025
.
and
2 635)
.
.
b a3 = 0 055  53 36  2 (. 2
0 656 −
π
2 32 2) ( . 0 375  ) 10    2 [ 2 2 ] 2
.
.
(
.
0 375)
0 656)
 4  (. − (.
,
b a3 = 11 490
Equation 6-58 becomes

  2 0 025) ( , 2  05 .
2 375)
(.
[
.
,
(
)
.
11 640)
,
(
P a3 =  ( , 2 + 11 149 586 29) 2 ] e 586 29 − 11 149 586 29 
.
  

2
P a3 = 16 030 lb/ft abs
,
P a3
p =
a3
144