Page 243 - Air and Gas Drilling Manual

= 0 333 ft
D
io
Equation 5-19 becomes
2
 . Chapter 5: Shallow Well Drilling Applications 5-85

 
f =   1   
.
.

2 log  0 333 − 0 229  + 114 
.
   0 00015   
.
f = 0 021
.
Equations 5-17 and 5-18 become, respectively,
.
a a = 10
.
53 36
a a = 0 019
.
and
0 890)
.
b = 0 021  53.36  2 (. 2
a  2
π
.
2 32 2) ( 0 333 − 0 229. )  1 0.   [ 2 2 ] 2
.
(
0 333)
  (. − 0 229(. )
4
b a = 3 409
,
Equation 5-16 becomes
  2 (. 0 019 ) ( , 1 200 )   . 05
 (,960 ) 2 + ( , 3 409 ) (503 27 2 e  503 .27 −  1 
10
. )
    

P =  
 2 (. 0 019 ) ( , 1 200 ) 
in
 e 503 .27 
 
 
2
P = 13 550 lb/ft abs
,
in
P in
p in =
144
.
p = 94 1 psia
in