Page 505 - Air and Gas Drilling Manual

10-30 Air and Gas Drilling Manual
.
D
0 375 ft
2
The individual tool joint length along the drill string is assumed to be
approximately 1.5 ft (30 ft drill pipe lengths). The total length of the lumped drill
pipe tool joints increment (second), H 2, in this cased section of the annulus is
,
7 000
H 2 15 .
30
H 2 350 ft
The inside diameter of the casing along this length of this cased section of the
annulus is
D 1 0 668 ft
.
and the outside diameter of the drill pipe tool joints along this length is
.
d 6 625 inches
3
d 3
D 3
12
.
D 0 552 ft
3
The total length of the lumped drill pipe body increment (third), H 3, in the
openhole section of the annulus is

,
2 500
,
H 3 2 500 1 5 .
30
H 3 2 375 ft
,
The inside diameter of the openhole along this length of the openhole section of the
annulus is
d 7 875 inches
.
h
d h
D h
12
D 0 656 ft
.
h
and the outside diameter of the drill pipe body along this length is