Page 532 - Air and Gas Drilling Manual

Geometry Inside the Drill String
Starting at the bottom of the drill string, the total length of the drill collars
increment, H 5, in the openhole section is
H 5 500 ft Chapter 10: Stable Foam drilling 10-57
The inside diameter of the drill collars length in this openhole section is
d 2 8125 inches
.
5
d 5
D 5
12
.
D 5 0 234 ft
The total length of the drill pipe tool joints lumped geometry increment, H 4, in
the openhole section is

H 125 ft
4
The inside diameter of the drill pipe tool joints lumped geometry in this openhole
section is
.
d 6 350 inches
d 6
D
6
12
.
D 6 0 292 ft
The total length of the drill pipe body lumped geometry increment, H 3, in the
openhole section is
,
H 3 2 375 ft
The inside diameter of the drill pipe body lumped geometry in this openhole section
is
.
d 3 826 inches
7
d 7
D 7
12
.
D 0 319 ft
7