jingmei@jmdownholetools.comMESSAGE
Air drilling can protect reservoir well, improve rate of penetration, significantly shorten drilling period, take precaution against mud loss and borehole collapse, now is gradually widely used. Air drilling downhole motor is driven by gas, foam and other compressible fluids, provide power for the downhole and drives bit to penetrate rock. Air drilling downhole motor has higher technical requirements of the assembly structure, linear design of the motor stator and operation specification.
The following are two Air(foam) downhole motor for coal mine development.
1) 73mm Air(foam) downhole motor
|
No. |
Item |
Unit |
Technical index |
|
1 |
Displacement |
m³/min |
5.5-9.0 |
|
2 |
Speed |
r/min |
203-269 |
|
3 |
Motor starting pressure |
MPa |
0.16 |
|
4 |
Motor pressure loss |
MPa |
0.89 |
|
5 |
Output torque |
N.m |
0-353 |
|
6 |
Max torque |
N.m |
353 |
1) 89mm Air(foam) downhole motor
|
No. |
Item |
Unit |
Technical index |
|
1 |
Displacement |
m³/min |
8.9-14.6 |
|
2 |
Speed |
r/min |
203-269 |
|
3 |
Motor starting pressure |
MPa |
0.18 |
|
4 |
Motor pressure loss |
MPa |
0.89 |
|
5 |
Output torque |
N.m |
0-573 |
|
6 |
Max torque |
N.m |
573 |
