Oriented Bent Sub
Introduction:
The oriented bent sub is a major power deflection tool having a fixed angle deviated from the low end thread of the bent sub to the axial line of drill stem. Under the application of oriented bent sub the power drill tool give the bit a constant lateral force to ensure that the bit can cut on the well wall laterally and further drill into a curved well trace.
Operation method:
●After the bit and oriented sub are connected and screwed, measuring of the angle between the nozzle of bit and oriented key of oriented bent sub shall be done;
●After run in drill tool, calculate out the azimuth of nozzle of bit according to the azimuth of oriented key determined at a single point by drift indicator;
●Change the nozzle of the bit into required azimuth, then lock in rotary and start pump drilling to cut in;
●During deflecting, using this approach that deflects while lightly pressing and crowning the drill to help deflection;
●After deflected for 2 to 3 meters, drill in 4 to 5 meters with light pressure and slow rotation;
●Repeat above mentioned operations for several times, when the angle of deviation is up to the expected requirement deflecting in can be done smoothly by reducing drill pressure and increasing rotation speed.
Available model:
DZT89 DZT105 DZT127 DZT159 DZT159 DZT165 DZT178 DZT203
Connection type:
NC26 NC31 NC38 NC46 NC50 5 1/2 FH 6 5/8 REG
Specifications - Oriented Bent Sub
1 Oriented Bent Sub DZT89 89 (3 1/2) NC26 NC26 2° 36
2 Oriented Bent Sub DZT105 105 (4 1/8) NC31 NC31 2° 36
3 Oriented Bent Sub DZT127 127 (5) NC38 NC38 2° 36
4 Oriented Bent Sub DZT159 159 (6 1/4) NC46 NC46 2° 50
5 Oriented Bent Sub DZT165 165 (6 1/2) NC50 NC50 2° 50
6 Oriented Bent Sub DZT178 178 (7) 5 1/2 FH 5 1/2 FH 2° 50
7 Oriented Bent Sub DZT203 203 (8) 6 5/8 REG 6 5/8 REG 2° 50
