Jining Donghong Machinery Co., Ltd
Quality supplier of drilling rig parts for Bomco,Lanzhou LS, Honghua, Sj petro, Rg Petro, Beijing BPM, Shenkai, Kingdream, CCDC

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Oriented Bent Sub 
Brand: 0012
Present point: 0
Point offset: 0.0
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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