Back Off Sub
Back off sub also called releasing spear, was used to releasing drill stem above the stick point
druing drilling and workover operation.
Specifications:
|
Model |
OD(mm) |
Connection(LH) |
Fishing Connection(RH) |
|
DKJ105 |
105 |
NC31 |
NC31 |
|
DKJ121 |
121 |
NC38 |
NC38 |
|
DKJ165 |
165 |
NC50 |
NC46 |
|
DKJ165 |
165 |
NC50 |
NC50 |
|
DKJ165 |
165 |
NC50 |
5 1/2 FH |
|
DKJ165 |
165 |
NC50 |
NC56 |
|
DKJ178 |
178 |
NC50 |
6 5/8 REG |
|
DKJ203 |
203 |
NC50 |
NC61 |
|
DKJ203 |
203 |
NC50 |
7 5/8 REG |