| Customization: | Available |
|---|---|
| After-sales Service: | Support |
| Warranty: | Support |
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API 7-1 Junk sub/driling sub for oil and gas industry/rig parts
LB79,LB89~LB327
Junk sub is normally used to catch and remove junks that are too heavy to be circulated preventing threm from settling at the bottom of the wellbore .typical junks are shivers and falledn objects such as carbide tooth ,drill bit and bearings which are too heavy to be removed from the wellbore though conventional fluid circulation .Junk sub's main function is to keep well bottom clean to increase bit service lift ,reduce and prevent drill bit from unexpected damaged
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