back-off sub
group nameDownhole Tools
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Min Order1 piece
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update timeMon, 08 Apr 2013 00:32:37 GMT
Paramtents
oilfield equipments fishing tools
Use Well Drilling
Certification API
Packging & Delivery
Min Order1 piece
Briefing
The back-off sub
*named back-off spear
*tool joint usually left hand thread
*the explaination sleeve has ri
*named back-off spear
*tool joint usually left hand thread
*the explaination sleeve has ri
Detailed
The back-off sub
*named back-off spear
*tool joint usually left hand thread
*the explaination sleeve has right hand thread
The back-off sub is also named back-off spear.There is usually a left hand thread for tool joint at the upper part of the body,while the explaination sleeve has right hand thread.
The guide cone at the lower part can make the explaination sleeve of the sub conveniently screw the fish connection. Raising the drilling tool,the expansion sleeve can hold the fish firmly,then reverse.
