SHUANGJIA ZDK Series Back-off Sub

ZDK Series Back-off Sub

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Brand SHUANGJIA

Certification API

Lead Time 45days

Guarantee Period 12months

Source of Supply Heilongjiang

Payment Method T/T L/C

NSJ-Drilling 

Product Information

Back-off sub is also called back off spear. It can instead dealing with sticking. If the fish stuck or can't be back off, we then trip the drilling tool.

Product Parameters:

Model	OD mm(inch)	Conn.	ID mm(inch)	OAL mm(inch)
ZDK105	105(4 1/8)	NC31B LH*NC31P	15(19/32)	580(22 13/16)
ZDK121	121(4 3/4)	NC38B LH*NC38P	22(57/64)	628(24 3/4)
ZDK165	165(6 1/2)	NC50B LH*NC50P	28(1 1/8)	690(27 3/16)
ZDK178	178(7)	6-5/8REGB LH*6-5/8REP	32(1 1/4)	700(27 9/16)
ZDK203	203(8)	6-5/8REGB LH*6-5/8REGP	35(1 3/8)	723(28 1/2)