SHANDONG SAIGAO GROUP CORPORATION
SHANDONG SAIGAO GROUP CORPORATION
Back Off Sub

Back Off Sub

Back off sub is also called back off spear. It can replace the taper tap, fishing or back off when dealing with sticking. If the fish is stuck or cannot be back off, it can release from the back off sub, and then trip the drilling tool.


Technical Specification of Back Off Sub

Model

OD

ID

OAL

Connection

mm (inch)

mm (inch)

mm (ft)

ZDK105

105 (4-1/8)

15 (19/32)

580(1.9)

NC31LHBoxxNC31 Pin

ZDK121

121 (4-3/4)

22 (55/64)

628 (2.1)

NC38LH Box x NC38 Pin

ZDK159

159 (6-1/4)

28 (1-7/64)

690 (2.3)

NC46LH Box * NC46 Pin

ZDK165

165 (6-1/2)

28 (1-7/64)

690 (2.3)

NC50LH Box x NC50 Pin

ZDK168

168 (6-5/8)

28 (1-7/64)

690 (2.3)

NC50LH Box * NC50 Pin

ZDK178

178 (7)

32 (1-1/4)

700 (2.3)

5-1/2FH LH Box x 5-1/2FH Pin

ZDK203

203 (8)

35(1-3/8)

723 (2.4)

6-5/8REGLH Box * 6-5/8REG Pin


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sales@saigaogroup.com susan@saigaogroup.com
+86-531-69959201
lqg18653457231
+86 18653457231
Zhongrun Century Center, No 12111,Jingshi Road, Lixia District, Jinan City, Shandong Province. P.R. China