Products
Releasing Back off Spear
Releasing Back off Spear
Releasing back off spear is used for fishing, back off and releasing the fish. It can catch and transmit left hand torque during back off. It can instead of left hand taper taps and die collars. The function is similar to back off sub. The difference is that it doesn’t need to make up thread with fish and catch at any part internally.
|
Type |
Size |
ID mm（in） |
Allowed pulling power
KN |
Initial pulling power and relevant torque |
Connection |
|
|
Pulling power KN |
Torque N·M |
|||||
|
DLM-T60 |
2 3/8 |
50.8(2) |
330 |
147 |
4313 |
2 7/8REG |
|
DLM-T73 |
2 7/8 |
57.4(2 1/4) |
500 |
166 |
5799 |
NC31 |
|
62(2 7/16) |
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|
69.9(2 3/4) |
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|
74.2(2 59/64) |
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|
76.2(3) |
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|
77.9(3 3/64) |
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|
DLM-T89 |
3 1/2 |
76(3) |
650 |
166 |
9593 |
NC31 |
|
77.9(3 3/64) |
||||||
|
84.8(3 11/32) |
||||||
|
88.3(3 31/64) |
||||||
|
90.1(3 35/64) |
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|
DLM-T114 |
4 1/2 |
97.2(3 53/64) |
850 |
196 |
11522 |
4 1/2REG |
|
99.6(3 59/64) |
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|
101.6(4) |
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|
102.8(4 3/64) |
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|
103.6(4 5/64) |
||||||
|
DLM-T127 |
5 |
108.7(4 9/32) |
860 |
196 |
12320 |
4 1/2REG |
|
112(4 13/32) |
||||||
|
114.1(4 1/2) |
||||||
|
115.8(4 9/16) |
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|
DLM-T140 |
5 1/2 |
118.6(4 43/64) |
880 |
196 |
13263 |
NC50 |
|
5 1/2 |
121.4(4 3/4) |
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|
124.3(4 57/64) |
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|
125.7(4 61/64) |
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|
127.3(5 1/64) |
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