Sliding block spear is an inside fishing tool for fishing the junk internally such as fishing drill pipe,tubing,washover pipe,liner,packer,water distributor,etc which has internal bore,and it also can do back offfor the stuck junk or use with other tools(such as jar and back off tool etc).This tool has simple structure,convenient operation,and convenient maintenance.
| Model | OD | Catching Range | Connection |
| mm(inch) | mm(inch) | ||
| HLM48 | 73(2-7/8) | 38.1(1-1/2) | 2-3/8TBG |
| HLM60 | 86(3-25/64) | 42(1-21/32)~538(2-1/8) | NC26 |
| HLM73 | 86(3-25/64) | 52.6(2-1/16)~64.1(2-17/32) | NC26 |
| HLM73 | 105(4-1/8) | 52.6(2-1/16)～64.1(2-17/32) | NC31 |
| HLM89 | 86(3-25/64) | 64.1(2-17/32)～77.9(3-1/16) | NC26 |
| HLM89 | 105(4-1/8) | 64.1(2-17/32)～77.9(3-1/16) | NC31 |
| HLM102 | 105(4-1/8) | 77.6(3-1/16)～92.1(3-5/8) | NC31 |
| HLM114 | 121(4-3/4) | 90(3-35/64)～102.5(4-1/32) | NC38 |
| HLM127 | 121(4-3/4) | 103(4-1/16)～117.8(4-41/64) | NC38 |
| HLM140 | 135(5-5/16) | 115.7(4-9/16)～129.3(5-3/32) | NC38 |
| HLM168 | 165(6-1/2) | 138.3(5-7/16)～156.3(6-5/32) | NC50 |
| HLM178 | 175(6-57/64) | 152.3(6)~168.1(6-5/8) | NC50 |
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