The Sliding Block Spear is an internal fishing tool designed for retrieving junk and stuck components from within pipes or equipment with an internal bore. It is primarily used for fishing drill pipes, tubing, washover pipes, liners, packers, and water distributors. Additionally, it can be used for backing off stuck junk or in combination with other fishing tools, such as jars and back-off tools, to enhance retrieval efficiency.
With its simple structure, easy operation, and convenient maintenance, the Sliding Block Spear is an essential tool for efficient downhole fishing operations.
✔ Internal Engagement – Effectively retrieves stuck or broken components with an internal bore.
✔ Versatile Fishing Capabilities – Suitable for drill pipes, tubing, washover pipes, liners, packers, and water distributors.
✔ Back-Off Functionality – Can perform back-off operations for stuck junk.
✔ Compatible with Other Fishing Tools – Works with jars and back-off tools for enhanced efficiency.
✔ Simple & Robust Design – Ensures ease of operation and minimal maintenance.
✔ Reliable in Harsh Conditions – Engineered for high-stress well environments.
🔹 Fishing Operations – Designed to retrieve drill pipes, tubing, and other stuck downhole components.
🔹 Wellbore Cleanup – Removes debris and obstructions to maintain well integrity.
🔹 Workover & Intervention – Used in well servicing and maintenance tasks.
🔹 Back-Off for Stuck Junk – Enables controlled detachment of stuck components.
🔹 Combination Fishing Techniques – Can be used with jars, back-off tools, and other fishing tools for complex retrieval scenarios.
Sliding Block Spear Specifications
Sliding Block Spear Specifications
| OD (mm/inch) |
Catching Range (mm/inch) |
Connection |
| 73 (2-7/8) | 38.1 (1-1/2) | 2-3/8TBG |
| 86 (3-25/64) | 42 (1-21/32) ~ 53.8 (2-1/8) | NC26 |
| 86 (3-25/64) | 52.6 (2-1/16) ~ 64.1 (2-17/32) | NC26 |
| 105 (4-1/8) | 52.6 (2-1/16) ~ 64.1 (2-17/32) | NC31 |
| 86 (3-25/64) | 64.1 (2-17/32) ~ 77.9 (3-1/16) | NC26 |
| 105 (4-1/8) | 64.1 (2-17/32) ~ 77.9 (3-1/16) | NC31 |
| 105 (4-1/8) | 77.6 (3-1/16) ~ 92.1 (3-5/8) | NC31 |
| 121 (4-3/4) | 90 (3-35/64) ~ 102.5 (4-1/32) | NC38 |
| 121 (4-3/4) | 103 (4-1/16) ~ 117.8 (4-41/64) | NC38 |
| 135 (5-5/16) | 115.7 (4-9/16) ~ 129.3 (5-5/32) | NC38 |
| 165 (6-1/2) | 138.3 (5-7/16) ~ 156.3 (6-5/32) | NC50 |
| 175 (6-57/64) | 152.3 (6) ~ 168.1 (6-5/8) | NC50 |
