The Internal and External Hooks are specialized fishing tools designed to retrieve ropes, wire ropes, lifting bails, hollow short cylinders, slings, and other failing objects from inside casing or tubing. These hooks are inserted into the target objects, and when the drill stem is lifted, the hook teeth securely grip the debris, enabling successful retrieval.
The External Hook is primarily used for retrieving objects inside the casing or tubing, while the Internal Hook is designed to engage failing objects such as steel wire rope, logging steel wire, and paraffin cutters within the wellbore.
✔ Versatile Fishing Tool – Effectively retrieves various failing objects from the wellbore.
✔ Strong Hook Teeth Design – Ensures secure engagement of objects for reliable retrieval.
✔ Applicable to Different Materials – Works with ropes, wire ropes, steel parts, and other metallic or non-metallic objects.
✔ Durable & Robust Construction – Engineered for high-stress well conditions.
✔ Easy Deployment & Retrieval – Designed for efficient downhole operations.
🔹 Fishing Operations – Recovery of dropped objects inside casing or tubing.
🔹 Wellbore Cleanup – Removes wire ropes, logging wires, and slings to maintain well integrity.
🔹 Workover & Intervention – Used in well servicing and maintenance.
🔹 Drilling Support – Prevents foreign objects from obstructing drilling and production activities.
Internal & External Hook Specifications
External Hook Specifications
| OD (mm/inch) |
Connection |
Casing/Tubing Size |
| 73 (2-7/8) | 2-3/8UP TBG | 3-1/2" Tubing |
| 95 (3-3/4) | NC26 | 4-1/2" Tubing |
| 114 (4-1/2) | NC31 | 5-1/2" Casing |
| 150 (5-29/32) | NC38 | 7" Casing |
| 190 (7-31/64) | NC50 | 9-5/8" Casing |
Internal Hook Specifications
| OD (mm/inch) |
ID (mm/inch) |
OAL (mm/ft) |
Connection |
| 105 (4-1/8) | 38.1 (1-1/2) | 805 (2.6) | NC31 (NC31LH) B × P |
| 121 (4-3/4) | 50.8 (2) | 1060 (3.5) | NC38 (NC38LH) B × P |
| 159 (6-1/4) | 57.2 (2-1/4) | 1000 (3.3) | NC50 (NC50LH) B × P |
| 165 (6-1/2) | 70 (2-3/4) | 1100 (3.6) | NC50 B × P |
| 168 (6-5/8) | 70 (2-3/4) | 1065 (3.5) | NC50 B × P |
| 168 (6-5/8) | 71.4 (2-13/16) | 1200 (3.9) | NC50 B × P |
| 178 (7) | 70 (2-3/4) | 1100 (3.6) | NC50 B × P |
| 203 (8) | 80 (3-5/32) | 1065 (3.5) | 6-5/8REG B × P |
| 89 (3-1/2) | 31.8 (1-1/4) | 685 (2.2) | NC26 B × P |
| 95 (3-3/4) | 38.1 (1-1/2) | 663 (2.17) | NC26 B × P |
| 105 (4-1/8) | 50.8 (2) | 679 (2.22) | NC31 B × P |
| 121 (4-3/4) | 62 (2-7/16) | 712 (2.3) | NC38 B × P |
| 127 (5) | 62 (2-7/16) | 712 (2.3) | NC38 B × P |
| 159 (6-1/4) | 80 (3-5/32) | 781 (2.56) | NC50 B × P |
| 165 (6-1/2) | 82 (3-15/64) | 751 (2.5) | NC50 B × P |
| 178 (7) | 82 (3-15/64) | 791 (2.59) | NC50 B × P |
| 203 (8) | 82 (3-15/64) | 841 (2.8) | 6-5/8REG B × P |
| 229 (9) | 88.9 (3-1/2) | 910 (3) | 7-5/8REG B × P |
