High-efficient downhole Fishing Magnet is a fishing tool to recycle the scrap iron and dirt
produced in petroleum, geological drilling, fixing casing pipes and cleaning operations. While the magnetic mince is adsorbing on the outer tube of the magnetic loop and the mince which can not be absorbing for the cycle will be depositing in the recycling bin and is taken out of the well. It has simple structure, convenient operation and reliable performance. It sucks up the smaller falling objects with the permanent magnet of itself to salvage the fallen objects effectively, so as to achieve the purpose of cleaning the bottom of the well.
They are typically used in conjunction with milling operations or as a standalone cleanup run to ensure a clean hole for subsequent BHA (Bottom Hole Assembly) components.
Why Use a Downhole Fishing Magnet?
In drilling and workover operations, small metallic junk can cause catastrophic failure of new drill bits. An oilfield fishing magnet is the most effective solution for:
Retrieving Milled Fragments: Capturing small metal chips left after a milling run.
Recovering Dropped Objects: Securing hand tools, bolt nuts, or bit teeth dropped into the hole.
Protecting Downhole Equipment: Ensuring the wellbore is clear before running expensive completions or sensitive logging tools.
Downhole Fishing Magnet
Fishing Magnet can be using with Model GGQH/GGQM Tool together as to recover the contamination which cannot be reversing out by circulating liquid after scraping (GGQH & GGQM). And the magnetic broken substances are abosrbing on magnetic loop; some that cannot be absorbing will settle in the recovery canister as to bring out the wellhead.
The strong magnetic overshot is a tool for retrieving small objects that fall downhole in petroleum and geological drilling work. It has the advantages of simple structure, easy operation, reliable performance, small size and light weight. It uses its own magnet to catch the drill clip that falls into the well. , palms, cones, bearings, slip bodies, slip teeth, jaws and other tools and other small fallen objects are magnetizing and sucking up, thereby effectively salvaging small fallen objects and purifying the bottom of the well. The strong magnetic salvage device relies on magnets to absorb magnetized falling objects.
Why Use a Downhole Fishing Magnet?
In drilling and workover operations, small metallic junk can cause catastrophic failure of new drill bits. An oilfield fishing magnet is the most effective solution for:
Retrieving Milled Fragments: Capturing small metal chips left after a milling run.
Recovering Dropped Objects: Securing hand tools, bolt nuts, or bit teeth dropped into the hole.
Protecting Downhole Equipment: Ensuring the wellbore is clear before running expensive completions or sensitive logging tools.
ELITE Downhole Fishing Magnet Key Technical Features & Construction
To be truly “High-Efficient,” a downhole fishing magnet must have more than just a strong pull. Our API-standard magnets feature:
Integral Circulation Ports: Designed with large flow-through ports to allow for high-volume circulation, washing away silt and cuttings to expose the junk to the magnetic face.
High-Intensity Permanent Magnets: Utilizing specialized magnetic materials that maintain their lifting power even at high bottom-hole temperatures (BHT).
Robust One-Piece Body: Forged from high-grade alloy steel for maximum durability during jarring and high-torque operations.
Interchangeable Guides: Available with flush, lilly-pad, or mill-type guides to adapt to various hole conditions.
Technical Specifications
| Tool OD (in) | Connection (API) | Fish Size Capacity | Circulation Type |
| 3-1/8″ | 2-3/8″ Reg | Small chips/cutters | Internal |
| 4-1/2″ | 2-7/8″ Reg | Bit cones/Hand tools | Internal/External |
| 6-3/4″ | 4-1/2″ Reg | Large ferrous junk | High-Flow |
| 8-1/4″ | 6-5/8″ Reg | Heavy debris | High-Flow |
Best Practices for Magnetic Fishing Operations
To achieve the best recovery rate, operators should follow these API-recommended steps:
Clean the Hole: Circulate the well thoroughly to remove non-magnetic debris that might bury the junk.
Slow Engagement: Lower the magnet slowly to the bottom to avoid “slamming” which could damage the magnetic face.
Rotation: While not always necessary, a slow rotation can help move junk toward the center of the magnetic field.
Post-Retrieval Inspection: Always inspect the magnet face upon surfacing to verify the quantity of junk recovered.
FAQ: Expert Answers for Drilling Engineers
Q: Can downhole fishing magnets work in high-temperature wells?
A: Yes, but it requires specific magnetic grades. Our high-temp series is designed to operate effectively at temperatures up to 300°F (150°C) without significant loss of magnetic pull.
Q: What is the difference between a Junk Basket and a Fishing Magnet?
A: A junk basket relies on fluid circulation and mechanical fingers to “trap” debris, whereas a downhole fishing magnet uses magnetic force to “attract” ferrous metal. Magnets are superior for small, hard-to-catch items like bearings and broken cutters.
Q: Are these tools compatible with standard API connections?
A: Absolutely. All our fishing magnets come with standard API Regular (Reg) or IF connections, ensuring seamless integration with your existing drill string.
Looking for Reliable Downhole Retrieval Solutions? Contact our technical team for custom sizes and high-intensity magnetic tool specifications.
