Description
Reverse Circulation Junk Basket
RCJB Oilfield Fishing Tool for Wellbore Junk Recovery and Downhole Debris Removal
SGPE Reverse Circulation Junk Basket, also known as RCJB, removes small junk, metal debris, bit fragments, broken tool parts, cuttings, and loose objects from oil and gas wells. Drilling, workover, and well intervention crews use this tool when they need dependable bottom-hole cleanout before the next downhole operation.
Loose junk in the wellbore can damage drill bits, restrict circulation, block downhole tools, delay completion work, and increase non-productive time. The SGPE RCJB gives operators a practical way to clean the bottom of the hole before drilling ahead, running completion equipment, or continuing well servicing work.
The tool uses reverse fluid circulation to sweep debris toward the center of the wellbore and carry it into the basket barrel. After the operator drops the steel ball into the valve seat, the fluid path changes. Fluid moves downward through the inner passage, exits through the lower vents, cleans the hole bottom, and returns upward with debris into the basket.
For wells with ferrous debris, SGPE can supply the RCJB with a magnet insert. This option allows the tool to collect steel chips, bearing pieces, bit fragments, slips, cutters, broken hand tools, and other magnetic objects while the reverse circulation path continues to recover loose debris.
Need to remove metal debris from an oil or gas well? SGPE can recommend the right Reverse Circulation Junk Basket according to hole size, fishing string connection, junk type, and well conditions.
What Is a Reverse Circulation Junk Basket?
A Reverse Circulation Junk Basket is an oilfield fishing tool used to collect small debris from the bottom of a wellbore. Unlike a conventional junk basket, the RCJB uses a reverse circulation flow path to guide loose objects into the tool body.
The tool runs at the bottom of the fishing string. The crew lowers it near the bottom of the oil or gas well, starts circulation to wash the hole, and then drops the steel ball into the valve seat. Once the ball lands, reverse circulation begins. The return flow carries debris into the barrel, and the junk catcher keeps recovered objects inside the tool.
Oilfield crews commonly use RCJB tools for:
- Wellbore cleanout during oil and gas drilling
- Bottom-hole junk collection before drilling ahead
- Post-milling debris recovery
- Metal fragment removal after cutting or sidetracking
- Fishing support after downhole tool failure
- Well preparation before casing, completion, or workover operations
- Ferrous debris recovery with a magnet insert
Key Features of SGPE Reverse Circulation Junk Basket
Reverse Circulation Flow Path
The RCJB creates a controlled reverse fluid path after the steel ball reaches the valve seat. The flow sweeps the bottom of the oil or gas well, moves debris toward the tool center, and carries junk into the basket barrel. This method improves debris recovery during drilling cleanout, workover cleanout, and post-milling operations.
Reduced Wet String Risk
The reverse drainage structure reduces fluid retention when crews pull the fishing string. This design keeps rig floor handling cleaner, shortens retrieval preparation, and reduces unnecessary mess during fishing operations.
Reliable Junk Recovery Performance
The tool collects bit fragments, cutters, slips, steel chips, cement pieces, broken tool parts, and other hard debris from the bottom of the well. It gives crews a dependable option for drilling debris recovery, workover debris removal, and well intervention cleanout.
Optional Magnet Insert
SGPE can add a magnet insert for magnetic junk recovery. This option captures ferrous debris such as steel particles, milling chips, broken tool pieces, and bit fragments. At the same time, reverse circulation carries loose non-magnetic debris into the barrel.
Wide Model Range
SGPE supplies RCJB models with barrel ODs from 89 mm to 381 mm. This range covers many common oilfield hole sizes and allows customers to match the tool with different drilling, workover, and fishing programs.
Strong Oilfield Structure
The tool body handles downhole circulation, slow rotation, lowering, core cutting, and retrieval. Standard box connections include NC and REG types, so crews can match the RCJB with different fishing string assemblies.
Simple Field Operation
Crews can run the RCJB with standard oilfield fishing procedures. The process includes lowering the tool, washing the hole, dropping the steel ball, activating reverse circulation, rotating slowly, collecting debris, and pulling the recovered junk from the well.
How the Reverse Circulation Junk Basket Works
The SGPE RCJB connects to the lower end of the oilfield fishing string. The operator lowers the tool several feet above the well bottom. Then the crew starts circulation to wash the hole and loosen debris.
After the initial washing step, the operator stops circulation and drops the steel ball. Once the ball reaches the valve seat, reverse circulation begins.
The working process follows these steps:
- Fluid enters the inner passage of the RCJB barrel.
- Fluid travels outward and downward through the lower vents.
- The flow sweeps the bottom of the oil or gas well.
- The tool redirects the flow toward the center.
- Return flow moves upward through the return holes.
- Reverse circulation carries debris into the barrel.
- The junk catcher holds recovered objects inside the tool.
- The crew slowly rotates and lowers the tool to cut the required core.
- After debris collection, the crew stops rotation and circulation.
- The crew pulls the RCJB and recovered junk from the well.
This controlled flow path allows operators to remove small debris before the next drilling, completion, or workover step.
Oilfield Applications
SGPE Reverse Circulation Junk Basket supports many oil and gas well cleanout and fishing operations.
Oil and Gas Drilling Cleanout
During drilling, bit parts, cutters, metal pieces, or tool fragments may fall into the wellbore. The RCJB collects these objects before the crew continues drilling. This reduces the risk of bit damage, blocked circulation, and unexpected downhole failure.
Workover and Well Servicing
In workover wells, debris may come from tubing, casing, packers, plugs, valves, bridge plugs, or old completion equipment. The RCJB cleans the wellbore before crews run new tools or continue well servicing work.
Post-Milling Debris Recovery
Milling operations often leave steel chips, hard fragments, and loose debris at the bottom of the well. Operators can run the RCJB after milling to remove these materials and reduce the risk of stuck tools, damaged equipment, or restricted circulation.
Cutting and Sidetracking Operations
Cutting and sidetracking work can create steel debris and irregular fragments. The RCJB removes these materials before crews move into the next drilling, fishing, or completion stage.
Fishing After Downhole Tool Failure
When a downhole tool breaks in an oil or gas well, small parts may remain at the bottom of the hole. The RCJB recovers loose fragments and supports the main fishing operation.
Wellbore Preparation Before Completion
Before running packers, plugs, liners, valves, or other completion tools, operators need a cleaner wellbore. The RCJB removes junk from the bottom of the well and protects sensitive completion equipment.
Magnetic Junk Recovery
When fitted with a magnet insert, the RCJB attracts ferrous debris such as steel chips, bit fragments, bearing pieces, slips, cutters, and broken tool parts. This option gives crews better control in wells with magnetic junk.
Product Advantages for Oilfield Operators
Better Bottom-Hole Cleanout
The reverse circulation flow pattern moves debris into the basket instead of pushing it around the bottom of the hole. This improves cleanout efficiency during drilling, workover, and post-milling operations.
Less Non-Productive Time
Small junk can stop drilling, damage tools, and delay completion work. The RCJB lets crews remove debris earlier and continue operations with fewer interruptions.
Multiple Oilfield Uses
One RCJB can support drilling cleanout, milling debris recovery, workover debris removal, downhole fragment recovery, and completion preparation. This makes it a practical tool for oilfield service companies, drilling contractors, and workover teams.
Flexible Configuration
SGPE offers different sizes, box connections, and magnet insert options. Customers can choose a suitable model according to hole size, fishing string connection, target junk type, and well condition.
Reliable Downhole Performance
The rugged structure supports circulation, rotation, lowering, core cutting, and retrieval in demanding oil and gas well environments. Crews can use the tool for routine cleanout jobs as well as more complex fishing programs.
Standard Operating Procedure
Oilfield crews should follow the approved fishing program, rig safety rules, and well control requirements. A typical RCJB operation includes these steps:
- Select the correct RCJB model according to hole size, fishing size, connection, and junk type.
- Connect the tool to the bottom of the fishing string.
- Lower the tool carefully into the oil or gas well.
- Stop several feet above the bottom of the well.
- Start circulation to wash the hole and loosen debris.
- Stop circulation and drop the steel ball.
- Confirm that the ball reaches the valve seat and activates reverse circulation.
- Restart circulation.
- Slowly rotate and lower the tool.
- Continue until the tool cuts the required core or collects the target junk.
- Stop rotation and circulation.
- Pull the RCJB and recovered junk from the well.
- Inspect the barrel, junk catcher, connection, steel ball seat, and optional magnet insert after retrieval.
For better results, crews should adjust circulation rate, rotation speed, weight on tool, and operation time according to actual well conditions.
Technical Specifications
The table below helps buyers match the RCJB model with hole size, maximum fishing size, steel ball size, and fishing string connection.
| Model | Barrel OD (mm) | Max. Fishing Size (mm) | Steel Ball OD (mm) | Connection Box | Hole Size (mm) |
|---|---|---|---|---|---|
| LL-F381 | 381 | 279 | 57 | 6 5/8 REG | 406–444 |
| LL-F330 | 330 | 249 | 57 | 6 5/8 REG | 349–406 |
| LL-F301 | 301 | 216 | 57 | 6 5/8 REG | 320–346 |
| LL-F279 | 279 | 211 | 57 | 6 5/8 REG | 298–317 |
| LL-F257 | 257 | 194 | 57 | 6 5/8 REG | 273–295 |
| LL-F232A | 232 | 179 | 57 | NC50 / 6 5/8 REG | 244–270 |
| LL-F206 | 206 | 157 | 45 | NC50 | 216–241 |
| LL-F200A | 200 | 154 | 42 | NC50 / 4 1/2 REG | 212–241 |
| LL-F200 | 200 | 147 | 42 | NC50 | 212–241 |
| LL-F178 | 178 | 130 | 42 | NC50 / 4 1/2 REG | 190–210 |
| LL-F159 | 159 | 120.6 | 34 | 4 1/2 REG | 168–187 |
| LL-F146A | 146 | 111 | 34 | NC38 / 3 1/2 REG | 155–165 |
| LL-F146 | 146 | 105 | 40 | NC38 | 155–165 |
| LL-F130 | 130 | 95.2 | 34 | NC31 / 3 1/2 REG | 143–152 |
| LL-F123 | 123 | 90.5 | 28 | NC31 / 2 7/8 REG | 130–140 |
| LL-F121 | 121 | 90 | 34 | NC31 | 130–140 |
| LL-F114 | 114 | 77.8 | 28 | NC31 / 2 7/8 REG | 117.5–127 |
| LL-F102 | 102 | 63.5 | 23 | NC26 / 2 3/8 REG | 105–114 |
| LL-F97 | 97 | 62 | 30 | NC26 | 108–114 |
| LL-F92 | 92 | 57 | 23 | NC26 / 2 3/8 REG | 95.2–102 |
| LL-F89 | 89 | 57 | 23 | NC26 | 95–102 |
SGPE can discuss additional sizes, connection types, and special configurations according to the customer’s oilfield fishing program.
How to Select the Right RCJB Model
Choosing the correct Reverse Circulation Junk Basket improves fishing efficiency and reduces unnecessary trips. Before placing an order, customers should confirm:
- Oil or gas well hole size
- Fishing string connection
- Target junk type
- Estimated junk size
- Well depth and well condition
- Required barrel OD
- Maximum fishing size
- Steel ball size
- Need for magnet insert
- Drilling, workover, milling, or completion cleanout purpose
For wells with mainly ferrous debris, SGPE recommends the magnet insert option. For wells with mixed debris, the standard reverse circulation function gives crews an efficient way to collect loose junk inside the barrel.
Optional Magnet Insert for Ferrous Junk Recovery
Some oil and gas wells contain large amounts of ferrous debris, including steel chips, bit fragments, bearing pieces, slips, cutters, and broken tool parts. SGPE can equip the Reverse Circulation Junk Basket with a magnet insert for these conditions.
The magnet insert attracts and holds magnetic objects, while reverse circulation carries loose debris into the barrel. This configuration suits:
- Post-milling wellbore cleanout
- Magnetic junk recovery in oil and gas wells
- Steel chip collection after cutting operations
- Bit fragment and bearing piece recovery
- Workover debris removal
- Fishing jobs after downhole tool failure
This option gives crews better control when the well contains both loose debris and magnetic junk.
Quality and Manufacturing Support
SGPE supplies oilfield fishing tools for drilling, workover, and well intervention operations. Our team reviews hole size, fishing string connection, junk type, and site conditions before recommending a suitable RCJB model.
We support customers with model selection, connection matching, magnet insert options, and special configuration discussions. If your fishing assembly requires a special connection or project-specific requirement, SGPE can review the details before production.
This engineering support helps drilling contractors, oilfield service companies, and workover teams select a tool that fits the actual wellbore condition instead of relying on a generic model.
Why Choose SGPE Reverse Circulation Junk Basket?
SGPE provides oilfield fishing tools and drilling equipment for demanding wellsite operations. Our Reverse Circulation Junk Basket combines reverse circulation, reliable junk capture, optional magnetic recovery, and a wide model range.
SGPE advantages include:
- Wide RCJB model range for different oilfield hole sizes
- Multiple standard oilfield box connections
- Optional magnet insert for ferrous debris recovery
- Rugged structure for drilling and workover environments
- Practical design for field crews
- Reliable performance in wellbore cleanout and fishing operations
- Technical support for tool selection and special requirements
SGPE works with oilfield service companies, drilling contractors, and workover teams to improve operating efficiency, reduce downtime, and complete wellbore cleanout work with greater confidence.
Request a Quote
Need a Reverse Circulation Junk Basket for an oilfield drilling, workover, milling, or wellbore cleanout project?
Send SGPE your working conditions, and our team will recommend a suitable RCJB model according to your wellbore condition, junk type, and fishing string connection.
Please include:
- Oil or gas well hole size
- Fishing string connection
- Target junk type and estimated size
- Well depth and operation type
- Standard RCJB or magnet insert configuration
- Required quantity
- Delivery destination
- Special connection or material requirements
SGPE will provide model selection support, technical information, and a quotation based on your oilfield application.
E-Mail:
info@sgpe.com
Frequently Asked Questions About Reverse Circulation Junk Basket
1. What does a Reverse Circulation Junk Basket do in oilfield operations?
A Reverse Circulation Junk Basket removes small junk, metal debris, broken tool parts, bit fragments, and loose objects from oil and gas wells. Oilfield crews use this RCJB fishing tool for wellbore cleanout, bottom-hole junk collection, and downhole debris recovery before drilling, workover, milling, or completion operations continue.
The tool uses reverse fluid circulation to sweep debris from the bottom of the hole and carry it into the basket barrel. This design reduces drilling risks, protects downhole tools, and helps crews avoid costly delays caused by junk left in the wellbore.
2. How does an RCJB fishing tool work in an oil or gas well?
The crew connects the RCJB to the bottom of the fishing string and lowers it near the bottom of the well. First, the crew starts circulation to wash the hole and loosen debris. Then the operator stops circulation and drops the steel ball into the valve seat.
Once the ball lands, the tool activates reverse circulation. Fluid flows through the inner passage, exits through the lower vents, sweeps the hole bottom, and carries debris upward into the basket. The junk catcher keeps recovered objects inside the tool until the crew pulls it out of the well.
3. What types of junk can the Reverse Circulation Junk Basket recover?
The SGPE Reverse Circulation Junk Basket can recover many types of small downhole debris, including steel chips, bit pieces, cutters, slips, bearing pieces, cement fragments, broken hand tools, and loose metal parts. It works well after drilling, milling, cutting, sidetracking, or workover operations.
When the well contains ferrous debris, SGPE can add a magnet insert. This option collects magnetic junk such as steel fragments, milling chips, and broken tool parts while the reverse circulation flow carries other loose debris into the barrel.
4. What is the difference between a reverse circulation junk basket and a regular junk basket?
A regular junk basket mainly relies on mechanical contact to collect debris. A reverse circulation junk basket uses fluid movement to guide junk into the tool body. This difference allows the RCJB to recover small debris that may stay loose at the bottom of the well.
The reverse circulation flow sweeps the bottom of the oil or gas well, moves debris toward the center of the tool, and carries junk into the barrel. Operators often choose an RCJB for bottom-hole cleanout, post-milling debris recovery, and fishing jobs that involve small loose objects.
5. When should oilfield crews use a Reverse Circulation Junk Basket?
Crews should consider an RCJB when small junk, metal debris, or loose fragments remain in the wellbore. The tool suits oil and gas drilling cleanout, workover debris removal, post-milling cleanout, cutting debris recovery, sidetracking preparation, and wellbore cleanup before completion.
Operators also use this tool after downhole tool failure. When small parts fall to the bottom of the hole, the RCJB can recover them before they damage bits, block tools, restrict circulation, or interfere with the next operation.
6. Can the RCJB work as a magnetic junk basket?
Yes. SGPE can equip the Reverse Circulation Junk Basket with a magnet insert. This configuration turns the tool into a magnetic junk basket while it keeps the reverse circulation function.
The magnet insert attracts ferrous debris such as steel chips, bit fragments, slips, cutters, bearing pieces, and broken tool parts. At the same time, the reverse fluid path carries loose non-magnetic debris into the basket barrel. This option works especially well after milling, cutting, or tool failure in oil and gas wells.
7. Why does the RCJB use reverse circulation?
The RCJB uses reverse circulation to move debris into the barrel instead of pushing it away from the tool. Fluid exits near the lower end, sweeps the hole bottom, redirects toward the center, and carries junk upward through the return holes.
This flow path improves junk recovery during oilfield wellbore cleanout. It also gives crews better control when they need to remove small debris from the bottom of the hole before drilling ahead, running completion tools, or continuing workover operations.
8. How does the reverse drainage design reduce wet string risk?
The reverse drainage design reduces fluid retention when crews pull the fishing string. This feature keeps the operation cleaner and allows crews to handle the tool more efficiently on the rig floor.
In fishing operations, pulling a wet string can create extra handling work, safety concerns, and downtime. The SGPE RCJB reduces this problem through its reverse drainage structure while maintaining effective reverse circulation for junk recovery.
9. How do I choose the right Reverse Circulation Junk Basket model?
Buyers should choose the RCJB model according to hole size, barrel OD, maximum fishing size, steel ball size, fishing string connection, junk type, and well condition. These details help match the tool to the actual oilfield operation.
For example, larger hole sizes need larger barrel ODs. Wells with mainly steel debris may need a magnet insert. Wells after milling or cutting may require stronger debris recovery performance. SGPE can recommend a suitable model based on your hole size, connection type, and fishing program.
10. What connections does SGPE offer for RCJB tools?
SGPE offers common oilfield box connections for Reverse Circulation Junk Basket models, including NC26, NC31, NC38, NC50, 2 3/8 REG, 2 7/8 REG, 3 1/2 REG, 4 1/2 REG, and 6 5/8 REG. The available connection depends on the selected model and tool size.
Choosing the correct connection helps the RCJB match the fishing string safely and efficiently. Before ordering, customers should confirm the connection type, hole size, and fishing assembly requirements.
11. Is the RCJB suitable for post-milling cleanout and workover wells?
Yes. The RCJB works well for post-milling cleanout, workover debris removal, and well servicing operations. Milling and cutting jobs often leave steel chips, hard fragments, and loose debris at the bottom of the well. The RCJB collects these materials before the next run.
In workover wells, debris may come from tubing, casing, plugs, valves, packers, bridge plugs, or old completion equipment. The tool cleans the wellbore and reduces the risk of stuck tools, blocked circulation, or equipment damage.
12. What information should I provide when requesting a quotation?
To help SGPE recommend the right Reverse Circulation Junk Basket, please provide your hole size, fishing string connection, target junk type, estimated junk size, well depth, operation type, and required quantity. Also mention whether you need a standard RCJB or a model with a magnet insert.
If you have special requirements, such as a specific connection, material request, or delivery schedule, include them in your inquiry. SGPE will review your oilfield application and recommend a suitable RCJB model for your drilling, workover, milling, or wellbore cleanout project.
E-Mail:
info@sgpe.com
