Description
Releasing and Reversing Overshot
Type DLT-T Downhole Fishing Tool for Well Servicing, Workover and Stuck Fish Recovery
The SGPE Releasing and Reversing Overshot, also known as the Type DLT-T Releasable Reversing Overshot, is a downhole fishing tool for oil and gas well servicing, workover operations, stuck fish recovery and reversing jobs. Field crews use it to catch downhole targets, apply reverse torque, loosen stuck connections, release safely when needed, and circulate washing fluid during cleaning operations.
Unlike a standard overshot that mainly catches and pulls, the DLT-T Overshot gives operators more control in difficult fishing jobs. It combines catching, reversing, releasing and circulation in one fishing assembly. This design helps crews handle stuck tubing, drill pipe, couplings, tool joints and other cylindrical downhole objects in oilfield wells.
SGPE supplies this overshot in different outside diameters, catch ranges, pull ratings and connection options. LH and RH connections are available. Custom configurations can match the target OD, wellbore condition, fishing string connection and workover requirements.
Product Overview
Downhole fishing becomes more complex when the target remains stuck, the threaded connection will not break free, or sand and debris cover the fish top. In these conditions, operators need more than a simple catching tool. They need an overshot that can grip, reverse, release and circulate.
The Type DLT-T Releasing and Reversing Overshot gives the crew that flexibility. Its internal slip grips the target OD. The bowl and control key structure transfer torque for reversing operations. The release mechanism allows the operator to disengage downhole when recovery becomes unsafe.
Once the tool catches the target, the operator can pull, jar, circulate fluid or apply reverse torque according to the workover plan. When the stuck section cannot come out safely, the crew can release the tool and recover the fishing string.
Key Advantages
Secure Grip on Downhole Targets
The internal slip grips the outside diameter of the target. When the operator pulls upward, the tapered bowl pushes the slip tighter around it. This structure creates reliable holding force for tubing, drill pipe, couplings, tool joints and other cylindrical objects.
Reversing Function for Stuck Connections
The bowl and control keys transfer torque to the stuck section. During stuck fish recovery, the operator can apply reverse torque to loosen threaded connections and recover the released part from the wellbore.
Downhole Release for Safer Workover Jobs
If the target cannot move, or if the job plan changes, the operator can release the overshot downhole. This function protects the fishing string and reduces the risk of secondary sticking.
Fluid Circulation for Washing and Cleaning
The DLT-T Overshot allows washing fluid circulation during fishing operations. Circulation cleans the fish top, removes sand, washes debris and improves downhole conditions before recovery.
Stable Torque Transmission
Three keys fit into three grooves in the tapered lower bowl. This structure transfers torque smoothly during reversing operations and gives the operator better control when handling stuck tubulars in oil and gas wells.
Wide Model and Connection Range
SGPE offers different OD sizes, catch ranges, pulling capacities and torque ratings. Common connections include NC26, NC31, NC38, NC50 and 2 7/8 REG. LH and RH options help match different fishing strings and field requirements.
Main Components
The Type DLT-T Releasing and Reversing Overshot mainly consists of:
- Top sub
- Spring
- Bowl
- Retaining seat
- Slip
- Control key
- Seal ring
- Seal seat
- Guide
The top sub connects the overshot to drill tools or other fishing tools. The bowl houses the internal working parts and provides the tapered surface for gripping. The slip catches the target OD, while the control keys manage positioning and torque transmission.
The retaining seat can slide axially and rotate around the centerline together with the slip. This structure keeps the slip aligned with the bowl and supports smooth release when the operator needs to disengage downhole.
How the Releasing and Reversing Overshot Works
The operator runs the DLT-T Overshot into the well and guides the target into the tool through the guide. Once the target enters the bowl, the slip contacts its outside diameter.
When the operator pulls upward, the tapered bowl forces the slip to grip firmly. After engagement, the crew can pull, jar, circulate fluid or apply torque based on the fishing program.
If the target remains stuck, the tool transfers reverse torque to the connection. This action loosens the stuck section and supports recovery. After the connection breaks free, the operator can recover the target to the surface.
When recovery becomes unsafe, the operator can activate the release procedure. The overshot disengages from the target, and the fishing string can return to the surface.
Applications in Oilfield Operations
The SGPE Releasing and Reversing Overshot suits a wide range of oilfield fishing and workover jobs, including:
- Oil and gas well servicing
- Oilfield workover fishing operations
- Downhole fish recovery
- Stuck tubing recovery
- Drill pipe fishing
- Coupling and tool joint recovery
- Stuck pipe recovery in well intervention jobs
- Reversing and unscrewing operations
- Fishing jobs that require fluid circulation
- Washing and cleaning around the fish top
- Recovery of cylindrical downhole objects
- Complex fishing jobs that require downhole release
Oilfield service companies, workover contractors, drilling contractors and well intervention teams use this tool in oil and gas wells where catching, torque transmission, release and circulation matter in one operation.
Technical Specifications
DLT-T Releasing and Reversing Overshot — LH Connection
| Model | O.D. mm | Max. Fishing Size mm | Allowed Pull kN | Releasing Pull kN | Allowed Torque N·m | Connection Box LH |
|---|---|---|---|---|---|---|
| DLT-T95×48 | 95 | 48.3 | 250 | 120 | 3100 | 2 7/8 REG |
| DLT-T105×60 | 105 | 63.5 | 350 | 150 | 5750 | NC31 |
| DLT-T114×73 | 114 | 78.6 | 420 | 180 | 7750 | NC31 |
| DLT-T134×89 | 134 | 93.2 | 500 | 180 | 10250 | NC38 |
| DLT-T145×102 | 145 | 101.6 | 700 | 200 | 11050 | NC38 |
| DLT-T160×114 | 160 | 114.3 | 900 | 200 | 12150 | NC38 / 2 7/8 REG |
| DLT-T185×127 | 185 | 127 | 1200 | 240 | 13500 | NC50 |
| DLT-T200×140 | 200 | 139.7 | 1500 | 240 | 15300 | NC50 |
DLT-T Releasing and Reversing Overshot — RH Connection
| Model | O.D. mm | Connection | Catch Size in |
|---|---|---|---|
| TFLT48 | 95 | NC26 | 1.9 |
| TFLT60 | 105 | NC31 | 2 3/8 |
| TFLT73 | 115 | NC31 | 2 7/8 |
| TFLT89 | 134 | NC38 | 3 1/2 |
| TFLT114 | 150 | NC38 | 4 1/2 |
How to Select the Right Releasing and Reversing Overshot
Start with the target outside diameter. The catch size or maximum fishing size should match the target OD closely. A correct match gives the slip enough contact area during pulling, jarring or reversing.
Next, check the wellbore size, tool OD and fishing string connection. For stuck fish jobs, review the required pulling capacity, release load and torque rating before choosing the model.
SGPE can recommend a suitable DLT-T Overshot based on:
- Target outside diameter
- Target type, such as tubing, drill pipe, coupling or tool joint
- Wellbore size
- Fishing depth
- Required connection
- LH or RH connection requirement
- Expected pulling load
- Required reversing torque
- Workover program
- Well condition
These details help SGPE match the right oilfield fishing tool to the job and reduce the risk of model mismatch in the field.
Custom Options from SGPE
SGPE supplies standard and customized Releasing and Reversing Overshots for different oilfield fishing requirements. Custom options may include:
- Custom catch size according to target OD
- LH or RH connection
- NC26, NC31, NC38, NC50, REG and other thread connections
- Customized slip and guide
- Matching accessories for fishing assemblies
- Export packing for international oilfield projects
- Technical support for tool selection and fishing string matching
For special fishing jobs, customers can send drawings, target OD, well condition, connection requirements or the workover program. SGPE will review the information and recommend a practical configuration.
Why Choose SGPE
SGPE supplies oilfield fishing tools, workover tools and downhole tools for global oil and gas projects. We focus on practical design, reliable machining quality and field-ready performance.
For the DLT-T Releasing and Reversing Overshot, SGPE pays close attention to the bowl, slip, retaining seat, control key and guide. These key parts support secure catching, torque transmission, downhole release and fluid circulation.
Customers choose SGPE because we provide:
- Professional oilfield fishing tool supply
- Multiple DLT-T Overshot models
- LH and RH connection options
- Common oilfield thread connections
- Custom catch sizes for different target OD
- Model selection support based on well condition
- Technical support for workover tool matching
- Project supply for oilfield service companies and drilling contractors
- Stable quality and export-ready packaging
SGPE helps customers select the right tool when a fishing job involves stuck tubulars, reversing requirements or downhole release risks.
Field Operation Benefits
The Releasing and Reversing Overshot gives field crews more control during difficult fishing jobs. Instead of relying only on pulling force, the operator can combine catching, reverse torque, circulation and release in one tool.
For stuck tubing or drill pipe, the reversing function can loosen the connection before recovery. For wells with sand, debris or poor fish top condition, circulation can clean the working area. If the target cannot come out safely, the release function lets the tool disengage and return to the surface.
This flexibility can reduce unnecessary trips, improve fishing efficiency and support safer workover operations in oil and gas wells.
Related Oilfield Fishing Tools
SGPE also supplies a wide range of oilfield fishing and workover tools, including:
- Releasing Overshot
- Basket Grapple Overshot
- Spiral Grapple Overshot
- Box Tap
- Taper Tap
- Fishing Spear
- Fishing Magnet
- Junk Basket
- Safety Joint
- Hydraulic Jar
- Mechanical Jar
- Casing Scraper
- Milling Tools
- Workover Fishing Tool Accessories
These tools can work with fishing assemblies for tubing recovery, drill pipe recovery, junk removal, milling and wellbore cleaning operations.
FAQ About Releasing and Reversing Overshot
1. What is a Releasing and Reversing Overshot?
A Releasing and Reversing Overshot is an oilfield fishing tool for well servicing, workover operations and downhole fish recovery. Operators use it to catch a downhole target, transmit reverse torque, loosen stuck connections, release downhole and circulate washing fluid during fishing operations.
The SGPE Type DLT-T model works well in oil and gas wells where a standard overshot does not provide enough control. It gives the crew more options when they need to handle stuck tubing, drill pipe, couplings, tool joints or other cylindrical objects in the wellbore.
2. What does the DLT-T Releasing and Reversing Overshot do during fishing operations?
The DLT-T Releasing and Reversing Overshot catches the target OD with its internal slip. After it grips the target, the operator can pull, jar, circulate fluid or apply reverse torque according to the workover plan.
In stuck fish recovery jobs, this tool allows the operator to loosen threaded connections and recover the released section. If the target cannot move safely, the operator can release the tool downhole and retrieve the fishing string.
3. How does a Releasing and Reversing Overshot work?
A Releasing and Reversing Overshot works through a slip, bowl, retaining seat and control key system. When the target enters the bowl, the slip contacts its outside diameter. As the operator pulls upward, the tapered bowl pushes the slip tighter around the target.
After the tool catches the target, the bowl and control keys transfer torque to the connection. This design allows the operator to perform pulling, reversing, unscrewing and releasing operations with one fishing assembly.
4. What is the difference between a releasing overshot and a reversing overshot?
A releasing overshot mainly catches the target and allows the operator to release from it when needed. A reversing overshot adds torque transmission, so the operator can apply reverse torque and try to loosen stuck threaded connections.
The SGPE Type DLT-T Releasing and Reversing Overshot combines both functions. It can catch, reverse, release and circulate, so it suits complex oilfield workover and stuck fish recovery jobs.
5. Can this Releasing and Reversing Overshot recover stuck tubing?
Yes. Operators can use the DLT-T model for stuck tubing recovery when the tubing OD matches the tool catch range. The slip grips the tubing OD, and the bowl provides the holding force for pulling or reversing.
For better model selection, customers should provide the tubing OD, wellbore size, fishing depth, connection type and expected pulling load. SGPE can then recommend a suitable overshot model for the job.
6. Can the DLT-T Overshot work for drill pipe fishing?
Yes. The DLT-T Overshot can work for drill pipe fishing, coupling recovery, tool joint recovery and other cylindrical target recovery jobs in oil and gas wells. The target OD must match the selected catch size.
When the target includes a threaded connection, the reversing function becomes especially useful. The operator can apply reverse torque through the tool and try to loosen the stuck section before recovery.
7. Does the Releasing and Reversing Overshot allow fluid circulation?
Yes. The tool can circulate washing fluid during oilfield fishing and reversing operations. Fluid circulation cleans the fish top, removes sand, washes debris and improves the downhole condition around the fishing point.
This feature matters in wells with heavy sand, debris accumulation, poor fish top condition or repeated failed fishing attempts. A cleaner working area can improve the chance of successful engagement and recovery.
8. When should operators use a Releasing and Reversing Overshot instead of a standard overshot?
Operators should choose a Releasing and Reversing Overshot when the job requires more than simple catching and pulling. For example, the target may remain stuck, the threaded connection may need loosening, or the crew may need a safe release option downhole.
Compared with a standard overshot, the DLT-T model gives the crew more flexibility. It supports catching, reversing, releasing and circulation, so it suits high-risk workover jobs and complex downhole fishing operations.
9. How do I choose the correct catch size for a Releasing and Reversing Overshot?
Start with the target outside diameter. Choose a catch size that closely matches the target OD, so the slip can grip securely during pulling, jarring or reversing.
You should also check the wellbore size, tool OD, connection type, pulling capacity and torque requirement. If you are unsure which model fits your job, send SGPE the target OD, target type, well condition and workover program for model recommendation.
10. Which connections are available for the DLT-T Releasing and Reversing Overshot?
SGPE can provide common oilfield thread connections, including NC26, NC31, NC38, NC50 and 2 7/8 REG. Both LH connection and RH connection options are available for different fishing strings and reversing requirements.
Choosing the correct connection helps the tool match the existing drill string or fishing assembly. Before ordering, customers should confirm the thread type, connection direction and upper tool connection.
11. Can SGPE customize the Releasing and Reversing Overshot?
Yes. SGPE can customize the Releasing and Reversing Overshot according to target size, connection type, catch range and field operation requirements. Custom options may include slip size, guide design, catch size, LH/RH connection and matching accessories.
For special fishing jobs, customers can send the drawing, target OD, wellbore size, fishing depth and operation plan. SGPE will review the information and recommend a practical tool configuration.
12. What information should I provide to get a quotation?
To get a fast quotation for a Releasing and Reversing Overshot, please provide the required model, target outside diameter, target type, connection type, LH or RH requirement, well condition, quantity and delivery destination.
A workover program, drawing or previous fishing report can also help. These details allow SGPE to recommend the right oilfield fishing tool, reduce model mismatch and support a smoother field operation.
Request a Quote
If you need a reliable Releasing and Reversing Overshot supplier, oilfield fishing tool manufacturer or downhole fishing tool for well servicing, SGPE can support your project with suitable models, custom options and technical recommendations.
Please send us the following information for a fast quotation:
- Required model or tool OD
- Target outside diameter
- Target type
- Connection type
- LH or RH connection
- Oil or gas well condition
- Required quantity
- Delivery destination
E-Mail:
info@sgpe.com
