Description
DJ Surface Bumper Jar
Surface Down Jarring Tool for Stuck Pipe Recovery, Fishing, Drilling, and Workover Operations
The DJ Surface Bumper Jar from SGPE helps drilling crews apply strong downward jarring force from the surface section of the drill string. Operators use this tool when stuck pipe, stuck drilling tools, fishing tools, or downhole assemblies need repeated impact from above.
This surface bumper jar gives rig crews better control during difficult wellsite recovery jobs. It combines adjustable releasing force, continuous down jarring performance, strong torque resistance, and reliable sealing for mud circulation. These features help crews save rig time, respond faster, and handle stuck-tool problems more efficiently in oil and gas well operations.
SGPE supplies three main models: DJ46B 4 3/4″, DJ70B 7″, and DJ70C 7″. Each model supports different outer diameter, connection, stroke length, weight, and jarring force requirements.
Need help selecting the right model? Send SGPE your drill string connection, required jarring force, stroke requirement, well condition, application, quantity, and delivery destination. Our team will help confirm the suitable DJ Surface Bumper Jar before quotation.
Product Overview of DJ Surface Bumper Jar
| Item | Details |
|---|---|
| Product Name | DJ Surface Bumper Jar |
| Product Type | Surface-controlled down jarring tool |
| Main Use | Stuck pipe recovery, stuck drilling tool release, fishing, drilling, workover, and well intervention |
| Available Models | DJ46B, DJ70B, DJ70C |
| Connections | NC38, NC50 |
| Max. Jarring Force | 0.4 MN to 0.68 MN |
| Sealing Pressure | 30 MPa |
| Operation Feature | Adjustable releasing force and continuous down jarring |
| Supplier | SGPE |
What Is a DJ Surface Bumper Jar?
A DJ Surface Bumper Jar is a surface-controlled oilfield jarring tool that creates strong downward impact through the drill string. It helps crews release stuck pipe, stuck drilling tools, fishing tools, and downhole assemblies during oil and gas well operations.
Operators usually install the tool in the surface section of the drill string. This position gives the crew clearer visibility and better control during the jarring process. It also makes releasing force adjustment more convenient compared with many downhole jarring tools.
In drilling, fishing, workover, and well intervention operations, crews often use the surface bumper jar when they need downward impact from the surface, adjustable releasing force, and repeated down jarring action. The tool also supports drilling fluid circulation under high pump pressure and performs well under heavy-load or high-torque drill string conditions.
Key Features of SGPE DJ Surface Bumper Jar
1. Strong Downward Jarring Impact
The DJ Surface Bumper Jar generates powerful downward impact through the drill string. This impact helps move stuck pipe, stuck drilling tools, fishing tools, and downhole assemblies during recovery operations.
Because the crew operates the jar from the surface section, they can watch the jarring action more clearly and adjust the operation when wellsite conditions change.
2. Adjustable Releasing Force
Operators can adjust the releasing force through the device above the rotary disc. This structure helps crews match the jarring force with the actual well condition, stuck point, drill string size, and tool requirement.
The adjustable design gives the surface bumper jar more flexibility in drilling, fishing, workover, and oilfield recovery applications.
3. Continuous Down Jarring Performance
Difficult stuck-tool recovery often needs repeated impact. The DJ Surface Bumper Jar supports continuous down jarring, so crews can apply downward force again and again without a complicated operating process.
This feature helps reduce non-productive time and improves rig-site efficiency during stuck pipe recovery, fishing tool recovery, and downhole assembly release operations.
4. Heavy-Duty Load Capacity
SGPE builds the tool body for demanding oilfield use. The jar handles strong tension load requirements and helps maintain stable performance during drilling, fishing, workover, and well intervention operations.
This makes it suitable for harsh wellsite environments where the drill string may face heavy load, strong torque, and changing downhole conditions.
5. Strong Torque Resistance
Oilfield jarring operations often involve high torque, drill string movement, and complex wellbore conditions. The DJ Surface Bumper Jar provides strong torque resistance and helps crews keep better control during surface jarring.
6. Reliable Sealing for Mud Circulation
The sealing structure supports drilling fluid circulation under high pump pressure. The sealing pressure reaches 30 MPa, which helps the tool perform steadily during mud circulation in oil and gas well operations.
7. Simple Rig-Site Operation
The tool uses a practical structure that helps crews operate it quickly at the wellsite. Operators can connect it to the surface section of the drill string, adjust the releasing force, and start down jarring according to the job plan.
Oilfield Applications of Surface Down Jarring Tool
The SGPE DJ Surface Bumper Jar supports a wide range of oil and gas field operations where crews need reliable downward jarring force from the surface. Operators commonly use it for stuck pipe recovery, stuck drilling tool release, fishing tool recovery, and downhole assembly releasing jobs.
During oil well drilling operations, the tool helps crews apply controlled impact when downhole tools become stuck or difficult to move. In fishing, workover, and well intervention jobs, it provides repeated down jarring action to support tool recovery and improve rig-site efficiency.
The DJ Surface Bumper Jar also works well in drilling jobs that require mud circulation and high pump pressure. With surface-controlled operation, adjustable releasing force, and reliable sealing performance, it serves drilling contractors, oilfield service companies, fishing tool suppliers, workover teams, and well intervention crews that need dependable surface jarring equipment for demanding wellsite conditions.
Advantages of DJ Surface Bumper Jar from SGPE
The DJ Surface Bumper Jar from SGPE helps operators apply strong downward impact while keeping the operation easy to control. It provides a practical solution for stuck-tool recovery and helps reduce downtime during critical oilfield jobs.
With strong down jarring force, this tool helps crews release stuck pipe, stuck drilling tools, fishing tools, and downhole assemblies more efficiently. Its adjustable releasing force allows operators to match the jarring impact with different well conditions, stuck-point situations, and drill string requirements.
The DJ Surface Bumper Jar also supports continuous down jarring, so crews can apply repeated impact during difficult recovery operations. Because operators control the tool from the surface section of the drill string, they can observe the jarring action more clearly and adjust the operation when needed.
In addition, the tool offers strong load capacity, high torque resistance, and reliable sealing performance under high pump pressure. It works with drilling fluid circulation and supports drilling, fishing, workover, and well intervention operations in demanding oilfield environments.
SGPE supplies multiple model options with NC38 and NC50 connections, helping customers choose a suitable surface bumper jar for different drill string sizes and operation requirements.
Working Principle of DJ Surface Bumper Jar
The DJ Surface Bumper Jar stores mechanical energy through the drill string. When the tool reaches the set releasing condition, it releases that energy as a strong downward impact.
The impact travels through the drill string and acts on the stuck pipe, drilling tool, fishing tool, or downhole assembly. After one jarring action, the crew can repeat the process until the stuck tool moves or releases.
This working principle gives operators a simple and reliable way to apply downward impact from the surface during oilfield recovery operations.
Specifications – DJ Surface Bumper Jar
Compare DJ46B, DJ70B, and DJ70C Surface Bumper Jars by outer diameter, jarring force, tension load, sealing pressure, stroke, connection, closed length, and weight.
| Parameter / Model | DJ46B 4 3/4″ | DJ70B 7″ | DJ70C 7″ |
|---|---|---|---|
| O.D. | 121 mm / 4 3/4″ | 178 mm / 7″ | 178 mm / 7″ |
| Max. Jarring Force | 0.4 MN / 41 ± 5 tf | 0.68 MN / 70 ± 5 tf | 0.68 MN / 70 ± 5 tf |
| Max. Tension Load | 1.2 MN / 122 tf | 1.5 MN / 153 tf | 1.5 MN / 153 tf |
| Sealing Pressure | 30 MPa / 294 kgf/cm² | 30 MPa / 294 kgf/cm² | 30 MPa / 294 kgf/cm² |
| Stroke | 1500 mm / ≈59″ | 1220 mm / ≈48″ | 1800 mm / ≈70.87″ |
| I.D. | 30 mm / 1 3/16″ | 47 mm / 1 7/8″ | 47 mm / 1 7/8″ |
| Connection | NC38 | NC50 | NC50 |
| Closed Length | 3095 mm / 121.85″ | 3090 mm / 121.8″ | 3670 mm / 144.5″ |
| Initial Releasing Force | 15 tf | 20 tf | 20 tf |
| Weight | 170 kg | 450 kg | 500 kg |
Need to confirm the right model? Send SGPE your required O.D., connection, stroke length, jarring force, and application. Our team will help verify the suitable DJ Surface Bumper Jar before quotation.
Model Selection Guide of Surface Down Jarring Tool
DJ46B 4 3/4″ Surface Bumper Jar
The DJ46B Surface Bumper Jar fits operations that require a compact tool with NC38 connection. It has a 121 mm outer diameter, 1500 mm stroke, and 170 kg weight.
Choose DJ46B when your drilling or fishing job needs a smaller surface jarring tool with reliable downward impact.
DJ70B 7″ Surface Bumper Jar
The DJ70B Surface Bumper Jar offers a larger body size, NC50 connection, and stronger jarring capacity. It has a 178 mm outer diameter, 1220 mm stroke, and 450 kg weight.
Choose DJ70B for larger drill string applications that need strong surface-controlled down jarring performance.
DJ70C 7″ Surface Bumper Jar
The DJ70C Surface Bumper Jar has the same maximum jarring force as DJ70B, but it provides a longer 1800 mm stroke. It also uses NC50 connection and weighs 500 kg.
Choose DJ70C when your operation needs longer jarring travel and stronger impact control.
How to Choose the Right DJ Surface Bumper Jar
A suitable DJ Surface Bumper Jar depends on the well condition, tool size, drill string connection, and stuck-tool recovery plan. Before placing an order, customers should confirm the required outer diameter, connection type, downward jarring force, and stroke length according to the actual drilling or fishing operation.
Operators should also consider the well depth, stuck-point condition, fishing tool size, downhole assembly size, mud circulation requirement, and pump pressure level. In addition, the rig operation plan, order quantity, and delivery destination can also affect model selection and quotation details.
If you are not sure which model fits your job, send your operation details to SGPE. Our team will review your requirements and recommend a suitable DJ Surface Bumper Jar for your oilfield drilling, fishing, workover, or stuck-pipe recovery operation.
Quality Control and Testing
SGPE focuses on stable performance and reliable shipment quality. Before delivery, our inspection team checks the key dimensions, thread connections, sealing performance, assembly condition, appearance, technical data, and packing details of each surface bumper jar.
During inspection, SGPE verifies whether the tool dimensions meet the required specifications and whether the thread connections match the customer’s drill string requirements. Our team also checks the connection condition, sealing performance, assembly quality, and external appearance to help ensure the tool is ready for demanding oilfield use.
Before shipment, SGPE reviews the technical data and inspects the packing condition to reduce delivery risks. These checks help customers receive tools that are ready for demanding drilling, fishing, workover, and stuck-pipe recovery jobs.
Why Choose SGPE?
SGPE supplies oilfield drilling tools, fishing tools, workover tools, and well intervention equipment for global oil and gas customers. We support drilling contractors, oilfield service companies, and equipment distributors with practical tools for real wellsite conditions.
For the DJ Surface Bumper Jar, SGPE offers DJ46B, DJ70B, and DJ70C model options with NC38 and NC50 connection choices. Before quotation, our team can help confirm the suitable model according to your well condition, drill string connection, required jarring force, stroke requirement, and stuck-tool recovery plan.
Before production and shipment, SGPE reviews the technical data, checks key dimensions, verifies thread and connection details, and inspects the assembly quality and packing condition. These steps help customers receive reliable surface bumper jars for drilling, fishing, workover, and stuck-pipe recovery operations.
With fast technical response, model selection support, and practical oilfield experience, SGPE helps customers choose the right surface bumper jar for demanding oil and gas well operations.
Related Oilfield Tools
In addition to the DJ Surface Bumper Jar, SGPE supplies a wide range of related oilfield tools for drilling, fishing, workover, well intervention, and stuck-pipe recovery operations. These tools help drilling crews handle impact control, vibration reduction, downhole sticking problems, tool recovery, and other demanding wellsite challenges.
For drilling and jarring applications, SGPE provides drilling jars, hydraulic jars, mechanical jars, and shock subs. These tools help crews manage downhole impact, reduce drill string vibration, and improve performance in harsh oil and gas well conditions.
For fishing, workover, and recovery operations, SGPE offers fishing tools, drill stem tools, workover tools, and well intervention tools. These products support stuck tool recovery, downhole assembly handling, well service operations, and rig-site maintenance work.
By combining surface jarring equipment with related drilling and fishing tools, operators can improve stuck-pipe recovery efficiency, reduce rig downtime, and complete oilfield drilling, workover, and well intervention jobs more smoothly.
Frequently Asked Questions About DJ Surface Bumper Jar
1. What is a DJ Surface Bumper Jar?
A DJ Surface Bumper Jar is an oilfield surface jarring tool that creates strong downward impact through the drill string. Operators use it when they need surface-controlled jarring force for stuck pipe, stuck drilling tools, fishing tools, or downhole assemblies.
Because crews install it in the surface section of the drill string, they can control the jarring process more easily at the rig site.
2. What does a DJ Surface Bumper Jar do in oilfield operations?
The tool provides downward jarring force when a pipe, drilling tool, fishing tool, or downhole assembly becomes stuck in the wellbore.
In stuck pipe recovery and oilfield fishing jobs, crews often need repeated impact from the surface. The DJ Surface Bumper Jar helps them apply that impact with better control and less downtime.
3. Where do crews install the surface bumper jar?
Crews usually install the surface bumper jar in the surface section of the drill string. This position helps operators watch the jarring action and adjust the releasing force more conveniently.
This surface-controlled arrangement makes the tool practical for rig-site stuck-tool recovery applications.
4. How does the DJ Surface Bumper Jar work?
The DJ Surface Bumper Jar stores energy through the drill string and releases it as a strong downward impact. This impact travels through the drill string and acts on the stuck tool or stuck pipe.
If one impact does not release the tool, the crew can repeat the process. This continuous down jarring capability helps operators handle difficult recovery jobs.
5. Can operators adjust the jarring force?
Yes. Operators can adjust the releasing force through the adjustment device above the rotary disc.
This feature helps crews match the force with the well condition, stuck-point situation, drill string size, and fishing tool requirement. It also makes the jar useful for different rig-site recovery operations.
6. Does the DJ Surface Bumper Jar support continuous down jarring?
Yes. SGPE builds the DJ Surface Bumper Jar for continuous down jarring. Crews can apply repeated downward impact when one impact does not release the stuck tool.
This function works well for stuck pipe recovery, fishing tool recovery, and downhole assembly releasing operations.
7. What models does SGPE supply?
SGPE supplies DJ46B 4 3/4″, DJ70B 7″, and DJ70C 7″ Surface Bumper Jars.
DJ46B uses NC38 connection. DJ70B and DJ70C use NC50 connection. These three models give customers different choices for tool size, stroke length, weight, and jarring performance.
8. What is the difference between DJ46B, DJ70B, and DJ70C?
The main differences include outer diameter, connection type, stroke length, closed length, weight, and jarring application.
Choose DJ46B for compact 4 3/4″ applications with NC38 connection. Choose DJ70B for 7″ applications that need NC50 connection and strong jarring capacity. Choose DJ70C when the operation needs a 7″ tool with longer stroke and greater jarring travel.
9. Can the tool work with mud circulation?
Yes. The DJ Surface Bumper Jar supports drilling fluid circulation under high pump pressure. Its sealing pressure reaches 30 MPa.
This sealing performance helps the tool work steadily during drilling, workover, and fishing operations where mud circulation plays an important role.
10. What connections are available?
SGPE supplies NC38 and NC50 connections for the DJ Surface Bumper Jar series.
The DJ46B model uses NC38 connection. The DJ70B and DJ70C models use NC50 connection. Before ordering, customers can share their drill string connection requirement with SGPE for confirmation.
11. How should I choose the right DJ Surface Bumper Jar model?
Start with your drill string size, connection type, required jarring force, stroke requirement, well condition, and stuck-tool recovery plan.
For smaller applications, DJ46B may fit better. For larger drill strings, DJ70B or DJ70C may provide better performance. If your job needs longer jarring travel, DJ70C usually offers a better option than DJ70B.
For faster selection, send SGPE your required O.D., connection, well condition, application, quantity, and delivery destination.
12. Why choose SGPE as your DJ Surface Bumper Jar supplier?
SGPE supplies practical oilfield tools for drilling, fishing, workover, and well intervention operations. Our team supports customers with model selection, technical confirmation, quality inspection, and fast quotation service.
We can help you choose a suitable DJ Surface Bumper Jar based on your well condition, connection type, jarring force requirement, stroke requirement, and recovery plan.
Request a Quote for DJ Surface Bumper Jar
Looking for a reliable DJ Surface Bumper Jar manufacturer and supplier for stuck pipe recovery, oilfield fishing, drilling, workover, or well intervention operations?
Send SGPE your required model, connection type, jarring force, stroke length, application, quantity, and delivery destination. Our team will review your requirements and provide technical support, model confirmation, and quotation details.
Contact SGPE today to get a fast quotation for your DJ Surface Bumper Jar.
E-Mail:
info@sgpe.com
