API Downhole Oil Drilling Tool Drilling Jar for Oilfield Fishing Jarring

• Customized: Customized
• Certification: CE, ISO, API
• Direction: Under Drilling Jar
• Structure: Lubricated Bumper Sub
• Transport Package: Wood Case or Stantdard Sea Packing
• Specification: O. D. 80-203MM
• Trademark: Tianhe
• Origin: China
• HS Code: 8431431000
• Production Capacity: 5000000PCS

Product Description

Lubricated fishing bumper sub uses the gravitational force of a downward moving heavy weight object to create the jarring force. It is engineered to withstand strong, sustained jarring force in harsh downhole applications, severe fishing operations and deep workover operations. This bumper sub is suitable for both middle and deep downhole operation. It has an inner chamber filled with hydraulic oil to help lengthen its service life.

Lubricated fishing bumper sub is a widely used jarring tool because it is easy      to operate and it assists in multiple applications. This bumper sub can provide necessary impact force in either the upward or downward direction during jarring operations. It can provide strong, continuous downward jarring force and medium, continuous upward jarring force. In addition, it can be used to engage and disengage releasable fishing tools. On top of that, this bumper sub may also act as a constant pressure drill tool.



Working Principle

• Energy conversion in jarring operation

Downward jarring forced is achieved through the conversion of stored energy     to kinetic energy. When lift load is applied to the drill stem, the bumper jar is pulled open to a certain height creating a potential energy. As higher lift load is applied, the drill stem begins to accumulate stored strain energy due to the spring extension. Sudden release of the lift load will convert the stored strain energy     in the drill stem to a downward acceleration force. As the drill stem accelerate downwards, the bumper jar is released towards its closed position, releasing its potential energy. At this instant, both released energies combine, creating a large downward jarring force.
 

• Main factors that influence the jarring force

Hanging weight on top of drill stem with the bumper jar. Higher hanging weight will create higher jarring force.

Length of spring extension of the drill jar. Longer length of spring extension during lifting will provide a greater jarring force.

Stroke length of the bumper jar. Longer stroke length will provide a bigger jarring force.

Specifications - BXJ Lubricated Fishing Bumper Sub

Parameter / Model	BXJ31B	BXJ34B	BXJ36B	BXJ42B	BXJ44B	BXJ46B	BXJ62B	BXJ64B	BXJ70B	BXJ80B
Product Code	1101000	1102000	1103000	1105000	1106000	1108000	1110000	1111000	1113000	1115000
O.D. (mm)	80	89	95	108	114	121	159	165	178	203
I.D. (mm)	25.4	25.4	28	32	38	38	57	57	70	76.2
Sealing Pressure (MPa)	30	30	30	30	30	30	30	30	30	30
Max.Tensile load (tf)	30	40	50	70	80	90	143	143	153	220
Work Stroke (mm)	394	394	394	394	394	400	460	460	465	465
Connection	2 3/8 REG	NC26	NC26	NC31	NC31	NC38	NC50	NC50	NC50	6 5/8 REG
Closed Length (mm)	2355	2400	2514	2450	2450	2446	2730	2730	2950	3108

 

Detailed Photos

Certifications

Packaging & Shipping

 

Company Profile

Our Advantages

Tianhe principle is to offer high quality products at competitive price to benefit our customers and the industry in the long run.
We are the Leading manufacturer in China since 1973 for drilling /fishing /milling equipment for oil and gas.
We have established a complete quality control system, all products& equipments manufactured as per international standard and API standard.
Competitive Advantages
1. We offer high quality products at competitive price.
2. Shortest delivery time & Flexible payment terms.
3. Full range of drilling /fishing /milling equipment for oil and gas.
4. Timely after-sale service.
5. Imported International brands Machines such as Japan Mazak machining center, Austria WFL machining center etc
6. Complete quality control system, offices and testing equipment.
 

 

FAQ

Dear  customer,

Thanks for your time of visiting us on made in china, if you have any further questions and needs, please kindly inform us by inquiry online or contact us by below information.

We look forward to your kind reply, thanks very much.

Ms. Dongyan
Sales Manager

Tianhe Oil Group Huifeng Petroleum Equipment Co., Ltd.