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Bxj Lubricated Fishing Bumper Sub - China

price: contact company for price

Lubricated fishing bumper sub is one of the jars which produce jarring

force by means of the energy caused by heavy weight objects when moving

down, its inner chamber is full of hydraulic oil so as to ensure a longer

service life.The tool is suitable for deep hole and middle deep hole

operation.With some advantages:Can produce strong one way down jarring

force, maximum jarring force, continuous down jarring force. Medium

jarring force;continuous up jar, low-grade jarring force; can release

fishing tool; can act as constant pressure drill tool, simply structure,

easy operation, all these make it widely used jarring tool.

Woking principle

- Energy conversion in jarring operation

Jarring downward is made by means of conversion. Rasing drill stem shall make bumper jar to be pull down at a certain height to produce potential energy. Go on raising drill stem, the drill stem has a strain energy due to spring strain. When drill stem is lowered suddenly, the energy stored in drill stem the force the drill stem to move downward in acceleration. When bumper sub reaches a closed position, the above energies at this instant change into a large downward jarring force.

- Main factors having influenced on jarring force.

Many factors influence on jarring force.but key factors as follows:

1. The bigger hanging weight on top drill stem of bumper jar makes a bigger jarring force.

2. The longer the spring extension of drill stem is when raising drill stem.the bigger the jarring force is.

3. The longer the stroke of the bumper jar is, the bigger the jarring force of jar is.


Company Contact:


  • Phone: +86.182.216.530.83

  • Address: No.2999 ,XinYang Road,FengXian District, Shanghai, China

  • Email: Email


Published date: August 2, 2013 -

  • Business Description: Tianhe Oil Group,originally established in 1973, is a comprehensive

    enterprise of equipment manufacturing and oilfield service providing.

    We're specialized in innovating, manufacturing and sales of drill and

    petroleum extraction tools, equipments and oil field services.

    Tianhe Oil Group is a council member of CPEIA (China Petroleum and Equipment Industry Association), having been confered as a national Hi Tech company. Tianhe is a well known Chinese trademark. We've been certified in compliance with ISO, API, NS 1, and HSE management system,we have now high end machining centers like CNC turning centers from Mazak,all in one MILLTURN center from WFL Millturn Technologies GmbH&Co.KG as well as a wide range of other sophisticated tooling equipments.

    A strong domestic sales network has been established,covering all oilfields of CNPC, SINOPEC and CNOOC. Specifically today, we're exporting to 45 countries around the globe, overseas trading amount has topped over 80% of our business.

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