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Kxj Fishing Bumper Sub - China

price: contact company for price

KXJ type bumper jar (hereinafter called as bumper jar )is a mechanical

jarring tool . It can make jar repeatedly the stuck drill stem to free

from stuck point. When stuck drill stem can not be released by lifting

and jarring, the bumper jar can be rotated to make releasable fishing

tool to release fish. When used with mechanical internal cutter, it can

provide an expected feeding force to the internal cutter so as to

cutting steadily. When used with reversing unit , it can compensate the

rising stroke for threads after reversing.

Working mechanism

- Energy conversion in jarring operation

Jarring downward is made by means of energy conversion. Raising 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 force the drill stem to move downward in acceleration.When bumper jar reach a closed position, the above two energies at this instant change into large downward jarring force.

- Main factors having influence on jarring force

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

The longer the spring extension of drill stem is when raising drill stem, the bigger the jarring force is;

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

Company Contact:

  • Phone: +

  • 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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