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Product Double Acting Hydraulic Mechanical Drilling Jar - China

price: contact company for price

The drilling jar is consists of drilling up jar and drilling

down jar in one body, which has stable working performance and

strong jarring force both up and down. When in down hole, it

can release the struck; it is a desire tool for directional

well and deep well

Working principle

Up jarring

Lowering drill string to make drilling jar closed completely

(in locking position), elevating drill string by the order of

small tonnage to larger tonnage, which make spring and

hydraulic cylinder delay, when mandrel move to a position and

become release resistance, the spring force stored in drill

string will transfer to upforward energy and up jarring.

Repeating the above several times can force tool to produce

continues up jarring


Company Contact:


  • Phone: 00862131150073

  • Address: No.2999 Xinyang Road,Fengxian District, Shanghai, China

  • Email: Email


Published date: January 9, 2014 -

  • Business Description: Tianhe Oil Group is a comprehensive enterprise of equipment

    manufacturing and oilfield service providing. The company is specialized

    in innovation, manufacture and sales of drill and petroleum extraction

    tools, equipments and oil field services.

    Tianhe Oil Group is the council member of CPEIA (China Petroleum and Equipment Industry Association), rewarded as national level of Hi Tech enterprise. The company is a Chinese well known trademark enterprise. It has been certified to ISO, API, NS 1, and HSE management system.

    The company has developed a strong domestic sales network covering all oilfields of CNPC, SINOPEC and CNOOC. Currently, our products and equipments have been exported to 45 countries, overseas business has covered 80% of our company sales.

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