Shanghai Tianhe Oil Engineering Co., Ltd.

China Manufacturer with main products: Drill Pipe, Drill Collar, Integral Blade Stabilizer, Drilling Jar, Kelly Valve, Kellys, Overshots, Releasing Spear

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Double Acting Hydraulic-Mechanical Drilling Jar

FOB Price: 3,000.00 - 3,500.00 USD/Piece
Supply Ability: 100 Piece/Pieces per Month
Shipping: 35 Days
Payment Terms: L/C, T/T
In Stock

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Export Markets: North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, Mid East, Eastern Asia, Western Europe
Place of Origin: Shanghai in China
Packaging Details: Metal Detail

Quick Details

  • Condition: New
  • Brand Name: Tianhe
  • After-sales Service Provided: Overseas service center available


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.


 Down jarring

Move up and down the drill string to make drilling jar closed completely (in locking position), lowering drill string to make spring compressed and stored energy. When pressure of jar is larger than the desired lower unlocking force, grapple will slide out from mandrel to release the locking and make down jarring. Repeating the above  several times can force tool to produce continues down jarring.

Service Process

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  • Deposit Service Commitments

    In order to improve the quality of service, ECVV will charge for a 100CNY deposit for the agent purchasing order, and the deposit will be part of subsequent purchasing costs.

    After paying a deposit, if the purchasing order is not completed because of unsatisfied ECVV services, ECVV will refund your deposit.

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