8 Belgium 
5 UK 
2 Hong Kong 
2 China 
1 New Zealand 
1 Brazil 
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:
- Posted By: Tianhe Oil
- Phone: 00862131150073
- Address: No.2999 Xinyang Road,Fengxian District, Shanghai , China
- Email:
- Website: http://www.tianheoil.com
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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