Product Kelly Manual Valve - Chinaprice: contact company for price
valve; it is divided into upper Kelly valve and lower Kelly
valve. The upper Kelly valve is connected between lower end
of swivel and upper end of Kelly; the lower Kelly valve is
connected between upper end of drill pipe and lower end of
Kelly or connected between lower end of Kelly saver subs.
The Kelly valve can be opened on or closed off by only
turning the special operating wrench at 90° according to
indicating direction. During drilling operation, the Kelly
valve shall be connected at upper end and lower end of
The sealing principle for Kelly valve is that the ball is
positioned and provided with proceeding stress by the lower
seat supported by spring load and a close seal between ball
and ball seat is provided. During normal drilling operation,
the hole is kept unblocked by turning the stem to be " on"
position; In case of kick or blowout, turn the operating
stem to be " off" position to close off the internal bore of
drill string, the kick or blowout accident is avoided due to
a high pressure sealing situation between ball and ball
When ordering please specify:
Upper or Lower type;
Working Pressure: 5, 000 / 10, 000 / 15, 000 PSI;
- Posted By: Tianhe Oil
- Phone: 00862131150073
- Address: No.2999 Xinyang Road,Fengxian District, Shanghai, China
- 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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