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Product Kelly Manual Valve - China

price: contact company for price

Kelly valve is a manually operated ball type drill stem

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;

Tool OD;

Working Pressure: 5, 000 / 10, 000 / 15, 000 PSI;

Tool connection.

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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