99在线精品免费视频,中文字幕电影在线观看,中文在线视频,中日韩在线视频,色老头综合免费视频,午夜女上男下xx00xx00动态,国产精品成人网

Chinese    English
Product List
Well head tools
Drill stem tools
Directional well tools
Coring tools
Cementing tools
Downhole servicing tools
Fishing tools
Milling tools
Accident remedy tools
Bits
Contact us

General manager: 86-453-6524782
Technology consulting:86-453-6540315
Zip code:157010
Web: www.hovercrafthq.com
Email: mdjjcsy@126.com
Addess: Aimin District East New Street 
No. 58

 
Drill stem tools
Your present position:Home > Products > Full-opening Valve  
Full-opening Valve

    Full-opening valve is a manually operated valve in the drill string circulating system, specially used in the emergent situation of blowout. While blowout, the kelly is in the well, may close the upper kelly valve first, then lift up the kelly and close the spray-preventing device, so may avoid breaking the water pipe.
    During the normal operation, close the full-opening valve before remove the kelly, may avoid the drill fluid to spatter on the drill table.

Technical parameters and specifications

Type Thread connection O.D.(mm) I.D.(mm)
QK 190 NC50 190 82.6
QK 168 NC50 168 70
QK 140 NC38 140 61.9
QK 127 NC38 127 51

Copyright:Mudanjiang Construction Material Petroleum Machinery Co.,Ltd    HEI ICP 11006197 No. -1    Technical support:Mudanjiang excellence network company