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Drill stem tools
Your present position:Home > Products > By-pass Valve of Drill Tool  
By-pass Valve of Drill Tool

    By-pass valve of drill tool is used to cycle drilling fluid or killing well when the water hole of the drill bit has plugged. By-pass valve of drill tool is joined to drill bit or nearby, before drilling gas-oil layer.

Technical parameters and specifications

Type O.D.(mm) Bearing Back Pressure Thread Drill Collar(in)
ZFF127 127 35 Mpa, 70 Mpa NC38 5"
ZFF159 159 35 Mpa, 70 Mpa NC46 6 1/4"
ZFF165 165 35 Mpa, 70 Mpa NC50 6 1/2"
ZFF178 178 35 Mpa, 70 Mpa NC50 7"
ZFF203 203 35 Mpa, 70 Mpa 6 5/8REG 8"
ZFF228.6 228.6 35 Mpa, 70 Mpa 7 5/8REG 9"
ZFF241 241 35 Mpa, 70 Mpa 7 5/8REG 9 1/2"

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