1.Designs uniquely novel 2.the bearing pressure bearing completely selects import 3.good quality and using long time      kelly bar drive head and upper fitting,which uses bearings to rotate kelly bar and prevent steel wire rop breakage.Designs uniquely...

1.upper fitting of kelly bar to joint the drilling bucket 2.producing different type to match different type of kelly bar      It is kelly bar drive head and upper fitting, which  is used to joint the drilling bucket or...

1,Designs uniquely novel 2,the bearing pressure bearing completely selects import 3,good quality and using long time      kelly bar drive head and upper fitting,which uses bearings to rotate kelly bar and prevent steel wire rop breakage.Designs uniquely...

1,good quality and reasonalbe price 2,having enough intensity and durability      Damping spring is for kelly bar accessories,it assumes spiral-shaped,the elasticity is strong ,each different type of spring is suitable for different type of kelly bar. ...

1,appliede to the soft layer 2,drilling depth is deep 3,durable steel material for longtime use      The external keys of frictional pressuring kelly bar has three or six straight keys, there is no large concave pressuring table in the middle, and there are...

1,high quality and reasonable price 2,durable steel material for longtime use 3,applied to the Bauer rig usually       Locking  drilling bar, three key type and six key type two kinds, steel material adopt high quality alloy steel seamless steel...

1.high quality and reasonable price 2.transmissing the pressuring force best 3.applied to the hard layer and high efficiency      Full interlocking pressurizing kelly bar is also known as concave-convex Kai-type pressurizing kelly bar.It is used for IMT and...

1.high quality and competitive price 2.different type of kelly bar combined and advantage together 3.long time use         Combined type kelly bar is a kind of combination drill, which is formed by mechanical locking type, full interlocking...

1,high quality and competitive price 2,durable steel material for longtime use 3,applied to the hard and soft layer       The external key of the mechanical interlocking kelly bar usually hao three or six keys. There are three large groups or N groups...

1,high quality and reasonable price 2,durable steel material for longtime use 3,applied to the Bauer rig usually         Lock drilling machine, three key type and six key type two kinds, steel material adopt high quality alloy steel seamless...