Cross Over Joint Bit Subs - Chinaprice: contact company for price
connection of drill stem component in petroleum , natural gas
and geology drilling work.It is used mainly for connecting
of upper drill tools and lower drill tools during drilling
operations. It is divided into drill string cross-over joint
and tubing cross-over joint.There are A type (same
diameter)，B type (different diameter) and C type.
Bit subs are used to connect the drill bit to the next piece
of equipment in the BHA. Because drill bits are "pin up" and
all other drilling components are typically "pin down", the
bit sub functions as a crossover for BHA attachment.
Kelly saver subs Placed between the kelly and the drill
string, this sub is used to extend the life of the kelly by
limiting the number of times it's pin connection is made up
to the drill string. This saver sub provides a connection
between the pin end of the kelly to the box end of the drill
string such that the repetitious connecting of drill pipe is
absorbed by this sacrificial saver sub.
- Posted By: Mudanjiang Dongxu Machinery Co.,Ltd
- Phone: 8613614631909
- Address: Dongxu 2st, No.5, Aimin Dis, Mudanjiang , China
Published date: February 10, 2014 -
- Business Description: Mudanjiang Dongxu Machinery Co.,Ltd has been honored with API spec 7 1
certificate by America Petroleum Institute. Our factory covers an area
of 20000square meters with a very strong team of technicians and
researchers, possesses reliable production lines and advanced
Our products: drilling tools,fishing tools,coring tools, diamond core bit, milling tools and so on. Our team will manufacture from existing designs or collaborate with the customer to design and manufacture to their specifications.
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