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Cross Over Joint Bit Subs - China

price: contact company for price

Description:Cross-over joint acts for conversion and

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.

Company Contact:

  • Phone: 8613614631909

  • Address: Dongxu 2st, No.5, Aimin Dis, Mudanjiang , China

  • Email: Email

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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