Cross over

A crossover sub is used to crossover from one connection size to another or as the disposable component used to extend the connection life of a more expensive drill stem member. Cross-over sub is mainly a short sub assembly which is used to enable the connection of two components with differing thread types or sizes.


Couplings are short subassemblies used to enable two components with the same connection and size to be connected. Couplings are also known as loose coupling and spare coupling. 

Pup Joint

Pup joints are non-standard lengths of piping used to adjust the height of full length tubing, or casing strings.
< 1 >


You can email us

24-Hour Consultation Hotline

Tel: +86 317 8619299

Cell & Whatsapp: +86 156 3178 9921

Head office Address

No. 5, Zhenggang Road, Wumaying Industrial Zone, Cangzhou, Hebei, China

Please tell us what you need

Our engineers will contact you within 12 hours and provide free proposal and quotation.

Copyright © Cangzhou Ruitai Petroleum Machinery Co., Ltd | Power  | SEO | Tag