Pup Joint VS Crossover

Pup Joint and Crossover both belongs to oilfield tubular goods. You will learn about them after reading the article.

What is Pup Joint?

Tubing joints are generally around 30 ft (9 m).The short length of Tubing Joint is called Pup Joints: it is used to adjust the length required for space out for completion string.

Pup Joint is same as Tubing Joint the Size (2-7/8”3-1/2”4-1/2"), Threads (EUE,Vam Top, JFE Bear,etc),Grade(J-55N/L-80P-110), Weight (6.5 PPF OR Ib/ft,10.4 lb/ft8.7 lb/ft) are same as Tubing Joint only difference in Length (from 1ft up to20ft).

Pup joints are also known as saver sub, spacer and pup

What is Crossover?

Crossover also called X-Over. A crossover sub is a mechanical part with threaded connections. It is used to connect threaded components that have different sizes or have different thread characteristics.

Crossover subs are typically found in the drill string between the drill pipe and drill collars or at other points in the drill string.

Crossover is a one piece tubular section used to join or change two different components with different size of tube or type of connection. These components can be casing tubing drill pipe or combination.

Crossover Types:

1. Same threads and different sizes

2. Different threads and same sizes

3. Different threads and and different sizes