Pup Joint

The pup joint is a commonly utilized fitting in industrial pipe connections. According to various connections, it can be normally divided into thread and flange types. The threaded type can be further categorized into two-head external thread, single-head external thread, and flathead external thread types. In addition, the item falls under tubing and casing types based on various usages.

Compared with the tubing, it is simply different in length. We can produce a variety of flat-end and external upset tubing pup joints with J, N, L, and other steel grades and different specifications.

The pup joint is a casing or tubing of length shorter than Range 1 with the same thread connection, used to adjust the length of tubular strings to its exact requirement.

Pup Joints are manufactured from AISI 4145H or 4140H-modified alloy, heat-treated to a Brinell Hardness range of 285-341 with a Charpy “V” notch minimum impact strength of 40 ft/lb at 70° F and one inch below the surface. Pup Joints are heat-treated to 110,000 PSI minimum yield. All connections are phosphate-coated to impede galling during initial make-up.

They are available in standard lengths of 5’, 10’, 15’, and 20’ with other configurations upon request. We can offer a wide range of drill string products and accessories with standard API or proprietary high-performance connections to meet the most demanding drilling requirements.