Ruitai - Pup Joints
From API Casing & Tubing
Pup Joints are short drill pipe used to adjust the length of the drill string and are available in standard lengths of 5′, 10′, 15′, 20′ and can be ordered to match other drill pipe dimensions.
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Products Details
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 phos-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.
Pup joints are commonly used to adjust the length of the drill string to the elevation of rotary table for easy surface handling and drilling practices. They undergo the same stresses as drill pipe and their performance depends primarily on their superior mechanical properties.
A pup joint is a pipe of non-standard length used to adjust the length of tubular strings to its exact requirement.
API casing and tubing pup joints are manufactured according to API Spec 5CT using prime API monogrammed, seamless oil country tubing.
- Grade: J55/K55/N80/L80/P110/C95
- Size: tubing coupling from 1.9″ to 4-1/2″,Casing coupling fro4-1/2″to 13-3/8″
- Threads: BTC, LTC, STC.
- Type: NU, EU(tubing coupling), STC,LC,BTC(casing coupling).
- Lengths: 2,3,4,6,8,10 12 ft (with other lengths available upon request).
- Outside Diameter of Tubing Joint: From 2-3/8″(60.3mm) to 4.5″(114.60mm)
- Outside Diameter of Casing Joint: From 4-1/2″(114.3mm) to 20″(508mm)
- Surface treatment: Whole phosphating, or inside phosphating and outside coating
- Protection of Thread: Thread protector
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