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Pup Joint
Pup Joint
Pup Joint
Pup Joint
Pup Joint
Pup Joint
Pup Joint
Pup Joint
Pup Joint
Pup Joint
Keywords: Pup Joints, Casing Pup Joints, Tubing Pup Joints, Perforated Pup Joints
Standards: API Spec 5CT, API Spec 5B
Size Range: 2-3/8" – 20"
Tubing Pup Joints: 2-3/8" – 4-1/2"
Casing Pup Joints: 4-1/2" – 20"
Lengths: 2 ft, 3 ft, 4 ft, 6 ft, 8 ft, 10 ft, 12 ft (Custom lengths available)
Materials / Grades: J55, K55, N80-1, N80-Q, L80-1, L80-13Cr, C90, T95, P110, Q125
Thread & Coupling (T&C): EUE, NUE, STC, LTC, BTC, Premium Connections
Type: PIN × PIN, PIN × BOX

Pup joints are short-length pipes (usually shorter than Range 1) with the same threads, steel grades, and wall thicknesses as standard casing or tubing. They are used in the oil and gas industry to adjust the length of the drill string, tubing string, or casing string, ensuring that downhole tools and the wellhead are positioned at the exact required depth.

Manufactured in strict accordance with API Spec 5CT, our pup joints are made from high-quality seamless pipes. They are widely used in well completions, workover operations, and drilling applications where precise depth adjustment is critical.


Types of Pup Joints

1. Tubing Pup Joints

Threads: NUE (Non-Upset) or EUE (External Upset).

Application: Used in production tubing strings to adjust the depth of packers, gas lift mandrels, or submersible pumps.

2. Casing Pup Joints

Threads: STC, LTC, or BTC.

Application: Used in casing strings to ensure the casing shoe or wellhead connections land at the exact required depth.

3. Drill Pipe Pup Joints

Threads: NC, IF, REG (API Spec 7-1).

Application: Used on the rig floor to adjust the length of the drill string, especially when adding a kelly or top drive.


Material & Manufacturing

Material Matching: The pipe body is manufactured from the exact same steel grade as the main casing or tubing string to ensure consistent tensile strength and corrosion resistance.

Threading: Machined on CNC lathes in strict accordance with API 5B standards.

Heat Treatment: For high grades (e.g., L80, P110), the pup joint undergoes the same Quenching and Tempering as the main pipe to ensure mechanical properties are fully matched.


Features of Pup Joints

Precise Length Adjustment: Manufactured in specific short lengths (e.g., 2ft, 3ft, 5ft, 10ft) to fill the exact gap in the string, ensuring downhole tools and wellheads land at the precise target depth.

Material & Grade Matching: Produced from the exact same steel grade (e.g., J55, P110, L80-13Cr) as the main casing or tubing to prevent galvanic corrosion and ensure uniform tensile strength.

Multiple Connection Types: Available in PIN × PIN (double pin) and PIN × BOX (pin and box) configurations to meet various make-up requirements.

Premium Thread Options: Standard API threads (EUE, NUE, STC, LTC, BTC) and gas-tight premium connections are available for HPHT and corrosive environments.

Strict NDT Testing: 100% Non-Destructive Testing (UT, MPI) and API thread gauging ensure leak-free performance and structural integrity.


Applications of Pup Joints

Well Completion: Used in tubing strings to adjust the depth of packers, safety valves, gas lift mandrels, and submersible pumps.

Casing Landing: Used in casing strings to ensure the casing shoe, hanger, or wellhead connections align perfectly at the surface.

Drilling Operations: Used on the rig floor (usually as Drill Pipe Pup Joints) to adjust the kelly or top drive height during drilling.

Workover & Remedial Operations: Essential for making quick length adjustments during well interventions.

Special Services (Perforated Pup Joints): Used in production strings to allow fluid entry, circulation, or washing in specific well zones.


Specification of Pup Joints

SPECIFICATIONS

TUBING PUP JOINT

OD

GRADE

END TYPE

LENGTH(FT)

2 3/8″

J/K/L/N/P

NUE/EUE

2/3/4/5/6/8/10/12

2 7/8″

J/K/L/N/P

NUE/EUE

2/3/4/5/6/8/10/12

3 1/2″

J/K/L/N/P

NUE/EUE

2/3/4/5/6/8/10/12

4 1/2″

J/K/L/N/P

NUE/EUE

2/3/4/5/6/8/10/12


CASING PUP JOINT

OD

GRADE

END TYPE

4 1/2″

J/K/L/N/P

LTC/STC/BTC

5″

J/K/L/N/P

LTC/STC/BTC

5 1/2″

J/K/L/N/P

LTC/STC/BTC

6 5/8″

J/K/L/N/P

LTC/STC/BTC

7″

J/K/L/N/P

LTC/STC/BTC

7 5/8″

J/K/L/N/P

LTC/STC/BTC

7 3/4″

J/K/L/N/P

LTC/STC/BTC

8 5/8″

J/K/L/N/P

LTC/STC/BTC

9 5/8″

J/K/L/N/P

LTC/STC/BTC

10 3/4″

J/K/L/N/P

STC/BTC

11 3/4″

J/K/L/N/P

STC/BTC

13 3/8″

J/K/L/N/P

STC/BTC

Size / Thread

Weight*

Grades

Length

Surface treatment

Coupling

2 3/8″ EUE

4.7

J55 / L80/P110

R1/R2/R3

painting

C/W/N/S

2 7/8″ EUE

6.5

J55 / L80/P110

R1/R2/R3

painting

C/W/N/S

3 1/2″ EUE

9.3

J55 / L80/P110

R1/R2/R3

painting

C/W/N/S

4 1/2″ EUE

12.75

J55 / L80/P110

R1/R2/R3

painting

C/W/N/S

2 3/8″ NUE

4.6

J55 / L80/P110

R1/R2/R3

painting

C/W/N/S

2 7/8″ NUE

6.4

J55 / L80/P110

R1/R2/R3

painting

C/W/N/S

3 1/2″ NUE

9.2

J55 / L80/P110

R1/R2/R3

painting

C/W/N/S

4 1/2″ NUE

12.6

J55 / L80/P110

R1/R2/R3

painting

C/W/N/S


Standards of tubing pup Joint

Standard

Steel Grade

Yield Strength

(MPA)

Tensile Strength

(MPA)

Elongation

min

max

min

API 5CT

J55

379

552

517

0.5

N80

552

758

689

0.5

Standards of casing pup Joint

Grade

Yield Strength

Tensile Strength

Min

Max

Min

Psi

MPA

Psi

MPA

Psi

MPA

J55

55000

379

80000

552

75000

517

K55

55000

379

80000

552

95000

655

N80

80000

552

110000

758

100000

689

L80

80000

552

95000

655

95000

655

P110

110000

758

140000

965

125000

862


We offer customized packing solutions to ensure your products arrive in perfect condition. Our standard packing includes steel belt bundling, wooden cases, and waterproof plastic wrapping, all labeled strictly according to API 5CT standards.


Pup-joint-packing


Q1: Why do I need a Pup Joint in my string?
A: A pup joint is a short-length pipe used to make precise adjustments to the total length of a casing, tubing, or drill string. When the main string doesn't land exactly at the wellhead or target depth, a pup joint ensures that downhole tools (like packers or gas lift mandrels) and the wellhead are positioned perfectly.


Q2: Are your pup joints made of the exact same material as the main pipe?

A: Yes. To prevent galvanic corrosion and ensure uniform tensile strength, our pup joints are manufactured from the exact same steel grade (e.g., J55, P110, L80-13Cr) and undergo the same heat treatment as your main casing or tubing. We conduct strict Chemical Composition Analysis to guarantee the match.


Q3: What is the difference between PIN×PIN and PIN×BOX pup joints?
A:PIN × BOX (Pin and Box): One end has a male thread (pin) and the other has a female thread (box). This is the most common type, used to connect standard pipe joints.

PIN × PIN (Double Pin): Both ends have male threads. They are typically used with specific downhole tools, crossovers, or when connecting two female-ended components.


Q4: What are Perforated Pup Joints used for?
A: Perforated pup joints have pre-drilled holes on the pipe body. They are typically installed in the tubing string to allow fluid entry, assist with well washing, or facilitate circulation in specific production zones. We can customize the hole size and density based on your well completion design.


Q5: How do you ensure the quality of the threads?
A: We maintain Strict Quality Control. Every pup joint undergoes 100% API ring and plug gauge inspection (according to API 5B) to verify thread taper, lead, height, and angle. We also conduct Magnetic Particle Inspection (MPI) to detect any thread defects. Third-party inspections (SGS, BV) are fully accepted.


Q6: Can you provide custom lengths and premium connections?
A: Yes. We offer Integrated Customized Services. Standard lengths include 2ft, 3ft, 5ft, 6ft, 10ft, and 12ft, but we can cut and thread to your exact custom lengths with short lead times. We also supply premium gas-tight connections (equivalent to VAM types) for HPHT environments.


Related Products

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Keywords: Drill Collar, Spiral Drill collar, Non-magnetic Drill Collar Standard: API SPEC 7-1 Steel Grade: AISI 4145H MOD Sizes: 3 1/8" – 11" (OD) Connection Type: NC, IF, REG Length: Range 2 (30 ft) & Range 3 (31 ft) (with standard tolerance of ±6 inches) Type of Design:Plain (Slick), With a recess of the elevator, With a recess of the elevator and power slips, Spiral (with spiral grooves) and a wide range of custom mixtures
Keywords: OCTG Coupling, Tubing Coupling, Casing Coupling Size:Tubing Coupling: 33.35 mm × 80.96 mm ~ 141.30 mm × 158.75 mm (OD × Length) Casing Coupling: 127 mm × 158.75 mm ~ 553.4 mm × 269.88 mm (OD × Length) Standard: API 5CT, API 5B Grade: J55, K55, N80-1, N80-Q, C90, C95, T95, P110, Q125 Thread Types: NUE, EUE, STC, LTC, BTC, Special Clearance (SC), Premium Connections (VAM Equivalent) Usage: Used for connecting two joints of oil tubing or casing. Packing: Protection caps at both ends, waterproof paper wrapped, two tags.

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Address:
Hunan Steel Industrial Zone,No.9 Xiangfu Road, Yuhua District,Changsha,Hunan,China.
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