TEL: +86-16602616167   E-MAIL:sales01@richsen.cn
blast joint
High quality API 5CT standard seamless pipe
Focus on supply OCTG product , made in China for over 15 years.
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casing coupling
WE MACHINE YOUR CONCERN, ONE STOP SHOP 
FOR YOUR MACHINING SOLUTIONS
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pup joint
RICHSEN IS COMMITTED TO
Providing Integral solutions for Thread Inspection of Casing/Tubing production to customers all over the world.
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OUR PRODUCTS

API 5CT OCTG Seamless LTC Casing Pipe
  • Description: Casing pipe is tubing that is set inside the drilled well to protect and support the wellstream.
  • OD size : 4-1/2"~20"(114.3mm~508mm)
  • Thread: STC/LTC/BTC
  • Premium thread : TTGM-4 (VAM TOP) with CAL IV test certificate/TSH PH6/VAM FJL/New vam/Big Omega
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API 5CT Casing Coupling
  • Casing Coupling size: 4-1/2" to 20"
  • Grade: J55, K55, L80, N80-1, N80-Q, C90, T95, C110, P110, Q125.
  • Thread Type: STC, LTC, BTC
  • Premium thread: TTGM-4 (VAM TOP Interchangeable) with CAL IV test certificate/New Vam/Big Omega/TSH PH6 interchangeable connection.
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API Crossover Subs
  • Specification: Conform to API 5CT casing and tubing
  • Thread buckle type: PIN*PIN, PIN*BOX, BOX*BOX
  • Grade: J55、N80、L80、P110、42Crmo、AISI 4140
  • Thread Type: API NC, IF, Reg, Buttress, Premium etc
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Lead Gauge
Description:Thread Lead is probably one of the most important thread elements if not the most important in the thread cutting industry. Lead error (which often leads to standoff error on tapered threads) is the most common error generated by manual and CNC lathes not cutting properly.
Type:Lead Gauge for PIN、Lead Gauge for BOX
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SOLUTION DISPLAY



ABOUT US

TIANJIN RICHSEN OIL EQUIPMENT CO.,LTD is an OCTG Comprehensive solution provider based on China serving global market. We offer integral solution ranging of Procurement,  Marketing, Information, Research and Development, Production, Processing, Logistics. Casing/Tubing/Couplings are our core product, we dedicated to develop premium connection for serve clients all over the world.​​​​​​​
2000
+​​​​​​​
Coupling stock (tons )
20
+
Export country​​​​​​​
20
+
Served customer quantity

OUR ADVANTAGE

NEWS

Check our news to know more about RICHSEN.
Key Changes in API 5CT 11th Edition

Key Changes in API 5CT 11th Edition

2025-04-21
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2025-04-21
Key Changes in API 5CT 11th Edition

Key Changes in API 5CT 11th Edition

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What Is A Lead Gauge And How Is It Used in Manufacturing?

In the world of manufacturing, precision is key. Every component, from intricate mechanical parts to robust industrial machinery, must be measured and tested with the utmost accuracy. Among the various tools used in this process, a lead gauge stands out as a crucial instrument for measuring and ensuring the correct dimensions of a product. But what exactly is a lead gauge, and why is it essential in the manufacturing process?

2025-12-03
5.jpg
2025-12-03
What Is A Lead Gauge And How Is It Used in Manufacturing?

In the world of manufacturing, precision is key. Every component, from intricate mechanical parts to robust industrial machinery, must be measured and tested with the utmost accuracy. Among the various tools used in this process, a lead gauge stands out as a crucial instrument for measuring and ensuring the correct dimensions of a product. But what exactly is a lead gauge, and why is it essential in the manufacturing process?

READ MORE
The Importance of Regular Maintenance for Blast Joints in Industrial Operations

In industrial operations, particularly those involving pipelines, oil and gas, or other high-pressure systems, the integrity of various components is crucial for ensuring smooth and safe operations. One such critical component is the blast joint, which plays a vital role in the functionality of these systems. Despite their importance, many operators overlook the need for regular maintenance of blast joints, which can lead to significant operational issues, including system failure, costly downtime, and even safety hazards.

2025-12-01
3.jpg
2025-12-01
The Importance of Regular Maintenance for Blast Joints in Industrial Operations

In industrial operations, particularly those involving pipelines, oil and gas, or other high-pressure systems, the integrity of various components is crucial for ensuring smooth and safe operations. One such critical component is the blast joint, which plays a vital role in the functionality of these systems. Despite their importance, many operators overlook the need for regular maintenance of blast joints, which can lead to significant operational issues, including system failure, costly downtime, and even safety hazards.

READ MORE
The Role of Blast Joints in Ensuring Safety in High-Pressure Systems

In high-pressure systems, whether they are used in industrial applications, oil and gas exploration, or chemical processing, safety is of paramount importance. These systems operate under extreme conditions where even a minor failure can have catastrophic consequences. One crucial component in these systems that contributes significantly to safety is the blast joint. This often-overlooked component plays a vital role in ensuring the integrity of the system under high-pressure and high-temperature conditions.

2025-11-28
2.jpg
2025-11-28
The Role of Blast Joints in Ensuring Safety in High-Pressure Systems

In high-pressure systems, whether they are used in industrial applications, oil and gas exploration, or chemical processing, safety is of paramount importance. These systems operate under extreme conditions where even a minor failure can have catastrophic consequences. One crucial component in these systems that contributes significantly to safety is the blast joint. This often-overlooked component plays a vital role in ensuring the integrity of the system under high-pressure and high-temperature conditions.

READ MORE
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TIANJIN RICHSEN OIL EQUIPMENT CO.,LTD is an OCTG Comprehensive solution provider based on China serving global market. 

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