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
未标题-1_1536_864.jpg
2025-04-21
Key Changes in API 5CT 11th Edition

Key Changes in API 5CT 11th Edition

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How API 5CT Casing Couplings Enhance Well Integrity And Safety in Drilling Operations

In oil and gas drilling, well integrity is the foundation of safe, efficient, and productive operations. From exploration to production, maintaining control over the wellbore is vital to preventing blowouts, fluid migration, casing collapse, or environmental contamination. Among the many components responsible for well integrity, the API 5CT casing coupling plays a fundamental yet often overlooked role.

2025-06-17
736-3 API 5CT Casing Coupling.png
2025-06-17
How API 5CT Casing Couplings Enhance Well Integrity And Safety in Drilling Operations

In oil and gas drilling, well integrity is the foundation of safe, efficient, and productive operations. From exploration to production, maintaining control over the wellbore is vital to preventing blowouts, fluid migration, casing collapse, or environmental contamination. Among the many components responsible for well integrity, the API 5CT casing coupling plays a fundamental yet often overlooked role.

READ MORE
Essential Factors To Consider When Selecting API 5CT Casing Couplings for Oilfield Applications

In the demanding environment of oil and gas exploration, API 5CT casing couplings play a critical role in ensuring well integrity. These components are used to join sections of casing pipes, forming a continuous and pressure-resistant conduit in the wellbore. Casing provides structural support to the well and isolates different underground zones to prevent fluid migration.

2025-06-17
736-1 API 5CT Casing Coupling.png
2025-06-17
Essential Factors To Consider When Selecting API 5CT Casing Couplings for Oilfield Applications

In the demanding environment of oil and gas exploration, API 5CT casing couplings play a critical role in ensuring well integrity. These components are used to join sections of casing pipes, forming a continuous and pressure-resistant conduit in the wellbore. Casing provides structural support to the well and isolates different underground zones to prevent fluid migration.

READ MORE
What is the Difference Between a Flow Coupling and a Blast Joint?

What is the Difference Between a Flow Coupling and a Blast Joint in the Oil and Gas Industry?In the complex infrastructure of oil and gas wells, specialized components like flow couplings and blast joints play critical roles in ensuring operational safety and longevity. Though both are types of tubu

2025-03-27
微信图片_20250421155907_508_508.png
2025-03-27
What is the Difference Between a Flow Coupling and a Blast Joint?

What is the Difference Between a Flow Coupling and a Blast Joint in the Oil and Gas Industry?In the complex infrastructure of oil and gas wells, specialized components like flow couplings and blast joints play critical roles in ensuring operational safety and longevity. Though both are types of tubu

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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