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

READ MORE
The Advantages of API Plug Gauge And Ring Gauge

API Plug and Ring Gauges are vital instruments used to measure the thread dimensions of critical components across industries such as oil and gas, manufacturing, and maintenance. These gauges ensure that the threaded components comply with the American Petroleum Institute (API) standards, which are essential for the safety, reliability, and efficiency of the equipment.

2025-08-18
384-3.png
2025-08-18
The Advantages of API Plug Gauge And Ring Gauge

API Plug and Ring Gauges are vital instruments used to measure the thread dimensions of critical components across industries such as oil and gas, manufacturing, and maintenance. These gauges ensure that the threaded components comply with the American Petroleum Institute (API) standards, which are essential for the safety, reliability, and efficiency of the equipment.

READ MORE
What Are API Plug Gauge And Ring Gauge Used For?

API Plug and Ring Gauges are precision instruments used to measure the thread dimensions of various components, ensuring that they meet the strict standards set by the American Petroleum Institute (API). These gauges are essential in verifying the integrity of threaded connections in a wide range of industries, particularly in sectors like oil and gas, manufacturing, and maintenance. Their primary role is to ensure that threaded parts—such as drill pipes, casings, and valves—comply with API specifications to maintain operational safety, efficiency, and reliability. In industries where precision and safety are paramount, the use of API Plug and Ring Gauges guarantees that the components fit correctly, work efficiently, and prevent potential failures.

2025-08-18
384-2.png
2025-08-18
What Are API Plug Gauge And Ring Gauge Used For?

API Plug and Ring Gauges are precision instruments used to measure the thread dimensions of various components, ensuring that they meet the strict standards set by the American Petroleum Institute (API). These gauges are essential in verifying the integrity of threaded connections in a wide range of industries, particularly in sectors like oil and gas, manufacturing, and maintenance. Their primary role is to ensure that threaded parts—such as drill pipes, casings, and valves—comply with API specifications to maintain operational safety, efficiency, and reliability. In industries where precision and safety are paramount, the use of API Plug and Ring Gauges guarantees that the components fit correctly, work efficiently, and prevent potential failures.

READ MORE
Essential Features of API Plug And Ring Gauges

API Plug and Ring Gauges are vital instruments in ensuring the accuracy and quality of threaded connections in the oil and gas industry. These gauges are designed to verify the dimensions and integrity of threads used in a wide range of drilling equipment, including casing, tubing, and other subsurface components.

2025-08-18
384-1.png
2025-08-18
Essential Features of API Plug And Ring Gauges

API Plug and Ring Gauges are vital instruments in ensuring the accuracy and quality of threaded connections in the oil and gas industry. These gauges are designed to verify the dimensions and integrity of threads used in a wide range of drilling equipment, including casing, tubing, and other subsurface components.

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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