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Richsen Logo tjrichsen.com

Leading Manufacturer of Oilfield Equipment

High quality API 5CT standard seamless pipe. Focus on supply OCTG product, made in China for over 15 years.

WE MACHINE YOUR CONCERN

One Stop Shop for Your Machining Solutions

RICHSEN IS COMMITTED TO

Providing Integral Solutions for Thread Inspection of Casing/Tubing Production

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Our Products

Comprehensive range of OCTG and thread inspection solutions engineered for reliability and performance in oilfield operations.

API 5CT OCTG Seamless LTC Casing Pipe

API 5CT OCTG Seamless LTC Casing Pipe

  • OD Size: 4-1/2" ~ 20" (114.3mm ~ 508mm)
  • Thread: STC / LTC / BTC
  • Premium Threads: TTGM-4 (VAM TOP), TSH PH6, VAM FJL, Big Omega
  • Certificate: CAL IV test certificate
API 5CT Casing Coupling

API 5CT Casing Coupling

  • Size: 4-1/2" to 20"
  • Grades: J55, K55, L80, N80-1, N80-Q, C90, T95, C110, P110, Q125
  • Thread Type: STC, LTC, BTC
  • Premium: TTGM-4 (VAM TOP Interchangeable), New Vam, Big Omega
API Crossover Subs

API Crossover Subs

  • Standard: API 5CT casing and tubing
  • Thread Types: PIN*PIN, PIN*BOX, BOX*BOX
  • Grades: J55, N80, L80, P110, 42CrMo, AISI 4140
  • Thread Options: API NC, IF, Reg, Buttress, Premium
Lead Gauge

Lead Gauge

  • Description: Critical for thread cutting accuracy
  • Function: Prevents lead error and standoff error
  • Types: Lead Gauge for PIN, Lead Gauge for BOX
  • Application: Manual and CNC lathe thread inspection
Blast Joint

Blast Joint

  • Purpose: Protect casing from erosion at wellhead
  • Material: High-strength steel with wear-resistant coating
  • Compatibility: API and premium connections
  • Standards: API 5CT, ISO 11960
Casing Shoes

Casing Shoes

  • Function: Guide casing into wellbore, prevent damage
  • Sizes: Match casing OD from 4-1/2" to 20"
  • Materials: Forged steel, heat-treated for durability
  • Thread: API LTC, BTC, or premium connections
Flow Couplings

Flow Couplings

  • Application: Enable circulation during cementing
  • Design: Internal ported or external sleeve type
  • Activation: Ball drop, pressure, or mechanical
  • Standards: API 5CT, custom engineering available
API Thread Gauge

API Thread Gauge

  • Purpose: Verify thread dimensions and integrity
  • Types: Plug gauge (PIN), Ring gauge (BOX)
  • Standards: API 5B, ISO 10424-2
  • Accuracy: ±0.001" tolerance, calibrated traceable

About Us

TIANJIN RICHSEN OIL EQUIPMENT CO., LTD is an OCTG comprehensive solution provider based in China, serving the global market. We offer integral solutions ranging from procurement, marketing, information, research and development, production, processing, to logistics.

Casing, Tubing, and Couplings are our core products. We are dedicated to developing premium connections to serve clients all over the world with high reliability and performance standards.

Learn More
Oil drilling and extraction

Our Advantages

Why global oil companies trust Richsen for their OCTG and inspection needs.

Excellent, Reliable Brand

Cooperated with CNPC, SINOPEC, CNOOC, and other globally renowned oil companies.

Professional Manufacturing

Two Casing/Tubing threading mills, one Coupling Mill, and 40+ senior engineers.

Intelligent Team

Global marketing department with multilingual professionals ready to serve you.

Global Reach

Serving over 20 countries with more than 2000 tons of coupling stock available.

2000+
Tons of Coupling Stock
20+
Export Countries
20+
Served Customers

Solution Display

Oil Drilling

High-integrity casing and tubing systems designed for extreme downhole conditions, ensuring wellbore stability and safety.

Oil Extraction

Premium connections and accessories that enhance production efficiency and reduce downtime during extraction operations.

Get in Touch

Contact us for product inquiries, technical support, or partnership opportunities.

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