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API-5CT Casing

    API-5CT Casing

    API 5CT casing is a core OCTG (Oil Country Tubular Goods) product strictly manufactured in accordance with the latest API Spec 5CT international standard, serving as the primary structural protection pipe for onshore and offshore oil, gas, and geothermal wells. As the critical barrier of wellbore integrity, it is installed during drilling and completion operations to stabilize loose formations, prevent wellbore collapse, isolate oil, gas, and water layers, and avoid cross-layer fluid channeling.
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Product Overview

SANMON API-5CT Casing is a premium oilfield equipment product manufactured by Yantai Sanmen Machinery Equipment Co., Ltd, a leading Chinese manufacturer and exporter of petroleum machinery and equipment. With years of industry experience and a commitment to quality excellence, SANMON delivers reliable, high-performance products that meet the demanding requirements of modern oil and gas operations worldwide.

API 5CT casing is a core OCTG (Oil Country Tubular Goods) product strictly manufactured in accordance with the latest API Spec 5CT international standard, serving as the primary structural protection pipe for onshore and offshore oil, gas, and geothermal wells. As the critical barrier of wellbore integrity, it is installed during drilling and completion operations to stabilize loose formations, prevent wellbore collapse, isolate oil, gas, and water layers, and avoid cross-layer fluid channeling. This product effectively bears complex downhole loads including internal pressure, external extrusion pressure, axial tension, and formation shear force, ensuring long-term safe and stable operation of the entire wellbore system. API 5CT casing is mainly divided into seamless casing and high-quality welded casing, covering multiple steel grade series such as H40, J55, K55, N80, L80, C95, and P110, adapting to working conditions from shallow conventional wells to ultra-deep high-pressure and high-corrosion wells. All products adopt standardized thread types including Short Round Thread (SC), Long Round Thread (LC), and Buttress Thread (BTC). The optimized thread structure provides excellent airtightness, tensile resistance, and anti-loosening performance, effectively preventing thread leakage and connection failure under harsh downhole alternating loads. The whole production process adopts precision rolling, integral heat treatment, non-destructive testing, and surface anti-corrosion treatment, with uniform material texture, stable mechanical properties, and strict dimensional tolerance control. Each batch of products undergoes hydraulic pressure testing, tensile testing, and flaw detection inspection to fully comply with API 5CT quality specifications. Widely applicable in oil and gas exploration, well completion, well workover, and geothermal well projects, API 5CT casing is an indispensable basic equipment to guarantee drilling safety and improve reservoir development efficiency.

Technical Specifications

API 5CT casing covers complete outer diameter specifications, steel grades and thread types, meeting global oilfield standardized matching requirements. The mainstream conventional specifications and core mechanical parameters are shown below:
Outer Diameter (in)
Wall Thickness (mm)
Steel Grade
Thread Type
Yield Strength (MPa)
Tensile Strength (MPa)
Working Pressure (MPa)
Main Application
4 1/2
6.05-9.52
H40/J55
SC/LC
275-379
≥483
≤35
Shallow conventional oil and gas wells
7
7.62-10.36
J55/K55/N80
SC/LC/BTC
379-552
≥517
35-55
Medium-shallow development wells
9 5/8
8.53-11.13
N80/L80
LC/BTC
552-655
≥621
55-70
Medium-depth pressure-bearing wells
10 3/4
9.65-12.70
L80/C95
BTC
655-724
≥655
70-90
Deep high-pressure oil and gas wells
13 3/8
10.92-13.06
C95/P110
BTC
724-862
≥758
90-120
Ultra-deep wells & offshore wells
All specifications support customized wall thickness, length, and special anti-corrosion treatment. Matching couplings, pup joints and accessories are fully compliant with API 5CT and API 5B thread standards, realizing complete equipment compatibility and on-site quick assembly.

Advantages

Choosing SANMON API-5CT Casing offers numerous competitive advantages for oilfield operators and equipment distributors:

  • API Certified Quality: Manufactured to API specifications with available monogram licensing, ensuring reliable and consistent field performance that meets international standards.

  • Premium Materials: Constructed from high-grade alloy steels (4130, 4140, 4145, 4330V, 8630, and other grades as specified) with appropriate heat treatment for maximum durability and extended service life.

  • Cost-Effective Solutions: Competitive pricing structure without compromising on quality, providing excellent value proposition for operators seeking to optimize capital and operational expenditure.

  • Custom Engineering Capability: In-house engineering team capable of modifying standard designs or developing custom solutions to meet specific well conditions, dimensional requirements, or performance specifications.

  • Fast and Reliable Delivery: Efficient production planning and robust logistics partnerships ensure timely delivery to project sites worldwide via sea freight, air freight, or express courier.

  • Comprehensive Technical Support: Experienced engineering team provides pre-sale consultation, installation guidance, operational recommendations, and after-sale technical assistance.

  • Global Export Track Record: Proven history of successful product deliveries to major oil-producing regions including the Middle East, North America, Southeast Asia, Africa, CIS countries, and South America.

  • Substantial Inventory: Well-stocked warehouse with commonly ordered standard products available for immediate dispatch, reducing project lead times.

Why Choose SANMON

Yantai Sanmen Machinery Equipment Co., Ltd (SANMON) has established itself as a trusted and reliable partner in the global oilfield equipment supply chain. Here are the key reasons why customers worldwide consistently choose SANMON:

  • Deep Industry Expertise: Our team comprises petroleum engineers, mechanical engineers, and manufacturing specialists with extensive knowledge of upstream oil and gas operations. This domain expertise enables us to understand customer challenges and deliver technically appropriate solutions.

  • ISO 9001 Certified Quality System: Our quality management system ensures consistent product quality through documented processes, regular audits, and continuous improvement initiatives. Every product is manufactured, inspected, and tested according to established procedures.

  • API Licensed Manufacturer: SANMON holds API licenses for multiple product specifications, demonstrating our commitment to manufacturing products that meet the petroleum industry's most rigorous quality and performance standards.

  • Customer-Centric Flexibility: We understand that every well and every project is unique. Our flexible manufacturing approach allows us to accommodate special requirements, non-standard dimensions, and customized material specifications.

  • Strategic Cost Advantage: Located in Shandong Province, one of China's premier manufacturing regions, SANMON benefits from a well-developed industrial supply chain and skilled workforce. These structural advantages translate into competitive pricing for our customers.

  • Long-Term Partnership Philosophy: We view customer relationships as long-term partnerships rather than transactional exchanges. Our goal is to grow together with our clients through reliable products, responsive service, and mutual trust.

  • Innovation and R&D Investment: Continuous investment in research and development ensures our product portfolio evolves with industry trends. We actively incorporate customer feedback and field experience into product improvements.

  • Global Service Network: With distribution partnerships and service representatives in key oil-producing regions, SANMON provides localized support while maintaining the cost advantages of centralized manufacturing.


Frequently Asked Questions (FAQ)

Q1: What certifications and documentation does SANMON provide with the
A: We provide comprehensive documentation including material test certificates (MTC), inspection and test reports, dimensional inspection records, pressure test certificates (where applicable), and certificates of conformance. API monogram products come with full API-required documentation. Additional third-party inspection services (such as SGS, BV, DNV) can be arranged upon request.

Q2: Can SANMON customize the API-5CT Casing for specific well conditions or customer requirements?
A: Yes, customization is one of our core strengths. Our engineering team can modify standard designs to accommodate specific dimensional requirements, material grades, connection types, pressure ratings, temperature ratings, and other performance parameters. We also develop fully custom solutions for unique applications.

Q3: What are the typical lead times for SANMON products?
A: Standard catalog products are typically available from inventory for immediate shipment (3-7 days for documentation and packing). Custom-engineered products generally require 30-60 days depending on complexity, material availability, and order quantity. Rush orders can often be accommodated with expedited production scheduling.

Q4: How does SANMON ensure consistent product quality across different production batches?
A: Our quality assurance system encompasses the entire production cycle: incoming material verification (chemical composition and mechanical properties), in-process inspection at key manufacturing stages, final dimensional and visual inspection, functional testing where applicable, and final documentation review. All inspection equipment is regularly calibrated to national and international standards.

Q5: What after-sales support does SANMON offer for the
A: Our commitment extends beyond product delivery. We provide installation and operational guidance, troubleshooting assistance via email/phone/video conference, spare parts supply, and can arrange field service engineer visits when required. We maintain detailed manufacturing records to support long-term product traceability and support.

Q6: How are SANMON products packaged and shipped for international delivery?
A: Products receive appropriate surface protection (rust preventive coating, protective caps on threads and sealing surfaces) and are packed in export-standard wooden cases, plywood cases, or steel pallets as appropriate. All packages are clearly marked with product identification, handling instructions, and shipping marks. We work with major freight forwarders to arrange cost-effective sea freight, air freight, or courier delivery.

Q7: Does SANMON maintain spare parts inventory for its products?
A: Yes, we stock commonly needed spare parts, wear components, and consumables for our major product lines. This ensures that our customers can obtain replacement parts quickly to minimize operational downtime. We can also manufacture non-stock spare parts to order.

Q8: What markets and regions does SANMON currently serve?
A: SANMON exports to major oil and gas producing regions worldwide, including the Middle East (Saudi Arabia, UAE, Kuwait, Oman, Iraq, Qatar), North America (United States, Canada, Mexico), Southeast Asia (Indonesia, Malaysia, Thailand, Vietnam), Africa (Nigeria, Angola, Egypt, Libya, Algeria), Central Asia and CIS (Kazakhstan, Uzbekistan, Russia, Azerbaijan), South America (Colombia, Ecuador, Argentina, Brazil), and other regions. Our products have been successfully deployed in both established and emerging oilfield markets.

Q9: What is SANMON's approach to quality control and product testing?
A: Quality control at SANMON is a multi-layered process. It begins with supplier qualification and incoming material verification using spectrometry and mechanical testing equipment. During manufacturing, in-process inspections verify dimensional accuracy using calibrated instruments including micrometers, calipers, thread gauges, and CMM equipment. Final inspection includes comprehensive visual examination, dimensional verification, hardness testing, and functional testing. Pressure-containing components undergo hydrostatic pressure testing. All results are documented in the final inspection report provided with each shipment.

Q10: How can I obtain a quotation for the
A: To receive a prompt quotation, please contact our sales team through our website contact form, email, or phone with the following information: product name/model, required quantity, any special requirements (material grade, connection type, pressure rating, etc.), preferred delivery terms (FOB, CIF, etc.), and target delivery timeline. Our team typically responds within 24 hours with a comprehensive quotation including product specifications, pricing, packaging details, and estimated delivery schedule.


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Sanmon Machinery Equipments Co., Ltd. founded in 2010, is located in the beautifulcoastal city - Yantai of China. We are an integrated company for Oil & Gas Equipment ApplicantResearch, Customized Design, Order Production and Global Sales, We provide professional productsand services to the Oil and Gas Industrial Customers over 20 countries and regions. Our productscover Sucker Rod Pump Jack, Pump, Sucker rod and Accessories, Wellhead and X-mas Tree, Valves,Completion Tools, Artificial lift Equipment, Flow Control Equipment, Coil Tubing Tools, OilfieldWork Vehicles, Chemicals & Additives, Wire-line Tools, etc., and we supply Well CompletionService, Coil Tubing Work Service, snubbing service, Down-hole Pipe Cutting Work, ArtificialLifting Work, Special Tools and Vehicles Renting Service and other related services. Longcareered engineer and technicians, ISo and API strict quality control factory and excellentsales team are always our exclusive advantages.

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E-mail:info@cnsanmon.com 


+86 535 6527099, 6011900


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