Xuzhou E&P Petroleum Equipment Co., Ltd.: A Leader in Casing Coupling Manufacturing
Established in July 2016 (API 5CT License No. 1925), Xuzhou E&P Petroleum Equipment Co., Ltd. is a state-owned enterprise specializing in high-quality oilfield casing couplings, tubing accessories, and wellhead components. With a steadfast commitment to innovation and reliability, the company has emerged as a trusted partner in China’s petroleum industry, renowned for its technical expertise and customer-centric services.
Advanced Manufacturing CapabilitiesAPI 5CT couplings
The company operates a cutting-edge production facility equipped with:API 5CT couplings
32 CNC machines for precision threading and machining.API 5CT couplings
11 sawing machines, 9 conventional lathes, and 5 pneumatic marking systems for efficient material processing.
4 magnetic particle flaw detectors, impact testers, tensile testers, and hardness analyzers to ensure metallurgical compliance.
Over 100 specialized thread gauges for rigorous dimensional verification.
This infrastructure supports an annual production capacity exceeding 3 million couplings, catering to global demand across onshore and offshore projects.
Product PortfolioAPI 5CT couplings
Xuzhou E&P offers a comprehensive range of couplings with specifications covering:
Sizes: 2-3/8” to 20”, adaptable to varied well diameters.API 5CT couplings
Steel Grades: J55, K55, N80, L80, P110, Q125, compliant with API 5CT and custom requirements.
Thread Types: API-standard EU, NU, LC, SC, and BC threads, alongside premium connections for critical applications.API 5CT couplings
Quality Assurance and Certifications
The company’s unwavering dedication to excellence is validated by:API 5CT couplings
API 5CT and API 5L Certification: Adherence to American Petroleum Institute standards for material properties, threading, and performance.
ISO 9001, ISO 14001, and ISO 45001 Certifications: A holistic management system ensuring quality consistency, environmental responsibility, and workplace safety.
Product Liability Insurance: Additional financial protection for clients, underscoring confidence in product reliability.
Commitment to Client Success
Xuzhou E&P distinguishes itself through rapid response times, technical support, and tailored solutions for complex well conditions. By integrating stringent quality control, advanced R&D, and agile logistics, the company delivers couplings that meet the evolving demands of the energy sector while minimizing downtime and operational risks.API 5CT couplings
ConclusionAPI 5CT couplings
In an industry where equipment failure can lead to catastrophic consequences, Xuzhou E&P Petroleum Equipment Co., Ltd. stands as a beacon of reliability. Its API- and ISO-certified couplings, backed by robust manufacturing prowess and proactive customer care, empower drilling operators to achieve safer, more efficient, and sustainable well construction worldwide. For partnerships that prioritize quality and trust, Xuzhou E&P remains a premier choice in the global oilfield supply chain.API 5CT couplings
1. Different port positioning: FOB usually refers to the port in the seller's country, while CIF specifically refers to the port in the buyer's country. 2. Cost structure differences: FOB mainly covers the ex factory price of goods, export customs clearance fees, and related expenses for loading goods into the buyer's designated cabin, with additional seller profits. In contrast, CIF adds ocean freight and insurance fees on top of FOB price. 3. Different insurance treatments: Under FOB terms, insurance matters are handled by the buyer, and the seller needs to notify the buyer before shipment. In CIF terms, the seller is responsible for handling and paying the insurance premium. The seller also needs to handle the insurance according to the contract terms and insurance terms, and hand over the insurance policy to the buyer. 4. Different shipping arrangements: Under FOB conditions, the buyer is responsible for designating a shipping company or freight forwarding company for shipping arrangements, which may affect the seller's delivery time and bank document submission process. Under CIF conditions, the seller has the right to independently choose the shipping company or freight forwarding company. 5. Different loading notification times: Under FOB terms, the seller must notify the buyer of the loading content and details before loading to ensure that the buyer has sufficient time to handle marine insurance. Under CIF terms, as insurance is handled by the seller, the shipping notice can be notified to the buyer within a few days after shipment. 6. The risk of force majeure varies: under CIF terms, the seller is responsible for handling insurance and purchasing it at the port of departure. In the event of customer refusal or cancellation, the seller can claim compensation from the local insurance company with the insurance policy. Under FOB terms, insurance is handled by the buyer, and the policy is held by the buyer. Moreover, insurance companies are mostly located abroad, making it difficult for the seller to claim compensation from them and obtaining evidence.
Tubing coupling is a type of drilling tool used in oil fields, mainly for connecting tubing. The design of oil pipe couplings solves the problem of fatigue and fracture easily caused by stress concentration in existing couplings. Its structural features include: The end of the oil pipe is connected to the inner wall of the coupling body through a tapered thread. The end of the coupling body is connected to the oil pipe through the same thread and the same pitch flat thread method. This design has the characteristic of relieving stress concentration at the root of the external thread of a single cone thread connected oil pipe, making it less prone to fatigue fracture and effectively preventing the occurrence of oil well string breakage accidents. The commonly used steel grades for oil pipe couplings include J55, K55, N80, L80, P110, etc. The selection of these steel grades depends on the specific usage environment and requirements. The use of tubing couplings not only improves the safety and efficiency of oilfield drilling operations, but also provides important technical support for oil extraction. In addition, there are various types and specifications of tubing couplings, which can be selected and customized according to different drilling needs to meet the drilling operation requirements under various complex geological conditions.
The casing coupling is a key component used in oil drilling and extraction, mainly used to connect the casing and ensure the smooth progress of drilling operations. It is a petroleum term approved by the National Science and Technology Terminology Review Committee in 1994, and belongs to the field of petroleum engineering. The function of casing coupling is to strengthen the connection of casing, improve its structural strength and sealing performance, in order to cope with complex geological conditions that may be encountered during drilling, such as collapse layers, oil layers, gas layers, etc. Different types of casing couplings are made of different materials and designed according to their usage environment and functions to ensure the safety and efficiency of drilling operations. For example, technical casing is used in the drilling process of complex formations. When encountering collapsed layers, oil layers, gas layers and other complex parts, technical casing needs to be installed for sealing, otherwise drilling cannot proceed. These casing couplings require high mechanical and sealing performance, and use high-grade steel to ensure the safety and efficiency of drilling operations. In addition, the design and manufacturing of casing couplings involve multiple considerations, including material selection, dimensional accuracy, connection methods, etc., to ensure that they can adapt to various extreme working environments. For example, certain specially designed casing couplings can effectively alleviate stress concentration, reduce the risk of fatigue fracture, and thus improve the safety and reliability of oil wells3. In summary, casing couplings are essential components in oil drilling and extraction, and the quality of their design and manufacturing directly affects the success of drilling operations.
Tubing couplings are mainly used in oilfield drilling tools, specifically for connecting tubing. Its design aims to solve the problem of fatigue fracture that may occur in existing couplings due to stress concentration. The structural characteristics of the oil pipe coupling include the connection of the oil pipe end and the inner wall of the coupling body in a conical thread manner, while the end of the coupling body is connected to the oil pipe in a flat thread manner with the same thread and pitch. This design helps alleviate the problem of stress concentration at the root of the external thread of the oil pipe connected by a single conical thread, making it less prone to fatigue fracture and effectively preventing the occurrence of oil well string breakage accidents. In contrast, casing couplings are mainly used to protect the wellbore, prevent wellbore collapse or deformation, and ensure the smooth progress of drilling operations. It is usually used together with casing short sections to form an important component in oil drilling and extraction. Overall, tubing couplings focus on connecting and protecting tubing, while casing couplings are more focused on protecting the stability of the wellbore and drilling process. These two types of couplings play an indispensable role in oil and gas extraction, each playing a unique role.
