Product description
API Coupling
As we know steel pipe coupling is a short pipe or tube that with threads on both ends, used to connect pipelines. So It is a kind of pipe fittings that with threaded connection, the advantage is easy for pipeline maintenance or to replace the broken pipe.
API Coupling refers to the steel couplings that used in connecting casing pipe and tubing. Also known by OCTG coupling, it is usually manufactured in seamless type, material grade same with the pipe body (API 5CT K55/J55, N80, L80, P110 etc), same PSL or providing higher grades than requested. Same heat treatment also applicable, except there is an special requirements.
Tubing coupling
Introduction
Normally tubing coupling OD maximum is 4 1/2", as the tubing pipe is applied for the drilling activities (Inside the tubing is the sucker rod to drill/pump the oil), couplings type is more various and rigorous than casing, mostly used is thicken type upset coupling (Internal upset and external upset), for short is EUE coupling, it is the most favorable in tubing connections. Tubing with EU end (EUE) coupling connection also called UPTBG. Because of the end of the tubing is thickened (upset), the connecting stress is better than buttress coupling.Buttress coupling another type used for tubing connections, it has the same thickness of the pipe body, called NU end (NUE)tubing or TBG.
Features
The oil tubing coupling can solve the problem of fatigue fracture in the existing coupling due to stress concentration. Oil tubing end is connected to the inside wall of the coupling in a tapered thread. The coupling body end and oil tubing are connected with same thread pitch flat thread. The coupling is not easy to produce fatigue fracture, and has good connection effect. It can prevent the accident of oil well pipe string break effectively.
Our Company
Tianjin Dongfanglong Petroleum Equipment Manufacture Co., Ltd. Was founded in 1999, mainly engaged in oil pipes and pipe fittings, oil special drilling and production tools and oil automation equipments. The company is named as national integration and standard implementation enterprise, a national science and technology-based small and medium-sized enterprise. With honors of"Henan enterprise technology center", "Henan postdoctoral innovation practice base", the company hold 35 senior engineers, engineers and technicians, and has successively obtained ISO9001 Quality system certificates, API 5CT certificate authorized by American Petroleum Institute and BV Quality supplier evaluation certificate issued by company of France. Owing more than 30 independent intellectual property rights, forming an industrial chain integrating design, development, manufacturing, testing and experiment of numerical control automation equipment for petroleum machinery products, which can meet customers′ demand for products Full cycle service.
The company has established the "Dong Fang Yunlong E-commerce Trading Platform" with oil drilling and production equipment and tools as the radiation point, improved the ability of Internet cross-border e-commerce, and completed the transformation of enterprise from internal operation to building industry alliance. It has built an intelligent workshop, expanded the support of intelligent manufacturing for enterprise operation, created a new intelligent manufacturing mode with high efficiency and flexibility, and improved the core competitiveness of the enterprise. And successfully registered production and sales companies in the Netherlands, opening a new starting point for overseas investment and development.
In the future, Dongfanglong will closely focus on national policy orientation and innovation driven development strategy, formulate sustainable development transformation strategy, keep forging ahead, take creating world famous brand and winning honor for the nation as the goal, work together with people of insight from all walks of life for win-win cooperation, and build up the dream of oil equipment manufacturing.
Quality contro
Packing
Delivery
FAQ:
Q: Are you a factory or a trading company?
A: We are Henan Dongfanglong Machinery Manufacturing Company.
Q: How do I place an order?
A: Inquiry with us → Customize based on drawings and samples → Inform us of the usage scenario → Receive our product design recommendations → Negotiate on details → Confirm the sample → Sign the contract/pay the deposit → Mass production → Goods ready → Balance/delivery → Further cooperation.
Q: What about sample orders?
A: We are happy to provide you with samples. If needed, please contact us for more details. If we charge you for the sample, rest assured that the fee will be fully refunded when you place a formal order.
Q: Which shipping methods are available?
A: We offer multiple shipping methods such as sea freight, express delivery, and China Post Express for your choice. If you have other shipping needs or require a specific shipping route, please feel free to contact us.
Q: How long does it take for delivery/production and shipment?
A: The delivery time mainly depends on the quantity and complexity of your order. Typically, we can complete production and shipment within 5-10 working days. If you have special requirements, please inform us in advance so that we can arrange accordingly.
Q: My package is missing some products. What should I do?
A: We apologize for the missing products in your package. Please contact our support team immediately, and we will verify the package contents and resend the missing products to you as soon as possible. We apologize for any inconvenience caused.
Q: How do I confirm payment?
A: We accept payment methods such as telegraphic transfer and PayPal. Other payment methods are also acceptable. Please contact us before making payment through other methods. Additionally, a deposit of 30-50% is feasible, and the balance should be paid before shipment. Rest assured that we will ensure the security and smooth progress of the transaction.
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