| The role, standards, and scope of application of petroleum pipes |
| Introduction: | Petroleum pipe (GB948-88) is a seamless steel pipe suitable for furnace pipe, heat exchanger and pipe in petroleum refinery. Geological drilling steel pipe (YB235-70) is a steel pipe used by geological departments for core drilling. It can be divided into drill pipes, drill collars, core pipes, casings, and settling pipes according to its purpose.
Oil pipe is a long steel strip with a hollow cross-section and no joints around it, causing oil cracking
Chemical pipe is an economical cross-section steel. |
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| Application: | Widely used in the manufacturing of structural and mechanical components, such as petroleum drill pipes, automotive transmission shafts, bicycle frames, and steel scaffolding used in construction mobile images. Manufacturing circular parts using petroleum cracking pipes can improve material utilization, simplify manufacturing processes, save materials and processing time, such as rolling bearing rings, jack sleeves, etc. Steel pipes have been widely used for manufacturing. Petroleum cracking tubes are also indispensable materials for various conventional weapons, and barrel and barrel are all manufactured using petroleum cracking tubes. Petroleum cracking pipes can be divided into circular pipes and special-shaped pipes according to the shape of their cross-sectional area. Due to the fact that under conditions of equal circumference, the area of petroleum cracking pipes is the largest, and circular pipes can transport more fluids.
Seamless steel tubes for petroleum cracking (GB9948-88) are seamless steel tubes for furnace tubes, heat exchangers and pipes in petroleum refinery.
Oil drilling pipe (YB28-65) is a seamless steel pipe used for internal or external thickening at both ends of oil drilling. Steel pipes are divided into two types: threaded and non threaded. The threaded pipe is connected with a joint, while the non threaded pipe is connected with a tool joint using a butt welding method. |
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| Classification: | API: It is the abbreviation of American Petroleum Institute in English, which means American Petroleum Institute in Chinese.
OCTG: It is the abbreviation for Oil Country Tubular Goods in English, which means petroleum specialized pipes in Chinese, including finished petroleum casing, drill pipe
Drill collars, couplings, shorts, etc.
Tubing: Pipe used in oil wells for oil, gas, water injection, and acid fracturing.
Casing: A pipe that is inserted from the ground surface into the drilled hole as a lining to prevent collapse of the wellbore.
Drill pipe: Pipe used for drilling holes.
Pipeline pipe: a pipe used for transporting oil and gas.
Coupling: A cylindrical body used to connect two threaded pipes with internal threads.
Sieve material: a pipe used for manufacturing couplings.
API thread: Pipe thread specified in API5B standard, including tubing round thread, casing short round thread, casing long round thread, casing trapezoidal thread, and pipe
Thread of pipeline, etc.
Special buckle: Non API threaded buckle type with special sealing performance, connection performance, and other properties.
Failure: The phenomenon of losing its original function due to deformation, fracture, or surface damage under specific service conditions. The main forms of oil casing failure are:; Damage, slipping, rupture, leakage, corrosion, adhesion, wear, etc. |
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| Standard: | API 5CT: Specification for Casing and Tubing
API5D: Drill Pipe Specification
API 5L: Specification for Pipeline Steel Pipe
API 5B: Specification for Processing, Measurement, and Inspection of Threads for Casing, Tubing, and Pipeline Pipe
GB/T 97111: Technical delivery conditions for steel pipes for petroleum and natural gas industries - Part 1: Grade A steel pipes
GB/T 9711.2: Technical delivery conditions for steel pipes for petroleum and natural gas industries - Part 2: Class B steel pipes
GBT97113: Technical delivery conditions for steel pipes for transportation in the petroleum and natural gas industries - Part 3: C steel pipes |
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| Corrosion protection: | Many major oil fields in China have entered a period of medium to high water content development. With the continuous increase of comprehensive water content, the corrosion of oil and gas collection systems is becoming increasingly severe, which has become an impact on the reliability of pipeline systems
And the key factor in service life, which is the main cause of early pipeline accidents. Due to the presence of a large amount of corrosive substances such as CO2, H2S, C-small amounts of dissolved oxygen and bacteria in dry crude oil
The impact of all these factors and their interactions will inevitably lead to severe corrosion of oil pipes, posing a serious threat to the safety of oilfield production.
Petroleum pipeline anti-corrosion
The commonly used anti-corrosion methods for well pipes include nitriding, hydrogen ring powder spraying, titanium nano spraying, carbon zirconium coating, PE pipe lining, fiberglass tubing, etc. The price of PE pipe lining is relatively high, which is difficult for the market to accept. Other anti-corrosion methods belong to low-end anti-corrosion technology, with unstable production and unsatisfactory anti-corrosion effects, lacking competitiveness. Fiberglass lined oil pipes have mature and reliable technology, moderate price, and strong market competitiveness. The anti-corrosion technology of fiberglass lining has the characteristics of lightweight, high strength, corrosion resistance, and is not corroded by oil, water, salt, and other media. Moreover, its water surface can reduce the adhesion of ground ions. At the same time, its internal surface is smooth, improving the flow state of the pipe and reducing the probability of scale crystals adhering to the pipe wall. Since its application in the inner lining of oil and gas equipment in the 1960s, it has been successfully applied in oil pipes, casings, gathering and transportation pipelines, reinjection pipelines, outlet pipelines, and pipelines.
Anticorrosive clock lining system:
The internal anti-corrosion lining system for oil field steel pipes and pipelines is manufactured using an embedded lining process using filament wound composite materials or extruded thermoplastic.
A corrosion-resistant material is formed inside the steel pipe, which can isolate corrosive liquids and gases used in oil from the steel pipe.
The replacement cost of damaged bottomhole production tubing or subsea flowlines is very high. Duole can provide excellent corrosion resistance protection in extremely harsh environments, which other products cannot. Compared to spray coatings with shorter durability, Duole not only has cost-effectiveness but also excellent performance at full moon. At present, high-performance systems are widely used in a wide range, and before that, in high-temperature or acidic bottomhole environments, people used low-cost corrosion-resistant alloys.
The product can be installed into threaded oil field fittings through almost any connection. |
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| Advantages: | Working at a temperature of 250 ℉;
CO2/water injection/treatment;
Chemical treatment;
Gas production;
Compatibility with AP | or PREMIUM threads:
35 years of on-site experience;
Lower cost than corrosion-resistant alloy materials:
Long term/durable anti-corrosion protection;
A comprehensive corrosion protection system in the market;
Durable lining system;
Corrosion-resistant oilfield pipes can be used for seawater injection or treatment of saline water and other corrosive liquids that deteriorate the environment. |
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