1.What type of pipeline is used for oil?
There are two types of oil pipelines: carbon steel pipes and oil resistant rubber pipes. Now, most of the fixed oil pipelines we see are carbon steel pipes, and the oil resistant steel pipes play an important role in the temporary loading and unloading of the moving parts of oil transmission facilities. The carbon steel pipe can also be divided into seamless steel pipe and welded steel pipe according to the different manufacturing methods, and the
seamless steel pipe can also be divided into hot rolling and cold drawing.
2.What pipelines are used for oil and gas?
There are two main categories of pipelines used to transport energy products: petroleum pipelines and natural gas pipelines.
3.What are the three kinds of pipelines that carry oil?
There are two kinds of oil pipelines: crude oil pipeline and product oil pipeline.
4.What is the tubing size?
Tubing is measured by the OUTSIDE DIAMETER (O.D.), specified in inches (e.g., 1.250) or fraction of an inch (eg. 1-1/4″)
5.Can tubing use plastic tubing?
Yes. As a matter of fact, the oil guide pipe of many oil drums in use is plastic pipe.
6.What is oil field tubing?
Oil pipeline is a pipeline that transports crude oil and natural gas from oil and gas reservoir to the surface after drilling.
7.How do steel casing and tubing work together
The oil pipe is connected to the oil pipe hanger. The oil pipe is the innermost pipe. It extends directly underground, not connected with the casing, but inside the casing. To put it simply, the casing wraps the oil pipe and protects the oil pipe. The last layer of casing in the casing program of oil and gas well, from the wellhead to the bottom of the oil and gas layer. The depth of casing running is basically the depth of drilling.
Generally, the price of oil pipe is variable, and the price can be determined only by relevant technical parameters
The oil casing products of Baotou Steel Pipe Company can produce various steel grade oil casing according to the requirements. The products are successfully supplied to PetroChina, Sinopec and other users and exported to Indonesia, Thailand, Egypt, Venezuela, Russia, Turkey and other countries. In recent years, relying on the advantages of rare earth resources in Baiyun OBO mine of Baotou Iron and Steel Co., Ltd., we have independently developed and produced a series of varieties of oil well pipes for heavy oil thermal recovery wells, oil well pipes with high resistance to collapse, oil well pipes with resistance to hydrogen sulfide corrosion, and oil well pipes with resistance to CO2 corrosion. The products have been successfully applied to various major oil fields in China. In recent years, Baotou Steel Pipe Co., Ltd. has invested a lot of manpower and financial resources to develop special buckle products. In 2013, BT-1 special buckle was successfully developed, of which the specification is φ The 177.8 * 9.19mm P110 steel grade BT-1 special buckle has passed the physical evaluation test, and the product performance meets the design requirements.
11.Oil and gas pipelines: What’s the difference?
- Different power sources
Energy is also required, but the power sources of crude oil pipelines and natural gas pipelines are different. One uses centrifugal springs and the other uses compressors. The centrifugal spring is the heart of the crude oil arm: the channel, which can transport the oil from the oil tank or the oil from the upstream of the pipeline to the downstream with the design pressure increased. According to the needs, two pressurization modes can be adopted: multiple pumps in series or multiple pumps in parallel. The working characteristics of multiple pumps in series are the same displacement and the added head. The working characteristics of multiple pumps in parallel are the same head and the added displacement. The compressor is the power source of the natural gas pipeline, which can pressurize the gas from the upstream and send it to the downstream of the pipeline.
- Different temperature requirements
Similarly, the crude oil pipeline and the natural gas pipeline have different temperature requirements, one needs to be heated and the other needs to be cooled. The freezing point of domestic crude oil is generally high. Take Daqing oil field as an example, the freezing point of crude oil is about 27 degrees, which is much higher than the soil temperature around the pipeline (generally not higher than 6 degrees in winter). In order to prevent the crude oil from freezing and blocking during the transportation process, all crude oil pipelines in Northeast China need to set heating facilities along the pipeline to heat the crude oil to 70 degrees and exit the station, so as to ensure that the temperature at the downstream station is not lower than 33 degrees.
3. Different flow rate requirements
During the transportation of crude oil, it will exchange heat with the surrounding soil through the pipe wall and gradually approach the soil temperature. In order to avoid the condensation accident caused by slow flow rate and excessive temperature drop, the minimum transportation capacity of high pour point crude oil pipeline is generally set. The natural gas pipeline does not have problems related to low throughput. Instead, it is required that the flow rate should not be too fast, generally not more than 10m / s. If the natural gas flow rate is too fast, the friction between the natural gas and the pipe wall will obviously increase, and the pipeline vibration within the allowable stress range will be intensified, and the service life and operation safety of the pipeline will be affected.
4. Different pressure drop laws
Due to the existence of friction resistance, there is energy loss in the process of oil and gas pipeline transportation, and the pressure will decrease with the increase of transportation distance. However, the pressure drop laws of crude oil pipeline and natural gas pipeline are different, one is a straight line and the other is a parabola. The pressure drop range of crude oil pipeline is relatively uniform, which is in linear proportion to the transportation distance, and the average pressure is at 1 / 2 of the pipeline; The pressure drop of natural gas pipeline is generally slow first and then fast, and the pressure drop and the transmission distance form a parabolic law.
5. Elevation response is different
The long-distance oil and gas pipelines are all over the country, and the terrain they pass through varies greatly, including deserts, forests, plains and mountains. For mountainous areas with large elevation changes, the oil and gas pipelines are sensitive to terrain changes, one sensitive and the other slow. As the crude oil is dense and transported from high to low, the pressure in the pipeline decreases slowly or rises instead of decreasing. It is even necessary to set a pressure reducing station in the pipeline section with large local pressure difference to ensure that the liquid pressure in the pipeline does not exceed the design pressure of the pipeline. As the natural gas density is relatively small, the response of the natural gas pipeline to the elevation is relatively slow. When the elevation change range is less than 200m, it is generally not considered.
6. Different storage capacity
The capacity of oil and gas pipeline is fixed. Due to the different compression performance of liquid and gas, the corresponding pipe stock of crude oil pipeline and natural gas pipeline (i.e. the volume of the fluid in the pipeline converted to the standard atmospheric pressure) is different, which is fixed and changed one by one. The compression performance of crude oil is poor. The storage capacity of natural gas pipeline is increased due to the good gas compression performance of crude oil pipeline. It is also because of the compression performance of gas that the ability of natural gas to transmit pressure in the pipeline is weakened. Once a pipeline accident occurs, if no special measures are taken, it will often cause the pipeline to be torn for tens, hundreds or even kilometers. On the contrary, due to the poor compressibility of the liquid, the crude oil has a strong ability to transmit pressure in the pipeline. When the pipeline leaks, the pressure of the front and rear pipe sections will decrease rapidly, and the pipeline will not be broken for a long distance.
7. Different compatibility
After the completion of the crude oil pipeline and the natural gas pipeline, they are picky and tolerant of other resources. The crude oil pipeline is customized according to the physical properties of oil products. Different oil sources have their own physical properties of oil products. Generally, there are great differences in viscosity, freezing point, density, etc. different physical properties of oil products correspond to their respective optimal process schemes. Therefore, after the completion of the crude oil pipeline, the compatibility with other resources is poor. Once the oil source is changed, the whole pipeline system needs to be reformed or the process scheme needs to be adjusted. The heating furnace needs to be added for the low pour point oil pipeline to transport heavy oil, and the chemical drag reducer needs to be added for the conventional oil pipeline to transport heavy oil.
8. Different distribution forms
The pipeline is the link connecting the upstream resource areas and the downstream users. The resource areas corresponding to the crude oil pipeline and the natural gas pipeline are basically similar, but the downstream users are very different. One is wholesale and the other is retail. The crude oil pipeline transports crude oil from the oil field to the refinery. The refinery has special processing requirements for different oil products, and the pipeline also has corresponding conditions for different transport capacity and different physical properties of oil products. The pipeline has determined the corresponding refinery and year-on-year transport scale in the design stage, and it is basically unchanged after it is put into operation. It belongs to the wholesale distribution type with relatively stable downstream users.
9. Different stability
The stability of crude oil pipeline and natural gas pipeline is different, one is stable and the other is fluctuating. The upstream of the crude oil pipeline is an oil field and the downstream is a refinery, which is not affected by the season. Even during the maintenance and repair of the pipeline and the refinery, it will be adjusted by large oil tanks at the upstream and downstream to ensure the stable transportation of the pipeline and the normal production of the refinery, and the transportation volume is relatively stable.
10. Different environmental impacts
The long-distance oil and gas pipeline is a linear project, and it is inevitable to pass through nature reserves, water sources and other environmentally sensitive areas during the construction process. However, the impact of the crude oil pipeline and the natural gas pipeline on the environment is different, one serious and the other slight. Once the crude oil pipeline leaks, the light one will cause environmental pollution, and the serious one will cause fire, with very serious consequences. Even if there is a leakage accident in the natural gas pipeline, it will spread rapidly, and the impact on the surrounding environment is relatively small.
Therefore, while responding to the call to protect the environment and use clean and environment-friendly new energy, we should also be prepared to prevent dangers. For example, gas SCADA system should be used to do a good job in gas monitoring and management in stations such as gasification stations, and automobile drivers should do a good job in gas inspection to ensure personal safety and economic property are not damaged.
12.What is the difference between pipe and tubing?
Tubes can come in different shapes such as square, rectangular and cylindrical, whereas piping is always round. The circular shape of the pipe makes the pressure force evenly distributed. Pipes accommodate larger applications with sizes that range from a ½ inch to several feet.
13.What is tubing used for?
Tubing or tubes are hollow cylinders used for fluid transport, structural applications, or electrical sheathing. They are usually cylindrical in shape, but may have round, rectangular, or square cross-sections.