Surface casing1、Used to seal the upper unstable loose, collapse-prone and leaky formations and water layers.2、Installation of wellhead device to control well blowout.3、Support part of the weight of technical casing and oil layer casing. The depth of the surface casing down depends on the specific situation, usually a few dozen meters to a few hundred meters […]
In the overlapping area of coal and oil and gas resources, due to the deeper oil deposits, the oil wells penetrate the coal strata, and the secon-hand oil well casing acts on the deformation and damage of the working site, changing the original mechanical state of the roof. At present, the phenomenon of toxic and […]
Petroleum casing emerged not only for oil extraction but also as a pipeline for transporting raw materials. In order to strengthen the quality of petroleum casing, every link in the production process is particularly important, especially the temperature control during the period, which must be mastered in strict accordance with the regulations. Usually, the petroleum […]
Oil casing is a steel pipe used to support the well wall of oil and gas wells to ensure that the drilling process is carried out and that the entire well operates properly after completion. Several layers of casing are used in each well depending on the drilling depth and geological conditions. The casing is […]
Different types of casing used in the oil recovery process: surface oil casing – protects the drilling well from contamination by shallow water and gas formations, – supports the wellhead equipment and maintains the weight of other layers of the casing. Technical casing – separates the pressure in the different layers to allow proper flow […]
Oil casing is an important equipment for oil drilling, and its main equipment includes drill pipe, core pipe and casing, drill collar and small diameter steel pipe for drilling. The domestic casing is made of geological drilling steel by hot rolling or cold drawing, and the steel number is “geological” (DZ), and the common casing […]
Oil casing is a steel pipe used to support the well wall of oil and gas wells to ensure that the drilling process is carried out and that the entire well operates normally after completion. Several layers of casing are used in each well according to different drilling depths and geological conditions. The casing is […]
Oil casing is the lifeline to maintain the operation of oil wells. Due to different geological conditions, the state of downhole stress is complex, and the combined effects of tensile, compressive, bending and torsional stresses act as Zhixin Group for the pipe body, which puts high demands on the quality of the casing itself. Once […]
When the well is drilled to the destination layer (oil and gas-bearing layer), the oil layer casing is needed to seal the oil and gas layer and the upper exposed strata, and the oil layer is inside the casing. The oil layer casing is the deepest among all types of casing, and its mechanical properties […]
Oil and gas wells are fixed assets of an oil and gas company, and the formation casing is the most basic element of an oil and gas well. Once the oil formation casing is damaged and cannot be repaired, it means the scrapping of the oil and gas well and the loss of fixed assets. […]
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