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Overview of the import and export of oil casing tubes
2021-11-18 10:47:28

The oil casing pipe is a large-diameter pipe that acts as a fixed oil and gas well wall or wellbore. The casing pipe is inserted into the wellbore and fixed with cement to prevent the wellbore from separating the formation and the wellbore from collapsing, and to ensure that the drilling mud circulates for drilling. Different types of casing pipe used in oil extraction:

The surface oil casing pipe is to protect the well from being contaminated by shallow water and shallow gas layers, supporting the wellhead equipment and maintaining the weight of the other layers of the casing pipe.

The technical oil casing pipe is to separate the pressures at different levels so that the drilling fluid can flow normally and protect the production casing pipe to install the anti-burst device, the leakage prevention device and the tail pipe in the drilling.

The oil layer oil casing pipe mainly exports oil and natural gas from the subsurface storage layer to protect the drilling and stratify the drilling mud. When producing oil casing pipe pipe, the outer diameter is usually 114.3 mm to 508 mm.

The main importing countries of oil casing pipe pipe are: Germany, Japan, Romania, Czech Republic, Italy, Britain, Austria, Switzerland, the United States, and Argentina and Singapore. The import standards refer to the American Petroleum Institute standards API5A, 5AX, 5AC. The steel grades are H-40, J-55, N-80, P-110, C-75, C-95 and the like. The specifications are mainly 139.77.72R-2, 177.89.19R-2, 244.58.94R-2, 244.510.03R-2, 244.511.05R-2 and the like.

The API has three lengths: R-1 is 4.88 to 7.62 m, R-2 is 7.62 to 10.36 m, and R-3 is 10.36 m to longer. In addition to adopting API standards, there are a small number of Japanese factory standards (such as Nippon Steel, Sumitomo, Kawasaki, etc.) imported from Japan. The steel grades are NC-55E, NC-80E, NC-L80, NC-80HE. Wait.

Some imported goods are marked with the word LTC, namely the filament sleeve. In the case of the claim, there have been problems such as black buckle, thread damage, tube folding, broken buckle and thread tight distance, and the appearance of defects such as J-values of the coupling and the inherent quality problems such as casing pipe cracking and low yield strength.