why is steel casing pipes

Steel casing pipes are mainly used in drilling well or any underground installation. Petroleum steel casing pipe is the important equipment in petroleum drilling including drill pipe, core barrel and casing pipe, drill collar as well as small diameter drilling with steel tube etc. Domestic steel casing pipe is made with geological drilling steel through hot rolling and cold-drawing, the steel grade is indicated by “geological (DZ)”. API Spec 5CT specification is for casing and tubing, petroleum and natural gas industries for drilling welds with casing and tubing. Casing pipes are applied in casing oil & gas wells. A larger diameter pipe is assembled and is inserted into a drilled section of a bore-hole.

Why is Steel Casing Pipes Done?
★Prevent contamination of fresh water;
★Provide stronger upper foundation for dipper drill;
★Enable smooth bore for installing equipment;
★Seal high pressure zone surface to ward from getting blown off;

Steel casing tube is a kind of pipe to support oil and gas well sidewall to guarantee the drilling process and the whole oil well normal operation after drillings. According to different drilling depth and geological condition, each well uses several layers casing tube. Different from the oil pipe and drilling pipe, steel casing pipe is the one-time consumption materials without repeating using, so it adopts cement to fasten oil well. Therefore, the consumption of casing pipe is accounted for more than 70% of the total oil well pipe.

steel casing pipes

Benefits of Steel Casing Pipes
The steel for casing tube manufactured is smelted in the electric furnace by synthetic slag and cast by continuous casters. The process ensures the achievement of chemically pure steel with reference to sulphur and phosphor contents offering high tensile, ductility and corrosion resistance properties of tubes to be operated at low temperature in various corrosion media. Casing tubes are heat treated in a computerized walking beam furnace.

Steel grade and heat treatment system applied allow high strength pipe to be obtained. Steel casing pipes and tubing are used in furnishing and installing cased tunnels, where they indicate to pass other utilities or obstructions without open excavation. Corrosion proofing water based paint is application in the outside pipe surface to protect against atmospheric corrosion during transportation and storage. The casing tubes can be delivered with metal or composite caps at booth ends for thread protection.

Casing tube grades: H40, J55, K55, N80, L80, C90, T95, P110, Q125 etc.
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