To deal with the corrosion problem on the surface of the oil casing, cathodic protection technology should be used.

Black structural pipe refers to a structural pipe with a black oxide layer on its surface. The dark color comes from the iron oxide formed on its surface during the manufacturing process. When a steel pipe is forged, black oxide scale forms on its surface.

Seamless pipe fittings refer to pipe components made of seamless pipes. Seamless steel tubes are round, square, and rectangular steel materials with hollow sections and no seams around them.

Black galvanized pipe is a kind of pipe that coats the surface of ordinary black steel pipe or black iron pipe with a layer of zinc to improve its anti-corrosion performance.

Steel casing drilling uses octg casing instead of drill pipe to apply torque and bit pressure to the drill bit to achieve drill bit rotation and drilling.

Helical (screw) pipe piles, as the name suggests, are pile foundations made using a spiral hole-forming process. Different from traditional concrete pouring piles or steel structure piles, helical pipe piles are made of high-strength materials and made through special processing techniques, which have  longer service life.