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.

During the cementing process, the well structure mainly consists of conduit casing, surface casing, intermediate casing, oil layer casing and cement rings outside each layer of casing.

The ASTM A252 is a standard specification for welded and seamless steel pipe piles issued by the American Society for Testing and Materials (ASTM International).

In order to ensure the quality of anti-corrosion coating on steel pipe pilings, this plan is prepared.