“casing head”可以造什么句，casing head造句

This paper introduces the structure, working principle, strength, installation operation and popularization of the new casing head.

This article presented the research on matching technology of casing head and gas-producing wellhead for guaranteeing the safety of drilling and production test operation.

It can be used for tubing fracturing, annulus fracturing and combination fracturing with casing head and fittings.

For improving need assembling the casing head, the cutting casing pipe on project, we have designed the device of cutting casing head to change unfavorable factors using acetylene gas to cut case.