| 摘要 |
PURPOSE:To seal corroding liquid in a tubular material and to prevent the corroding liquid from leaking to the outside of the tubular material, by screwing the outside circumferential surfaces at both ends of said material into the inside circumferential surfaces of a pair of cap nutlike chucks. CONSTITUTION:The outside circumferential surfaces at both ends of a steel pipe 1 are screwed into the inside circumferential surfaces 2a, 3a of a pair of cap nutlike chucks 2, 3, and are gripped with the annular end face 1b of the steel pipe 1 and the chucks 2, 3. Packings 4 are interposed between the end face 1b and the bottom surfaces 2b, 3b of the chucks 2b, 3b to seal between the end face 1b and the surfaces 2b, 3b. Outside circumferential grooves 5 are formed on the surface 1b, and the packings 4 are inserted into the grooves 5. Corroding liquid is sealed in the pipe 1. The pipe 1 is subjected to a corrosion test; at the same time, the pipe is heated in an electric furnace 15 and receives the tensile load applied from a loading mechanism 8, and the pipe receives the internal pressure by the corroding liquid. Thus, the using condition of the steel pipe in an actual oil well is reproduced and a simulation test is carried out. |
