| 摘要 |
<p>A well comprising a body (1) and at least one fitting (2) for connecting a pipe to the well. The fitting (2) is provided with an inner sheath (4) which is directed towards the inside of the body (1) and which is provided with internal connection surfaces (4a, 4b) for connecting the pipe in connection with the well. Inner diameters of the connection surfaces (4a, 4b) are different in size for connecting pipes of different sizes to the fitting (2). The connection surfaces (4a, 4b) having different inner diameters are arranged successively in an axial direction of the fitting (2) such that a connection surface (4b) having the smallest diameter resides closest to a centre part of the well while a connection surface (4a) having the largest diameter resides farthest away from the centre part of the well.</p> |
