| 摘要 |
<p>The device is intended for roller-expanding the profiled pipes which are mounted to close off well drilling complication zones, as well as to straighten distorted casing pipes. The device comprises a casing (1) and a roller-expanding element (3) mounted in bearings (4, 5) on a pivot journal (2) located on the casing (1) at an angle to the longitudinal axis of the latter. The roller-expanding element (3) consists of a spherical segment (9) whose external surface consists of interchanging sections of spherical surfaces (10) and lateral cylindrical surfaces (11), whose geometrical axes are located in a plane perpendicular to the axis (13) of the pivot journal (2).</p> |
