| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a water stop packer recoverable and easily mountable and a water stopping method for well. SOLUTION: This water stop packer comprises a shaft body, an upper plate member and lower plate member water-tightly fixed to the shaft body substantially orthogonally to the long axis of the shaft body with a long axial directional space, a cylindrical flexible membrane body the upper end and lower end of which are water-tightly connected to the whole circumference of the outer edge of the upper plate member and the whole circumference of the outer edge of the lower plate member, respectively, a piping connecting port provided on the upper plate member, and a piping connecting port provided on the lower plate member when required. This packer may be provided with an insert port formed of opening parts provided on the upper plate member and lower plate member and a cylinder for mutually connecting the opening parts, the upper end and lower end of which are water-tightly connected to the whole circumference of the opening part of the upper plate member and the whole circumference of the opening part of the lower plate member, respectively.</p> |
