| 摘要 |
<p>PURPOSE:To permit the static pressure of water to be measured exactly by providing a pressure-detecting opening in the direction of right angle in the tip portion of a packer. CONSTITUTION:A pressure-detecting opening 3 is formed in the direction of right angle to the centerline in the tip portion of a packer 10 having a water- passing tube 12 and a rubber tube 16. A pressure transmission path 32 leading to the opening 30 is also provided to the basal end 20 of the packer. The static water pressure alone on a test base line can thus be exactly measured without affected by the dynamic pressure caused by water injection.</p> |
