Patent ID: 6167962
Filing Date: 2001-01-02
Classification: E21B,G01N

Abstract:
A bailer, comprising: an elongate main body having a hollow interior; said elongate main body having an uppermost end and a lowermost end; a one-way valve means positioned within said hollow interior near said lowermost end thereof to admit liquid into said hollow interior when said bailer is lowered into a liquid and to prevent leakage of said liquid from said hollow interior when said bailer is lifted from said liquid; a first weight means secured to said uppermost end of said main body; and a second weight means secured to said lowermost end of said main body; said top and bottom weight means being mounted externally of said hollow interior; whereby liquid collected within said hollow interior is not contaminated by said weight means; whereby said weight means does not form an obstacle to the free flow of liquid into said hollow interior; whereby said bailer is inserted into a liquid at an insertion rate that is faster than insertion rates for bailers lacking said top and bottom weight means; and whereby said bailer has minimal wobble about its longitudinal axis when it is lowered so that it does not become lodged against ridges formed by misaligned pipes.