| 摘要 |
<p>A circumferential sampling tool for obtaining samples from an interior wall of a tube has a cylindrical body, a shaft disposed in the cylindrical body, a first cutter, a second cutter being disposed at an angle to first cutter, a third cutter, and a fourth cutter being disposed at an angle to the third cutter. The first, second, third and fourth cutters are operatively connected to the shaft for rotation therewith. Each of the cutters is movable radially between a retracted and an extended position in response to rotation of the shaft in order to obtain samples from the tube. A method of obtaining samples from an interior wall of a tube is also disclosed.</p> |
