| 摘要 |
A delayed opening fluid sampling tool comprises a body having three chambers and a port defined therein. The tool also comprises a metering device which is disposed in the body between two of the chambers, one of which chambers is for holding a metering fluid and the other of which is for receiving fluid which is transferred through the metering device. The tool further comprises a valve which is disposed in the body between the port and the remaining chamber, which remaining chamber is for receiving a well fluid sample. The valve is moved relative to the body in response to pressure acting on the valve through the port. Only after a predetermined time delay after the pressure begins moving the valve is the valve positioned to communicate the port with the sample-receiving chamber.
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