Abstract: A drilling apparatus that includes a formation fluid sampling and hydraulic testing tool for a drilling apparatus that includes a drilling string comprised of a drilling pipe and a drilling bit is provided. The tool is mounted on a string that comprises from top to bottom a pressure reduction valve, an expandible and collapsible packer bladder assembly, the sampling tool, and a lower expandible and collapsible packer bladder assembly, disposed between the drilling pipe and the drilling bit. Associated with the packer assemblies are pressure and vacuum storage devices for inflation and deflation respectively of the bladders of the packer assemblies.

Abstract: A formation fluid sampling and hydraulic testing tool for a drilling apparatus that includes a drilling string comprised of a drilling pipe and a drilling bit is provided. The tool has an outer tube disposed between the drilling pipe and the drilling bit. The outer tube is provided with a plurality of through holes for receiving formation fluid into the outer tube. An inner tube is disposed within, and spaced from, the outer tube to form an annular space between them. The inner tube is provided with a plurality of through holes that are adapted to communicate with the annular space. One end of the inner tube is connectable to a pumping mechanism for drawing formation fluid through the through holes of the outer tube and of the inner tube for the purpose of collecting a sample of the fluid and imposing a hydraulic stress on the formation. The through holes of the inner tube can be closed off or released.

Abstract: A formation fluid sampling and hydraulic testing tool for a drilling apparatus that includes a drilling string comprised of a drilling pipe and a drilling bit is provided. The tool has an outer tube disposed between the drilling pipe and the drilling bit. The outer tube is provided with a plurality of through holes for receiving formation fluid into the outer tube. An inner tube is disposed within, and spaced from, the outer tube to form an annular space between them. The inner tube is provided with a plurality of through holes that are adapted to communicate with the annular space. One end of the inner tube is connectable to a pumping mechanism for drawing formation fluid through the through holes of the outer tube and of the inner tube for the purpose of collecting a sample of the fluid and imposing a hydraulic stress on the formation. The through holes of the inner tube can be closed off or released.