WELL COMPLETION SLIDING SLEEVE VALVE BASED SAMPLING SYSTEM AND METHOD

摘要

A well completion system includes tubing, and packers that seal the annulus of the well outside the tubing. The packers are spaced to define voids in the annulus that are substantially free from hydrostatic pressure. Also included are hollow sleeve valves having upper and lower sealing elements, and that have closed and open positions. Each sleeve valve is positioned within the tubing at a depth corresponding to a void in the annulus. Ports extend through the sleeve valve and tubing, so that when the sleeve valve is closed, the port is closed, and when the sleeve valve is open, the port is open. Also included is a sampling tool having top and bottom sealing elements, the bottom sealing element for engaging the lower sealing element of a sleeve valve, and the top sealing element for engaging the upper sealing element of the sleeve valve when the sleeve valve is open.