Abstract: A formation fluid evaluation system (800) interconnected within a tubular string (818) for operation in a wellbore (802) having multiple zones (806, 808, 810). The evaluation system (800) includes a set of straddle packers (820, 822) that is operable to sequentially isolate the multiple zones (806, 808, 810). A test valve (824) is disposed between the straddle packers (820, 822). A fluid unloading assembly (828) is positioned uphole of the straddle packers (820, 822). The fluid unloading assembly (828) is operable to draw fluid (834) from the isolated zone (808) into the tubular string (818) through the test valve (824) in response to the circulation of a drive fluid down the tubular string (818). A formation evaluation instrument (836) is disposed within the tubular string (818) and determines a characteristic of the fluid (834) received from the isolated zone (808).

Abstract: A formation fluid evaluation system (100) interconnected within a tubular string (118) for operation in a wellbore (102) having multiple zones (106, 108, 110). The evaluation system (100) includes a pair of straddle packers (120, 122) that isolates one zone (108) of the multiple zones (106, 108, 110), a test valve (124) disposed between the straddle packers (120, 122) and an upper packer (126) positioned uphole of the uppermost zone (106) of the multiple zones (106, 108, 110). A fluid lift assembly (128) is position uphole of the upper packer (126). The fluid lift assembly (128) is operable to draw fluid (134) from the isolated zone (108) into the tubular string (118) through the test valve (124). A formation evaluation instrument (136) is disposed within the tubular string (118) and determines a characteristic of the fluid (134) received from the isolated zone (108).

Abstract: A system and method for controllably separating a conduit into an upper portion and a lower portion. The system includes a first valve in the upper portion of the conduit above a point of separation, and a second valve in the lower portion of the conduit below the point of separation. When the conduit is separated, the valves are actuated to cease flow therethrough and prevent loss of fluids into the seawater. A hang-off tool in the lower portion of the conduit engages the well and supports the lower portion of the conduit.

Abstract: An annulus pressure responsive tool of the type which contains lateral circulation ports and a ball valve, each operable between open and closed positions to configure the tool into different modes of operation. These modes include a well test position in which the ball valve is open and the circulation ports are closed, a blank position in which the ball valve and circulation ports are both closed, and a circulating position in which the ball valve is closed and the circulating ports are open. Through manipulation of annulus pressure, the tool mode can be changed during the annulus pressure release to move out of the well test position and into the blank and circulating positions. An operating mandrel assembly is slidably disposed within the exterior housing of the tool and its movement dictates the positions of both the circulation ports and the ball valve.