Coiled tubing actuated sampler.

摘要

A coiled tubing conveyed sampling apparatus (40) includes an actuator housing (44,46) having a housing interior (80) and having a proximal housing end (82) including a connector (84) for connecting the housing to a coiled tubing string (30) so that a tubing bore (100) of the coiled tubing string is communicated with the housing interior. A one-way check valve (114) is disposed in the housing interior (80) and allows well fluid from the well bore to fill the tubing bore (100) of the coiled tubing string as the sampling apparatus (40) is run into the well. The check valve (114) isolates the tubing bore (100) of the coiled tubing string (30) from the well when pressure in the tubing bore (100) exceeds pressure in the well. A sampling tool is attached to a lower end of the actuator housing (46). A pressure responsive actuator (92,94,120,114) is disposed in the housing interior (80) and actuates the sampling tool in response to pressure in the tubing bore (100) of the coiled tubing string (30) exceeding pressure in the well by a first predetermined value so that a well fluid sample is drawn into the sampling tool and trapped in the sampling tool. The apparatus is especially useful in taking samples from horizontal portions of highly deviated wells. <IMAGE> <IMAGE>