| 摘要 |
An apparatus and method are disclosed for obtaining samples of pristine formation fluid, using a work string (6) designed for performing other downhole work such as drilling, workover operations, or re-entry operations. An extendable element (24, 26, 45) extends against the formation wall to obtain the pristine fluid sample. While the test tool (16) is in a standby condition, the extendable element (24, 26, 45) is withdrawn within the work string, protected by other structure from damage during operation of the work string (6). The apparatus is used to sense downhole conditions while using a work string (6), and the measurements taken can be used to adjust working fluid properties without withdrawing the work string (6) from the bore hole (4). When the extendable element (24, 26, 45) is a packer (24, 26), the apparatus can be used to prevent a kick from reaching the surface, adjust the density of the drilling fluid, and thereafter continuing use of the work string.
|
