| 摘要 |
<p>A FORMATION TESTER TOOL (10) CAN INCLUDE A LONGITUDINAL PROBE DRILL COLLAR (12) HAVING A SURFACE, A FORMATION PROBE ASSEMBLY (50) LOCATED WITHIN THE PROBE DRILL COLLAR (12), THE FORMATION PROBE ASSEMBLY (50) INCLUDING A PISTON (96) RECIPROCAL BETWEEN A RETRACTED POSITION AND AN EXTENDED POSITION BEYOND THE PROBE DRILL COLLAR (12) SURFACE, THE PISTON (96) BEING SLIDINGLY RETAINED WITHIN A CHAMBER (94), A SEAL PAD (180) LOCATED AT AN END OF THE PISTON (96), THE SEAL PAD (180) INCLUDING AN OUTER SURFACE DEFINING A PARTIAL CYLINDRICAL SURFACE. THE PISTON (96) INCLUDES AN OUTER SURFACE HAVING NON-CIRCULAR CROSS-SECTIONAL SHAPE AND THE CHAMBER (94) INCLUDES AN INNER SURFACE HAVING A NON-CIRCULAR SHAPE SIMILAR TO THE SHAPE OF THE PISTON (96) OUTER SURFACE. THE FORMATION TESTER TOOL (10) CAN INCLUDE INTERCHANGEABLE DRAW DOWN ASSEMBLIES (70) AND A FLOW BORE (14) HAVING A CURVING PATH. THE MOST ILLUSTRATIVE DRAWING IS:</p> |
