| 摘要 |
<p>The invention relates to a hydraulic device for suspending-operating the concentric double string of production pipes, used for controlled advance and/or upwards or downwards simultaneous operation of two concentric strings of production pipes upon the well exploitation. According to the invention, the hydraulic device for suspending-operating the concentric double string of production pipes, provides the supporting and the upward or downward operation of two concentric strings of production pipes, concomitently with a simultaneous fluid circulation from the surface into the well and from inside the well up to the surface, by that, its cylindrical body (1) has a threaded portion inside for supporting a metallic piece (4) wherein there is suspended a string of pipes (5) of small diameter, through a connection piece (6). Above the connection piece (6) there is screwed a part (9) provided with a bend (10), for discharging the circulation fluid. At the lower side, the cylindrical body (1) is integral with a piece (9), which has the role of supporting the weight of the string of production pipes (12) of large diameter through another connection part (13) sliding vertically, the sealing between the circulation directions of the circulation fluid which penetrates into the device through a tap (2) located towards the upper side of the cylindrical body (1), on the generatrix thereof, there being made with a ring (14) a rubber gasket (15) and a sealing ring (16). In the situation of being used as pumping head, at the lower part of the cylindrical body (1), the hydraulic device for suspending-operating a double concentric string of production pipes has a piece (17) which has a connecting flange (18) at the landing head and a connection flange (19) at the mixing line.</p> |
