| 摘要 |
The present invention relates to a valve system for use in a wellbore, comprising a side pocket mandrel, where the side pocket mandrel comprises an elongated body section, the elongated body section being provided with a substantially fully open main bore for alignment with a well tubing and a laterally offset side pocket provided with a bore. The substantially fully open main bore and the laterally offset side pocket bore are divided by an internal wall. At least one through opening is provided in the side pocket mandrel, leading into the side pocket bore, and at least one through opening is provided in the internal wall, leading into the main bore, where the at least two openings are in fluid communication through the side pocket bore. Said side pocket bore includes at least two valves are arranged in series to form a double fluid barrier between the main bore and an outside of the pocket mandrel, the at least two valves being independently retrievable through at least one installation opening arranged in the internal wall of the side pocket mandrel. |
