| 摘要 |
An improved safety device, for oil and gas installations, includes one or more conduits for the transport of oil and/or gas, and one or more valves, where the safety system includes a freezing device, which can be provided substantially around a conduit and/or a valve, where the freezing device cools the conduit and/or valve in such a way, preferably by using liquid nitrogen of freon, that the medium in the conduit and/or the valve freezes. |
| 主权项 |
1. A safety device for an oil and gas installation, which installation comprises one or more conduits for the transport of oil and/or gas, and/or one or more valves, wherein the safety device comprises:
a first freezing device for forming a closing ice plug, which first freezing device is configured to: spray a freezing medium into the conduit and/or into the valve, and/or spray a freezing medium around the conduit and/or around the valve; and a second freezing device for maintaining the closing ice plug; wherein the first freezing device is substantially positioned in and/or around the conduit and/or the valve; wherein, in operation of the safety device, the first freezing device cools the conduit and/or the valve to such an extent that a closing ice plug is formed in the conduit and/or the valve; and wherein the second freezing device comprises a closed conduit device for transporting a freezing medium, such that, in operation of the safety device, during a first time period the freezing medium is sprayed by the first freezing device in order to form the closing ice plug and that during a second time period the formed closure is maintained by the second freezing device, and wherein during the second period the spraying of the freezing medium is halted. |
