| 摘要 |
A device for use in recovery of gas trapped by fluid and suspended solids in a gas or oil well, the device comprising a body defining a cavity with a cap at its upper end and an opening for entry of fluid at its bottom end, the device including a lower valve for controlling flow of fluid into the cavity and an upper valve for controlling flow of the fluid and suspended solids out of the cavity, the cap having a plurality of lines passing therethrough and into the cavity, the lines comprising: a) a gas line for provision of a stream of pressurized gas to push downward on fluid in the cavity in a compression stroke which closes the lower valve and opens the upper valve, the gas line further used to exhaust gas from the cavity during an exhaust stroke when infiltration of fluid into the cavity raises the fluid level in the cavity; b) an effluent line to allow exit of the fluid and suspended solids during the compression stroke; and c) a probe line for provision of electrical power to a pair of probes for initiating and halting entry of the stream of pressurized gas into the cavity. |
