A layered mining pipe column for rock salt mine and a layered mining method for rock salt mine

Abstract

The invention discloses a rock salt mine layered mining pipe column and a rock salt mine layered mining method, and belongs to the technical field of rock salt mine mining. The defects that in the prior art, a layered water injection huff and puff process pipe column and a related mining method are lacked, so that layered water injection huff and puff mining of rock salt ore is not achieved are overcome. The pipe column mainly comprises an oil pipe, a hollow rod, a hollow pump, a hollow ejector rod, an outer oil pipe, an upper packer, an inner oil pipe, a flow channel conversion short section,a bridge type channel and a lower packer, wherein the lower end of the oil pipe is connected with the hollow pump, the lower end of the hollow pump is connected with the outer oil pipe and the inneroil pipe through double buckle connector, the lower end of the outer oil pipe is sequentially connected with the upper packer, the bridge type channel and the lower packer, the upper packer and the lower packer are arranged on the inner wall of a sleeve in a setting mode, the lower end of the inner oil pipe is connected with the flow channel conversion short section, the side face of the flow channel conversion short section is connected with the bridge type channel, the hollow rod is sleeved with the oil pipe, the lower end of the hollow rod is continuously connected with the hollow ejector rod through the hollow pump plunger, and a check valve is installed in the hollow ejector rod.

Description

technical field [0001] The invention belongs to the technical field of rock salt mine mining, and in particular relates to a layered mining pipe string for rock salt mines. Background technique [0002] At present, rock salt mines are mainly mined by water injection dissolution method. After the mining well is put into production, water injection dissolves the rock salt near the well to form a rock salt solution cavity filled with brine, and then the brine is pumped to the ground by an underground pump for subsequent treatment on the ground to complete a cycle. Mining, and then continue the mining process of circulating water injection and brine pumping. Since the downhole string needs to meet the two processes of water injection and brine pumping, that is, the process of water injection huff and puff, the downhole string is relatively complicated, and generally only single-layer mining can be carried out. However, multi-layer layered water injection huff and puff mining req...

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Problems solved by technology

[0002] At present, rock salt mines are mainly mined by water injection dissolution method. After the mining well is put into production, water injection dissolves the rock salt near the well to form a rock salt solution cavity filled with brine, and then the brine is pumped to the ground by an underground pump for subsequent treatment on the ground to complete a cycle. Mining, and then continue the mining process of circulating water injection and brine pumping. Since the downhole string needs to meet the two processes of water injection and brine pumping, that is, the process of water injection huff and puff, the downhole string is relatively complicated, and generally only single-layer mining can be carried out. However, multi-layer layered water injection huff and puff mining requires more complex downhole process strings, which cannot be realized at present. Therefore, it is only possible to block this layer after mining one layer, and then shoot and produce another layer. The overall production speed and less efficient

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