Layered mining pipe string of rock salt mine and a layered mining method of rock salt mine

A layered mining and rock-salt mine technology, applied in the direction of mining fluid, earthwork drilling, wellbore/well components, etc., can solve the problems of low mining speed and efficiency, complex downhole pipe strings, etc., to avoid interlayer interference and improve The effect of mining efficiency

Active Publication Date: 2020-11-10
SHANDONG INST OF GEOLOGICAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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  • Layered mining pipe string of rock salt mine and a layered mining method of rock salt mine
  • Layered mining pipe string of rock salt mine and a layered mining method of rock salt mine
  • Layered mining pipe string of rock salt mine and a layered mining method of rock salt mine

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Embodiment Construction

[0027] The invention will be further described below in conjunction with the accompanying drawings.

[0028]A pipe string for layered mining of rock salt mines, mainly including oil pipe 1, hollow rod 2, hollow pump 3, hollow mandrel 4, outer oil pipe 5, upper packer 6, inner oil pipe 7, flow channel conversion nipple 8, bridge The lower end of the oil pipe 1 is connected to the hollow pump 3, and the lower end of the hollow pump 3 is respectively connected to the outer oil pipe 5 and the inner oil pipe 7 through a double button joint, and the lower end of the outer oil pipe 5 is connected to the upper packer 6, The bridge channel 9, the lower packer 10, the upper packer 6 and the lower packer 10 are sealed on the inner wall of the casing 15, the lower end of the inner oil pipe 7 is connected to the flow channel conversion nipple 8, the outer oil pipe 5 and the inner oil pipe 7 The lowermost end continues to connect to the tubing 1 through a double-button joint, the side of th...

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Abstract

The invention discloses a rock salt mine layered-mining pipe string and a rock salt mine layered-mining method, and belongs to the technical field of rock salt mine mining. Through the rock salt minelayered-mining pipe string and the rock salt mine layered-mining method, the defect that the prior art lacks a layered water-injection huff and puff process pipe string and a related mining method torealize layered water-injection huff and puff mining of a rock salt mine is overcome. The rock salt mine layered-mining pipe string mainly comprises an oil pipe, a hollow rod, a hollow pump, a hollowjacking rod, an outer oil pipe, an upper packer, an inner oil pipe, a flow path conversion nipple, a bridge-type passage and a lower packer, the lower end of the oil pipe is connected with the hollowpump, the lower end of the hollow pump is connected with the outer oil pipe and the inner oil pipe through double fasteners correspondingly, the lower end of the outer oil pipe is sequentially connected with the upper packer, the bridge-type passage and the lower packer, the upper packer and the lower packer are sealed on the inner wall of a casing, the lower end of the inner oil pipe is connectedwith the flow path conversion nipple, the side face of the flow path conversion nipple is connected with the bridge-type passage, the hollow rod is arranged in the oil pipe in a sleeved mode, the lower end of the hollow rod continues to be connected with the hollow jacking rod through a hollow pump plunger, and a single-flow valve is mounted in the hollow jacking 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/28E21B43/14E21B43/20E21B43/11
CPCE21B43/11E21B43/14E21B43/20E21B43/28
Inventor 陈文韬杜圣贤刘凤臣
Owner SHANDONG INST OF GEOLOGICAL SCI
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