A continuous reversing valve for one-way pipe string in layered oil production

Abstract

The invention relates to a layered oil recovery one-way pipe column continuous reversing valve and a method. According to the technical scheme, a fixation plate moves downwards under liquid pressure from a pipe column on the fixation plate, a suppressing cavity is closed through a starting valve, and meanwhile, a balancing valve in the balancing cavity moves upwards to achieve energy storage; whenthe liquid pressure of the pipe column is released, the balancing valve reversely moves to drive a closure plunger to move upwards to drive the starting valve to move upwards, the suppressing cavityis opened, a pressure relief valve moves downwards at this time, a pressure relief cavity is communicated with a starting cavity, and liquid of the pipe column enters a pipe column at the lower portion of a main body through a lower through hole; after the liquid is released, the pressure relief valve moves upwards, the lower through hole is sealed by the pressure relief valve, the pipe column onthe fixation plate can conduct suppression again through the liquid, the steps above are repeated, and therefore continuous reversing is achieved. The layered oil recovery one-way pipe column continuous reversing valve and the method have the advantages that the construction of oil recovery repeated continuous reversing can be completed by the single pipe column, the processes are greatly saved, the labor intensity and the operation cost are reduced, and the construction period is shortened.

Description

technical field [0001] The invention relates to an oil downhole control device, in particular to a one-way pipe string continuous reversing valve for layered oil production. Background technique [0002] In oilfield production, multi-layer is a common phenomenon. In many layers, the oil and water content of liquid is different. In order to improve efficiency, in oilfield production, ash injection, water blocking agent and chemical water blocking are required. Block the water layer and exploit the oil layer in order to improve the oil recovery rate, reduce the cost and increase the benefit. For multi-layer oil production, the non-target oil layer is blocked with bridge plugs in advance, and then any target layer can be exploited with this new process pipe string. , which can seal the unneeded production reservoirs and realize the oil production of the target layer of the oil well. At present, the patent number is 2013104715687, and the patent name is "a layered oil recovery d...

AI Technical Summary

Problems solved by technology

[0002] In oil field production, multi-level is a common phenomenon. In many layers, the oil-water content of liquid is different. In order to improve efficiency, in oil field production, it is necessary to inject ash, water shut-off agent, chemical water shut-off Block the water layer and exploit the oil layer in order to increase the oil recovery rate, reduce the cost, and increase the benefit. For multi-layer oil production, use the bridge plug to block the non-target oil layer in advance, and then use this new technology string to exploit any target layer. , which can seal the unneeded production reservoirs and realize the oil recovery of the target layer of the oil well. At present, the patent number is 2013104715687, and the patent name is "A Layered Oil Production Device". The problem of this device is: the one-way pipe string will produce reverse direction, but it cannot be reset. In actual production, it is necessary to use a pump to pump out the liquid in the pipe string, which cannot realize continuous reversing, which increases the operating cost. Difficulty and expense, reducing the efficiency of oil recovery

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