Large-diameter waterproof oil production packer and operation method thereof

Abstract

The invention discloses a large-diameter waterproof oil production packer and an operation method thereof. The large-diameter packer and a sealing insertion pipe are characterized in that a hydraulicsealing tool comprises an external hydraulic cylinder, a transition sleeve and a transition central spindle, wherein the hydraulic cylinder is arranged at the upper end of the transition sleeve and isused for separating a sealing pipe column after setting; the transition sleeve sleeves the transition central spindle and is used for connecting a setting anchoring mechanism; the lower end of the transition central spindle is connected with the large-diameter packer; the large-diameter packer comprises a first central pipe, wherein the upper end and the lower end of the first central pipe are respectively provided with a fine slip in the opposite direction; a plurality of rubber barrels are distributed on the first central pipe at intervals; a sealed intubation tube sleeves a second centralpipe and is used for being inserted into the large-diameter packer after successfully releasing the large-diameter packer. The oil production packer can effectively reduce the frequency of unsealing and replacing the packer caused by pump inspection, measure operation and other reasons, can realize one-time treatment in the effective period of the packer, can be repeatedly used in the effective period of the packer, and reduces the isolated production workload and the treatment cost.

Description

technical field [0001] The invention belongs to the technical field of oilfield casing damage well isolation treatment, and in particular relates to a large-diameter water-proof oil recovery packer and an operating method thereof. Background technique [0002] As the development time of the oil field has been extended, the casing has been perforated and ruptured due to corrosion and other reasons, and the number of wells connected to the oil and water layers has continued to increase, seriously affecting the normal production of the oil field and the effective use of production capacity. For low-production and low-efficiency wells, it is too costly to use casing subsidy or secondary cementing treatment measures, so such wells with casing damage generally adopt mechanical isolation, that is, a packer is set between the production layer and the water layer. [0003] At present, there are mainly two types of production isolation packers, one is the conventional production isola...

AI Technical Summary

Problems solved by technology

[0003] At present, there are mainly two types of production isolation packers, one is the conventional production isolation packer, the production isolation process of this type of packer is simple, but it needs to be unsealed every time the pump is inspected and repaired, and the validity period is short and The packer cannot be reused; the other type belongs to the long-life intubation packer. When checking the pump, the intubation only needs to be pulled out, and the packer does not need to be unsealed. The internal diameter is small, and it must be unsealed and taken out during the operation of the measures, and the cost of this type of packer is relatively high, and the construction process is complicated

Therefore, at present, these two types of packers used for production isolation cannot be reused after operation, resulting in a short effective period of isolation production for oil wells, frequent isolation production, and high treatment costs

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