Center shaft for bridge plug, bridge plug and seat sealing method for bridge plug

Abstract

The invention discloses a center shaft for a bridge plug, a bridge plug and seat sealing for the bridge plug and relates to the technical field of engineering machinery. A technical problem that bridge plugs with large internal drift diameter cannot be made of degradable plastics and degradable metal material in the prior art can be solved. The center shaft for the bridge plug comprises a seat sealing dabber and a seat sealing pipe shaft, wherein the seat sealing pipe shaft is formed by an extrusion shoulder and a bearing trunk; the extrusion shoulder extrude a press ring of the bridge plug or a reducing supporting ring of the bridge plug; after a connection between the seat sealing dabber and a downstream end supporting body is removed, the seat sealing dabber can be extracted out of the center hole of the seat sealing dabber, so the center hole of the seat sealing dabber can form an internal fluid channel for the bridge plug; the strength of the material of the seat sealing dabber is greater than the strength of degradable material or corrosive material; and the material of the seat sealing dabber is degradable or corrosive material. The bridge plug comprises the center shaft for the bridge plug. Internal drift diameter of the bridge plug can be expanded; sealing effect of the bridge plug can be enhanced; and anchoring performance and construction convenience can be improved.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a central shaft for a bridge plug, a bridge plug using the central shaft and a setting method for the bridge plug. Background technique [0002] In the process of oilfield exploration and development, a temporary plugging process is needed to block the current production layer so as to implement technological measures for other production layers. After the process is completed, the temporary plugging is lifted to establish the flow between the production layer and the wellbore channel to realize the oil and gas production of oil and gas wells. Although the bridge plugging technology has been widely used in the reconstruction and development of fracturing measures. However, the applicant found that the prior art provides such figure 1 The bridge plug shown has at least the following technical problems: [0003] One is that the midway setting problem affects the no...

AI Technical Summary

Problems solved by technology

[0008] One of the objects of the present invention is to propose a central shaft for a bridge plug, a bridge plug using the central shaft and a setting method for the bridge plug, which solves the problem of The prior art has the technical problem that degradable plastics and degradable metal materials cannot be used to make bridge plugs with large internal diameters

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