Separated layer water injection string for petroleum exploitation and water injection process thereof

Abstract

The invention provides a separated layer water injection string for petroleum exploitation and a water injection process thereof. The separated layer water injection string for petroleum exploitationcomprises a casing pipe and an oil pipe. A plurality of packers are arranged in the casing pipe in a packer sealing mode from top to bottom in sequence. The top of the oil pipe is connected with a tubing hanger. The bottom of the oil pipe penetrates through all the packers in sequence and is connected with a circular plug. An insertion seal is arranged between the oil pipe and each packer. A hydraulic safety joint is arranged in the position, above each packer, of the oil pipe. A water distributor is arranged in the position, below each packer, of the oil pipe. A circulating sliding sleeve isarranged between the hydraulic safety joint at the upper end of the oil pipe and the tubing hanger. Through the separated layer water injection string for petroleum exploitation, separated layer waterinjection can be realized; after the string gets blocked, casing milling and salvaging measures can be taken; and the problem that the separated layer effective period is shortened due to shaking ofan existing water injection string is solved.

Description

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AI Technical Summary

Benefits of technology

This technology allows for efficient use of space during drilling operations while also allowing layers of different types of fluids (water or oil) to flow through without being affected due to vibrations. It achieves this by providing separate sections on pipes called pressure safety releases devices at specific locations along their length. These technical improvements make it easier and more reliable when trying to rescue damaged equipment quickly after they have been severely blocked downhole.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving the efficiency at which hydrocarbon production occurs through an improved method called fluid separation or liquid distribution (FLD). By separating fluids from each other before they enter into pipes that carry them back upstream without causing damage, these methods can improve overall performance while reducing costs associated with constructing new facilities.

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