Intelligent well cementation slide sleeve separate-layer fracturing transformation process pipe column without stage limitation

Abstract

The invention discloses an intelligent well cementation slide sleeve separate-layer fracturing transformation process pipe column without stage limitation. The pipe column is designed for realizing the separate layer transformation of a straight well of an oil-gas well without stage limitation and meeting the process requirements of multi-stage fracturing transformation of oil-gas fields, the pipe column is arranged in a cement ring, the upper end of the pipe column is connected with a well opening, the pipe column consists of multi-stage intelligent well cementation slide sleeves, a floating hoop and a floating shoe, the multi-stage intelligent well cementation slide sleeves are connected through a sleeve, and the floating hoop and the floating shoe are arranged at the tail end of the pipe column. A piston is arranged in the intelligent well cementation slide sleeve cavity, an upper tube body is provided with a radial fracturing end opening, and a hydraulic pipeline for communicating a two-position four-way electromagnetic valve, a battery, a wireless sensing receiving device, an antenna, a water tank, an upper cavity of the tube body and a lower cavity of the tube body is buried in a groove formed in the tube wall of the lower tube body. The pipe column has the advantages that the separate-layer fracturing transformation without stage limitation can be realized, the construction period can be greatly shortened, the cost is saved, the international products can be replaced, the drilling work intensity can be reduced, electronic balls can be directly thrown for opening the first layer well cementation slide sleeve, the perforation is not needed, after the fracturing completion, all slide sleeves can be opened through ball throwing, the full through diameter can be realized, and the drilling and grinding well control risk can be reduced.

Description

technical field [0001] The invention relates to an intelligent cementing sliding sleeve layered fracturing transformation process string with unlimited stages, and belongs to the technical field of multi-stage layered fracturing transformation of oil and gas wells. Background technique [0002] At present, there are two main types of multi-stage fracturing reconstruction methods for cased wells in domestic oilfields: one is to use cable perforation and mechanical packers to achieve isolation between layers, and to complete multi-stage fracturing stimulation by sequentially opening the fracturing sleeves; The second is to use hydraulic jet fracturing tools to carry out hydraulic jet perforation, realize interlayer isolation through the hydraulic jet effect, and complete multi-stage reconstruction of jet fracturing; the above-mentioned pipe string is completed by using sealing balls from small to large when segmenting Opening of sliding sleeves (sand blasters) at all levels an...

AI Technical Summary

Problems solved by technology

Due to the limitations of the design dimensions of the wellhead, wellbore, construction string and tools, even if the above technologies are continuously optimized and perfected, only a limited number of stages of layered fracturing can be completed

At the same time, the above-mentioned pipe string adopts the integrated technology of fracturing and production, and generally does not have the functions of controlled and selective mining in the later stage

[0003] With the development of oil and gas fields, the limited-stage layered fracturing technology can no longer meet the needs of multi-stage fracturing for oil and gas wells

At present, foreign cementing sleeves with unlimited series need to use pressure guiding pipelines for pressure transmission. The workload of drilling is heavy, and there is a risk of leakage at the connection of pipelines. risky, expensive

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