Chute counting type infinite-order full-bore well completion fracturing device

Abstract

The invention provides a chute counting type infinite-order full-bore well completion fracturing device which comprises a fracturing sliding sleeve and a soluble information ball, the fracturing sliding sleeve comprises an upper connector, a lower connector, an outer sleeve, a fixed sleeve, an annular piston and a counting core cylinder, and the annular piston seals the outer sleeve and inner and outer fracturing holes in the upper connector; the counting core cylinder is in clearance fit with the inner wall of the outer sleeve, a variable-diameter limiting ball seat and a rotary counting moving mechanism are arranged on the counting core cylinder, a limiting sleeve is arranged on the periphery of the counting core cylinder at the upper end of a limiting boss and corresponds to the position above the variable-diameter limiting ball seat, and a soluble information ball is matched with the variable-diameter limiting ball seat. According to the invention, a full-bore infinite-stage sliding sleeve is realized, a rotary sliding chute type counting mode is adopted, the structure is compact, the tool is simple and short, the counting quantity is easy to expand, the ball throwing structure is simple, the staged fracturing process requirements of an ultra-deep and ultra-long horizontal section well can be met, and the working efficiency is improved. Sliding sleeve opening faults are reduced, the fracturing efficiency is improved, and the construction cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of oil and gas development, and in particular relates to a chute counting type infinite-stage full-bore completion fracturing device. Background technique [0002] The multi-stage and staged stimulation completion mode of horizontal wells is the main way to stimulate the production of unconventional oil and gas reservoirs. It is very urgent to improve the speed and efficiency of fracturing technology for ultra-deep and ultra-long horizontal wells. The current staged fracturing technology of pumping bridge plug and perforation combined with multi-stage sliding sleeve packer fracturing technology is the mainstream technology for horizontal multi-stage multi-stage fracturing stimulation, which can increase the stimulation effect and scale of shale reservoirs. Effective use provides strong technical support. [0003] The pumped bridge-plug perforation combined staged fracturing technology uses coiled tubing, cr...

AI Technical Summary

Problems solved by technology

The step-by-step sliding sleeve fracturing is due to the existence of the step difference, that is, the diameter of the sliding sleeve tool becomes smaller as it goes down, so the number of fracturing stages is limited, and it is impossible to perform multi-stage fracturing on oil and gas layers, and cannot meet the requirements Ultra-deep, ultra-long horizontal section wells require multi-stage fracturing of oil and gas reservoirs, and the small diameter will also affect fracturing displacement, subsequent detection tools and workover operations, etc.

During the construction process, changes in displacement, liquid viscosity and sand ratio will cause changes in frictional resistance and liquid column weight along the way, which will lead to large fluctuations in surface pressure, and it is difficult to obtain accurate pressure data, which cannot be used for subsequent plan formulation and construction. Provide accurate data reference, increase the blindness of the test and the error and rework of the test switch well operation judgment

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