Drive-by-wire sliding sleeve fracturing technology

Abstract

The invention relates to the field of oil and gas well exploitation, and provides a drive-by-wire sliding sleeve fracturing technology. After a pipe column is tripped in, a control system sends an instruction to the last stage of drive-by-wire sliding sleeve, a hydraulic oil way is communicated, a pipeline pressurizes the drive-by-wire sliding sleeve, a fracturing nozzle is opened, and fracturing construction is carried out; after fracturing construction is achieved, the pipeline pressurizes the drive-by-wire sliding sleeve again, the fracturing nozzle is closed, the control system sends the instruction to the last stage of drive-by-wire sliding sleeve, and the hydraulic oil way is closed; the steps are repeated, the other layer sections are fractured, and after all the steps are completed, the drive-by-wire sliding sleeves of all the layer sections are opened for production; and the structure is reliable, two pipeline hydraulic switches are adopted, and the switch thrust is large. According to the drive-by-wire sliding sleeve fracturing technology, mechanical metal sealing and hydraulic cylinder compensation sealing are adopted, and the sealing pressure is high; a double-hydraulic-cylinder structure is adopted, so that the tripping-in depth is not influenced; the flow area of the fracturing nozzle is large, and impurity accumulation is avoided; an anti-scouring inner pipe is designed, and the service life is long; and long-time well bottom monitoring is achieved.

Description

technical field [0001] The invention relates to the field of oil and gas well exploitation, in particular to a wire-controlled sliding sleeve fracturing technology. Background technique [0002] At present, China's shale gas resources are very rich and have great development prospects, but the development of related development technologies is still in its infancy. In terms of reservoirs, shale gas has low porosity and low permeability characteristics, which make it difficult to develop shale gas. [0003] The development of shale oil, gas wells and long horizontal wells can be divided into the following fracturing technologies, ball sliding sleeve fracturing technology, cementing sliding sleeve fracturing technology, bottom fracture dragging fracturing technology, pumping bridge plug pressure crack technology. Through the comparison of the above processes, the current mainstream technology is the pumping bridge plug fracturing technology, but it also requires perforation ...

AI Technical Summary

Problems solved by technology

Through the comparison of the above processes, the current mainstream technology is the pumping bridge plug fracturing technology, but it also requires perforation before each stage of fracturing, and the operation time is long; the casing deformation makes it difficult to send the bridge plug; the soluble bridge plug, Dissolution is not complete; bridge plugs can be drilled, wear to the casing, and coiled tubing has limited ability to operate in ultra-deep wells, etc.

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