Smart Label Staged Fracturing Sliding Sleeve
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current multi-stage fracturing technologies for oil and gas fields, such as pumped bridge plug and perforation, multi-level sliding sleeve packer, and hydraulic jet staged fracturing, face challenges including long construction times, complex operations, limited displacement, and safety risks, which hinder efficient and large-scale reservoir utilization.
Innovation Solution
A full-bore indefinite-level staged fracturing sliding sleeve based on a smart label, featuring an identification module, detection module, gripper, sealing cylinder, and valve core, allows for automatic stage identification and controlled opening of fracturing stages without the need for electric seating tools or coiled tubing, enabling efficient and scalable fracturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If pumped bridge plug and perforation technology is used, then unlimited number of fracturing stages can be achieved, but construction time becomes long and ground cross operation becomes complicated
Solution Approach 1:
The sliding sleeve is equipped with an automatic opening mechanism that uses the flow direction of fracturing fluid itself to trigger opening, eliminating the need for external cable operations or ground cross activities. The sleeve automatically opens when fluid flows through it, achieving self-service operation that reduces construction time while maintaining unlimited stage capability
Solution Approach 2:
The invention extracts and eliminates the need for cable breakage tools, fishing tools, and ground cross operation equipment by using a passive flow-driven opening mechanism. This removes the complicated ground operations and reduces construction time while preserving the ability to perform unlimited fracturing stages
2Area of stationary object
If coiled tubing dragging sliding sleeve is used, then full-bore effect can be achieved, but displacement is limited due to size constraints
Solution Approach 1:
The invention uses hydraulic pressure from the fracturing fluid flow to drive the opening of the sliding sleeve. The fluid pressure acts on the valve core to push it horizontally and open the sandblasting port, eliminating the need for mechanical coiled tubing dragging. This hydraulic mechanism enables full-bore capability without displacement limitations
Solution Approach 2:
The sliding sleeve is divided into separate functional components including the valve core, sandblasting port, and opening mechanism. This segmentation allows each component to be optimized independently, enabling full-bore design while maintaining the ability to handle large displacement fracturing operations without coiled tubing size constraints
3Adaptability or versatility
If ball sliding sleeve staged fracturing is used, then fracturing can be performed, but the number of stages is limited due to decreasing sliding sleeve diameter
Solution Approach 1:
The sliding sleeve is designed with a universal constant-diameter structure that can accommodate multiple fracturing stages without requiring diameter reduction. The same sleeve design can be used for all stages, eliminating the need for progressively smaller sleeves and enabling unlimited stages while simplifying the overall device structure
Solution Approach 2:
The sliding sleeve is pre-positioned in the wellbore during cementing operations before fracturing begins. This preliminary placement allows multiple sleeves to be installed at different depths in advance, enabling unlimited staged fracturing without needing to change sleeve diameters or perform complex operations during the fracturing process itself
4Productivity
If hydraulic jet staged fracturing is used, then fracturing can be performed, but wellhead pressure is high and construction safety risk is high
Solution Approach 1:
The invention extracts and removes the high-pressure hydraulic jet mechanism from the wellhead system. Instead, it uses a lower-pressure flow-driven opening mechanism where the fracturing fluid itself opens the sliding sleeve passively. This eliminates the high wellhead pressure requirement and associated safety risks while maintaining effective fracturing capability
Solution Approach 2:
The sliding sleeve acts as an intermediary device that decouples the wellhead pressure system from the downhole fracturing operation. The sleeve opens at lower pressure using flow direction control, then allows high-pressure fracturing to occur downhole without transmitting that pressure back to the wellhead, thereby improving construction safety while maintaining fracturing effectiveness
Data Source
AI summary
The application provides a full-bore infinite-level staged fracturing sliding sleeve based on a smart label, which includes a fracturing sliding sleeve and a smart label for opening the fracturing sliding sleeve. The fracturing sliding sleeve is placed into a wellbore with a casing and cementing is performed. Each fracturing sliding sleeve corresponds to a target fracturing stage in the well. The smart label is placed into the casing through a wellhead, and is pumped forwards in the wellbore; the smart label automatically identifies the target fracturing stage, and is clamped and seated in the fracturing sliding sleeve of the target fracturing stage, thus realizes the opening of the fracturing sliding sleeve with the pressure from a pump truck. The opening of the fracturing sliding sleeve of each stage corresponds to a smart label. After all the stages are fractured, the smart labels are completely dissolved in the fracturing fluid.