Smart Key Label Sliding Sleeve for Staged Fracturing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current sliding sleeve technologies in oil and gas field fracturing are limited by the need for sequential diameter reduction and inconsistent screw or dart specifications, leading to restricted fracturing stages and displacement, with construction operations like cementing affecting the success rate of opening the sleeves.
Innovation Solution
A staged multi-cluster fracturing sliding sleeve system utilizing a smart key label with a sliding push sleeve, cone guide body, sealing ring, and position detection sensor, allowing for the automatic identification and expansion of the sealing ring to open multiple sliding sleeves in a single stage without diameter reduction, enabling identical inner diameters across all stages and clusters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If ball sliding sleeve is used with decreasing diameter level by level, then staged fracturing can be realized, but the number of fracturing stages and displacement are limited
Solution Approach 1:
The sliding sleeve is divided into multiple independent clusters, each with its own opening mechanism. This allows each cluster to be opened independently at the same diameter level, enabling unlimited fracturing stages without requiring diameter reduction. The segmentation of the sliding sleeve into multiple clusters resolves the contradiction by maintaining constant diameter while increasing the number of operable stages.
Solution Approach 2:
The patent introduces a dynamic opening mechanism where the sliding sleeve can be opened at multiple positions simultaneously through a control system. This dynamic control allows the sliding sleeve to transition from a closed state to multiple open states without changing diameter, thereby increasing adaptability while maintaining structural simplicity.
2Adaptability or versatility
If mechanical screw or dart sliding sleeve is used with identical diameters, then more stages are possible, but the matching degree between screw/dart and internal slot is affected by cementing operations
Solution Approach 1:
The patent replaces the mechanical screw or dart opening mechanism with a smart key label system that uses magnetic fields and position detection sensors. This substitution eliminates the mechanical matching problem between screws/darts and internal slots, as the smart key label opens the sliding sleeve through a different mechanism that is not affected by cementing operations, thereby improving reliability while maintaining multiple stages.
Solution Approach 2:
The smart key label acts as an intermediary between the control system and the sliding sleeve opening mechanism. It detects the position of the sliding sleeve through magnetic fields and triggers the opening action, serving as a mediator that is not directly affected by cementing operations and ensures reliable opening regardless of well construction history.
3Reliability
If different size specifications of sliding sleeve and screw are used, then matching can be achieved, but construction operations become complex and time-consuming
Solution Approach 1:
The patent designs a universal sliding sleeve structure with identical diameters across all stages and clusters, eliminating the need for different size specifications. The smart key label system serves multiple functions: position detection, opening control, and stage identification, thereby simplifying construction operations and increasing productivity while maintaining reliable matching.
4Adaptability or versatility
If traditional sliding sleeve system is used, then staged fracturing can be achieved, but full-bore indefinite-level staged fracturing cannot be realized
Solution Approach 1:
The sliding sleeve is segmented into multiple independent clusters that can be opened simultaneously at the same diameter level. This segmentation allows full-bore fracturing across multiple stages without requiring diameter reduction, achieving indefinite-level staged fracturing while maintaining a relatively simple structure.
Solution Approach 2:
The patent transitions from a single-dimension diameter-based staging system to a multi-dimensional system where multiple clusters at the same diameter level can be opened simultaneously. This dimensional change allows indefinite-level fracturing without increasing structural complexity, as the additional capability is achieved through control rather than structural variation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enables unlimited fracturing stages and displacement, improves the reliability and flexibility of fracturing operations, reduces construction complexity, and ensures consistent pipe diameters, enhancing the success rate and scalability of oil reservoir development.
Implementation Method 1
a position detection sensor, a control circuit board and a high temperature battery are arranged in the sealing cavity and are connected by a wire; the first housing part being integrally formed or separately formed, and the position detection sensor being capable of detecting the first magnetic field
Implementation Method 2
the actuator is capable of driving the sliding push sleeve to move relative to the cone guide body
Implementation Method 3
the sliding push sleeve drives the sealing ring to move relative to the cone guide body to expand or contract the sealing ring
Implementation Method 4
a flowback channel is formed in a left part of the sliding push sleeve and a soluble ball is arranged on a left end of the flowback channel, which is capable of blocking a left part of the flowback channel
Data Source
AI summary
The invention relates to the technical field of oil and gas field development, in particular to a staged multi-cluster fracturing sliding sleeve system and method based on smart key label. The system includes at least one multi-cluster sliding correspondingly placed in each fracturing stage, an end sliding sleeve, and a smart key label. The method includes: step S1, performing fracturing stage by stage from a first stage to a last stage, placing the smart key label through a wellhead and pumping the smart key label to the target fracturing stage; step S2, opening the multi-cluster sliding sleeves of the current fracturing stage one by one through the smart key label, and finally blocking the smart key label in the end sliding sleeve when the multi-cluster sliding sleeve and the end sliding sleeve of the current fracturing stage are opened; and step S3, repeating the steps S1 and S2 until the fracturing operations of all the stages are completed.