Single-Trip Cementing and Sand Control for Multizone Completions
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Solution Overview
Problem
Existing wellbore completion systems face challenges in efficiently performing simultaneous cementing and sand control operations, particularly in multizone environments, with existing tools and methods being inefficient and requiring multiple trips or complex procedures.
Innovation Solution
A system and methodology involving a service tool and work string that allows for the simultaneous deployment of a sand control completion and cementing assembly, enabling operations like gravel packing and cementing in a single trip, with the service tool comprising components like a cement sleeve assembly and gravel pack sleeve, allowing for controlled fluid flow and reverse operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate operations are used for cementing and sand control, then operational reliability is improved, but productivity deteriorates due to multiple trips required
Solution Approach 1:
The patent combines cementing operations and sand control operations into a single integrated completion system. The completion string includes both cementing ports for cement injection and sand control screens/gravel pack components, allowing both operations to be performed simultaneously during one wellbore trip, thereby improving productivity while maintaining operational reliability through dedicated functional components.
Solution Approach 2:
The completion string is designed with multi-functionality, serving both as a cementing delivery system and a sand control system. The same completion string that delivers cement to the wellbore also provides sand control through integrated screens and gravel pack capabilities, eliminating the need for separate operations and multiple trips.
2Productivity
If simultaneous cementing and sand control operations are performed, then productivity is improved, but device complexity increases
Solution Approach 1:
The completion string is segmented into distinct functional zones with dedicated ports and passages. Cementing ports are separated from gravel pack ports, and internal passages are configured to direct cement slurry and gravel pack material through different routes. This segmentation allows simultaneous operations while managing complexity through modular functional design.
Solution Approach 2:
The patent uses intermediary components such as diverters, seals, and flow control elements to manage the simultaneous injection of cement and gravel pack materials. These intermediaries coordinate the two operations, preventing interference between them while allowing both to proceed through the same completion string, thus managing device complexity.
3Device complexity
If existing gravel pack-cementing apparatuses are used, then device complexity is reduced, but ease of operation deteriorates due to limited selective control
Solution Approach 1:
The completion string incorporates dynamic flow control capabilities through movable diverters, opening/closing ports, and selective passage activation. These dynamic elements allow operators to control which zones receive cement versus gravel pack material in real-time during the operation, providing selective control that simplifies operation while managing device complexity through mechanical actuation mechanisms.
Data Source
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AI summary
A technique facilitates downhole operations, e.g. gravel packing and cementing operations, in a borehole. According to an embodiment, a service tool is releasably coupled with respect to a casing. The casing is used to run the service tool downhole into a borehole. In some embodiments, the casing is connected with a downhole completion, e.g. a sand control completion. A work string may then be conveyed downhole to the service tool and connected to the service tool. While connected to the work string, the service tool may be operated to perform desired downhole operations.