Wellbore Fluid Communication Tool Single-Trip Cementing
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Solution Overview
Problem
The construction of wellbores for hydrocarbon production often requires high-pressure primary cementing operations, which can lead to unintended fracturing of the formation and is inefficient due to the need for multiple cementing runs, increasing both time and cost.
Innovation Solution
A wellbore fluid communication tool is used to facilitate a single trip cementing operation by allowing cement to be introduced into the wellbore annulus from the top, reducing the need for high pressures and multiple runs, utilizing a housing with radial ports, a seal assembly, and a door assembly that can transition between closed and open configurations to enable efficient cement distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If high pressure is used to deliver cement through the tubular string to the wellbore annulus, then cement delivery is achieved, but formation fracturing occurs
Solution Approach 1:
The cementing process is divided into two separate stages: first, cement is pumped through the tubular string to the bottom hole; second, a communication tool opens to allow cement to flow from the bottom hole up the annulus. This segmentation eliminates the need for high-pressure annulus delivery that causes formation fracturing.
Solution Approach 2:
The communication tool is pre-installed on the tubular string before cementing. When activated, it creates a communication path that allows cement to flow upward through the annulus without requiring high pressure, thus preventing formation damage while achieving the desired cement placement.
2Object-affected harmful factors
If multiple cementing runs are performed to avoid formation fracturing, then formation integrity is maintained, but time and cost increase
Solution Approach 1:
The communication tool combines multiple functions into a single device: it serves as both a cement delivery conduit and an annulus communication valve. By integrating these functions, the tool enables a single-trip cementing operation that maintains formation integrity while eliminating the need for multiple separate cementing runs.
Solution Approach 2:
The communication tool is designed to perform multiple functions: delivering cement through the tubular string, creating a communication path to the annulus, and controlling cement flow direction. This multi-functionality allows a single operation to achieve what previously required multiple specialized runs.
3Reliability
If multiple cementing runs are performed to ensure proper cement placement, then cementing quality is improved, but operational cost increases
Solution Approach 1:
The communication tool is designed to activate automatically or through simple external signaling, eliminating the need for complex external control systems. The tool self-regulates cement flow through its internal valve mechanism, ensuring proper cement placement while reducing operational complexity and cost.
Data Source
AI summary
A system and method directed to performing a single trip cementing operation at spaced out locations within a hydrocarbon zone during the construction of a wellbore using a wellbore fluid communication tool. In an embodiment, the tool is deployed on a tubular string above the hydrocarbon zone and comprises a housing including at least one radial port, a seal assembly, an outer sleeve assembly having a door assembly operable to translate across the seal assembly while closed, an inner mandrel and a seat assembly. The tool facilitates the placement of cement within a wellbore annulus from an uphole position in lieu of at the bottom of the wellbore thereby minimizing the pressure required to perform cementing job. At the same time, the ability for the door assembly to translate across the seal assembly while closed ensures the seal is not damaged from repetitive opening and closing of the door assembly.