Packer Setting Assembly Integrating Sealing and Pressure Testing
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Solution Overview
Problem
Existing methods for installing and pressure testing mechanical set packers in wellbore liner hangers are inefficient, as they require lengthy travel strings for setting and verification, leading to time-consuming and costly additional runs.
Innovation Solution
A setting assembly that applies longitudinal force to the top of the packer, sealing the interior of the tubing string to facilitate pressure testing and ensure a proper seal before removing the setting assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a travel string is used to set the packer, then the packer can be mechanically set, but the travel string must remain in place for pressure testing which requires additional runs and time
Solution Approach 1:
The patent combines the setting assembly and pressure testing capability into a single integrated tool. The setting assembly applies axial force to set the packer while simultaneously providing a seal within the tubing to enable pressure testing, eliminating the need for separate operations and additional runs.
Solution Approach 2:
The setting assembly performs multiple functions: it mechanically sets the packer by applying axial force, seals the interior of the tubing string to contain pressure, and enables pressure testing of the packer seal. This multi-functional tool eliminates the need for separate setting and testing operations.
2Productivity
If the travel string is removed after setting the packer, then the well can proceed to next operations, but the packer cannot be pressure tested without the setting assembly in place
Solution Approach 1:
The tool merges the setting function and pressure testing function into one device, allowing both operations to be performed while the tool remains in the well. This eliminates the need to keep the travel string in place solely for testing purposes.
Solution Approach 2:
The setting assembly performs the pressure testing capability setup in advance by providing a seal within the tubing during the setting operation itself. This preliminary action enables immediate pressure testing without requiring the tool to remain in place for an extended period.
3Reliability
If a setting assembly is used to apply force to the packer, then the packer can be set, but the setting assembly must remain in the well for pressure testing which increases device complexity
Solution Approach 1:
The setting assembly is segmented into distinct functional components: a setting tool for applying axial force to set the packer, and a seal element that provides a seal within the tubing. This segmentation allows each component to perform its specific function while contributing to the overall simplicity of the system.
Solution Approach 2:
The setting assembly is designed to perform both setting and pressure testing functions, making it a universal tool that eliminates the need for additional specialized equipment. The same assembly that sets the packer also enables pressure testing through its integrated seal.
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
Enables efficient pressure testing and verification of packer seals, reducing the need for additional runs and saving time and resources by ensuring the packer is adequately set before tool withdrawal.
Implementation Method 1
an elastomeric packer element compressed by a setting tool between setting rings and/or thimbles and thereby radially expanding the elastomeric element out against the casing
Implementation Method 2
fluid pressure may be applied to the top of the liner hanger and a leak off test, or other appropriate test, performed to verify that the liner hanger packer has established an adequate seal
Data Source
AI summary
Devices and methods related to setting and testing a packer in a single trip are disclosed. Embodiments disclosed herein provide a tubing engagement element for applying longitudinal force to expand the packer element, such as by compressing an elastomeric element longitudinally to cause radial expansion. Further, upon application of longitudinal force, a second packer element, inside of the first, also sets, isolating the interior of the packer form the exterior. The isolation on the interior of the packer, or tubing attached thereto, permits formation of a pressure differential across the installed packer, facilitating a pressure test to ensure that the packers is adequately set.