Liner Hanger Entry Guide Deformation
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Solution Overview
Problem
Existing tubular string entry systems face difficulties due to the lack of an entry guide at the end of the string, particularly when the liner hanger is not initially provided with one, leading to challenges in aligning and inserting subsequent tubular strings or equipment into the wellbore.
Innovation Solution
A forming device is used to deform the end of the tubular string or liner hanger from a cylindrical shape to an outwardly widening shape, either by applying weight or pressure differentials, to create an entry guide that allows easy passage of additional strings or equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a liner hanger is connected in the tubular string without an initial entry guide, then the tubular string can be assembled and installed, but subsequent tubular strings or equipment cannot be easily inserted into the wellbore
Solution Approach 1:
The forming device is conveyed into the wellbore before the entry guide is needed, and the cylindrical deformation is applied in advance to create the entry guide at the end of the tubular string or liner hanger. This preliminary action ensures that when subsequent tubular strings or equipment need to be inserted, the entry guide is already in place to facilitate easy entry.
2Ease of operation
If the end of the tubular string is deformed to create an entry guide, then entry is facilitated, but the original cylindrical shape is altered
Solution Approach 1:
The forming device applies deformation locally only at the end portion of the tubular string or liner hanger where entry is required. The majority of the tubular string maintains its original cylindrical shape and structural integrity, while only the specific localized area is deformed outwardly to create the entry guide geometry.
3Ease of manufacture
If a forming device is conveyed into the wellbore to deform the tubular string end, then an entry guide can be formed, but the operation becomes more complex
Solution Approach 1:
The forming device is designed to perform multiple functions: it is conveyed into the wellbore on a work string, anchors itself to the tubular string, and applies the deformation to create the entry guide. This multi-functional design consolidates what could be multiple separate operations into a single integrated device, reducing overall operational complexity.
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
The solution enables convenient formation of an entry guide within the tubular string or liner hanger, facilitating the easy entry of subsequent tubular strings, equipment, and tools into the wellbore, thereby improving the efficiency of wellbore operations.
Implementation Method 1
deforming the end of the tubular string from a cylindrical shape to an outwardly widening shape with the forming device
Implementation Method 2
pressure differentials are used to anchor the forming device, displace deforming structures
Data Source
AI summary
A method of forming an entry guide at an end of a tubular string in a wellbore can include conveying a forming device into the wellbore, and deforming the end of the tubular string from a cylindrical shape to an outwardly widening shape with the forming device. A method of forming an entry guide at an end of an expanded liner hanger in a wellbore can include outwardly expanding the liner hanger, thereby sealingly securing a tubular string in the wellbore, and deforming the end of the liner hanger from a cylindrical shape to an outwardly widening shape with a forming device.