Downhole Tool Mandrel with Relief Point for Drillable Isolation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional downhole tools face challenges in forming reliable seals in horizontal wellbores, experiencing high drag during removal, and being difficult to drill through due to metallic components, leading to operational inefficiencies and increased costs.
Innovation Solution
A downhole tool design featuring a mandrel with a relief point, metal slips, and a composite sealing element that can be easily drilled through, reducing drag and improving seal reliability, especially in horizontal orientations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional metallic downhole tools are used, then strength and durability are improved, but difficulty in drilling through increases
Solution Approach 1:
The mandrel is divided into two distinct parts: a proximal metallic portion providing strength and durability, and a distal composite portion enabling easy drillability. This segmentation allows each part to fulfill its specific functional requirement without compromising the other.
Solution Approach 2:
The downhole tool employs a composite construction with a metallic proximal portion and a composite distal portion. This composite material approach enables the tool to simultaneously achieve the strength of metal and the drillability of composite materials, resolving the contradiction between these two properties.
2Reliability
If metallic components are used in downhole tools, then reliability under extreme conditions is improved, but hydraulic drag increases
Solution Approach 1:
The tool uses a composite distal portion that reduces hydraulic drag compared to conventional metallic tools, while the metallic proximal portion maintains reliability under extreme downhole conditions. This composite construction resolves the contradiction between reliability and hydraulic drag.
3Reliability
If conventional sealing elements are used, then seal reliability is improved, but ease of removal decreases
Solution Approach 1:
The distal composite portion of the tool enables easier removal through drilling operations, while the sealing element maintains its reliability. The composite material's drillability allows for quicker removal compared to conventional metallic tools, resolving this contradiction.
4Reliability
If horizontal wellbore sealing is attempted with conventional tools, then wellbore isolation is achieved, but operational efficiency decreases
Solution Approach 1:
The composite distal portion reduces hydraulic drag, enabling faster run-in and removal operations in horizontal wellbores. This improves operational efficiency while the sealing element ensures reliable wellbore isolation, resolving the contradiction between these two parameters.
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 tool enables faster and more efficient wellbore isolation, reduced hydraulic drag, and quicker removal, while withstanding extreme downhole conditions, thus enhancing operational efficiency and cost-effectiveness.
Implementation Method 1
The relief point may be configured in such a manner whereby at least a portion of the proximal end may be ripped therefrom
Data Source
AI summary
A downhole tool for use in a wellbore that includes a mandrel; a first slip disposed around the mandrel, the first slip further comprising a one-piece configuration; a first cone disposed around the mandrel, and proximate to the first slip; a second slip disposed around the mandrel; a second cone disposed around the mandrel; a sealing element disposed around the mandrel, and between the first cone and the second cone; and a lower sleeve disposed around the mandrel, and proximate to the first slip. The mandrel further includes a distal end having a first outer diameter; a proximate end having a second outer diameter; wherein a relief point is formed in the proximate end.