Downhole Stabilizer with Angled Cutting Rings
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Solution Overview
Problem
Existing stabilizers for well drilling operations face challenges in effectively centralizing the drill string and reducing torque and drag, while also facilitating fluid flow and wear resistance.
Innovation Solution
A stabilizer design featuring an elongate body with cutting rings mounted at non-orthogonal angles to the long axis, which act as rollers to support the drill string and reduce friction, allowing for axial sliding movement and enhanced fluid flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If cutting rings are mounted at non-orthogonal angles to the long axis, then fluid flow is enhanced and drag is reduced, but manufacturing complexity increases
Solution Approach 1:
The cutting rings are mounted at non-orthogonal angles to the long axis of the stabilizer body, creating a dynamic configuration that enhances fluid flow through the stabilizer. This angular mounting allows drilling fluid to flow more efficiently along the stabilizer body, reducing drag and improving cooling and debris removal, while the rings remain fixed in their angular positions during operation.
2Force
If cutting rings are mounted at non-orthogonal angles, then torque is reduced, but device complexity increases
Solution Approach 1:
The cutting rings are oriented at angles relative to the long axis of the stabilizer body, introducing an angular dimension to the traditional axial mounting. This angular orientation creates multiple contact points with the wellbore wall that distribute forces more effectively, reducing torque on the drill string while the rings remain fixed in their angular positions.
3Stability of the object's composition
If cutting rings contact the wellbore wall at multiple points, then drill string centralization is improved, but wear increases
Solution Approach 1:
The cutting rings are configured to rotate on their own axes as the stabilizer moves through the wellbore, allowing them to maintain contact with the wellbore wall at multiple points around the drill string. This rotation distributes wear across the ring surface rather than concentrating it at a single contact point, extending component life while maintaining effective centralization.
Solution Approach 2:
The cutting rings are made from wear-resistant materials such as hardened steel or ceramic composites, which provide the necessary durability to withstand contact with the wellbore wall at multiple points while maintaining their structural integrity and cutting edges over extended periods of operation.
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 stabilizer effectively centralizes the drill string, reduces torque and drag, and enhances fluid flow by utilizing cutting rings that rotate and contact the wellbore wall at multiple points, improving drilling efficiency and reducing wear.
Implementation Method 1
a first cutting ring mounted on the elongate body and exposed on the outer surface with an annular outer surface of the first cutting ring encircling the elongate body, the first cutting ring has a plane defined through the annular outer surface and is installed with the plane at a non-orthogonal angle relative to the long axis
Data Source
AI summary
A stabilizer for use in a wellbore string, the stabilizer having an elongate body having an upper end for connection to the wellbore string and a lower end for connection to a wellbore string, a long axis between the ends and an outer surface; and a first cutting ring mounted on the elongate body and exposed on the outer surface with an annular outer surface of the first cutting ring encircling the elongate body.