Radially Biased Fin Latching Apparatus for Downhole Tool Alignment
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Solution Overview
Problem
Existing downhole latching equipment fails to securely and reliably align and connect logging tools with landing elements during drilling operations, leading to misalignment issues due to various drilling conditions.
Innovation Solution
A latching apparatus comprising a body with radially biased fins, driven by a spring mechanism, which is pumped down a drilling tubular to securely engage and disengage with a landing ring, ensuring stable tool alignment and connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional latching equipment is used to connect logging tools with landing elements, then the connection can be established, but misalignment occurs due to drilling conditions and the connection is not secure or reliable
Solution Approach 1:
The latching apparatus employs radially biased fins that can dynamically adjust their position between an engaged state (protruding radially outward to latch onto the landing ring) and a disengaged state (retracted radially inward to pass through the landing ring). This dynamic mechanism allows the device to adapt to misalignment conditions while maintaining secure connection when properly aligned.
Solution Approach 2:
The biasing element (spring) changes the radial position parameter of the fins, enabling them to protrude outward for secure latching or retract inward for passage through the landing ring. This parameter change allows the same structure to serve multiple functions: secure connection during operation and easy passage during installation/removal.
2Reliability
If a secure latching mechanism is implemented to ensure stable tool positioning, then connection reliability improves, but the force required for insertion increases
Solution Approach 1:
The fins are designed to be radially biased rather than fixed, allowing them to flex and compress the spring during insertion. This dynamic design reduces the peak insertion force required while still providing secure latching once the fins engage with the landing ring grooves.
Solution Approach 2:
The spring element acts as a cushioning mechanism that absorbs insertion force. As the fins encounter resistance during insertion, the spring compresses to reduce the impact force, then expands to provide the latching force once engagement occurs.
3Reliability
If the latching apparatus is designed to securely engage with the landing ring, then connection stability improves, but release becomes difficult requiring disassembly of the bottom hole assembly
Solution Approach 1:
The latching mechanism uses radially movable fins biased by springs rather than permanent mechanical interlocks. This dynamic design allows the fins to be forced inward (against spring bias) to disengage from the landing ring grooves, enabling easy release without disassembling the bottom hole assembly.
Solution Approach 2:
Instead of requiring force to maintain latching and release by breaking the connection, the design inverts the force requirement: the spring naturally maintains latching (protruding fins engaged in grooves), but release is achieved by applying force to retract the fins inward, overcoming the spring bias temporarily.
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 provides a reliable and secure method for aligning and connecting logging tools with landing elements, reducing the force required for insertion and ensuring stable tool positioning, while allowing easy release without disassembly of the bottom hole assembly.
Implementation Method 1
a biasing element, having a first end coupled to the fin and a second end coupled to the body, for biasing the fin radially from the body
Implementation Method 2
resiliently biasing a fin of the latching apparatus radially outward; and forcing the latching apparatus through a landing ring, during which the landing ring forces the fin to move inward to a withdrawn position
Data Source
AI summary
A latching apparatus includes a body, a fin biased to protrude from the body, and a biasing element for so biasing the fin. A method for securing a tool in a drilling tubular includes connecting the tool to a latching apparatus, the latching apparatus including a fin biased to protrude radially outward, forcing the latching apparatus into the drilling tubular, and forcing the latching apparatus through a landing ring.