Modular Strain Puck for Downhole Drill Bit Force Measurement
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Solution Overview
Problem
Downhole drill bits face wear and fatigue due to various forces during drilling operations, leading to inefficient drilling and potential damage, as existing technologies lack effective means to accurately measure and manage these forces in real-time.
Innovation Solution
A strain puck system is introduced, comprising strain pucks mechanically attached to the drill bit with strain gauge bars that can be preloaded to measure tension and compression forces, allowing for real-time data collection and transmission to optimize drilling parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If strain pucks are permanently integrated to the drill bit, then measurement reliability is improved, but device complexity and ease of repair worsen
Solution Approach 1:
The measurement system is segmented into modular strain pucks that can be independently attached and detached from the drill bit. Each strain puck is a self-contained unit with strain gauge bars that can be replaced without affecting the entire drill bit assembly, thus maintaining measurement reliability while reducing overall system complexity and facilitating repairs.
Solution Approach 2:
The strain pucks are designed with dynamic attachment and detachment capabilities, allowing them to be temporarily or permanently integrated based on operational needs. This dynamic configuration enables the system to adapt between high-reliability permanent integration and ease-of-repair temporary integration scenarios.
2Reliability
If strain pucks are permanently integrated to the drill bit, then measurement consistency is improved, but ease of repair worsens
Solution Approach 1:
By segmenting the measurement system into replaceable strain puck modules, the design enables consistent measurements through standardized integration while allowing individual pucks to be quickly replaced when damaged, thus maintaining measurement consistency without compromising ease of repair.
Solution Approach 2:
The strain pucks are designed to be replaceable components that can be discarded when worn or damaged and recovered for replacement on the drill bit. This approach maintains measurement consistency through standardized replacement parts while significantly improving ease of repair compared to permanent integration.
3Measurement precision
If strain gauge bars are preloaded to measure tension and compression, then measurement precision is improved, but device complexity worsens
Solution Approach 1:
The strain gauge bars are preloaded during assembly to establish a predetermined force state before actual drilling operations begin. This preliminary action ensures that the bars are properly tensioned to measure both tension and compression forces accurately, improving measurement precision without requiring complex real-time adjustment mechanisms.
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 strain puck system enables accurate measurement of downhole forces, allowing for optimized drilling parameters that extend the drill bit's lifetime and improve drilling efficiency by reducing excessive force application.
Implementation Method 1
each puck assembly includes at least one strain gauge bar secured within a puck recess formed in the downhole drilling tool. The strain gauge bar includes at least one wedge feature configured to be press-fit into a portion of the puck recess by a strain puck cap of the strain puck such that the strain gauge bar may be preloaded in the puck recess. Preloading the strain gauge bar may permit the strain gauge bar to consistently and accurately measure both tension and compression for the downhole drill bit.
Data Source
AI summary
A system may include a strain gauge bar securable within a puck recess formed in an outer surface of a downhole drill bit. The strain gauge bar may be configured to collect data indicating a downhole force applied to the downhole drill bit during drilling operations. Further, the strain gauge bar may have a body portion and at least one wedge feature protruding from the body portion. The at least one wedge feature may be insertable into at least one wedge recess formed in the bottom surface of the puck recess. The system may also include a strain puck cap securable within the puck recess. The strain puck cap may be configured to apply pressure to the strain gauge bar to drive the at least one wedge feature of the strain gauge bar into the at least one wedge recess and pre-load the strain gauge bar.