Drill Bit Design Selection for Stick-Slip Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Stick-slip vibration in drill bits during oil and gas well drilling leads to accelerated wear and damage, reducing drilling efficiency and the service life of drill strings, particularly with the use of polycrystalline diamond cutters (PDC) bits.
Innovation Solution
A system and method for selecting drill bit design patterns by correlating structural attributes with drilling performance metrics, using motion sensors to detect and classify stick-slip events, and determining a threshold efficiency value to minimize or eliminate bit-induced stick-slip, thereby optimizing drill bit design for reduced vibration and increased durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If fixed-cutter or hybrid drill bits are used to drill boreholes, then drilling capability is achieved, but stick-slip vibration occurs causing accelerated wear and damage
Solution Approach 1:
The patent modifies geometric parameters of the drill bit including cutter head angle, gage angle, and relief angle to optimize cutting performance and reduce stick-slip vibration. By changing these parameters, the drill bit maintains drilling capability while reducing harmful vibrations that cause wear and damage.
Solution Approach 2:
The patent introduces dynamic elements including vibration dampers and flexible cutter configurations that allow the drill bit to adapt to varying downhole conditions. These dynamic features help absorb and dissipate vibration energy, reducing stick-slip events while maintaining effective cutting action.
2Object-affected harmful factors
If drill bit structural attributes are optimized to reduce stick-slip, then vibration is reduced, but drilling efficiency may be compromised
Solution Approach 1:
The patent applies different geometric characteristics to specific regions of the drill bit. Each cutter and blade is designed with locally optimized angles and profiles tailored to its position and function, allowing vibration reduction in critical areas while maintaining high cutting efficiency in cutting zones.
Solution Approach 2:
The patent employs periodic vibration dampers and oscillating cutter configurations that create controlled periodic motions to counteract harmful stick-slip vibrations. This periodic action disrupts the stick-slip cycle while maintaining continuous cutting progress.
3Measurement precision
If motion sensors and performance monitoring are implemented, then stick-slip events are detected and classified, but system complexity increases
Solution Approach 1:
The drill bit incorporates integrated motion sensors and performance monitoring capabilities that automatically detect, measure, and report stick-slip events. The system self-monitors its own performance parameters including vibration, torque, and rate of penetration, eliminating the need for external monitoring equipment.
Solution Approach 2:
The monitoring system is designed to perform multiple functions simultaneously: detecting stick-slip events, measuring drilling performance parameters, and providing diagnostic information. This multi-functional approach consolidates what could be separate complex systems into a single integrated solution.
Data Source
AI summary
Systems and methods are disclosed for selecting a drill bit design that reduces or eliminates bit induced stick-slip. In some embodiments, each of a set of test drill bits is correlated with stick-slip events, wherein each of the test drill bits has a different design pattern comprising a combination of structural attributes. The design pattern stick-slip correlation includes, for each of the test drill bits, detecting variations in motion of the test drill bit during drilling operation. Stick-slip for each of the test drill bits is detected based on the detected variations in motion of the test drill bits during operation. The correlation further includes in response to detecting stick-slip, recording a stick-slip event in association with the corresponding test drill bit. The method further includes determining a performance efficiency value for each of the plurality of test drill bits and correlating the determined performance efficiency values with the stick-slip events to determine a threshold performance efficiency value. A design pattern for a drill bit is selecting or determined based, at least in part, on the threshold performance efficiency value.