Drilling Energy Calculation via Transient Dynamics Simulation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current drilling technologies face inefficiencies in optimizing energy use and minimizing energy loss during subsurface wellbore drilling, as energy input is dissipated due to frictional torque, axial drag, and other interactions between the drill string and the wellbore, leading to suboptimal drilling performance.
Innovation Solution
A method that calculates the energy input and distribution within the drill string, including strain and kinetic energy, to identify and adjust drilling parameters, such as weight on bit and drill string rotation, to minimize energy loss and maximize energy transfer to the formations, using finite element analysis and transient dynamics simulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If energy is applied to the drill string to drive the drill bit, then drilling operation is enabled, but energy loss occurs due to frictional torque and axial drag between the drill string and wellbore wall
Solution Approach 1:
The patent applies parameter changes by using transient dynamics simulation to calculate and analyze energy parameters (strain energy, kinetic energy, energy loss) under different drilling conditions. This enables optimization of drilling parameters such as weight on bit, rotary speed, and feed rate to minimize energy loss while maintaining productive drilling operations.
2Loss of energy
If drilling parameters are optimized to minimize energy loss, then energy efficiency improves, but complex calculations and simulations are required
Solution Approach 1:
The patent applies preliminary action by performing transient dynamics simulation and energy calculation before actual drilling operations. This allows drilling parameters to be optimized in advance based on simulated energy analysis, reducing energy loss during actual operations without requiring complex real-time calculations during drilling.
Solution Approach 2:
The patent uses transient dynamics simulation to create a virtual model (copy) of the drilling system that replicates the physical drill string behavior. This computational model allows energy analysis and parameter optimization to be performed on the simulated system, avoiding the need for complex physical measurements and calculations during actual drilling operations.
3Measurement precision
If transient dynamics simulation is used to calculate energy distribution, then energy loss identification improves, but computational requirements increase
Solution Approach 1:
The patent replaces physical measurement systems with computational mechanics simulation. Instead of using complex physical sensors and measurement devices to directly measure energy distribution in the drill string, the invention uses transient dynamics simulation to calculate strain energy, kinetic energy, and energy loss, achieving precise energy analysis through computational methods.
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
This approach allows for more efficient energy utilization, reducing energy loss and improving drilling efficiency by optimizing drilling parameters, which can enhance drilling speed and reduce equipment stress, thereby improving overall drilling performance.
Implementation Method 1
Part of the energy input may be converted to drill string elastic strain/kinetic energy
Implementation Method 2
other portions of the input energy may be dissipated as thermal energy generated by frictional torque and axial drag between the drill string and the wall of the wellbore
Implementation Method 3
other portions of the input energy may be dissipated as thermal energy generated by frictional torque and axial drag between the drill string and the wall of the wellbore
Data Source
AI summary
A method for drilling a well includes applying energy input to a drill string (31) by at least one of rotating the drill string (31) from surface and operating a drilling motor (41) disposed in the drill string (31) to operate a drill bit (2) at a bottom of the drill string (31); an amount of the applied energy not consumed in drilling formations caused by at least one of motion, deformation, and interaction of the drill string (31) is calculated; an amount of the applied energy used to drill formations below the drill bit (2) is calculated; and at least one drilling operating parameter is adjusted based on energy calculation before or during drilling operation.