Wurtzite Boron Nitride Drilling Tools Wear Resistance
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Solution Overview
Problem
Conventional drilling tools lack sufficient wear resistance and thermal stability for effective drilling in various materials, particularly in oil and gas applications.
Innovation Solution
The synthesis of single-phase, pure polycrystalline wurtzite boron nitride (w-BN) material through ultra-high-pressure, high-temperature processes, followed by laser cutting and bonding onto tool substrates, creates superhard drilling tools with enhanced properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional materials (polycrystalline diamond compact, grit hotpressed inserts, natural diamond) are used to construct drill bits, then the drill bits can create holes in various materials, but they lack sufficient wear resistance and thermal stability for effective drilling in certain applications
Solution Approach 1:
The patent applies parameter changes by precisely controlling pressure (15-25 GPa), temperature (1000-1500°C), heating rate (50-150°C/minute), and cooling rate (30-70°C/minute) during the UHPHT synthesis process to transform w-BN powder into a compact with superior wear resistance and thermal stability while maintaining manufacturability
Solution Approach 2:
The patent uses composite materials by creating a polycrystalline wurtzite boron nitride compact from fine powder particles, combining numerous small particles into a unified superhard material structure that achieves both enhanced reliability and manageable manufacturing complexity
2Reliability
If the w-BN powder is pressurized to ultra-high pressure (approximately 20 Gigapascal) and heated at high rate (100° C./minute) to synthesize the compact, then the resulting tool exhibits improved wear resistance and thermal stability, but the process requires precise control of multiple parameters
Solution Approach 1:
The patent systematically optimizes and controls multiple parameters including pressure (20 GPa), temperature (1000-1500°C), heating rate (100°C/minute), and cooling rate (50°C/minute) to achieve the desired material properties while managing process complexity through defined parameter ranges and sequences
Solution Approach 2:
The patent applies preliminary action by preparing the w-BN powder with specific particle size distribution and morphology before the UHPHT treatment, ensuring that the subsequent high-pressure high-temperature process produces the desired compact structure with improved reliability
3Manufacturing precision
If the compact is cut into smaller pieces using laser cutting tools, then the tool can be precisely formed and fitted to substrates, but the cutting process generates heat that may affect the w-BN material
Solution Approach 1:
The patent converts the harmful thermal effect of laser cutting into a beneficial process by utilizing controlled laser heating to facilitate precise cutting while managing thermal effects to avoid material damage, transforming a potential harm into a controllable manufacturing step
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 resulting w-BN drilling tools exhibit improved wear resistance, impact tolerance, and thermal stability, leading to extended tool life and increased reliability in drilling operations.
Implementation Method 1
An ultra-high-pressure, high-temperature operation is performed on pure w-BN powder to synthesize w-BN and cubic boron nitride (c-BN) compact
Implementation Method 2
pressurizing the w-BN powder to a pressure of approximately 20 Gigapascal
Implementation Method 3
The compact is cut into a plurality of cut compacts having a second size smaller than the first size using laser cutting tools
Implementation Method 4
The tool substrate with the plurality of inserted cut compacts is heated. After heating the tool substrate, the tool substrate with the plurality of inserted cut compacts is cooled to form the tool
Data Source
AI summary
Systems and methods include a computer-implemented method can be used to make drilling tools from new wurtzite boron nitride (w-BN) superhard material. An ultra-high-pressure, high-temperature operation is performed on pure w-BN powder to synthesize w-BN and cubic boron nitride (c-BN) compact having a first size greater than particles of the pure w-BN powder. The ultra-high-pressure, high-temperature operation includes pressurizing the w-BN powder to a pressure of approximately 20 Gigapascal, heating the w-BN powder at a heating rate of 100° C./minute and cooling the w-BN powder at a cooling rate of 50° C./minute. The compact is cut to a second size smaller than the first size using laser cutting tools. The cut compact is bonded metallurgically, mechanically, or both metallurgically and mechanically onto a tool substrate to form the drilling tool.