Particle Impact Drill Bit with Reamer Blades
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Solution Overview
Problem
Particle impact drill bits face challenges such as producing uneven boreholes, losing torsional and lateral stability, and difficulty in determining the drill bit's location relative to the borehole terminal, leading to potential damage from ricocheting impactors.
Innovation Solution
The design incorporates a reamer section with radially extending blades to stabilize the drill bit and apply weight-on-bit, allowing for monitored reactive torque and spacing from the borehole terminal to minimize damage, featuring a pilot section with converging nozzles for jet formation and a reamer section for mechanical expansion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a particle impact drill bit is used to drill into the formation, then drilling efficiency is improved, but the drill bit produces uneven boreholes and loses torsional and lateral stability
Solution Approach 1:
The drill bit is divided into functionally distinct sections: a pilot section with converging nozzles for particle jet generation and a reamer section with radially extending blades for mechanical expansion and stabilization. This segmentation allows each section to perform its specialized function optimally while working together to solve the stability and uniformity problems
Solution Approach 2:
The invention merges particle impact drilling with mechanical reaming in a single integrated drill bit design. The pilot section creates the initial borehole through particle impact while the reamer section simultaneously expands and stabilizes the borehole, combining two different drilling mechanisms into one unified system
2Productivity
If the drill bit operates close to the borehole terminal for maximum impact, then drilling effectiveness increases, but ricocheting impactors cause potential damage to the drill bit
Solution Approach 1:
By separating the pilot section (facing the terminal) from the reamer section (providing structural support), the design allows the pilot to operate close to the terminal for maximum impact effectiveness while the reamer's radial blades provide structural integrity and protection against ricochet damage
Solution Approach 2:
The reamer section acts as an intermediary protective structure between the particle impact zone and the drill bit body. The radially extending blades absorb and redirect ricocheting impactors, protecting the main drill bit structure from damage while allowing the pilot section to maintain optimal positioning
3Device complexity
If the drill bit is designed with only a pilot section for particle impact, then the structure is simpler, but weight application and torque monitoring become difficult
Solution Approach 1:
The addition of the reamer section with radially extending blades provides mechanical engagement with the borehole wall, enabling weight-on-bit application and torque monitoring while keeping the overall design relatively simple and modular
Solution Approach 2:
The reamer section serves multiple functions: it expands the borehole to final diameter, provides structural stability, enables weight application through mechanical engagement with the formation, and allows torque monitoring. This multi-functionality is achieved without significantly increasing overall device complexity
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 design achieves a consistent borehole sidewall, enabling effective weight application and torque monitoring, reducing drill bit wear and damage from ricocheting impactors, and maintaining stability during operation.
Implementation Method 1
each configured to emit a jet of the drilling fluid
Implementation Method 2
one or more first converging nozzles in fluid communication with the feed passage
Implementation Method 3
a reamer section comprising one or more reamer blades extending radially outwards from a central axis of the drill bit
Implementation Method 4
The drilling fluid, which may be water-based or oil-based, is typically viscous to enhance its ability to carry borehole cuttings to the surface
Data Source
AI summary
A particle impact drill bit for a well system includes a central axis, a longitudinal first end, a longitudinal second end opposite the first end, and a feed passage extending into the drill bit from the first end, a pilot section located at the second end, the pilot section including one or more converging nozzles in fluid communication with the feed passage, and a reamer section located between the first end and the second end and including one or more reamer blades extending radially outwards from the central axis of the drill bit, and wherein the reamer section defines a maximum width of the drill bit.