Drill Bit with Packer and Valve for Simultaneous Drilling Fracturing
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Solution Overview
Problem
Current drilling technologies face challenges in simultaneously drilling a wellbore and fracturing subterranean formations efficiently, as they often require separate processes and equipment for drilling and fracturing, which can lead to inefficiencies and limitations in hydrocarbon extraction.
Innovation Solution
An earth boring bit with a selectively deployable packer and valve assembly that allows for both drilling and fracturing operations by controlling fluid communication through a chamber and nozzles, enabling the bit to switch between drilling and fracturing modes using fluid pressure, and includes a packer that expands radially for sealing and fracturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If separate processes and equipment are used for drilling and fracturing, then each process can be optimized independently, but operational efficiency decreases and equipment complexity increases
Solution Approach 1:
The patent combines drilling and fracturing operations into a single integrated bit assembly. The bit includes both drilling nozzles for cutting the wellbore and fracturing nozzles for creating formation fractures, along with a packer system that can seal the wellbore. This merging eliminates the need for separate drilling and fracturing equipment, allowing both operations to be performed simultaneously through the same tool, thereby improving operational efficiency while managing equipment complexity through integration.
2Reliability
If a packer is deployed for fracturing, then sealing effectiveness improves, but device complexity and operational steps increase
Solution Approach 1:
The packer system in the patent serves multiple functions: it seals the wellbore during fracturing operations to contain pressure, and can be deployed or retracted as needed. The same bit assembly that performs drilling also houses the packer mechanism, eliminating the need for separate packer deployment tools. This multi-functionality approach improves sealing reliability while avoiding the added complexity of entirely separate systems.
Solution Approach 2:
The valve assembly within the bit automatically controls fluid flow between drilling and fracturing modes. When the packer is deployed, the valve system self-regulates to direct fluid pressure to the fracturing nozzles rather than the drilling nozzles, eliminating the need for complex external control systems. This self-service mechanism simplifies operation while maintaining reliable sealing and fracturing performance.
3Productivity
If simultaneous drilling and fracturing is enabled, then operational efficiency improves, but control complexity and fluid management difficulty increase
Solution Approach 1:
The bit assembly is designed with dynamic capabilities, allowing the packer to be deployed or retracted and the valve assembly to switch between drilling and fracturing modes as needed. This dynamic design enables the system to adapt between different operational states (drilling only, fracturing only, or simultaneous operations) without requiring entirely different equipment, thereby improving productivity while managing control complexity through a single adaptable tool.
Solution Approach 2:
The valve assembly acts as an intermediary mechanism that controls fluid distribution between the drilling nozzles and fracturing nozzles. By positioning the valve within the bit itself, the system achieves precise control over fluid flow without requiring complex external valve systems. This intermediary component simplifies fluid management while enabling flexible switching between drilling and fracturing modes, improving operational efficiency.
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
Enables simultaneous drilling and fracturing, improving hydrocarbon extraction by creating fractures in the formation while drilling, enhancing the flow of hydrocarbons to the wellbore and maintaining effective sealing to prevent sand or particulate matter from entering the wellbore.
Implementation Method 1
a selectively expandable packer disposed on the bit, so that when the packer is in communication with pressurized fluid in the drill string, the packer expands radially outward into sealing contact with an inner surface of a wellbore
Implementation Method 2
the valve assembly is moveable from the drilling position to the fracturing position by flowing a designated amount of fluid through the drill string and into the drill bit
Implementation Method 3
a spring in the chamber on an end of the sleeve for moving the valve assembly from the fracturing position to the drilling position
Implementation Method 4
an end of the plunger seals an interface between the exit nozzle and the chamber
Data Source
AI summary
A drill bit for use in drilling a wellbore and that can be used for fracturing the subterranean formation surrounding the wellbore. Included on the bit body is a packer for sealing against the wellbore wall during fracturing. A chamber in the drill bit houses a valve assembly for selectively diverting fluid between use in drilling and for use in fracturing. The fluid is delivered through a drill string that attaches to an upper end of the bit. The valve assembly can be shuttled between drilling and fracturing configurations by selectively adjusting an amount and/or pressure of the fluid flowing in the drill string.