Steerable Drill Bit Shaft Ball Actuator Steering
Solution Overview
Problem
Current directional drilling technologies face challenges in maintaining precise control over drilling direction, especially in deviated wellbores, due to unpredictable formation conditions and varying forces, leading to inefficiencies and increased wear.
Innovation Solution
A steerable system utilizing ball actuators with pressurized fluid control, allowing for controlled movement of balls within ball sleeves to pivot the drill bit shaft, enabling precise directional control and reducing susceptibility to wear and pressure variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional directional drilling technologies are used, then drilling operations can be performed, but precise control over drilling direction is lost due to unpredictable formation conditions and varying forces
Solution Approach 1:
The patent replaces traditional mechanical steering mechanisms with a hydraulic actuation system. Ball actuators mounted on the drill bit shaft are controlled by pressurized fluid delivered through a hose from the surface, enabling precise directional control without relying on mechanical linkages that are susceptible to formation conditions and varying forces.
Solution Approach 2:
The patent employs a hydraulic control system where pressurized fluid is used to actuate balls within ball actuators. The fluid pressure is controlled from the surface to move the balls in specific directions, providing reliable and precise steering control that is independent of downhole mechanical conditions.
2Adaptability or versatility
If traditional steerable systems are employed, then directional drilling is achieved, but wear and susceptibility to pressure variations increase
Solution Approach 1:
The patent eliminates complex mechanical steering linkages by using hydraulic actuation. The ball actuators with pressurized fluid control replace traditional mechanical steering components, reducing wear and improving resistance to pressure variations while maintaining adaptability for directional control.
Solution Approach 2:
The patent introduces a fluid hose as an intermediary to transmit control signals from the surface to the downhole actuators. This intermediary allows precise control without direct mechanical connection, reducing wear on downhole components and improving system durability against pressure variations.
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 system provides high dog leg capability and improved resistance to wear, temperature, and pressure, facilitating more accurate directional drilling and reducing the risk of drill bit deviation, thereby enhancing drilling efficiency and access to subterranean hydrocarbon reservoirs.
Implementation Method 1
Pressurized fluid is used to provide controlled movement of the balls along the corresponding ball sleeves of the actuators
Data Source
AI summary
A technique facilitates drilling of wellbores or other types of bore holes in a variety of applications. A steerable system or other well tool is designed with a plurality of actuators which are positioned to provide controlled steering during a drilling operation. Each actuator includes at least one loose element or ball slidably mounted in a corresponding sleeve. Pressurized fluid is used to provide controlled movement of the elements along the corresponding sleeves of the actuators. The controlled movement of the elements assists in the provision of steering or other control over the well tool during the drilling operation.