Intelligent Directional Device for Drill String Full Rotation
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Solution Overview
Problem
Current directional drilling technologies face challenges such as low drilling efficiency, mechanical issues, and high costs, particularly in deep wells with complex geology.
Innovation Solution
An intelligent directional device that enables full rotation of the drill string, featuring a drive assembly with a rotating motor and a control system, allowing for compound drilling and directional drilling modes to improve control and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If curved screw directional drilling technology is used, then cost is reduced and use is convenient, but drilling efficiency is low and mechanical drilling rate is low
Solution Approach 1:
The invention applies dynamics by enabling the drill string to rotate freely during directional drilling, transforming the static sliding drilling mode into a dynamic rotary drilling mode. This allows the drill bit to rotate and cut rock continuously, dramatically improving drilling efficiency while maintaining the cost advantages of curved screw technology through the use of a simple rotating mechanism rather than complex equipment
Solution Approach 2:
The invention segments the drilling system into independent functional modules: the drill string rotation mechanism, the directional control system, and the drill bit assembly. This segmentation allows the drill string to rotate independently while the directional control system maintains precise trajectory control, resolving the contradiction between simple operation and drilling efficiency
2Ease of manufacture
If curved screw directional drilling technology is used, then cost is reduced, but hole trajectory control is difficult
Solution Approach 1:
The invention incorporates a feedback mechanism where sensors continuously monitor the drill string position and orientation, and this information is fed back to the control system. The control system adjusts the drill string rotation and directional control in real-time based on this feedback, achieving precise hole trajectory control while maintaining the cost-effectiveness of the curved screw technology approach
3Productivity
If rotary steerable drilling technology is used, then drilling efficiency is improved, but manufacturing cost is high and maintenance cost is high
Solution Approach 1:
The invention adopts a simplified rotary mechanism that uses more affordable, easily replaceable components rather than expensive, complex rotary steerable system equipment. The drill string rotation system employs basic mechanical elements that can be manufactured at lower cost and replaced if needed, achieving high drilling efficiency without the high manufacturing and maintenance costs of traditional rotary steerable technology
4Productivity
If rotary steerable drilling technology is used, then drilling efficiency is improved, but risk of being buried is high
Solution Approach 1:
The invention implements beforehand cushioning by continuously rotating the drill string during directional drilling, which prevents cuttings from accumulating and causing sticking or burying of the drill string. This continuous rotation maintains a clear annulus between the drill string and wellbore, eliminating the risk of being buried while achieving high drilling efficiency, and does so with a simpler, more reliable mechanism than traditional rotary steerable systems
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 intelligent directional device enhances drilling efficiency, reduces the risk of accidents, and lowers operational costs by providing precise control and stable operation during directional drilling.
Implementation Method 1
a lithium-ion battery pack (6)
Implementation Method 2
a rotating motor (8)
Implementation Method 3
a ball screw (14)
Implementation Method 4
a cylindrical roller bearing (11)
Data Source
AI summary
An electronically controlled full rotary clutch controller includes a drive assembly, an executive assembly and an auxiliary assembly. The device can have two working states: directional drilling and compound drilling. When compound drilling, drilling parameter information is obtained through the main control board, and the data is fed back to a ground processing system, which transmits a control signal to the main control board. The main control board controls a rotating motor, and pushes a screw sleeve and a push block shaft on a ball screw. The push block shaft pushes a push block radially, and a mandrel shell transmits torque to a roller shell through the push block. The roller shell and the mandrel shell rotate together to realize compound drilling. When directional drilling, the main control board reverses the rotary motor, the push block shaft pulls the push block radially, and the roller shell does not rotate.