Electromagnetic Gear Driven Push Type Rotary Guide Drilling System
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Solution Overview
Problem
The existing push type rotary guide drilling systems face challenges due to complex mechanical-electrical-hydraulic structures, which increase size, cost, and reduce flexibility, while also requiring costly sealing to prevent underground impurities from affecting electronic components and hydraulic mechanisms.
Innovation Solution
A push type rotary guide drilling system utilizing electromagnetic gear magnetic transmission for contactless power transfer, simplifying the structure by eliminating the need for mechanical-electrical-hydraulic components, and using a control unit to modulate the magnetic field for real-time adjustment of the drill bit posture, reducing the size and cost of the system while enhancing reliability and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If complex mechanical-electrical-hydraulic structures are used in the guide short joint, then the drilling system can achieve precise control of drill bit posture, but the device complexity and size increase significantly
Solution Approach 1:
The patent replaces the traditional mechanical-electrical-hydraulic integrated system with a purely mechanical structure. The guide short joint uses a mechanical push assembly with push blocks that directly push against the well wall to control drill bit posture, eliminating the need for complex electrical sensors, hydraulic actuators, and electronic control circuits while achieving the same steering function
Solution Approach 2:
The patent extracts and removes the electrical and hydraulic subsystems from the guide short joint, keeping only the essential mechanical components needed for steering. This extraction simplifies the overall structure by eliminating conductive slots, sealing systems for electronics, hydraulic fluid lines, and electronic control units, retaining only the mechanical push mechanism
2Extent of automation
If mechanical-electrical-hydraulic components are integrated in the guide short joint, then the system can achieve automated control, but the manufacturing cost and sealing requirements increase
Solution Approach 1:
The patent replaces automated electrical-hydraulic control systems with a mechanical control mechanism. The guide control is achieved through mechanical push blocks that physically push the well wall to change drill bit direction, eliminating the need for automated sensors, processors, and actuators that would require expensive sealing against underground impurities
Solution Approach 2:
The patent uses simple, inexpensive mechanical components that can be easily manufactured and replaced if needed. The push assembly consists of basic mechanical parts like push blocks and linkages that are much cheaper to manufacture than electrical-hydraulic systems, and their simple structure means lower sealing requirements and easier maintenance
3Measurement precision
If the guide short joint uses integrated mechanical-electrical-hydraulic systems, then the system can achieve precise measurement and control, but the reliability decreases due to more failure points
Solution Approach 1:
The patent replaces electrical measurement and control systems with mechanical alternatives. The well trajectory measurement and control are achieved through the mechanical response of the push assembly to well wall interactions, eliminating electronic sensors and control circuits that have multiple potential failure points
Solution Approach 2:
The mechanical push assembly is self-regulating and self-controlling. The push blocks automatically adjust their position and force based on mechanical interactions with the well wall and drill string, without requiring external electrical control signals or electronic feedback systems, thereby improving reliability through simplicity
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 achieves miniaturization, reduced sealing costs, improved reliability, and adaptability to harsh underground conditions, with adjustable output force and posture control, ensuring smooth and reliable operation.
Implementation Method 1
a driving electromagnetic gear arranged on the upper rotating shaft and a driven electromagnetic gear driven by the driving electromagnetic gear to rotate and arranged on the steering portion
Implementation Method 2
a control unit arranged on the upper rotating shaft, wherein the control unit is electrically connected to the driving electromagnetic gear and is configured to modulate a magnetic field
Data Source
AI summary
A push type rotary guide drilling system includes a drill bit and a rotating shaft, the rotating shaft including an upper rotating shaft and a lower rotating shaft; a steering portion, sleeving an outer side of the rotating shaft; a push assembly, including a plurality of push pieces spaced along a circumferential direction of the steering portion; a transmission device, including a transmission mechanism for driving the push pieces to extend out of the steering portion, the transmission mechanism including a driving electromagnetic gear arranged on the upper rotating shaft and a driven electromagnetic gear arranged on the steering portion and further including a motion conversion unit converting rotary motion of the driven electromagnetic gear into linear motion of the push pieces; and a control unit. The control unit is configured to modulate a magnetic field to make the driving electromagnetic gear and the driven electromagnetic gear realize linkage through magnetic coupling.