Push-the-Bit Rotary Steering with Near-Bit Gamma Measurement
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Solution Overview
Problem
Existing push-the-bit rotary steering tools face challenges in integrating additional measurement functions due to structural complexity, leading to increased measurement distance and delayed trajectory correction, and require larger hydraulic systems for increased deflecting capacity, which complicates design and application.
Innovation Solution
The push-the-bit rotary steering device integrates a gamma measurement module close to the drill bit, utilizes an electrical connection system with conductive sliding rings for stable power and signal transmission, and includes a stabilizer structure near the drill bit to enhance deflecting capacity without increasing hydraulic push force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additional measurement functions are integrated into the rotary steering tool, then measurement capability is improved, but measurement distance increases and trajectory correction is delayed
Solution Approach 1:
The rotary steering tool is divided into separate functional modules: a steering module with the hydraulic push module for trajectory control, and a separate while-drilling measurement instrument for gamma ray measurement. This segmentation allows the measurement instrument to be positioned closer to the drill bit while keeping the steering module compact, resolving the contradiction between measurement capability and measurement distance.
2Force
If the combined force of the hydraulic push module is increased to improve deflecting capacity, then steering capability is improved, but hydraulic system size increases
Solution Approach 1:
The patent changes the key parameter from hydraulic pressure to mechanical leverage by positioning the stabilizer structure closer to the drill bit. This reduces the required hydraulic push force while maintaining deflecting capacity, thereby reducing hydraulic system size without compromising steering capability.
3Force
If the stabilizer structure is positioned closer to the drill bit, then deflecting capacity is improved, but the hydraulic push force required is reduced
Solution Approach 1:
By changing the positional parameter of the stabilizer structure to be closer to the drill bit, the mechanical leverage is improved, which increases deflecting capacity while simultaneously reducing the required hydraulic push force. This resolves the apparent contradiction by optimizing the geometric parameter of the system.
Data Source
AI summary
The present disclosure relates to a push-the-bit rotary steering device, which includes: an upper driving shaft and a lower driving shaft being coaxially provided and fixedly connected, the upper driving shaft being provided with a circuit control module and a hydraulic push module sequentially on the outer peripheral wall of the upper driving shaft, the lower driving shaft being provided with a gamma measurement module on the outer peripheral wall, the gamma measurement module being provided with a measurement control circuit and an orientation measurement module electrically connected to the measurement control circuit; and an electrical connection system, which includes an electrical connection component, a communication module and a cable. The measurement control circuit is connected to the electrical connection component, the electrical connection component is connected to the circuit control module, and the circuit control module is connected to the hydraulic push module through the communication module.