Ground Testing Device for Rotary Steerable Drilling Stabilized Platform
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Solution Overview
Problem
Current technologies lack a comprehensive ground testing method for mechanical stabilized platforms of rotary steerable drilling tools, particularly for double-turbine generator stabilized platforms, which are challenging due to high-temperature and high-vibration environments and complex torque control requirements, leading to difficulties in simulating downhole conditions effectively.
Innovation Solution
A ground testing device with a drill collar assembly, vibration mechanism, interference loading assembly, and control unit that simulates downhole vibrations, high-temperature environments, and torque interference, allowing for the testing of various mechanical stabilized platforms, including double-turbine generator systems, with a dual-layer control design for improved control performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a mechanical stabilized platform is used, then measurement accuracy is improved, but the device complexity and investment cost increase due to the need for hydraulic circulation system
Solution Approach 1:
The patent extracts the turbine generators from the hydraulic circulation system and mounts them directly on the stabilized platform. This removes the complex hydraulic circulation infrastructure while retaining the essential function of driving turbine generators for stabilization and power generation
Solution Approach 2:
The patent creates a simplified ground testing device that copies the essential functions of the downhole stabilized platform without replicating the full hydraulic circulation system. The ground testing device uses a simplified mounting structure that reproduces the key operational characteristics for testing purposes
2Use of energy by moving object
If a double-turbine generator stabilized platform is used, then independent power generation capacity is improved, but control difficulty increases due to interaction between upper and lower turbine generators
Solution Approach 1:
The patent segments the control of the double-turbine generator system into independent control channels. The upper and lower turbine generators are controlled separately through independent mounting and control mechanisms, allowing each turbine to be adjusted and tested independently without complex interactions
Solution Approach 2:
The patent introduces dynamic adjustment capabilities through the ground testing device, allowing real-time modification of turbine generator parameters such as rotational speed and electromagnetic torque. This enables flexible control strategies to manage the interaction between upper and lower turbines during testing
3Ease of manufacture
If the stabilized platform is directly placed on the drilling tool for testing, then testing simplicity is improved, but material consumption increases and detailed working state cannot be obtained
Solution Approach 1:
The patent introduces a ground testing device as an intermediary between the stabilized platform and the drilling tool. This intermediate testing platform allows detailed observation and measurement of the stabilized platform's working state without requiring actual downhole conditions or consuming drilling materials
Solution Approach 2:
The ground testing device creates a simplified copy of the downhole testing environment, reproducing essential mechanical and operational characteristics while eliminating the need for actual drilling operations and material consumption
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 accurate simulation of downhole conditions, including vibrations and high temperatures, and improves control performance of stabilized platforms by allowing for real-time adjustment of electromagnetic torque, facilitating ground testing without the need for a drilling fluid circulation system, thus enhancing the controllability and efficiency of experiments.
Implementation Method 1
an elastic member is arranged between the second vibration member and the second supporting member... in a rotation process of the drill collar, the second vibration teeth are separated from the first vibration teeth and meshed with the first vibration teeth under an action of the elastic member, so as to automatically open and close to generate vibration
Implementation Method 2
the torque of the stabilized platform is balanced by adjusting the electromagnetic torque of the upper turbine generator and the lower turbine generator, such that the stabilized platform is geostationary
Implementation Method 3
one end of the pressurizing member is in close contact with the friction member to generate interference torque
Data Source
AI summary
The present invention belongs to the technical field of oil field drilling, and relates to a ground testing device for a stabilized platform of a rotary steerable drilling tool. The ground testing device includes: a first supporting member and a second supporting member that are oppositely arranged, where the second supporting member is provided with a first mounting hole; a drill collar and a drill collar motor mounted outside the first supporting member, where a motor shaft of the drill collar motor penetrates the first supporting member and is connected to the drill collar, and a stabilized platform mounting assembly is arranged inside the drill collar; and a first vibration member connected to the drill collar and a second vibration member arranged in the first mounting hole in a sleeved manner, where an elastic member is arranged between the second vibration member and the second supporting member, and the elastic member is arranged on the second vibration member in a sleeving manner. An end portion of the first vibration member is provided with first vibration teeth, an end portion of the second vibration member is provided with second vibration teeth matching the first vibration teeth, and the second vibration member is provided with a first stop member which matches a second stop member arranged in the first mounting hole. According to the present invention, vibration, interference loading, and high-temperature simulation can be performed, and ground tests of different types of mechanical stabilized platforms are achieved.