Dynamic Testing Device for Drilling Tool Attitude Measurement
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Solution Overview
Problem
Current drilling tool attitude measurement systems, such as MWD systems, are inefficient and costly due to their reliance on static measurements, and existing calibration and testing devices are unable to simulate the dynamic rotation state of drilling tools, limiting their ability to perform continuous and real-time attitude parameter measurement.
Innovation Solution
A dynamic testing device with a main structure composed of orthogonal horizontal and vertical planes, capable of independently adjusting azimuth, inclination, and toolface angles, and rotating at high speeds up to 500 rpm, allowing for the simulation of downhole drilling tool conditions for dynamic testing of attitude measurement modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If static measurement using MWD system is used, then accurate attitude parameters can be obtained, but drilling operation must be stopped resulting in low time efficiency
Solution Approach 1:
The patent transforms the measurement system from static to dynamic by enabling the drill bit to rotate during measurement. The dynamic measurement module captures attitude parameters (azimuth, inclination, toolface angles) continuously during rotation, eliminating the need to stop drilling operations while maintaining measurement accuracy through rotational averaging algorithms.
2Measurement precision
If manual three-axis non-magnetic turntable is used for calibration, then static calibration can be performed, but dynamic testing at rotation speed cannot be achieved
Solution Approach 1:
The calibration device evolves from manual static adjustment to automated dynamic rotation. The turntable system incorporates motors to rotate the drill bit along with the module under test, enabling dynamic calibration and testing during rotation. This allows verification of measurement accuracy under actual drilling conditions while maintaining calibration precision.
Solution Approach 2:
Manual mechanical dial reading is replaced with electronic sensors and automated control systems. The system uses electronic encoders, motors, and control algorithms to automatically adjust and verify attitude parameters during dynamic rotation, replacing the purely mechanical manual operation with electromechanical automation.
3Ease of operation
If electric three-axis non-magnetic turntable is used, then electrical adjustment is achieved, but the structure cannot operate stably under large weight and high rotation speed
Solution Approach 1:
The patent addresses the weight stability issue by designing a rigid support structure with counterbalancing mechanisms. The turntable system incorporates heavy-duty bearings and counterweights to compensate for the large weight of the drill bit and module under test, maintaining structural stability during high-speed rotation up to 500 rpm.
Solution Approach 2:
The design incorporates spherical or cylindrical rotation joints that distribute mechanical loads more evenly during rotation. The curved geometry of the rotation axes and support structures reduces stress concentrations and improves dynamic stability under high rotation speeds and heavy weights.
4Stability of the object's composition
If taper sleeve nut fixation is used for toolface shaft, then fixed structure is achieved, but it is only suitable for regular round rod shape modules
Solution Approach 1:
The fixation system is designed with universal adaptability to accommodate different module shapes and sizes. Instead of taper sleeve nuts limited to round rods, the system uses adjustable clamps, modular fixtures, and standardized mounting interfaces that can secure various geometries of attitude measurement modules while maintaining stable fixation during rotation.
Data Source
AI summary
The disclosure relates to the field of drilling tool attitude measurement, and particularly to a dynamic testing device suitable for a drilling tool attitude measurement module. The dynamic testing device may comprise a test fixture for attitude measurement module, an azimuth rotation device for adjusting an azimuth angle, an inclination angle swing device for adjusting an inclination angle, and a toolface angle rotation device for driving the test fixture for attitude measurement module to rotate, and a rotation speed measurement device for measuring a rotation speed and a self-rotation angle of the test fixture for attitude measurement module in a rotating state. The testing device has characteristics of large bearing weight, high rotation speed which is measurable and controllable, convenient for mounting and fixing a tested module, etc. It can simulate conditions of downhole rotation of a drilling tool, and be used for dynamic testing of the attitude measurement module.