Drill String Angular Offset Measurement for Accurate RFO
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Solution Overview
Problem
Inaccurate calculation of the rig floor offset (RFO) in directional drilling can lead to suboptimal well paths or Health, Safety, and Environment (HSE) risks due to errors in measurement and communication of angular offset between the motor highside and MWD highside reference points.
Innovation Solution
Utilizing an electronic device with sensors such as magnetometers, accelerometers, and gyroscopes to directly measure the angular offset between reference points on the drill string, eliminating the need for attachment to the drill string and reducing personnel training requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional methods are used to calculate or enter RFO offset values, then the process requires multiple personnel and manual operations, but errors in measurement and communication occur leading to inaccurate RFO offset values
Solution Approach 1:
The patent replaces manual mechanical measurement and communication processes with an electronic device that uses sensors (magnetometer, accelerometer, gyroscope) to automatically determine angular offset. The electronic device calculates the RFO offset value electronically and transmits it directly to the drilling system, eliminating manual measurement, communication, and data entry steps that were prone to human error.
2Reliability
If manual measurement and communication methods are used, then personnel training is required and more personnel are needed, but this increases the risk of errors in transferring references and entering information
Solution Approach 1:
The electronic device performs self-service by automatically measuring the angular offset between reference points using its onboard sensors, calculating the RFO offset value, and transmitting the result without requiring manual intervention. This eliminates the need for personnel to transfer references manually or enter data, reducing both training requirements and error risks.
3Measurement precision
If attachment to drill string is required for measurement, then accurate reference point alignment can be achieved, but this increases personnel requirements and creates HSE risks
Solution Approach 1:
The patent introduces an intermediary approach by using the electronic device to measure angular offset between reference points that are visually identified on the drill string components, without requiring physical attachment to the drill string itself. The device obtains orientation values by positioning adjacent to reference points and calculating the angular offset mathematically, thereby maintaining measurement accuracy while eliminating HSE risks associated with attachment procedures.
4Productivity
If multiple personnel are used for measurement and communication, then comprehensive monitoring is possible, but non-productive time increases due to coordination and communication requirements
Solution Approach 1:
The electronic device accelerates the RFO offset determination process by using its sensors to quickly obtain orientation values and automatically calculate the angular offset, significantly reducing the time required compared to manual measurement and communication methods. The device transmits the result directly to the drilling system, eliminating time-consuming coordination and data entry steps.
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
Improves accuracy of RFO measurements, reduces HSE risks, minimizes non-productive time, and decreases the number of personnel needed for drilling operations by providing a straightforward and precise method for determining angular offset.
Implementation Method 1
obtain a first orientation value using the electronic device; obtain a second orientation value using the electronic device
Implementation Method 2
obtain a first orientation value using the electronic device; obtain a second orientation value using the electronic device
Implementation Method 3
obtain a first orientation value using the electronic device; obtain a second orientation value using the electronic device
Data Source
AI summary
Systems and methods to determine angular offset between reference points on a drill string are achieved automatically using an electronic device, such as a handheld device. A first orientation value corresponding to the first highside reference point is obtained using the electronic device. A second a second orientation value corresponding the second highside reference point is obtained. The electronic device then calculates the angular offset between the first and second orientation values.