Automated Slide Mode Detection Using Torque and RPM
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Solution Overview
Problem
In downhole drilling, determining whether the drilling rig is in slide mode or rotating mode is challenging due to conflicting techniques and poor data quality, which affects the orientation of the drill bit and the trajectory of the well.
Innovation Solution
A method that receives drilling condition inputs from sensors, obtains slide mode determinations based on rotational speed and torque, selects the appropriate determination based on input conditions, and calculates steering parameters to execute drilling operations effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple techniques are used to determine drilling mode, then measurement reliability may improve, but conflicting determinations and data quality issues worsen the accuracy
Solution Approach 1:
The patent segments the drilling mode determination process into distinct analysis paths: one path uses rotational speed data while another uses torque data. Each segment independently evaluates drilling mode based on its specific data type, avoiding the conflict that arises when multiple techniques are combined into a single determination process. The system selectively applies the appropriate segment based on data quality and drilling conditions.
Solution Approach 2:
The patent changes the parameter basis for determination by switching between rotational speed-based analysis and torque-based analysis depending on the drilling conditions and data quality. This parameter switching allows the system to adapt to different measurement conditions and avoid using parameters that may lead to conflicting determinations, thereby improving both reliability and precision.
2Reliability
If drillstring friction and drag increase with hole depth, then weight on bit transfer becomes more difficult, but maintaining trajectory control becomes more critical
Solution Approach 1:
The patent implements feedback mechanisms that continuously monitor drilling parameters including weight on bit, rotational speed, and torque. This feedback allows the system to detect when friction and drag are affecting weight transfer efficiency, and to adjust drilling operations accordingly. The feedback loop ensures trajectory control reliability by maintaining awareness of the actual drilling state despite increasing depth-related challenges.
Solution Approach 2:
The patent applies dynamic adjustment of drilling parameters based on real-time conditions. As hole depth increases and friction increases, the system dynamically modifies operational parameters such as rotational speed and weight on bit to maintain effective drilling. This dynamic approach makes the system adaptable to the changing ease of operation conditions with depth.
3Manufacturing precision
If slide mode drilling is used to steer the wellbore, then trajectory control improves, but mud motor stalling risk increases
Solution Approach 1:
The patent performs preliminary analysis of drilling conditions before initiating or continuing slide mode drilling. By evaluating parameters such as torque, rotational speed, and formation characteristics in advance, the system identifies conditions that may lead to mud motor stalling. This preliminary action allows operators to adjust parameters or switch to rotating mode before stalling occurs, maintaining both trajectory precision and motor reliability.
Solution Approach 2:
The patent implements preliminary anti-action by monitoring for conditions that precede mud motor stalling and taking corrective action before the stalling occurs. The system detects early signs of problematic conditions such as excessive torque or insufficient rotational speed, and adjusts operations to prevent stalling. This proactive approach maintains trajectory control while preventing reliability issues.
Data Source
AI summary
A method includes receiving at least one drilling condition input from at least one sensor of a drilling rig, obtaining a first slide mode determination based at least partially on a rotational speed of a drill string, obtaining a second slide mode determination based at least partially on torque applied to the drill string, selecting one of the first or second slide mode determinations based on the at least one drilling condition input, determining that the drilling rig is in slide mode based on the selected one of the first or second slide mode determinations, calculating at least one steering parameter based at least in part on determining that the drilling rig is in slide mode, and executing at least one drilling operation based in part on the at least one steering parameter.