Active Magnetic Ranging BHA Magnetometer Integration
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Solution Overview
Problem
Traditional magnetic ranging systems in drilling operations require significant downtime and wireline access to measure distances and directions, limiting efficiency and increasing drilling risks due to the need for static open hole operations during ranging measurements.
Innovation Solution
The integration of bi-directional measurement-while-drilling (MWD) systems with ranging magnetometers into the drilling assembly, allowing for active magnetic ranging during drilling operations without the need for wireline access, using a combination of gradient magnetometer arrays, downhole current injection systems, and MWD telemetry interfaces to collect and transmit data in real-time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional wireline-based magnetic ranging is used, then measurement precision is achieved, but drilling productivity decreases due to required downtime and static open hole operations
Solution Approach 1:
The patent combines the ranging magnetometer with the MWD system and drilling assembly into an integrated package. The magnetometer is positioned within the BHA alongside the MWD tools, allowing ranging measurements to be taken during normal drilling operations without requiring separate wireline runs or static open hole operations, thus resolving the contradiction between measurement precision and drilling productivity
Solution Approach 2:
The system enables continuous ranging measurements to be taken during active drilling operations. The magnetometer remains operational throughout the drilling process, eliminating the need to stop drilling for ranging shots. This continuous measurement capability maintains drilling productivity while providing accurate ranging data, directly addressing the contradiction between measurement precision and productivity
2Measurement precision
If traditional wireline tool deployment is used for ranging, then measurement accuracy is achieved, but loss of time increases due to multiple tripping operations and setup requirements
Solution Approach 1:
The ranging magnetometer is pre-installed within the BHA during the drilling operation, eliminating the need for subsequent wireline deployment. The system is ready to perform ranging measurements immediately upon activation, avoiding the time-consuming process of tripping out the drill string, deploying wireline tools, and then re-tripping to resume drilling. This preliminary positioning of the measurement device directly reduces time loss while maintaining measurement accuracy
Solution Approach 2:
The integrated system allows the drilling assembly to perform ranging measurements as part of its normal operation. The magnetometer within the BHA can activate ranging shots and collect data without requiring external wireline support or additional tripping operations. This self-service capability eliminates the time loss associated with traditional wireline deployment while preserving measurement precision
3Reliability
If static open hole operations are required for ranging, then measurement reliability is achieved, but drilling productivity decreases due to operational interruptions
Solution Approach 1:
The system transitions from static open hole operations to dynamic measurement collection during active drilling. The magnetometer can activate ranging shots at any time during drilling operations, and the system dynamically adjusts measurements based on real-time drilling conditions. This dynamic approach maintains measurement reliability while eliminating the need to stop drilling, thus preserving productivity
Solution Approach 2:
The patent enables continuous drilling operations without interruption for ranging measurements. The magnetometer remains operational throughout the drilling process, allowing ranging shots to be taken while the drill string is in the hole and drilling is ongoing. This continuity eliminates the productivity loss associated with static open hole operations while maintaining reliable measurement data
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 continuous ranging measurements during drilling cycles, reducing downtime and drilling risks by eliminating the need for static open hole operations and allowing for on-demand ranging shots, thereby improving drilling efficiency and accuracy.
Implementation Method 1
The magnetic ranging system may include at least two ranging magnetometers, with one ranging magnetometer positioned above the MWD system and one ranging magnetometer positioned below the MWD system
Implementation Method 2
The magnetic ranging system may further include an injection electrode and a return electrode above the injection electrode. The injection electrode may be configured to inject current into the formation
Data Source
AI summary
A magnetic ranging system for use with a drilling assembly in a borehole in a formation, the drilling assembly including a drill string, a drill bit and a bottomhole assembly (BHA) connected to the drill bit, the BHA including a measurement-while-drilling (MWD) system, a bi-directional MWD telemetry interface, and a steerable component, may comprise at least one ranging magnetometer incorporated into the BHA. The ranging magnetometer may be configured to collect ranging measurements from behind the drill bit and the ranging magnetometer may be configured to transmit measurement data. The magnetic ranging system may include at least two ranging magnetometers, with one ranging magnetometer positioned above the MWD system and one ranging magnetometer positioned below the MWD system.