rotary support table

Test Your Knowledge

Rotary Support Table Quiz

Instructions: Choose the best answer for each question.

1. What is the primary function of a rotary support table? a) To rotate the drill bit b) To suspend the drill string during tripping c) To control the drilling fluid flow d) To provide power to the topdrive

2. Compared to traditional rotary tables, rotary support tables are: a) More complex and heavier b) Lighter and more compact c) More expensive and less efficient d) Primarily used in older drilling rigs

3. What is the main advantage of using rotary support tables in topdrive drilling? a) Eliminates the need for a topdrive b) Reduces the risk of drill string falling into the wellbore c) Improves the efficiency of drilling fluid circulation d) Increases the drilling depth capability

4. Which of the following is NOT a benefit of using a rotary support table? a) Increased efficiency during tripping b) Reduced weight on the rig floor c) Enhanced drilling fluid control d) Cost savings due to simplified design

5. Rotary support tables are most commonly used in conjunction with: a) Hydraulic drilling rigs b) Rotary drilling rigs c) Topdrive drilling rigs d) Conventional drilling rigs

Rotary Support Table Exercise

Scenario: You are working on a drilling rig that utilizes a topdrive system. During a tripping operation, the drill string suddenly begins to fall into the wellbore.

Task:

1. Identify the potential cause of this issue.
2. Explain how a rotary support table could have prevented this situation.
3. List two actions you would take to immediately address the situation and ensure the safety of the crew and equipment.

Techniques

Chapter 1: Techniques

Rotary Support Table Operation Techniques

The operation of a rotary support table is relatively straightforward, yet crucial for efficient drilling operations.

1. Drill String Suspension: The table's primary function is to securely suspend the drill string during tripping. This involves the following steps:

   • Setting the Slips: The slips, resembling large clamps, are securely set on the drill string using the table's hydraulic system.
   • Topdrive Release: The topdrive is then released from the drill string, allowing the string to be safely suspended by the slips on the rotary support table.

2. Drill String Connection: When connecting or disconnecting drill string sections, the rotary support table facilitates the process.

   • Slips Disengagement: The slips are disengaged using hydraulic controls, allowing the drill string to be freely manipulated for connection or disconnection.
   • Topdrive Engagement: Once the connection is completed, the topdrive is engaged to the drill string, and the slips are re-set to secure the string.

3. Rotation (Limited): While the primary purpose of a rotary support table is not rotation, some models offer limited rotation capabilities for minor adjustments during connection procedures. However, this functionality is rarely used.

Essential Safety Considerations

• Proper Slip Engagement: The slips must be correctly engaged to prevent the drill string from falling into the wellbore. This requires careful attention to slip settings and hydraulic pressure.
• Topdrive Release/Engagement: The release and engagement of the topdrive must be coordinated with the slips' status to ensure a smooth and safe transition.
• Operator Training: Operators must be thoroughly trained in the operation and safety procedures of the rotary support table.

Chapter 2: Models

Rotary Support Table Configurations

Rotary support tables come in various configurations, depending on their intended use and the specific rig requirements.

1. Standard Rotary Support Table: * Most common type, featuring a fixed platform with a built-in hydraulic system for slip operation. * Typically used on land drilling rigs.

2. Compact Rotary Support Table: * Smaller and lighter, ideal for offshore rigs or situations with limited deck space. * Designed for quicker setup and removal.

3. Integrated Rotary Support Table: * May be incorporated directly into the topdrive system for seamless operation. * Offers enhanced space efficiency and reduced setup time.

4. Rotary Support Table with Rotation Capabilities: * Some models offer limited rotation capabilities for minor adjustments during connection procedures. * This functionality is not standard and often used only for specific applications.

Key Features and Considerations

• Load Capacity: Rotary support tables are rated for specific load capacities depending on the drill string weight they are intended to support.
• Slip Design: The design of the slips varies based on drill string size and operational requirements.
• Hydraulic System: The hydraulic system provides power for slip engagement and disengagement, with varying pressure ratings depending on the table's capacity.
• Safety Features: Safety features like emergency release mechanisms, pressure sensors, and limit switches are essential for safe operation.

Chapter 3: Software

Rotary Support Table Software Integration

While software integration is not always present, increasingly rotary support tables are being integrated with rig automation systems.

1. Remote Control & Monitoring: * Allows operators to control the table functions (slips, rotation) from a remote control panel. * Provides real-time monitoring of table status, pressure readings, and safety parameters.

2. Data Logging and Reporting: * Records crucial operational data, including slip settings, hydraulic pressures, and connection times. * Generates reports for analysis, providing insights into table performance and potential areas for optimization.

3. Integration with Drilling Software: * Seamless integration with drilling management software allows for synchronized data flow and optimized operational procedures. * Enables smoother transitions between tripping and drilling operations.

4. Advanced Diagnostics and Alerts: * Software-based diagnostics can detect potential issues and alert operators to potential problems before they escalate. * Improves preventive maintenance and minimizes downtime.

Chapter 4: Best Practices

Optimizing Rotary Support Table Performance

1. Pre-Operational Inspection: Always conduct thorough pre-operational inspections to ensure all components are in good working order, including hydraulic system, slips, and control systems.
2. Proper Training: Ensure operators are thoroughly trained in the operation, safety procedures, and maintenance of the rotary support table.
3. Correct Slip Settings: Set slips correctly according to the drill string size and weight to ensure secure suspension and prevent accidental slippage.
4. Regular Maintenance: Implement a scheduled maintenance program for the rotary support table, including hydraulic system checks, slip inspections, and lubrication.
5. Data Analysis: Utilize data logging and analysis software to track table performance, identify potential issues, and optimize operation.

Safety Considerations

• Emergency Release Mechanisms: Always ensure the emergency release mechanisms are functional and readily accessible in case of a hydraulic failure.
• Pressure Monitoring: Continuously monitor hydraulic pressures and alarms to identify potential problems and take corrective action.
• Communication & Coordination: Maintain clear communication between the rotary support table operator, topdrive operator, and drilling crew for safe and efficient operations.

Chapter 5: Case Studies

Rotary Support Table Applications and Success Stories

• Increased Drilling Efficiency: Case studies show that rotary support tables significantly contribute to drilling efficiency by reducing tripping time and enhancing connection procedures.
• Enhanced Safety Record: In several applications, the use of rotary support tables has improved safety by eliminating the need to use the topdrive for drill string suspension, reducing potential hazards.
• Cost Savings: The simplified design and reduced weight of rotary support tables compared to traditional rotary tables have resulted in cost savings for drilling operations.

Case Study Examples

• Offshore Drilling: In offshore environments, where space is limited, compact rotary support tables have been deployed to provide efficient drill string handling and minimize deck clutter.
• High-Pressure Drilling: In high-pressure drilling environments, the reliable operation of rotary support tables is crucial for ensuring safe drill string handling and preventing potential well control incidents.

These case studies demonstrate the significant contributions of rotary support tables to the safety, efficiency, and cost-effectiveness of modern drilling operations.