Dongsu Successfully Delivers Intelligent Well Control Equipment Testing & Maintenance System for COSL

Recently, Dongsu completed the design, integration, and delivery of an Intelligent Well Control Equipment Testing & Maintenance System for China Oilfield Services Limited (COSL). The project marks another milestone in Dongsu’s technical collaboration with leading offshore drilling operators and demonstrates the company’s capability in providing advanced, high-pressure testing and maintenance solutions for critical well control equipment.

A Tailored Solution for COSL’s Rigorous Well Control Requirements

COSL operates large fleets of offshore drilling rigs and requires reliable systems to ensure the safety and operability of Blowout Preventers (BOPs), valves, choke & kill manifolds, and other high-pressure components. To address these needs, Dongsu designed a custom-built high-pressure testing system that includes:

• 200 MPa / 29,000 PSI High-Pressure Test System
• Integrated Control Room + Independent Testing Bay
• Automated Data Acquisition and Pressure Curve Recording
• Safety-Isolated Test Chamber with Reinforced Steel Structure
• Custom Logic Control System for Multi-Scenario Pressure Testing

The solution supports a complete range of well control equipment testing, including shell tests, function tests, pressure cycle tests, and hydraulic system evaluation.

Ensuring Safety Through Engineering Excellence

To guarantee maximum safety during ultra-high-pressure operations, the testing system incorporates multiple design layers:

• Reinforced isolation test room with thickened steel walls
• Remote-control operation from a separate control room
• Automated pressure relief and emergency shutdown features
• Real-time monitoring of pressure, temperature, flow, and system status

These designs allow operators to perform high-pressure tests under strict safety control, significantly reducing operational risk and ensuring compliance with both COSL standards and international well control regulations.

Streamlined Operation With Intelligent Control Software

Dongsu equipped the system with a digitally integrated control platform, enabling:

• One-click pressure control
• Automated recording of pressure curves
• Fault diagnosis and system alarms
• Test report generation for auditing and maintenance tracking

The intelligent platform improves testing efficiency, enhances accuracy, and provides COSL with better traceability for long-term well control asset management.

Modular, Mobile, and Designed for Harsh Offshore Environments

The entire system is built using a modular container-based structure, allowing COSL to deploy it easily across different offshore bases. The structure provides:

• Fast installation and relocation
• Compact layout suitable for space-limited offshore environments
• Weather-resistant construction meeting marine-grade standards

This mobility ensures that testing and maintenance work can be carried out closer to operational sites, reducing equipment downtime and logistics costs.

Strengthening COSL’s Well Control Safety Assurance

With the deployment of Dongsu’s intelligent testing system, COSL now benefits from:

• More efficient BOP and high-pressure equipment inspection
• Improved maintenance quality
• Higher safety levels during pressure testing
• Enhanced lifecycle management of critical well control assets

This system significantly improves COSL’s capability to maintain well control equipment at a high operational standard, supporting its long-term safety and reliability commitments.

Dongsu’s Continued Commitment to the Oil & Gas Industry

As a professional provider of well control equipment, pressure testing systems, and BOP control solutions, Dongsu continues to support global drilling contractors with reliable engineering and integrated service capabilities.

This successful project with COSL once again verifies Dongsu’s expertise in delivering customized, high-performance solutions for complex offshore operational environments.