Design technologies

The Company has developed a complete set of world-class technologies for the design of large fixed platforms and jackets operating in 300m-deep waters. And it. These technologies have reached the international leading level, and some of them have exceeded the international leading level. The Company has has overcome a series of technical challenges in the design of submarine pipelines and flow assurance under extreme sea conditions and complex geological conditions and, mastered the technologies for submarine pipeline systems in moderate depth and shallow waters with, well-establisheded the engineering and technology system for submarine oil and gas pipelines. Furthermore,, developed the technologies for the design of floating equipment for the development of deepwater oil and gas fields in 1,500m-deep waters ands, fully developed the capability to design FPSO units and semi-submersible platforms are fully developed , and allowbuilt the design preliminary capability for the design  of 1,500 m deepwater and shallow-water subsea production systems to be well strengthened. Its cCore technical capabilities include:

　　　　　　　　　　Design of 300 m deepwater jackets;

　　　　　　　　　　Design of semi-submersible production platforms;

　　　　　　　　　　Design of FPSO units;

　　　　　　　　　　Design of subsea production systems and products;

　　　　　　　　　　Design of subsea pipelines and cables;

　　　　　　　　　　Design of single-point mooring systems;

　　　　　　　　　　Design of intelligent oil and gas production facilities;

　　　　　　　　　　Digital and intelligent simulation of offshore operations;

　　　　　　　　　　Design of floating offshore wind farms and facilities.

Construction technologies

The Company has the technical capability to construct 30,000 T fixed platforms and large jackets. It has developed multiple world-leading special technologies including but not limited tofor the simulation of the construction,  and lifting of large deepwater jackets, the onshore lifting of large structures measured atweighted 1,000 tons, the integrated construction of offshore structures, weight transfer during high-position construction, accurate weighing, sliding and rolling loadout of structures. Its cCore technical capabilities include:

　　　　　　　　　　Construction of super-large fixed platforms;

　　　　　　　　　　Construction of deepwater floating structures;

　　　　　　　　　　Construction of LNG modules;

　　　　　　　　　　Intelligent manufacturing;

　　　　　　　　　　Accurate weighing and weight transfer of super-large modules;

　　　　　　　　　　SPMT transportation, loadout, and final assembly of offshore structures;

　　　　　　　　　　Design of tooling for the construction of offshore structures;

　　　　　　　　　　CTOD welding at -25℃;

　　　　　　　　　　TKY node automatic welding;

　　　　　　　　　　Development and extensive application of welding processes with domestically produced welding consumables.

　　　　　　　　　　Installation technologies

Installation technology

The Company has independently developed four major technical capacities and 19 core technologies, including the installation of 30,000 T jackets, the float-over installation of modules, the laying of 1,500 m deepwater pipelines, the installation of subsea structures such as PLETs, the laying of flexible pipelines and cables and the post-treatment of subsea pipelines. It, finds answer tosolved a number of technical problems in large number in the area of subsea structures installation of subsea structures, and increases improved theits competitiveness and influence in the field of deepwater projects. Its cCore technical capabilities include:

The Company is capable of has developed the technologies for installing 300 m deepwater jackets and has , overcome the technical challenges of in the loadout, transportation and slide launching of super-large jackets,, long pile installation, deepwater grouting, and launch barge upgrading and modification of launch barge., Aand efficiently completed a number of projects has been delivered with satisfaction, among whichsuch as Liwan 3-1 and Haiji-1 projects are served as examples.;

The Company has excellent performance in has developed the technologies the loadout of hydraulic sliding shoes, float-over installation/dismantling, and long-distance wet towing of large semi-submersible platforms, having s and successfully completed several offshore installation projects, such as the offshore installation of the “Shenhai-1” energy station.;

The Company is in leading position has developed the technologies for high-position float-over, low-position float-over, dynamically positioned float-over, and ultra-shallow water float-over operations in all kinds of sea areas under various weather conditions and has fully realized the localization of supporting equipment for float-over installation. These technologies have reached the international leading level.

“深海一号”能源站湿拖作业

Underwater technologies

The Company has the technical capabilities infor the design, manufacturing, installation and testing of various subsea production systems such as 1,500 m deepwater manifolds, subsea base plates, subsea connectors, subsea control systems, jumpers and subsea valves, the installation of pile foundations for the mooring systems of deepwater floating facilities and platforms and, laying of tension legs, position limit and tie-back. Moreover, in terms of independent R&D, It has independently developed the technologies offor deepwater testing module and coiled tubing systems and the ability offor the pre-commissioning of deepwater pipelines, risers, and deepwater, large-span, and complex subsea production systems are the competitive fronts of the company. Its cCore technical capabilities include:

　　　　　　　　　　Design, manufacturing, installation and testing of subsea production systems and facilities;

　　　　　　　　　　Vertical laying and tie-back of deepwater flexible dynamic/static pipelines and cables;

　　　　　　　　　　Installation of deepwater single-point (multi-point) mooring systems;

　　　　　　　　　　Equipment and technology for the pre-commissioning of deepwater pipelines and risers;

　　　　　　　　　　Technology for the pre-commissioning of deepwater umbilicals and flying leads;

　　　　　　　　　　Technology for pre-commissioning of subsea production systems operating in deep waters;

　　　　　　　　　　Technology for trenching for deepwater pipelines and cables;

　　　　　　　　　　Deepwater grouting and spanning/jumping.

Maintenance technologies

Equipped with a well-established diving management system, tThe Company, member of ADCI since 2007 has a proven diving management system and became a member of ADCI in 2007. Currently, it i, iss a standing member of the Emergency Rescue Professional Committee of China Diving & Salvage Contractors Association and receiveswith class I certificate of diving services and credit evaluation and underwater inspection certificates issued by the DNV.GL, ABS and CCS. The CompanyIt has strong developed the technical capability offor the abandonment of offshore oil and gas production facilities in  and entered the international markett of platform abandonment and. It has participated in a number of challenging projects involving repairment of submarine pipelines and cables with its acquired advancedthe technical capability in to perform emergency maintenance and repair of submarine pipelines and participated in a number of projects “challenging emergency” repair of submarine pipelines and cables. The Company has excellent performance in the technical capabilities for the upgrading, renovation, and life extension assessment of large platforms and infor the connection of shore power to platforms in service.

　　　　　　　　　　Dismantling, recovery and abandonment of above-water facilities;

　　　　　　　　　　Dismantling, recovery and abandonment of underwater facilities;

　　　　　　　　　　Cutting of 300 m deepwater structures;

　　　　　　　　　　Disconnection, towing and tie-back of FPSO vessels;

　　　　　　　　　　Hole-drilling, plugging and repair of submarine pipelines under pressure without the need of shutdown;

　　　　　　　　　　Emergency maintenance and repair of submarine pipelines;

　　　　　　　　　　Emergency maintenance and repair of submarine cables;

　　　　　　　　　　Provision of diving services in accordance with the applicable international standards;

　　　　　　　　　　Maintenance and repair of ships and underwater structures.

Advanced equipment manufacturing technologies

Through independent development and joint R&D, the Company has overcome technical bottlenecks in the area of developed a system of equipment and technologies including pile grippers and packers for risers, emergency recovery devices for deepwater pipelines, and grouting machine and s, achievedsuccessfully the localizationlocalized theof offshore operation equipment and devices. Moreover, it has, mastered the technologies foofr the development of compressors, skids, LPG and other equipment, and achieved the localization of efficient oil and gas processing equipment and units. Its cCore technical capabilities include:

　　　　　　　　　　Ultra-deep water pile hammer system;

　　　　　　　　　　Topside float-over leg mating units;

　　　　　　　　　　Grout packer;

　　　　　　　　　　Jacket skirt pile gripper;

　　　　　　　　　　Grouting machine;

　　　　　　　　　　Production and metering separators;

　　　　　　　　　　Slug catcher;

　　　　　　　　　　Dissolved and miniaturized gas float processing units;

　　　　　　　　　　Natural gas TEG dehydration system;

　　　　　　　　　　Light hydrocarbon recovery-LPG system;

　　　　　　　　　　Compressors.

桩腿耦合缓冲装置

LNG technologies

The Company has deliveredcompleted more than 30 LNG storage tanks and terminals as the main contractor, established an integrated system of engineering technologies for the EPCM of full containment LNG storage tanks with sizes ranging from 30,000 m3 to 270,000 m3, and independently developed multiple core technologies for LNG projects represented by the fully automated welding process for full containment LNG storage tanks, and taking en a leading position in the construction of LNG projects in China.

　　　　　　　　　　Automatic welding process for the welding of vertical seams of inner shells of LNG storage tanks;

　　　　　　　　　　Integrated design and construction of piles-columns of full containment LNG storage tanks.