Demanding environment led to well integrity issues
A Congo operator faced many challenges, including multiple wellhead
suppliers and inexperienced and untrained local personnel. The high pressures,
high temperatures, and hydrogen sulfide (H2S) found in many of the
wells had also taken its toll on equipment. With many installations in the
region more than 40 years old, the operator decided to conduct a survey of its
entire wellhead portfolio. Results showed that more than 65% of wells had
integrity issues and production was not being optimized.
Refurbishment and maintenance program optimized equipment
The operator contracted Cameron to inventory, maintain, and install
wellheads and gate valves, as well as supply new wellheads, gate valves, and
Christmas trees. Since the partnership began, wellhead and gate valve
maintenance and performance on 360 wells (up to 12,000 ft deep), distributed
among 10–12 offshore platforms, has undergone rigorous examination.
Reshaping the maintenance strategy involved individual plans for drilling and production. In the production segment, a Cameron coordinator and three permanent teams of service technicians oversee equipment maintenance and production gate valve spares inventory. A preventive maintenance campaign and a corrective maintenance response are managed by a dedicated coordinator, who has access to the operatorâs planning, maintenance and SAP systems. A record is provided confirming that a gate valve is sealing and that internal parts have been replaced.