Walther Precision and their US distribution partner, Maxbar Inc., have introduced their 87-G50 large bore ROV connector for subsea use. Though this is a new connection for Walther; the latching and drive mechanisms have been in subsea use since 1996. This new connector first debuted to offshore customers this year at the 2018 Subsea Tieback in Galveston, Texas.
Designed for gas lift, scale squeeze, MEG and other applications, the locking design coupling has been used worldwide at pressures up to 15,000 psi and to 5,000-m depth. Typical installation has the fixed subsea connector half mounted to the structure and the ROV operated half equipped with the drive mechanism, locking and sealing technology. The locking mechanism is operated by an API class 4 torque tool. The connection principle is a safe and simple two-step process. First, the ROV flies the free half to the fixed bulkhead connector which allows initial alignment. Then, while the ROV applies clockwise torque, the free half connector latches to the fixed portion of the connector, allowing for final alignment, then terminating the connection.
The coupling design on the 87-G50 is said to have the ability to make and break the connection multiple times without changing the metal-to-metal seal.
This coupling design is said to have many advantages, but the companies say that one advantage stands out above the rest: the ability to make and break the connection multiple times without changing the metal-to-metal seal. In addition, redundant sealing, protection against the environment, a 30-year design life, and various customizable options make the unique connection desired by operators worldwide.•
