简介：斯伦贝谢公司推出的新产品，subC-strip和subC-collar，用于海洋井下检测管线的变形和压力变化。subC-strip为条形设备，固定于管壁外，通过接箍上传感器将数据传送到上面数据采集系统中；subC-collar是一个夹子，测定温度等。

Chevron determined the only practical way to record buckling on their Tahiti development was to adopt the subC-strip and subC-collar integrity monitoring systems. These 600ft sensors continuously monitor the entire buckle shape, pipe axial and hoop strain and temperature, providing a complete picture of buckle response to operational production cycles.

The subC-strip uses a sensor strip attached to flowline joints in the buckle region which follows the shape of the pipe as it bends. The strip contains a series of embedded optical strain sensors which measure the curvature profile along the buckle. The Tahiti subC-strip is designed to fasten on top of the insulated flowline.

The subC-collar is a clamp design that fastens around pipe; the embedded optical sensors are oriented in the axial and hoop directions to measure axial-strain and internal pressure fluctuations in the flowline. The subC-collar is attached to the flowline and over-moulded using standard field joint coating procedures.

Data is transferred to the surface via a field umbilical using a low power optical modem communication system to the topside data acquisition system. It is captured on the Tahiti Spar where real-time measured and derived values are presented in tabular and graphical form.

In addition to the first deployment above, both elements of the measurement system can be retrofit by ROV to existing subsea structures.