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Uses HydroTech™ Collet Connectors for Future Tie-Ins
Mid-Line Tie-In Sleds are installed with the original pipeline and allow a future subsea tie-in to be made quickly and efficiently, without costly offshore spreads and without shutting off product flow. The sleds, which were developed by Oil States HydroTech™ and Mentor Subsea Technology Services, Inc., are an economical solution whenever the future tie-in location is known before the original pipeline is laid.
Mid-Line Tie-In Sleds are modular units that consist of flowline piping, a collet connector hub for the future tie-in, a block valve to isolate the future tie-in line, a Piggable Y fitting to combine the flowline and future tie-in line, and mud mats. Mid-Line Tie-In Sleds are welded into the pipeline like an ordinary joint of pipe and may be installed during conventional S-Lay or J-Lay operations. The sleds are equipped with mud mats for support on the seafloor. The mats remain folded in a vertical position until the sled clears the stinger.
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Mid-Line Tie-In Sled
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The tie-in, which can be performed from an ROV support vessel, is made using a jumper with a HydroTech™ collet connector at each end: one connects to a PLEM on the newly laid flowline, the other to the hub on the Mid-Line Tie-In Sled. Once the jumper is landed on the PLEM and the Tie-In Sled, an ROV is used to make up and test both collet connectors. After commissioning, the ROV opens the block valve, and the new flowline is ready for service.
The Mid-Line Tie-In Sled provides maximum flexibility and can be configured for vertical or horizontal jumper connections. The optional Rotating Porch (for horizontal jumpers) and Metal-Sealed Rotary Pipeline Swivels increase simplicity and reduce risk during installation. The Rotating Porch provides a landing platform that can be adjusted by an ROV to provide a level landing surface for the collet connector assembly during the tie-in process. Optional Rotary Pipeline Swivels eliminate residual torsion in the pipeline so that the sled can be landed on bottom with a near-vertical orientation.
Please provide the following information on any purchase order or request for quotation:
• Trunk line size, wall thickness & grade
• Branch tie-in, wall thickness & grade • Piggable "Y" configuration: symmetrical or asymmetrical |
To view the Mid-Line Tie-In Sled Brochure & Contacts, click on the corresponding link below:
Mid-Line Tie-In Sled Brochure
Mid-Line Tie-In Sled Contacts
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Oil States Industries, Inc.
Oil States International, Inc.