Top Tensioned Risers

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Tenaris offers plain-end, high-strength pipes in line pipe and OCTG chemistries.

 

Risers for challenging dimensional requirements

Dry tree solutions are constantly being evaluated and installed in oil and gas deep-water and ultra-deep water markets all over the world.

Because of  their reduced movement, Spars and TLPs require Top Tensioned Riser systems which connect the sub-sea well bore to the floating production vessel, enabling the installation of Christmas trees on the dry floating deck.

Top Tensioned Riser pipes are normally in contact with high-pressure production fluids and are subjected to dynamic loads. Tenaris offers the following solutions covering the most common dimensional range for these complex environments:

  • Plain-End High-Strength Pipes – LP Chemistry (of up to X100 Non Sour and up to X70 sour service)
  • Plain-End High-Strength Pipes – OCTG Chemistry (up to 140 Ksi)

The risers are installed directly from the drilling derrick on the platform by making up a series of riser joints equipped with threaded connections.

Tenaris has launched the TenarisHydril Blue® Riser, a connection that has been specially designed for use in deepwater top tensioned riser and high pressure drilling riser applications where an exceptional level of fatigue resistance and sealability performance is required.

In challenging environments, such as deep water and corrosive settings, Hi/Lo values during welding must be guaranteed to meet stringent fatigue requirements.

To facilitate the welding process, we provide stringent ID end tolerances through specific processes, such as:

A well-established product in the offshore market

Our Top Tensioned Risers have been used in some of the most complex deep-water projects worldwide:

Gulf of Mexico

  • Magnolia
  • Devil’s Tower

Far East

  • Kikeh

West Africa

  • Kizomba A&B
  • Oveng & Okume