Shear All Ram features curved asymmetrical blades

Posted on 10 May 2011

The Shear All Ram has been shown to operate successfully when multiple shearing and sealing sequences are required, according to T3 Energy Services. The product was unveiled during OTC in Houston last week.

The Shear All Ram has been shown to operate successfully when multiple shearing and sealing sequences are required, according to T3 Energy Services. The product was unveiled during OTC in Houston last week.

The Shear All Ram (SAR) was introduced last week at OTC, a BOP ram design whose field tests show it has the ability to shear “any size pipe and casing with 30% to 50% less shearing force (than conventional rams)” and “to manipulate the pipe or the casing, centering the pipe or casing for a clear decisive shear,” Saeid Rahimian, president of the fluid management group for Robbins Myers, said at the product launch during the Offshore Technology Conference in Houston last week.

SAR is expected to be offered by Robbins Myers’ T3 Energy Services unit in Q3 this year.

“This is probably the only shearing device that wholly sweeps the bore of the blowout preventer to assure that it gathers up the pipe, moves the pipe to a shearable position, and then of course continues on and shears the pipe,” T3 VP engineering Gary Schaeper said, adding that SAR development is an ongoing process. “We’ve yet to find the limit. We haven’t broken the rams yet. … We have a lot more development work to do to find the limit to this product.”

According to Doug Jahnke, engineering manager for T3’s pressure control group, the asymmetry of the design is the product’s most unique feature, allowing for more blade features in a smaller envelope. “Incorporating a near-vertical rake promotes tensile failure at the creasing points. The blade arcs extend forward to provide containment, supported transversely against the side of the ram bore, so there’s no fear of breaking the sides off,” Mr Jahnke said. Due to the ram’s architecture, it also allows the sheared pipe to be lifted out of the BOP so it doesn’t interfere with the further closure of the rams, he said.

Leave a Reply

*

FEATURED MICROSITES


Recent Drilling News

  • 26 November 2014

    US EIA: Increase in energy demand requires 33 million bbl/day more oil

    The world is going to need one-third more oil between 2010 and 2040, with developing countries, such as China and India, accounting for a major portion in the increase in...

  • 25 November 2014

    Prescriptive Analytics prescribes how to complete wells to maximize production

    "Big data" is taking on a new role in industry, where companies are combining the findings from geology and geophysics with new data collected from advanced technologies...

  • 25 November 2014

    Petrobras completes drilling first appraisal well in Libra Consortium

    Petrobras recently completed drilling the first appraisal well in the Libra area, the 3-BRSA-1255 (3-RJS-731), known as NW1. Located in the Northwest portion of the Libra block, in the pre-salt layer of the...

  • 24 November 2014

    Ensign secures contracts for 2 ADR 1500S pad drill rigs in Montney area

    Ensign Energy Services has signed contracts for two of its new ADR 1500S pad drill rigs for a major operator in the Montney area of northeast British Columbia...

  • 21 November 2014

    Statoil cancels Stena Carron rig contract offshore Angola

    Statoil has decided to cancel the Stena Carron rig contract after fulfilling the work commitments in the Statoil-operated blocks 38 and 39 in the Kwanza basin offshore Angola...

  • Read more news