CATEGORIZED | 2012, News

Weatherford sets new DWC world record

Posted on 19 April 2012

Asia Pacific is the stage for a new offshore world record of 1,710 meters for the longest interval so far drilled with casing (DWC). The record was set by Weatherford International in an operator’s exploration well using the Nan-Hai-VI semisubmersible operated by Maersk Drilling. The 12 ¼-in. section was drilled with 9 5/8-in. casing.

In addition, a dual-gradient riserless mud recovery system provided by AGR was combined with this operation – another world-first. The DWC system was made up to the rig’s top drive, and casing was picked up and drilled in using a special casing drill shoe. The process reduced the rig crew’s health and safety exposure via scope elimination and reduced manual handling. There were no HSE incidents during the record-setting drill.

According to Weatherford, the riserless mud recovery system, combined with the DWC technique to manage the notoriously unstable “Bare Sands” at the gas field location on Australia’s North West Shelf (block WA-5-l), enabled risk mitigation and environmental benefits.

“The performance confirmed the benefits of DWC technology. The interval at well was drilled with minimal vibration and exceptional on-bottom rate-of-penetration,” Weatherford application engineer – Australasia Budi Utama said.

“This success was the culmination of early well definition provided by the subsurface team, timely project approvals gained by the NWS (North West Shelf) business unit, and identification of exploration well as a candidate for this strategic technology implementation,” Mr Utama said.

Weatherford reports that application of the “new technology procedure” by the drilling engineering and operations team enabled “flawless execution.”

An estimated $800,000 was cut from the previous best Nan-Hai VI conventional performance, and 46 hours of rig time were saved.

Leave a Reply

*

FEATURED MICROSITES


Recent Drilling News

  • 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...

  • 19 November 2014

    Stepwise approach guides Statoil’s North American onshore path

    When Statoil entered the North American onshore industry in 2008, it was a non-operator in a joint venture (JV) with Chesapeake in one shale play. Since then, Norwegian-based…

  • Read more news