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Offshore Oil & Ocean Engineering


August 2014 Issue

Claxton Completes BGA Removal to Enable Well Completion
Claxton Engineering Services Ltd. (Great Yarmouth, England) has completed the first rigless removal of a stuck bottom hole assembly (BHA). The work was completed during a slot recovery operation using an innovative approach at Maersk’s (Copenhagen, Denmark) Tyra East field in the Danish sector of the North Sea.

The well was drilled in the 1980s and, during construction, the BHA had become stuck in the conductor pipe and prevented well completion. Claxton used its slot recovery methodology and tooling, specialist cutting equipment and a dive support vessel to solve the issue.

BSEE Starts Ongoing Tests for Stationary Skimmers
The U.S. Bureau of Safety and Environmental Enforcement (BSEE) has initiated a series of ongoing tests at Ohmsett, BSEE’s National Oil Spill Response Research and Renewable Energy Test Facility, to measure the effectiveness of stationary skimmer systems. The skimmers, which are devices that collect and remove oil from the surface of the water, will be tested using multiple oil types to determine their oil recovery rate and oil recovery efficiency. BSEE will use the results of these tests as a comparison to the skimmers’ published nameplate capacity values, the number currently being used to characterize skimmer performance. The nameplate capacity is used in oil spill response plans to determine whether or not sufficient mechanical recovery equipment is available to respond to a worst-case discharge scenario.

ABS, DSME to Develop LNG-Fueled Drillship
ABS (Houston, Texas), a provider of classification services to the global offshore industry, has entered into a joint development project (JDP) with Daewoo Shipbuilding & Marine Engineering (Seoul, South Korea), DSME, to develop the industry’s first LNG-fueled drillship.

The JDP will address challenges associated with storing and managing cryogenic LNG safely by combining DSME’s experience developing and applying LNG technology to floating structures with ABS’s technical standards and experience working on a number of gas-fueled, LNG and regasification unit projects.

To initiate the project, DSME has performed a concept design, comparison between two types of LNG storage tanks and analysis of the fuel gas supply system that will be installed on the drillship. ABS will conduct concept design review, basic engineering review, and a risk assessment of the tank space and access area, fuel gas supply system, machinery space, and access area and associated configurations.

Statoil Opens Research Center to Increase Recovery From NCS
Statoil (Stavanger, Norway) has opened a new research center for improved oil recovery (IOR) in Trondheim, Norway. The IOR center is to develop technologies that will lead to further increase of the recovery rate from the reservoirs. The goal is 60 percent recovery rate on the Norwegian Continental Shelf (NCS).

“Research and technology development have been key elements in achieving the record-high recovery rate we already see on the NCS,” said Norwegian Petroleum and Energy Minister Tord Lien. “If the recovery rate increases by 1 percent, it will increase our income from the NCS by NOK 300 billion.”

Statoil expects an oil recovery rate above 50 percent on the NCS. A recovery rate of 50 percent represents an increase of 7.5 billion barrels.

The IOR center has a new industrial scanner with 500-times-higher resolution than a medical scanner. It will allow for the following of oil movements and flows in various rocks on pore level. The images will make it possible to see which IOR method is best suited in each reservoir, while getting a deeper understanding of how the reservoir is formed with regard to clay, pore size and cracks.

OEG Acquires OSCA, Expands Presence in Caspian
OEG Offshore (Aberdeen, Scotland) has acquired OSCA Environmental Services Ltd. (Inverurie, Scotland), significantly expanding its international reach in the Caspian region.

OEG has acquired OSCA’s entire 2,500-unit stock and bases in Baku, Azerbaijan; Aktau, Kazakhstan; and Turkmenistan. It has also acquired stocking locations in Sakhalin, Russia; Gabon; Congo; and Angola.

This is OEG’s second major global growth move in less than two months, following the establishment of a joint venture with Unique Maritime Group (Sharjah, United Arab Emirates) to provide offshore equipment for rental and sale in the Middle East.

Following the acquisition, OSCA, which will retain its brand as part of OEG Group, will be led by long-standing commercial manager Donald Guthrie, who will become regional director.

Bob Smith, owner of OSCA, will remain chairman of the OSCA group.

$24 Billion Offshore Helicopter Spend Predicted for 2014 to 2018
Douglas-Westwood forecasts $24 billion in expenditure on offshore helicopter services between 2014 and 2018, a 57 percent increase in comparison to the preceding five-year period.

Western Europe will continue to account for the largest share of global expenditure, driven by both the extensive North Sea infrastructure and the preference towards using large helicopters.

Cortez Subsea Gets UK Patent for Modular Pipelay System
Cortez Subsea (Aberdeen, Scotland) has been granted a U.K. patent for its Modular Pipelay System, making new shallow-water pipelay technology available to the North Sea.

The technology resulted from a collaboration between Cortez Subsea and NOV (Houston, Texas), with NOV’s Tuboscope Zap-Lok. The first trials will start at the beginning of 2015.

The Modular Pipelay System allows the use of the Zap-Lok connected pipeline to be installed from a suitable offshore multipurpose DP vessel. The Modular Pipelay System is designed to facilitate the storage, handling, connection and deployment of the pipeline in an S-lay configuration onto the seabed at a speed of three to five minutes per joint, which is a daily installation rate of up to 5 kilometers.


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