BP working on multiple options to stop gulf oil spill

Paula Dittrick
OGJ Senior Staff Writer

HOUSTON, May 10 -- BP PLC executives plan to attempt to contain the oil spill in the Gulf of Mexico using a small containment structure, which they are calling a top hat. Meanwhile, they also plan to stop the flow of oil from the deepwater well off Louisiana by plugging up the blowout preventer in 5,000 ft of water and then sealing the wellhead.

BP Group Chief Executive Tony Hayward met with reporters May 10 at BP’s offices in Houston where he said hundreds of technical experts and operating specialists from various companies and countries are working on multiple options in parallel.

“We continue to fight this very aggressively,” Hayward said. “We are learning all the time. A lot of real-time learning is going on…. The learning from this will be very extensive.”

Earlier on May 10, BP announced it has spent $350 million on spill response efforts at the ocean’s surface, subsea containment efforts, relief well drilling, and payments to Louisiana, Alabama, Mississippi, and Florida.

BP and partners hired Transocean Ltd.’s semisubmersible rig, Deepwater Horizon, to drill the Macondo well on Mississippi Canyon Block 252. The Deepwater Horizon exploded Apr. 20, leaving 11 crew members missing and presumed dead. On Apr. 22, the Deepwater Horizon sank.

The oil and gas well is spilling an estimated 5,000 b/d. BP is the operator with 65% interest. Partners are Anadarko Petroleum Corp., 25%, and Mitsui Oil Exploration Co. Ltd., 10%.

Top hat technique
On May 9, BP set aside a large containment dome that it had hoped to place over a damaged, leaking riser on the seabed because gas hydrates built up in the dome. Engineers had hoped the 98-ton dome could capture an estimated 85% of the leaking oil and gas, which then was to be pumped to a drillship on the surface.

“We learned primarily that there is a lot more gas involved in this leak than we had believed,” Hayward said.

BP plans in 72 hr to deploy a small containment structure called a top hat, Hayward said. The idea behind the smaller top hat is to prevent the leaking oil and gas from contacting the sea water, which is 30° F. at 5,000 ft.

Hayward said engineers believe the amount of sea water in the large dome contributed to the formation of more gas hydrates than engineers had expected even though they had anticipated that gas hydrates could be a problem.

Methanol to prevent the formation of gas hydrates also will be used in conjunction with the top hat, which is about 4 ft by 5 ft, Hayward said. BP has necessary approvals from federal officials to use the methanol.

Previously, BP planned to place the containment dome over the damaged riser and then to connect a riser from the containment dome to the drillship. In the top hat method, BP plans to connect the riser to the top hat before the top hat is put in place on the seabed.

“It will be a little trickier for us, but we will make it work,” Kent Wells, BP senior vice-president of exploration and production, said of the top hat method vs. the larger dome. “There are always some pros and cons to everything we try.”

He said some pipes will be placed into the seafloor to help secure the top hat.

Top kill technique
In what is known as a “top kill” or a “junk shot,” BP plans to first plug up the BOP by shooting various items including cut-up tires, ropes with knots, and golf balls into the internal workings of the BOP to seal it.

A pipe from the surface will be hooked to the BOP so that junk can be shot inside it. “We can give this several shots,” if needed, Wells said. “The No. 1 priority is to shut off the flow of oil.”

Immediately upon plugging the inside of the BOP, then BP plans to use existing choke and kill lines running along the BOP to send heavy fluid or mud at high pressure into the wellhead to push the oil and gas back into the reservoir. Eventually, cement will be sent into the well to seal and permanently abandon the well.

In describing the technique to reporters, Wells noted many unknowns exist. “We’ve never had a blowout before at 5,000 ft.”

Previously, BP used remotely operated vehicles to retrieve the control pod from the BOP. The control pod’s electronics are being refurbished to send electric signals to the choke and kill lines on the BOP stack. Wells said he hopes the junk shot can be done in 2 weeks.

“Whatever we try, we want to make sure it’s not going to make things worse,” Wells said. “We really believe it’s going to plug up the BOP. There are a lot of different steps to do. We will put whatever pressure it takes into the well,” to stop the flow of oil and gas.

Meanwhile, one relief well is being drilled, and a second relief well will be drilled as a backup to the first relief well in case the first relief well were to run into problems.

Drilling of the first relief well started May 2 and is expected to take up to 90 days. It had reached 9,000 ft of its total 18,000 ft as of May 10, Hayward said. Drilling of the second relief well was scheduled to start on May 14.

In other spill response efforts, BP is applying chemical dispersants on the subsea oil leaks to help break up the oil so that it can degrade before reaching the surface. Meanwhile, controlled burns are being done on open water to eliminate some of the oil slick before it reaches shore.

Skimming vessels and booms also are being used to prevent much of the oil from reaching shore. Airplanes also are spraying chemical dispersants on oil after it reaches the water’s surface. Oil has been reported reaching the shore in Louisiana and Alabama.

Joint USCG-MMS investigation hearing
The US Coast Guard and Minerals Management Service scheduled a 2-day public hearing starting May 11 in Kenner, La. The hearing concerns a joint investigation by USCG and MMS to identify factors leading to the rig accident and subsequent oil spill.

USCG Commandant Adm. Thad W. Allen, MMS Director S. Elizabeth Birnbaum, Department of Homeland Security Secretary Janet Napolitano, and Department of the Interior Secretary Ken Salazar signed an order convening the joint investigation, which is classified as a Coast Guard Marine Board of Investigation.

USCG and MMS share jurisdiction for the investigation of casualties occurring on the Outer Continental Shelf. Upon completion of the joint investigation, the team will issue a single report simultaneously to both agencies.

Other congressional hearings and investigations into the cause of the accident and spill are going on this week in Washington, DC.

Contact Paula Dittrick at paulad@ogjonline.com.

Related Articles

Anadarko boosts Wattenberg production

10/16/2014 Anadarko Petroleum Corp. stepped up production in Wattenberg field in Colorado during the second quarter. The rise was attributed to the success of...

SM raises initial production rates in the Eagle Ford shale

10/16/2014 An improved completion design that utilizes longer laterals and increased sand loadings is raising initial production (IP) rates for SM Energy Corp...

Oil and gas midstream ripe for investment, Deloitte specialists say

05/14/2014 Surging US production has made oil and gas midstream operations attractive investment prospects, three Deloitte specialists said during the final d...

OTC: Shale, deepwater development present different challenges

05/06/2014 The oil and gas industry continues to unlock greater resources both onshore and offshore—in shale formations and in deepwater. Growing production f...

Anadarko settles legacy claims against Kerr-McGee for $5.15 billion

04/07/2014 Anadarko Petroleum Corp. and subsidiaries it acquired when it bought Kerr-McGee Corp. in 2006 agreed to pay $5.15 billion to settle fraudulent conv...

Brightoil Petroleum to buy Anadarko’s China subsidiary for $1.075 billion

02/18/2014

Brightoil Petroleum Holdings Ltd. of China plans to buy Anadarko Petroleum Corp.'s subsidiary in China for $1.075 billion.

Anadarko reports fourth-quarter loss, record yearend sales volumes

02/04/2014

Anadarko Petroleum Corp. reported a fourth-quarter net loss of $770 million, decreasing net income by $1.145 billion.

BLM Rock Springs office issues Monell-Arch field decision

01/06/2014 The US Bureau of Land Management found no significant potential impact from Anadarko Petroleum Corp.'s proposed development of the Monell and Arch ...

Anadarko to move Eagle Ford production on KMCC-Double Eagle

12/26/2013 Anadarko Petroleum Corp. has signed a long-term agreement with Kinder Morgan Crude & Condensate LLC and Double Eagle Pipeline LLC, a 50/50-join...

White Papers

AVEVA NET Accesses and Manages the Digital Asset

Global demand for new process plants, power plants and infrastructure is increasing steadily with the ...
Sponsored by

AVEVA’s Approach for the Digital Asset

To meet the requirements for leaner project execution and more efficient operations while transferring...
Sponsored by

Diversification - the technology aspects

In tough times, businesses seek to diversify into adjacent markets or to apply their skills and resour...
Sponsored by

Engineering & Design for Lean Construction

Modern marketing rhetoric claims that, in order to cut out expensive costs and reduce risks during the...
Sponsored by

Object Lessons - Why control of engineering design at the object level is essential for efficient project execution

Whatever the task, there is usually only one way to do it right and many more to do it wrong. In the c...
Sponsored by

Plant Design for Lean Construction - at your fingertips

One area which can provide improvements to the adoption of Lean principles is the application of mobil...
Sponsored by

How to Keep Your Mud System Vibrator Hose from Getting Hammered to Death

To prevent the vibrating hoses on your oilfield mud circulation systems from failing, you must examine...
Sponsored by

Duty of Care

Good corporate social responsibility means implementing effective workplace health and safety measures...
Sponsored by

Available Webcasts


On Demand

Optimizing your asset management practices to mitigate the effects of a down market

Thu, Dec 11, 2014

The oil and gas market is in constant flux, and as the price of BOE (Barrel of Oil Equivalent) goes down it is increasingly important to optimize your asset management strategy to stay afloat.  Attend this webinar to learn how developing a solid asset management plan can help your company mitigate costs in any market.

register:WEBCAST


Parylene Conformal Coatings for the Oil & Gas Industry

Thu, Nov 20, 2014

In this concise 30-minute webinar, participants have an opportunity to learn more about how Parylene coatings are applied, their features, and the value they add to devices and components.

register:WEBCAST


Utilizing Predictive Analytics to Optimize Productivity in Oil & Gas Operations

Tue, Nov 18, 2014

Join IBM on Tuesday, November 18 @ 1pm CST to explore how Predictive Analytics can help your organization maximize productivity, operational performance & associated processes to drive enterprise wide productivity and profitability.

register:WEBCAST


US HYDROCARBON EXPORTS Part 3 — LNG

Fri, Nov 14, 2014

US LNG Exports, the third in a trilogy of webcasts focusing on the broad topic of US Hydrocarbon Exports.

A discussion of the problems and potential for the export of US-produced liquefied natural gas.

These and other topics will be discussed, with the latest thoughts on U.S. LNG export policy.

register:WEBCAST


Careers at TOTAL

Careers at TOTAL - Videos

More than 600 job openings are now online, watch videos and learn more!

 

Click Here to Watch

Other Oil & Gas Industry Jobs

Search More Job Listings >>
Stay Connected