Blowout

Recent Blowout on the semiDeepwater Horizon in the Gulf of Mexico (20-4-2010)

Enroute to the Gulf of Mexico

prepared by: Wiggert Landzaat (Oilfield Consultants)

Spudding it’s first well

prepared by: Wiggert Landzaat (Oilfield Consultants)

prepared by: Wiggert Landzaat (Oilfield Consultants)

Location

The rig is (was) operating in the Gulf of Mexico ~50 mile offshore Louisiana

prepared by: Wiggert Landzaat (Oilfield Consultants)

NEW ORLEANS, La. -- The Coast Guard continues the search for 11 missing crewmembers from the mobile offshore drilling unit (MODU) Deepwater Horizon. Watchstanders at the U.S. Coast Guard District Eight command center here received a report at approximately 10 p.m. Tuesday (21st April 2010) of an explosion and fire aboard the Deepwater Horizon, approximately 42 miles Southeast of Venice, La. Updated reports indicate that there were 126 people on board the MODU at the time of the explosion. One-hundred-fifteen crewmembers have been accounted for. Of those accounted for:Seventeen crewmembers were medevaced from the sceneNinety-four crewmembers are being transferred to shore at Port Fourchon aboard the Damien Baxton, an offshore supply vessel. There are no major injuries reported for these members.Four crewmembers have been transferred to another vesselCoast Guard is actively searching for all unaccounted for personnel and have the following units responding:Air Station New Orleans:* Two HH-65C Dolphin rescue helicopters and crewsAviation Training Center, Mobile, Ala.:* One HH-60 rescue helicopter and crew* One HC-144 Ocean Sentry rescue plane and crewIn addition, the Coast Guard cutters Pompano, Zephyr, Razorbill and Cobia are on scene.

prepared by: Wiggert Landzaat (Oilfield Consultants)

The rig during the blowout

prepared by: Wiggert Landzaat (Oilfield Consultants)

prepared by: Wiggert Landzaat (Oilfield Consultants)

 22 April 2010 02:48 GMT Work is continuing to stem the flow of hydrocarbons that appear to be fuelling the fire, Transocean said. The company confirmed that 11 of the rig's 126-strong crew remain missing, while 115 others have been evacuated. Meanwhile, the Coast Guard said 94 rig workers rescued from the burning semisub have reached land at Port Fourchon, Louisiana. Earlier, the US Coast Guard said it has “no idea” where the 11 missing men could be, with Rear Admiral Mary Landry saying earlier reports that the men were seen in a lifeboat were false. The search for the men continues. Nine of the missing crew work for Transocean, with the other two employed by an unnamed contractor. The explosion occurred on Tuesday evening at about 2200 hours local time while the rig was drilling a well on the Maconda prospect in BP-operated Mississippi Canyon Block 252, about 41 miles (65 kilometres) south-east of Venice, Louisiana. The cause of the explosion is not yet known, although it is understood surface casing work was being carried out at the time of the blast. Transocean said that the rig's stability is being closely monitored. Earlier, the rig was listing at an angle of between three and 10 degrees. The Coast Guard has also put in place contingency plans should there be any threat to the environment. An investigation into the cause of the accident has been launched and an assessment of the damage will be carried out once it is safe to do so, Transocean said. The US Coast Guard will also launch a probe. At the time of the explosion, the well had reached a total depth of more than 18,000 feet, Transocean executive Adrian Rose told a press conference in Houston last night

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He said production casing was being run and cemented, after which it would be tested for integrity and a cement plug set to abandon the well for completion later as a subsea producer. “We don’t know what caused the accident,” he told the press conference, but when asked if it was a blowout, he replied: "Basically, yes." Rose added that "undoubtedly abnormal pressure" had accumulated inside the marine riser and as it came up it "expanded rapidly and ignited". He told reporters that the intervention plan involves sending a remotely operated vehicle down with a “hot stab” that could then close the blowout preventer and stem the flow. Rose said they do not know whether the rig will be salvageable.

Of the 17 injured, many have been treated and released from area hospitals, Rose said. A spokeswoman at West Jefferson Medical Centre confirmed four crew members had been admitted to the hospital. Two arrived by ambulance and two by helicopter. She told UpstreamOnline all four were treated and released shortly before noon yesterday. Deepwater Horizon was built in 2001 by Hyundai Heavy Industries at the shipyard in Ulsan, South Korea. It is a Reading & Bates Falcon RBS-8D design rig with accommodations for up to 130 people.

The dynamically-positioned Deepwater Horizon can operate in waters up to 10,000 feet and can drill to 30,000 feet. The current dayrate on the rig is believed to be around $500,000. Deepwater Horizon cost an estimated $350 million when delivered but replacement costs for a similar unit today could approach double that amount. Published: 22 April 2010 02:48 GMT  | Last updated: 22 April 2010 08:17 GMT

prepared by: Wiggert Landzaat (Oilfield Consultants)

Deepwater Horizon Specification when it was built.• Deepwater Horizon The DEEPWATER HORIZON is a Reading & Bates Falcon RBS8D design semi-submersible drilling unit capable of

operating in harsh environments and water depths up to 8,000 ft (upgradeable to 10,000 ft) using 18¾in 15,000 psi BOP and 21in OD marine riser. Rig Type 5th Generation Deepwater Design Reading & Bates Falcon RBS-8D Builder Hyundai Heavy Industries Shipyard, Ulsan, South Korea Year Built 2001 Classification ABS Flag Marshall Islands Accommodation 130 berths Helideck Rated for S61-N helicopter Moonpool 21 ft x 93 ft Station Keeping Dynamically Positioned Max Drill Depth 30,000 ft / 9,144 m Max Water Depth 8,000 ft / 2,438 m Operating Conditions Significant Wave: 29 ft;@ 10.1 sec; Wind: 60 knots; Current: 3.5 knots Storm Conditions Significant Wave: 41 ft @ 15 sec; Wind: 103 knots; Current: 3.5 knots Technical Dimensions

• Length 396 ft 121 m Breadth 256 ft 78 m Depth 136 ft 41 m Operating Draft 76 ft 23 m Ocean Transit Draft 29 ft 9 m VDL - Operating 8,816 st 8,000 mt Capacities

• Liquid Mud 4,435 bbls 24,900 cu ft 705 cu m Drill Water 13,076 bbls 73,415 cu ft 2,078 cu m Potable Water 7,456 bbls 41,862 cu ft 1,185 cu m Fuel Oil 27,855 bbls 156,392 cu ft 4,426 cu m Bulk Mud 13,625 cu ft 386 cu m Bulk Cement 8,175 cu ft 231 cu m Sack Material 10,000 sacks Drilling Equipment

• Derrick Dreco 242 ft x 48 ft x 48 ft, 2000 kips GNC Drawworks Hitec active heave compensating drawworks, 6900 hp rated input power continuous, 2in drilling line Motion Compensator Hitec ASA Active Heave Compensator, 13.7 ft stroke, 500 st operating, 1000 st locked Top Drive Varco TDS-8S, 750 st, 1150 hp with PH-100 pipe handler Rotary Varco RST, 60.5in opening, 1000 st Pipe Handling 2 x Varco PRS-6i Pipe Packers; Varco AR-3200 Iron Roughneck Mud Pumps 4 x Continental Emsco FC-2200, 7500 psi Shale Shakers 7 x Brandt LCM-2D CS linear motion / cascading shakers Desander 2 x Brandt SRS-3 with 6 x 12in cones Desilter Brandt LCM-2D/LMC with 40 x 4in cones over one linear motion shaker, 2400 gpm Mud Cleaner See Desilter BOP 2 x Cameron Type TL 18¾in 15K double preventers; 1 x Cameron Type TL 18¾in 15K single preventer; 1 x Cameron DWHC 18¾in 15K wellhead connector LMRP 2 x Cameron DL 18¾in 10K annular; 1 x Cameron HC 18¾in 10K connector Diverter Hydril 60 with 21¼in max bore size, 500 psi WP and 18in flowline and two outlets Control System Cameron Multiplex Control System Riser Vetco HMF-Classs H 21in OD riser; 90 ft long joints with C&K and booster and hydraulic supply lines RiserTensioners 6 x Hydralift Inline, 50f t stroke, 800 kips each GuidelineTensioners N/A PodlineTensioners N/A Choke & Kill Stewart & Stevenson 3-1/16in, 15K, with 2 x adjustable chokes and 2 x hydraulic power chokes Cementing Halliburton (third party equipment) Machinery

• Main Power 6 x Wartsila 18V32 rated 9775 hp each, driving 6 x ABB AMG 0900xU10 7000 kW 11,000 volts AC generators Emergency Power 1 x Caterpillar 3408 DITA driving 1 x Caterpillar SR4 370 kW 480 volts AC generator Power Distribution 8 x ABB Sami-Megastar Thruster Drives, 5.5 MW and 6 x GE Drilling Drive Lineups 600 V 12 MW Deck Cranes 2 x Liebherr, 150 ft boom, 80 mt @ 35 ft Thrusters 8 x Kamewa rated 7375 hp each, fixed propeller, full 360 deg azimuth Propulsion See Thrusters Mooring Equipment

• Winches N/A Wire/Chain N/A Anchors N/A Copyright © 2010 Transocean Ltd.

prepared by: Wiggert Landzaat (Oilfield Consultants)

The Horizon is sinking (from Rigzone)

• The US Coast Guard office in Louisiana has confirmed that Transocean's semisubmersible, Deepwater Horizon, has sunk in approximately 5,000 feet of water off the coast of Louisiana at approximately 10:30 a.m, (CST) this morning. Additional explosions occurred this morning causing the rig to settle below the surface. At this time it is unclear what the condition of the rig is. ROVs have been deployed to survey the situation. The exact position of the rig is not known at this time and two pipelines that are in the area have been shut-in as a precaution should the rig impact one or both of the pipelines. Either the GSF Development Driller III or the Discoverer Enterprise, both currently under contract to BP, could be used to drill a relief well should it be necessary.

• The well was being temporarily abandoned as a producer and would have been tied back to existing infrastructure in the area. It had been drilled to just over 18,000 feet and had already been

cased and cemented. An ROV is also being used to determine the condition of the well head. BP's Incident Management Team is continuing to make every effort to respond to the spill in coordination with Transocean, the USCG, and MMS.

• BP says five deepwater open ocean recovery vessels are currently on location with more on the way and skimming operations have begun. Current skimming capacity in the area is 170,000 bbls/day. The barge storage capacity in the area is just over 120,0000 bbls/day with more storage capacity also on the way. Shallow water skimmers are also on standby at Fourchon, Louisiana. Within 6 hours there will be 500,000 feet of boom in the area and it will increase to 1,000,000 feet within the next 12 hours. Four aircraft are also on standby to spray dispersants.

prepared by: Wiggert Landzaat (Oilfield Consultants)

prepared by: Wiggert Landzaat (Oilfield Consultants)