Exceeding Expectations

Safety

Operational Excellence

Customer Satisfaction

Exceeding Expectations

Vision:

As the offshore driller of choice, we will go beyond what is expected to achieve a safe zero-incident workplace and to be the clear choice among employees, customers and investors.

Core Values:

Ethical behaviorNo harm to people, property or to the environmentSuccess for employees, customers and shareholdersCan-do attitudeOperational excellence

Ensco is the Leader in Customer Satisfaction

Ensco exceeds customer expectations – every day – through a disciplined approach of investing in advanced drilling technologies and training employees on proven systems across a global fleet.

The result: superior safety performance and operational excellence that leads to the highest levels of customer satisfaction.

Ensco is ranked #1 in overall customer satisfaction among offshore drillers by EnergyPoint Research, the leading independent research firm that surveys customers in the global oilfield. In fact, Ensco earned the #1 ranking in 14 of 16 separate categories, including: total satisfaction; job quality; performance and reliability; and safety, health and environment. We are honored to have received this recognition, which is a testament to the hard work and dedication of our crews around the world.

• #1 in total customer satisfaction• World’s second largest offshore driller• Safety performance record that far exceeds industry averages• Newest fleet of ultra-deepwater drillships and semisubmersibles• Largest active premium jackup fleet worldwide• Experience working in virtually every major offshore basin• Customers include most of the leading international and national energy companies, plus many independent operators• Strong financial position with investment- grade credit ratings

Exceeding Expectations Through Disciplined Process Management

Invest in High-Quality Fleet

Talented Workforce Trained on Proven

Systems

Global Platform

Operational Excellence

Strong Safety Record

Leader in CustomerSatisfaction

A Wide Range of Advanced Drilling Technologies

Ensco’s rig fleet includes ultra-deepwater drillships and semisubmersibles with dynamic positioning, strategically located midwater assets and the largest fleet of active premium jackups in the world.

We have invested billions of dollars in our fleet over the past several years. Additional ultra-deepwater drillships and semisubmersibles are under construction to meet growing customer demand, and ultra-premium harsh environment jackup rigs are also being built that can drill some of the most complex high-pressure, high-temperature wells year round under harsh conditions.

Investing in Our Employees

Exceptional people – trained to excel – and equipped with proven safety management and operating systems – exceed customer expectations.

Ensco’s Competency Assurance Program (CAP) has been accred-ited by the International Association of Drilling Contractors (IADC). With one of the largest and most technologically advanced offshore drilling fleets in the world, Ensco is able to recruit and develop an experienced and highly-trained workforce with career opportunities in nearly every corner of the globe.

All employees are expected to live up to Ensco’s high ethical standards in their day-to-day activities.

Global Reach

Ensco’s operations span six continents. Having successfully drilled some of the most complex wells in virtually every major offshore basin around the globe, we have the expertise to address even the most complex needs of our customers.

Safety and Operational Excellence

At Ensco, safety and operational excellence are a way of life. As measured by customers, Ensco is the leader in:

• Safety, Health and Environment• Performance and Reliability • Job Quality

How do we do it?

• Make safety a core value and zero-incidents the primary mission • Steadily invest in one of the largest and most technologically-advanced offshore drilling fleets in the world • Train crews under industry-accredited competency programs• Use proven operating and safety management systems• Collaborate with customers and service providers to ensure the highest levels of safety and operational performance

Customer Satisfaction That Exceeds Expectations

A clear vision, strong core values and the highest ethical standards is where we start.

Disciplined investing, employee development and proven systems lead to superior safety performance and operational excellence. Customer satisfaction that exceeds expectations is the end result.

Ensco is ranked the #1 offshore driller in overall customer satisfaction.

Exceeding Expectations

London, England

Ensco plc6 Chesterfield GardensLondon W1J 5BQUnited KingdomPhone: 44(0) 207 659 4660

Registered in England No. 7023598

Dallas, Texas

500 North Akard StreetSuite 4300Dallas, TX 75201-3331Phone: 214 397 3000Toll Free: 800 423 8006

Houston, Texas

5847 San Felipe Suite 3300Houston, TX 77057Phone: 713 789 1400Fax: 713 789 1430

North and South America

5847 San Felipe Suite 3300Houston, TX 77057Phone: 713 789 1400Fax: 713 789 1430

15021 Katy FreewaySuite 300Houston, TX 77094Phone: 281 809 0400Fax: 281 809 0401 620 Moulin RoadBroussard, LA 70518-9978Phone: 337 837 8500Toll Free: 800 322 8217Fax: 337 837 8501

Avenida 4 Oriente, Lote 16,Entre Calle 1 Sur y 2 SurPuerto Industrial PesqueroLaguna AzulCiudad Del CarmenCampeche, 24129MexicoPhone: 52 938 138 0700Fax: 52 938 112 1435

Exceeding Expectations

Brazil

Marketing office:Av. Rio Branco, 181, 26 Andar Centro – Rio de Janeiro Brazil CEP 20-040-007 Phone: 55 21 2262 4074/4078Fax: 55 21 2262 3984

Operations office: Rua Internacional #1000Granja dos CavaleirosMacae-RJBrazil CEP 27937-300Phone: 55 22 2791 8100Fax: 55 22 2773 2643

Europe and Mediterranean

Ensco House Badentoy Avenue Badentoy Industrial Estate Portlethen, Aberdeen Scotland AB12 4YB Phone: 44(0) 1224 780 400 Fax: 44(0) 1224 780 444

Middle East and Africa

Al Moosa Tower 2Suite 2601Sheikh Zayed RoadP.O. Box 72453Dubai, UAEPhone: 971 4 403 7300Fax: 971 4 403 7305

Asia and Pacific Rim

300 Beach Road # 10-01/02The ConcourseSingapore 199555Phone: 65 6622 8900Fax: 65 6622 8909

We hope you keep our brochure for future reference. If you choose to discard it, please place it in a recycling bin. Thank you.

© 2011, Ensco plc