Exhibit 99.2

24 September 2013

To the Noble Team:

I want to share with you some very important news about Noble. As you may already be aware, today we announced that Noble has decided to pursue a plan to separate our business into two separate and highly focused offshore drilling companies. Noble intends to create a new company to own and operate most of our standard specification drilling rigs. This entity will also provide drilling services for the Hibernia Platform. Meanwhile, Noble will continue to own and operate our higher specification assets. A list of the drilling units expected to be included in each Company is attached.

Following comprehensive deliberations and a good deal of work, we have concluded that separating into two business units makes operational, financial and strategic sense. We believe that separating our current fleet along these lines will enable each company to have a more focused business strategy, enhance growth potential and overall valuation of assets, be more responsive to the needs of customers and better attract and retain employees.

We expect the standard specification business to be separated from Noble through the distribution of the shares of the new company to Noble shareholders in a spin-off that would be tax-free to shareholders. Subject to business, market, regulatory and other considerations, the separation may be preceded by an initial public offering of up to 20 percent of the shares of the new company. We currently expect the date that the standard specification company will begin to operate as a separate company could occur as early as the second quarter of 2014.

I know this news may be unexpected, and I certainly appreciate that it may cause uncertainty about what this means for some of you personally. We will work to address these uncertainties as quickly as possible, but understandably, it will take some time. However, I believe that this transaction is best for all of our stakeholders and will provide employees with opportunities that come with being part of a more highly focused organization. For now, you should know that there will be no immediate changes in our day-to-day operations and we should all continue to do our jobs in our usual professional manner. Ultimately, we expect there to be job creation for some shore-based positions around the world to support offshore operations that are contemplated to be largely unchanged.

Until the process is completed, the most important thing all of us can do is to continue to focus on our current job priorities. Going forward, we will provide additional updates on how the separation will affect you. Again, this is a very exciting time for our Company and I thank you for your continued support and for your contributions to our success.

Keep up the good work,

David W. Williams

This letter does not constitute an offer to sell, or the solicitation of an offer to buy, any securities.

Participants in the Solicitation

Noble Corporation and its directors and officers may be deemed to be participants in the solicitation of proxies from the Company’s shareholders in connection with the proposed separation of the standard specification business. Information about the directors and executive officers of Noble and their ownership of Noble shares is set forth in the definitive proxy statement for Noble’s 2013 annual general meeting, which was filed with the SEC on March 11, 2013, and in any documents subsequently filed by its directors and executive officers under the Securities and Exchange Act of 1934, as amended.

Investors can obtain more information when the proxy statement relating to shareholder approval of the separation becomes available. This proxy statement, and any other documents filed by Noble with the SEC, may be obtained free of charge at the SEC web site at www.sec.gov or on the Company’s website at www.noblecorp.com. Investors should read the proxy statement carefully, when it becomes available, before making any voting decision because it will contain important information.

Units to be Owned and Managed by the Standard Specification Company

Jackups (34)

Units to be Owned and Managed by the Standard Specification Company

(Continued)

Floaters (8)

Other Assets (4)

Units to be Owned and Managed by Noble

Jackups (15)

Floaters (20)