6-K

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

______________________

FORM 6-K

REPORT OF A FOREIGN ISSUER

PURSUANT TO RULE 13A-16 OR 15D-16

OF THE SECURITIES EXCHANGE ACT OF 1934

For July 5, 2011

______________________

Archer Limited

Par-la-Ville Place, 14 Par-la-Ville Road

Hamilton HM 08

Bermuda

 (Address of principal executive offices)

______________________

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F x         Form 40-F o

Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

Yeso           No x

If ‘‘Yes’’ is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b):

Exhibits

99.1     “New ISIN for Archer Limited from June 1, 2011,” press release dated June 1, 2011.

99.2     “ARCHER – Share capital increase – exercise of options,” press release dated June 9, 2011.

99.3     “Archer Limited Announces Notice of Partial Redemption of Allis-Chalmers Energy Inc. 9.0% Senior Notes, due 2014,” press release dated June 20, 2011.

“Safe Harbor” Statement under the US Private Securities Litigation Reform Act of 1995: the matters discussed in this document may contain forward-looking statements. These statements are based on various assumptions, many of which are based, in turn, upon further assumptions, including Archer management’s examination of historical operating trends. Included among other factors that in Archer’s view could cause actual results to differ materially from the forward-looking statements contained in this document are the following: the competitive nature of the offshore drilling industry, oil and gas prices, technological developments, government regulations, changes in economical conditions or political events, inability of Archer to obtain financing for new investments on favorable terms, changes of the spending plan of Archer’s customers, changes in Archer’s operating expenses including crew wages, insurance, repairs and maintenance, failure of yards to comply with delivery schedules on a timely basis and other risks indicated in the risk factors included in Archer’s registration statement on Form F-4, filed with the US Securities and Exchange Commission on January 24, 2011, and other filings with the US Securities and Exchange Commission.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	ARCHER LIMITED (Registrant)
	By:  Archer Management (US) LLC
Date: July 5, 2011
	/s/ Max Bouthillette
	Name: Max Bouthillette
	Title: Executive Vice President and General Counsel

EX-99.1

Exhibit 99.1

New ISIN for Archer Limited from June 1, 2011

Hamilton, Bermuda (June 1, 2011)

In connection with the recent name change of the Company, Archer Limited has been assigned a new International Securities Identification Number (“ISIN”).

The new ISIN for Archer Limited is BMG0451H1097.

Archer Limited will be traded with the new ISIN from Monday June 6, 2011.

This information is subject of the disclosure requirements acc. to §5-12 vphl (Norwegian Securities Trading Act).

EX-99.2

Exhibit 99.2

ARCHER - Share capital increase - exercise of options

Hamilton, Bermuda (June 9, 2011)

In connection with Archer’s option program, 66,499 options have been exercised at an average strike price of NOK 17.71 per share. After this transaction, the total number of options outstanding in Archer Limited is 12,397,239.

In connection with the exercised options, Archer has issued 66,499 common shares. The authorized share capital of Archer Limited is USD 1,200,000,000 divided into 600,000,000 common shares of par value USD 2.00 each. Fully paid and outstanding share capital of Archer Limited following the share capital increase is USD 646,888,004 divided into 323,444,002 fully paid common shares of par value of USD 2.00 each.

This information is subject of the disclosure requirements acc. to §5-12 vphl (Norwegian Securities Trading Act).

EX-99.3

Exhibit 99.3

Archer Limited Announces Notice of Partial Redemption of Allis-Chalmers Energy Inc. 9.0% Senior Notes, due 2014

Hamilton, Bermuda (June 20, 2011)

Archer Limited announces that its wholly-owned subsidiary, Allis-Chalmers Energy Inc., has notified holders of its 9.0% Senior Notes, due 2014, (the “Notes”), that $125 million in aggregate principal amount of the $222.6 million outstanding Notes will be redeemed on July 18, 2011.

 Pursuant to the terms of the Indenture, (i) the Notes will be redeemed at a redemption price of 102.250% of the outstanding aggregate principal amount of the Notes, plus accrued and unpaid interest and Liquidated Damages (as defined in the Indenture), if any, on the Notes to, but not including, the redemption date, July 18, 2011, and (ii) the Trustee, Wells Fargo Bank, N.A., shall select the Notes to be redeemed on a pro rata basis, by lot or in accordance with any other method the Trustee shall deem fair and appropriate, although no Notes in amounts of $2,000 or less shall be redeemed in part. Notes and portions of Notes selected will be in amounts of $2,000 and integral multiples of $1,000 in excess thereof.

Wells Fargo Bank, N.A. will serve as Paying Agent.  Payment of the Redemption Price will be made only upon presentation and surrender of the Notes to the Paying Agent. Direct inquiries to the Trustee by telephone to at 1-800-344-5128 or by Fax at 612-667-6282.

This press release is for informational purposes only and is not an offer to purchase, or the solicitation of an offer to purchase, the Notes.

This information is subject of the disclosure requirements acc. to §5-12 vphl (Norwegian Securities Trading Act).