Exhibit 3.17

MC-228661

Certificate of Incorporation

I, MELANIE E. RIVERS-WOODS Assistant Registrar of Companies of the Cayman Islands DO HEREBY CERTIFY, pursuant to the Companies Law CAP. 22, that all requirements of the said Law in respect of registration were complied with by

P2021 Rig Co.

an Exempted Company incorporated in the Cayman Islands with Limited Liability with effect from the 22nd day of July Two Thousand Nine

Given under my hand and Seal at George Town in the Island of Grand Cayman this 22nd day of July Two Thousand Nine

CERTIFIED TO BE A TRUE AND CORRECT COPY
		(SGD. MELANIE E. RIVERS-WOODS)
Sig.	/s/ Melanie E. Rivers-Woods
	Melanie E. Rivers-Woods		[seal of registrar]
	Assistant Registrar
		Assistant Registrar of Companies,
Date	22 July 2009	Cayman Islands