SECOND SUPPLEMENTAL INDENTURESupplemental Indenture • January 24th, 2007 • Allis Chalmers Energy Inc. • Oil & gas field services, nec • New York
Second Supplemental Indenture (this “Supplemental Indenture”), dated as of January 23, 2007, among Petro-Rentals, Incorporated, a Louisiana corporation (the “Guaranteeing Subsidiary”), a subsidiary of Allis-Chalmers Energy Inc. (or its permitted successor), a Delaware corporation (the “Company”), the Company, the other Guarantors (as defined in the Indenture referred to herein) and Wells Fargo Bank, N.A., a nationally chartered banking association (or its permitted successor), as trustee under the Indenture referred to below (the “Trustee”).
