Revenues from non-U.S. operations were 84%, 80% and 78% of our total consolidated revenues for the years ended December 31, 2024, 2023 and 2022, respectively. Our non-U.S. operations and shipyard rig construction and enhancement projects are subject to political, economic and other uncertainties, including:
- terrorist acts, war and civil disturbances,- expropriation, nationalization, deprivation or confiscation of our equipment or our customer's property,- repudiation or nationalization of contracts,- assaults on property or personnel,- piracy, kidnapping and extortion demands,- significant governmental influence over many aspects of local economies and customers,- unexpected changes in law and regulatory requirements, including changes in interpretation or enforcement of existing laws,- work stoppages, such as labor strikes,- complications associated with repairing and replacing equipment in remote locations,- limitations on insurance coverage, such as war risk coverage, in certain areas,- imposition of trade barriers,- wage and price controls,- import-export quotas,- exchange restrictions, currency fluctuations and changes in monetary policy,- uncertainty or instability resulting from hostilities or other crises in the Middle East, West Africa, Latin America, Southeastern Asia, Eastern Europe or other geographic areas in which we operate,- changes in the manner or rate of taxation,- limitations on our ability to recover amounts due,- increased risk of government and vendor/supplier corruption,- increased local content requirements,- the occurrence or threat of epidemic or pandemic diseases and any government response to such occurrence or threat,- changes in political conditions, and - other forms of government regulation and economic conditions that are beyond our control.
We historically have maintained insurance coverage and obtained contractual indemnities that protect us from some, but not all, of the risks associated with our non-U.S. operations such as nationalization, deprivation, expropriation, confiscation, political and war risks. However, there can be no assurance that any particular type of contractual or insurance protection will be available in the future or that we will be able to purchase our desired level of insurance coverage at commercially feasible rates. Moreover, we may initiate a self-insurance program through one or more captive insurance subsidiaries. In circumstances where we have insurance protection for some or all of the risks associated with non-U.S. operations, such insurance may be subject to cancellation on short notice, and it is unlikely that we would be able to remove our rig or rigs from the affected area within the notice period. Accordingly, a significant event for which we are uninsured, underinsured or self-insured, or for which we have not received an enforceable contractual indemnity from a customer, could materially adversely affect our financial position, operating results or cash flows.
We are subject to various tax laws and regulations in substantially all countries in which we operate or have a legal presence. Actions by tax authorities that impact our business structures and operating strategies, such as changes to tax treaties, laws and regulations, or the interpretation or repeal of any of the foregoing or changes in the administrative practices and precedents of tax authorities, adverse rulings in connection with audits or otherwise, or other challenges may have a material impact on our tax expense.
Our non-U.S. operations are also subject to various laws and regulations in the countries in which we operate, including laws and regulations relating to the operation of drilling rigs and the requirements for equipment. We may be required to make significant capital expenditures to operate in such countries, which may not be reimbursed by our customers. Furthermore, regulators in certain jurisdictions, such as Brazil where we have four drillships currently operating, have become more aggressive in their interpretations and enforcement of such laws and regulations. Any adverse rulings or changes in enforcement practices that materially impact our ability to operate in these jurisdictions could cause delays in contract commencement dates, unscheduled operational downtime, reduced or zero day rates or the termination or cancellation of contracts. Governments in some countries are active in regulating and controlling the ownership of oil, natural gas and mineral concessions and companies holding such concessions, the exploration of oil and natural gas and other aspects of the oil and natural gas industry in their countries. In some areas of the world, government activity has materially adversely affected the amount of exploration and development work performed by major international oil companies and may continue to do so. Moreover, certain countries accord preferential treatment to local contractors or joint ventures or impose specific quotas for local goods and services, which can increase our operational costs and place us at a competitive disadvantage. There can be no assurance that such laws and regulations or activities will not materially adversely affect our financial position, operating results or cash flows.
The shipment of goods, services and technology across international borders subjects us to extensive trade laws and regulations. Our import activities are governed by specific customs laws and regulations in each of the countries where we operate. Moreover, many countries, including the U.S., control the export and re-export of certain goods, services and technology and impose related export recordkeeping and reporting obligations. Governments also may impose express or de facto economic sanctions or tariffs against certain countries, persons and other entities that may restrict or prohibit transactions involving such countries, persons and entities.
The laws and regulations concerning import activity, export recordkeeping and reporting, export control, economic sanctions and tariffs are complex and frequently changing. These laws and regulations may be enacted, amended, enforced or interpreted in a manner materially impacting our operations. Shipments can be delayed and denied export or entry for a variety of reasons, some of which are outside our control and some of which may result from failure to comply with existing legal and regulatory regimes. Shipping delays or denials could cause unscheduled operational downtime, reduced day rates during such downtime and contract cancellations. Any failure to comply with applicable legal and regulatory trading obligations also could result in criminal and civil penalties and sanctions, such as fines, imprisonment, exclusion from government contracts, seizure of shipments and loss of import and export privileges.
Our partners, agents and our and their respective affiliated entities or respective officers, directors, employees and agents may take actions in violation of our policies and procedures designed to promote compliance with the laws of the jurisdictions in which we operate. Any such violation could materially adversely affect our financial position, operating results or cash flows.