Iadc Ddr (international Association of Drilling Contractors Daily Drilling Report)

A formal written amendment to an existing contract that modifies scope, cost, or schedule. Subcontractors should never perform out-of-scope work without a signed change order. Undocumented changes are a leading cause of unpaid invoices and disputes.

The point when a client formally accepts and begins using delivered equipment or a completed scope of work. For subcontractors, this date often triggers final billing milestones or warranty periods. Confirm it in writing to protect your payment rights.

A conflict between JV (Joint Venture) partners over cost-sharing, scope, or payments that can delay approvals and freeze subcontractor invoices. When JV partners disagree, field service companies often face work stoppages or withheld purchase orders. Always clarify which JV partner holds contracting authority before mobilising.

The point when project financing is fully secured and contractual obligations become binding. For subcontractors, it typically signals that mobilisation, procurement, and invoicing can officially begin. Work started before financial close carries significant payment risk.

Pricing arrangements where labour or service rates are automatically adjusted based on preset variables like fuel costs or inflation indices. Common in long-term oil and gas contracts, they reduce rate renegotiation between operators and subcontractors.

A funding structure where a specific project secures its own debt and equity, separate from the sponsor's balance sheet. For subcontractors, payment depends heavily on the project's cash flow rather than the owner's overall finances. This increases payment risk, making it critical to review contract terms and security provisions carefully.

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