Alteration

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 legal and financial obligation to properly plug and decommission a well at end of life. For subcontractors, unpaid invoices near abandonment projects carry higher collection risk. Operators may deprioritise vendor payments as they wind down a well's operations.

A charge issued by an operator or general contractor to a subcontractor for costs incurred due to defective work, delays, or failure to meet contractual obligations.

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.

A pricing model where contractors are paid a fixed daily rate for equipment and/or personnel, regardless of the amount of work completed that day.

Revenue that is earned but never collected due to operational inefficiencies. Common causes include lost field tickets, unbilled equipment hours, forgotten third-party charges, and documentation errors. Industry estimates suggest 1-5% of revenue is lost to leakage in paper-based operations.

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