A well design plan specifying the size, depth, and sequence of steel pipe (casing) run into a wellbore. For subcontractors, it dictates crew scheduling, equipment requirements, and service timing. Understanding it helps you anticipate your scope and mobilisation windows.
Casing Program
Related Terms
AFE (Authorization for Expenditure)
IndustryA budgeting document used in oil and gas projects that outlines expected costs and seeks approval before work begins. Subcontractors often work under AFEs issued by operators.
SPMT (Self-propelled Modular Transporter)
IndustryA multi-axle hydraulic platform vehicle used to move oversized modules, vessels, or heavy equipment on job sites. Subcontractors working heavy lifts or module installation scopes often coordinate directly with SPMT crews. Understanding load-out and transport sequencing is critical for scheduling your own work around these moves.
Long Lead Materials
IndustryEquipment or materials with extended procurement timelines, often weeks or months. Subcontractors must account for these delays when scheduling mobilisation and submitting project timelines. Late delivery can stall field work and trigger costly standby charges.
Self-Supply
IndustryWhen a subcontractor provides their own tools, equipment, or materials rather than relying on the prime contractor or client. This shifts procurement responsibility — and often cost risk — directly to your company. Pricing your bids correctly to recover these costs is critical.
Single-Source Contractor
IndustryA company hired to deliver an entire scope of work, rather than splitting it among multiple subcontractors. For field service subs, this means one firm holds the prime contract and manages all trades underneath. Winning a single-source role improves cash flow and reduces competition, but increases liability exposure.
Capital Maintenance Agreement
IndustryA long-term contract where a subcontractor provides scheduled upkeep and repairs on a client's major assets or facilities. Work scopes, pricing, and mobilisation terms are typically locked in advance. These agreements offer subcontractors predictable revenue but may limit flexibility to take on other work.
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