On-location support work performed at an active drill site, including safety watch, equipment operation, and logistics. Subcontractors are typically mobilised on short notice and paid on a day-rate basis. Scope can shift quickly, so clear change-order processes are essential.
Wellsite Services
Related Terms
Combined-Cycle Gas Plant
IndustryA power generation facility that uses both gas turbines and steam turbines to maximise efficiency. For subcontractors, these sites involve complex, multi-discipline scopes across mechanical, electrical, and instrumentation trades. Outage and commissioning work is highly scheduled, requiring precise crew coordination and fast mobilisation.
Processing Train
IndustryA series of vessels and equipment that separates wellhead fluids into oil, gas, and water. Subcontractors are often scoped to one train at a time, so know which train your work order covers. Shutdowns or upsets on your train can directly affect your crew's schedule and completion milestones.
Lng (liquefied Natural Gas) Train
IndustryA single end-to-end processing unit that cools natural gas into liquid form for storage and export. Large LNG facilities run multiple trains, each requiring dedicated construction, maintenance, and shutdown crews. Subcontractors are typically mobilised per train, making scope and schedule highly compartmentalised.
P3 (public-Private Partnership)
IndustryA project delivery model where government and private companies jointly fund and develop infrastructure like pipelines, roads, or facilities. Subcontractors often work under large prime contractors who hold long-term P3 concession agreements. Payment structures and scope changes can be complex, so review contract terms carefully before mobilising.
Heads of Agreement (hoa)
IndustryA preliminary document outlining the key commercial terms agreed between parties before a formal contract is finalised. For subcontractors, it signals serious intent but is not always legally binding. Avoid mobilising crews or purchasing materials based solely on an HoA.
Epc (engineering, Procurement, and Construction) Contractor
IndustryA company hired to deliver a project from design through build, acting as the main contractor above subcontractors. As a subcontractor, your client and contract holder is typically the EPC, not the asset owner. They control scope, scheduling, and invoice approval on site.
Latest Industry News
Superior Energy to Acquire Sonic, Expanding Wellsite Production Equipment Line
Superior Energy Services is acquiring Permian Basin-focused Sonic Holdings to expand its production equipment and wellsite services portfolio, World Oil reports.
2 months agoIndustryBaker Hughes Lands Compression, Liquefaction Orders for Venture Global's Gulf Coast Buildout
Baker Hughes secured orders to supply gas compression for the Cloud Connector Pipeline and modular liquefaction equipment for Plaquemines LNG, expanding Venture Global's Louisiana infrastructure footprint.
11 hours agoIndustryInside Ole Miss's $1.3B Build-Out: A Master Class in Managing 170 Projects at Once
The University of Mississippi has 170 construction projects running simultaneously across its Oxford campus, a live test case in staging and sequencing that facility-construction firms bidding higher-ed work should study closely.
11 hours agoIndustry$408M Roosevelt Bridge Replacement Breaks Ground at Lake Texoma
ODOT and design-build team Zachry Construction/Traylor Bros. broke ground on the $408 million US-70 Roosevelt Bridge replacement over Lake Texoma, with completion targeted for fall 2029.
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Industry GuideHow Rig Count Trends Affect Subcontractor Demand and What to Do About It
Rig counts are the earliest signal of where field service work is heading. Learn how to read drilling activity trends, anticipate demand shifts, and position your crew before the phone stops ringing.
Industry GuideWhat Is an AFE in Oil and Gas and How Does It Affect Subcontractor Payments?
An AFE (Authorization for Expenditure) controls every dollar spent on an oilfield project. Learn how it affects your billing, change orders, and cash flow as a subcontractor.
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