A well-site service that monitors drilling fluid returns to detect hydrocarbons and analyse formation data in real time. Subcontractors provide specialised technicians and instrumentation units for this work. It is commonly scoped as a standalone package within a drilling contract.
Mud Logging
Related Terms
STACK (Sooner Trend Anadarko Basin Canadian and Kingfisher)
IndustryA prolific multi-zone oil and gas play in central Oklahoma covering Canadian and Kingfisher counties. Subcontractors active here support high-density horizontal drilling and completions work. Mobilisation demand can spike quickly, so maintaining local crew and equipment availability is critical.
Mmbtu (million British Thermal Units)
IndustryA standard unit for measuring natural gas energy content, commonly used in supply contracts and fuel billing. Subcontractors working on gas facilities or equipment commissioning will encounter MMBtu-based pricing. It directly affects how fuel costs and energy consumption are calculated on invoices.
Limited Notice To Proceed
IndustryAn LNTP (Limited Notice to Proceed) authorises subcontractors to begin a defined scope of work before the full contract is executed. It typically covers early mobilisation, procurement, or site prep activities up to a specified dollar limit. Work performed beyond that limit is at the subcontractor's own risk until full NTP is issued.
Tunnel Portal
IndustryThe open entrance and exit points of a tunnel where underground meets surface operations. For subcontractors, portals are critical mobilisation zones for equipment, crews, and material staging. Access, congestion, and safety controls at portals directly affect your crew's productivity and schedule.
Tidal-Water Export Terminal
IndustryA coastal or estuary facility where bulk commodities like LNG or crude oil are loaded onto marine vessels for export. Water depth fluctuates with tides, affecting vessel scheduling and your crew's access windows. Subcontractors must plan shifts and equipment mobilisation around tide tables and vessel berthing schedules.
Pipeline Open Season
IndustryA formal period when a pipeline operator solicits capacity commitments from shippers before building or expanding a line. For subcontractors, it signals upcoming construction and maintenance work. Winning bids during this phase often trigger mobilisation timelines and crew planning.
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