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IndustryGlossary Term

Upstream

The segment of the oil and gas industry involved in exploration and production (E&P). Includes drilling, completions, and well operations.

Related Terms

Backreaming

Industry

Backreaming is the process of enlarging a pilot borehole by pulling the reamer back through while rotating. Subcontractors are often mobilised specifically for this phase on HDD (Horizontal Directional Drilling) projects. Billing is typically tied to footage reamed or hourly rig time.

Master Service Agreement (MSA)

Industry

A contract between an operator and a service company that establishes the general terms and conditions for all future work. Individual jobs are then executed under work orders or AFEs referencing the MSA.

Land Block

Industry

A designated area of Crown or freehold land divided for exploration and production rights. Subcontractors often mobilise crews and equipment according to which land blocks an operator holds active licences for. Work scopes, access agreements, and surface rights are typically tied to specific block boundaries.

Preferred Vendor Program

Industry

A formal arrangement where a general contractor or operator pre-qualifies subcontractors for priority work access. Approved vendors are typically offered first right of refusal on new projects. Getting listed can mean steadier work volume but often requires meeting strict safety, insurance, and pricing criteria.

Refractory Lining

Industry

Heat-resistant material installed inside furnaces, boilers, and process vessels to protect steel from extreme temperatures. Subcontractors are often hired for installation, inspection, and repair during turnarounds. Proper curing and dryout procedures are critical to avoid costly failures.

Mmcf/d (million Cubic Feet Per Day)

Industry

A measurement of natural gas production or flow volume, used to describe the output capacity of a well, pipeline, or facility. Subcontractors use this figure to gauge job scale, equipment sizing, and crew requirements. Higher MMcf/d ratings typically signal larger scopes of work and longer contract durations.

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