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Industry Glossary Term

Well Spacing

The regulated distance between wellbores on a pad or lease area. Tighter spacing means more wells drilled closer together, increasing crew density and equipment demand. Subcontractors should anticipate compressed timelines and overlapping scopes when spacing is tight.

Related Terms

Gyroscopic Guidance

Industry

A downhole navigation system that uses gyroscopes to track drill bit position and direction without magnetic interference. Subcontractors use it in areas where magnetic tools fail, such as near casing or in high-latitude regions. Accurate wellbore placement reduces costly corrections and keeps projects on schedule.

Core Desorption

Industry

A lab process where gas is measured as it releases from rock core samples pulled during drilling. Subcontractors handling or transporting cores must follow strict protocols to preserve sample integrity. Mishandling can compromise data and trigger costly disputes with operators.

Failure Assessment Diagram (fad)

Industry

A FAD is an engineering tool used to assess whether a crack or defect in a component is safe to operate or requires immediate repair. Subcontractors use FAD assessments to support fitness-for-service decisions on pressurised piping, vessels, and structural welds. Results directly influence repair scopes, shutdown planning, and liability on field service contracts.

Geothermal Leasing

Industry

A government-issued agreement granting rights to develop heat energy from underground resources on a specific land parcel. For subcontractors, these leases define where drilling, piping, and surface work can legally occur. Active leases signal steady long-term project work, particularly in western Canada.

Phase Gate

Industry

A formal approval checkpoint where a project must meet defined criteria before work advances to the next stage. Subcontractors often cannot mobilise, invoice, or begin new scope until the client clears each gate. Delays at phase gates directly impact crew scheduling and cash flow.

Crawler Crane

Industry

A large lifting crane mounted on tracked undercarriage, used for heavy lifts on unstable or soft ground at oil and gas and construction sites. Subcontractors often source these through specialised rigging firms on a day-rate or project basis. Confirm ground-bearing capacity and operator certifications before mobilising.

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