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Industry Glossary Term

TD (Total Depth)

The maximum depth reached by a drilling rig during well construction, measured from the surface to the bottom of the wellbore. For subcontractors, TD determines project scope, equipment requirements, and billing milestones as it marks the completion of the drilling phase.

Related Terms

Midstream Infrastructure

Industry

The pipelines, compressor stations, and processing facilities that move and condition product between the wellhead and end markets. For subcontractors, it represents a major source of maintenance, construction, and inspection work. Contracts here often involve long project timelines and strict regulatory oversight.

Production Shut-in

Industry

A temporary halt to oil or gas production at a well or facility, ordered by the operator. For subcontractors, this often means suspended work orders and delayed revenue until operations resume. Standby rates and demobilisation terms in your contract become critical during a shut-in.

Corrective Maintenance

Industry

Repair work performed after equipment has already failed or broken down. For subcontractors, it often means urgent mobilisation and unplanned labour costs. Scope can expand quickly, so clear change-order procedures are essential.

Henry Hub

Industry

A natural gas pricing benchmark set at a Louisiana pipeline hub, widely used in North American supply contracts. When Henry Hub prices rise, upstream activity increases and subcontractor demand typically follows. Monitoring this index helps field service companies anticipate project volumes and negotiate rates.

Blm (bureau of Land Management) Lease Sale

Industry

A U.S. federal auction where energy companies bid on rights to drill on public land. Successful bids trigger exploration and development activity, creating demand for field service subcontractors. Monitor scheduled sales to anticipate upcoming work opportunities in affected regions.

Design-Build

Industry

A project delivery method where one contractor handles both engineering design and construction under a single contract. As a subcontractor, you may be brought in mid-scope with limited drawing sets, requiring flexibility. Scope creep risk is higher since designs are still evolving while field work begins.

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