Specialised equipment run into a wellbore to perform drilling, measurement, or completion tasks. For subcontractors, these tools often require certified handling, transport, and make-up procedures. Improper use can trigger costly liability or contract disputes.
Downhole Tools
Related Terms
Field Gathering Lines
IndustryPipelines that collect oil, gas, or water from individual wellheads and route it to a central processing facility. Subcontractors frequently work on installation, inspection, and maintenance of these lines. Knowing the layout is essential for safe excavation and tie-in work.
SAGD (Steam Assisted Gravity Drainage)
IndustryA heavy oil extraction method using paired horizontal wells where steam is injected into the upper well to heat bitumen, allowing it to drain by gravity to the lower production well. Creates specialized maintenance and service opportunities for subcontractors in steam generation equipment, wellhead systems, and pipeline infrastructure at oil sands operations.
Pipeline Tie-in
IndustryA pipeline tie-in is the physical connection of a new pipeline section to an existing live system. For subcontractors, tie-in work often requires hot-tap certified crews and strict isolation procedures. Scheduling is critical, as tie-ins typically involve planned shutdowns with tight production windows.
BHA (Bottom Hole Assembly)
IndustryThe collection of drilling tools and equipment at the bottom of the drill string, including the drill bit, drill collars, stabilizers, and downhole motors. For drilling subcontractors, BHA configuration directly impacts drilling performance, tool wear rates, and operational efficiency.
Master Service Agreement (MSA)
IndustryA 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.
Grid Interconnection
IndustryThe process of connecting a power generation asset to the public electrical grid. For subcontractors, it triggers specific commissioning milestones, inspections, and sign-offs. Delays in interconnection approval can directly impact project timelines and invoicing.
Latest Industry News
Prime Horizontal Completes Management Buyout, Kench and Dekker Take the Helm
Prime Horizontal, a global HDD guidance and tooling provider founded in 1997, has completed a management buyout with Simon Kench becoming CEO and Nico Dekker taking the CFO role as managing partners.
11 hours ago IndustryUS Rig Count Edges Up to 547 as Drilling Activity Ticks Higher
The US oil rig count has risen modestly to 547, a small but notable demand signal for field service crews and subcontractors monitoring utilization trends.
11 hours ago IndustryBridger Pipeline Wins Presidential Permit for $2 Billion, 500,000 bbl/d Canada-US Crude Line
President Trump has granted Bridger Pipeline LLC a presidential permit to build a 647-mile crude oil pipeline from Canada through Montana to Wyoming, though federal and state approvals are still required before construction can begin.
yesterday IndustryCanada's First SMR Basemat Installed at Darlington in Historic Nuclear Construction Milestone
A 2.1-million-pound basemat module has been installed at Ontario's Darlington site, marking the first new nuclear reactor foundation poured in Ontario in over 30 years and signaling that SMR construction is firmly underway.
yesterdayRelated Guides
How Operator Mergers and Acquisitions Affect Your Subcontract Agreements
When operators merge, get acquired, or sell assets, subcontractor agreements are caught in the middle. Learn how M&A activity affects your MSA, payment terms, vendor status, and what to do before, during, and after a deal closes.
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.
Stay sharp on field operations
Industry news and insights, delivered to your inbox.
Subscribe to FieldNews