Heavy Haul for the Oil & Gas Industry: Moving Drilling Rigs, Vessels, and Refinery Equipment

Why Oil and Gas Operations Rely on Heavy Haul

The oil and gas industry has always been one of the largest users of oversize and overweight transport services in North America. The reasons are structural: the equipment required to drill, complete, produce, process, and refine hydrocarbons is massive by design. Drilling rigs that can reach down 15,000 feet or more require derricks, drawworks, and top drives built to handle millions of foot-pounds of torque. Pressure vessels that separate gas from liquid at the wellhead must contain pressures of thousands of pounds per square inch — which demands thick steel walls and heavy construction. Compressors that move natural gas through pipelines operate under continuous mechanical stress and must be engineered accordingly.

None of this equipment can be made lighter or smaller without compromising function. And because oil and gas infrastructure is built where the resource is — remote wellfields in West Texas, offshore support yards along the Gulf Coast, gas processing plants in the Rockies, refineries in the industrial corridors of Louisiana and New Jersey — the equipment must travel to where it is needed, often across hundreds of miles of public highway. That is the role of heavy haul transport, and it is one that R&RM LLC has filled for oilfield, midstream, and downstream customers since 2011.

Upstream: Drilling and Completion Equipment

Upstream oil and gas operations — exploration, drilling, and well completion — generate some of the most frequent and complex heavy haul moves in the industry. A single drilling rig relocation can involve 20 to 80 individual loads, with each component requiring its own oversize or overweight permit and trailer configuration.

Drilling Rig Moves

Land drilling rigs are designed to be moved. Between each well, the rig must be rigged down, transported, and rigged up at the next location. The frequency of these moves — sometimes every few weeks on a pad-drilling program — means that rig move efficiency directly affects well economics. The major rig components that require heavy haul transport include:

• Substructure: The rig's foundation frame, often the heaviest single piece in the move — 100,000 to 400,000 pounds depending on rig class. Requires multi-axle hydraulic platform trailers or heavy-duty multi-axle lowboy configurations for the largest substructures.
• Derrick sections: The steel lattice tower that supports the traveling block and drill string. Derricks are typically disassembled into sections of 40 to 80 feet in length, each section transported on an RGN or flatbed with overwidth and overlength permits.
• Drawworks: The hoisting mechanism that raises and lowers the drill string. A large drawworks assembly can weigh 60,000 to 150,000 pounds and requires a heavy-duty lowboy or RGN trailer with overweight permits.
• Top drive: The hydraulic motor assembly that rotates the drill string. Top drives are compact but extremely heavy relative to their footprint — 40,000 to 80,000 pounds — and require careful blocking and securing to protect the motor housing and gear assembly during transport.
• Mud system: The drilling fluid tanks, shakers, and centrifuges that condition and recirculate drilling mud. These are typically skid-mounted units weighing 20,000 to 80,000 pounds per skid, transported on flatbeds with overweight permits as needed.
• Power modules: Diesel generator sets that provide electrical power to the rig — typically 1,000 to 3,000 kW units, skid-mounted and transported on flatbeds or RGNs.
• Iron roughneck and pipe handling systems: Mechanized pipe handling equipment that can reach 30,000 to 60,000 pounds per assembly and requires careful transport planning to protect hydraulic actuators and alignment systems.

The coordination challenge in a rig move is not just the individual loads — it is the sequencing. Components must arrive at the new well location in the order they are needed for rig-up. The substructure must arrive and be set before the derrick can be erected; the drawworks must arrive before the drill line can be strung. A well-coordinated rig move schedules loads to arrive in rig-up sequence, with zero idle time at the location waiting for a critical component that is still two states away.

Well Completion Equipment

After a well is drilled, completion equipment arrives at the site for hydraulic fracturing, perforation, and well testing. Completion equipment moves are among the most time-sensitive in the oil and gas transport world — a hydraulic fracturing spread sitting on a pad waiting for a delayed piece of equipment costs the operator tens of thousands of dollars per hour in crew standby time.

• Hydraulic fracturing pump trucks: Large-displacement high-pressure pump units on carrier chassis, often 80,000 to 100,000 lbs gross — at or above federal weight limits, requiring overweight permits in many states
• Blender and hydration units: Fracturing fluid mixing equipment on skids or trailers, typically 30,000 to 60,000 lbs
• Sand storage and pneumatic delivery equipment: Proppant storage vessels (sand silos) that can reach 12 to 16 feet in diameter — requiring overwidth permits — and the pneumatic conveying blowers that deliver proppant to the wellhead
• Data vans and control units: Command and monitoring trailers that may appear standard but carry sensitive electronics that require secure, vibration-conscious transport
• Coiled tubing units: Large reel-mounted coiled tubing strings with their injector heads and power packs — a complete coiled tubing unit can weigh 80,000 to 120,000 lbs and require a dedicated RGN or lowboy

Midstream: Pipeline, Compression, and Processing Equipment

Midstream oil and gas operations — gathering, processing, and transportation of hydrocarbons between the wellhead and the refinery or end user — generate a different category of heavy haul moves. Rather than the frequent short-distance moves of drilling operations, midstream moves tend to be longer-distance, lower-frequency relocations of large fixed-plant equipment: compressors, heat exchangers, pressure vessels, and processing modules.

Natural Gas Compressors

Natural gas compression is the backbone of pipeline transmission and gathering system operations. Compressors that maintain pipeline pressure across hundreds of miles operate continuously under high mechanical stress and must be periodically overhauled, relocated as field production profiles change, or moved to new pipeline projects. Large reciprocating compressor packages — engine driver, compressor cylinder assembly, and skid frame — can weigh 150,000 to 400,000 pounds and measure 60 to 80 feet in length, placing them firmly in superload territory for most states.

• Caterpillar G3600 and G3516 gas compressor packages: Common on large gathering and transmission systems throughout the Permian, Eagle Ford, and Haynesville plays
• Ariel and Dresser-Rand reciprocating compressors: High-pressure gas compression units used in gas lift, injection, and pipeline transmission applications
• Solar Turbines Titan and Mars gas turbine compressor units: Turbine-driven centrifugal compressor packages with engine and compressor on a common base, often 200,000+ lbs and requiring hydraulic platform trailer transport
• GE Oil & Gas (Baker Hughes) centrifugal compressors: High-flow centrifugal units used in LNG facilities, gas processing plants, and offshore platform support

Compressor transport requires advance coordination with the state DOT permit offices in each state on the route — large compressor packages are superloads that require engineering review and route surveys before permits can be issued. See our superload permits guide for realistic timelines and the engineering documentation typically required.

Pressure Vessels and Separators

Pressure vessels — the tanks that separate gas, oil, and water at the wellhead and throughout the gathering system — are manufactured at fabrication shops and must be transported to the field site by truck. A large three-phase separator can be 10 to 12 feet in diameter and 40 to 60 feet long, requiring both overwidth and overlength permits. Horizontal vessels in the 8-foot diameter range can sometimes be transported on a standard flatbed with only minor overwidth permits; vessels in the 12-to-16-foot range require RGN transport, route surveys, and often police escorts.

Our pressure vessel transport service covers the full range of upstream and midstream vessel types, including vapor recovery towers, glycol contactors, amine treating units, and produced water handling equipment.

Heat Exchangers and Process Equipment

Gas processing plants use heat exchangers — shell-and-tube, air-cooled fin-fan, and plate-and-frame configurations — to heat and cool process streams throughout the plant. Large shell-and-tube heat exchangers used in gas processing can reach 15 feet in diameter and 70 feet in length, making them among the most challenging oversize loads in the oil and gas category. Air-cooled fin-fan coolers are wide but relatively light, presenting an overwidth permit challenge on rural routes where lane widths and shoulder conditions restrict overwidth travel.

See our industrial boilers and heat exchangers page for equipment-specific transport guidance.

Gas Processing Modules

Modular gas processing plants — skid-mounted or modular-fabricated processing units that are assembled at a fabrication yard and transported to the field as complete modules — are a growing segment of midstream infrastructure. A single cryogenic NGL extraction train may consist of eight to fifteen individual modules, each weighing 80,000 to 200,000 pounds and measuring 16 to 20 feet wide by 40 to 60 feet long. Transporting an entire modular plant requires careful sequencing: modules must arrive in the order needed for installation, and the transport plan must account for site access constraints at the remote field location.

Downstream: Refinery and Petrochemical Equipment

Downstream operations — oil refining, petrochemical manufacturing, and liquefied natural gas export — generate the largest individual heavy haul moves in the oil and gas industry. A process column for a refinery upgrade can weigh 500,000 to 2,000,000 pounds. A large reactor vessel for a hydrocracking unit can exceed 1,000,000 pounds — a move that requires months of planning, custom multi-axle hydraulic platform trailers, and coordination with multiple state DOTs, county highway departments, and utility companies to clear overhead obstructions along the route.

Refinery Turnaround Moves

Refineries undergo scheduled maintenance shutdowns — called turnarounds or turnarounds/outages — every two to five years. During a turnaround, process equipment is removed for inspection, repair, or replacement: heat exchangers pulled from their shells, reactor internals extracted for catalyst replacement, distillation column trays removed for cleaning. This generates a substantial volume of heavy haul moves in both directions — equipment going out to fabrication shops and equipment returning after repair — on a compressed schedule driven by the turnaround window.

Turnaround moves are time-critical. A refinery that is down for turnaround loses production revenue every day — typically millions of dollars per day for a large complex. Equipment that is delayed in transport extends the turnaround and compounds the financial impact. R&RM LLC understands turnaround scheduling and structures our transport commitments to support the turnaround schedule, not just the standard permit timeline.

Petrochemical and LNG Equipment

Petrochemical facilities — ethylene crackers, polyethylene and polypropylene plants, methanol plants — and liquefied natural gas facilities use some of the largest industrial equipment built. The cold boxes used in LNG liquefaction are architectural structures in their own right — 40 feet wide, 150 feet tall when erected, and delivered to the plant site in sections of 30 to 50 feet each. Reactor vessels for ethylene crackers can weigh 1,500,000 pounds or more, making them among the heaviest land-transported objects in the world.

These extreme moves are planned years in advance, involve route surveys that take months, require coordination with dozens of government agencies, and employ hydraulic modular transport systems (SPMT — self-propelled modular transporters) rather than conventional trailer configurations. For inquiries about extreme-weight oil and gas equipment moves, contact R&RM LLC early in your project planning — the earlier the coordination begins, the more options are available for route and trailer selection.

Geographic Concentration: Where Oil and Gas Heavy Haul Moves Happen

Heavy haul moves for the oil and gas industry are concentrated in the producing and processing regions that make up North America's energy infrastructure:

• Permian Basin (West Texas and southeastern New Mexico): The highest-volume drilling and completion activity in the United States. Rig moves, frac equipment, sand logistics, and gathering infrastructure moves are constant. State routes in Andrews, Reeves, Loving, and Midland counties see oversize loads daily.
• Eagle Ford Shale (South Texas): Active drilling and completion activity, with gathering system expansion driving pressure vessel and separator moves across a region with challenging rural road conditions.
• Haynesville Shale (North Louisiana and East Texas): One of the primary natural gas producing basins in the US, with active drilling and significant pipeline infrastructure investment.
• Appalachian Basin (Pennsylvania, West Virginia, Ohio): The Marcellus and Utica shale plays generate substantial rig and equipment move volume across a region with steep terrain, limited road capacity, and stringent permit requirements.
• DJ Basin (Colorado and Wyoming): Active Weld County drilling and Niobrara completion activity, with gathering and processing infrastructure development ongoing.
• Bakken Formation (North Dakota and Montana): Remote drilling locations with severe winter weather and limited road networks create some of the most challenging heavy haul logistics in the country.
• Gulf Coast refining corridor (Texas, Louisiana): The highest concentration of refinery and petrochemical plant infrastructure in North America, generating continuous turnaround and capital project transport volume.

R&RM LLC serves all of these regions as part of our coverage of all 48 continental states. See our state-specific pages for Texas heavy haul, Louisiana heavy haul, and North Dakota heavy haul for permit agency contacts, state-specific route restrictions, and local transport considerations in each producing basin.

Permit Requirements for Oil and Gas Equipment Moves

Oil and gas equipment generates a disproportionate share of the heavy haul industry's most complex permit cases. Several equipment categories in this sector regularly qualify as superloads — loads exceeding 200,000 pounds gross weight, 14 feet in width, or 16 feet in height — which require engineering review and special handling from state DOT permit offices.

Standard Oversize Permits

The majority of oil and gas equipment moves — rig components within normal class, separators up to 12 feet wide, compressor skids under 150,000 pounds — can be handled with standard oversize and overweight permits obtained through each state's permit office. Processing timelines for standard permits range from same-day self-issue in states with online portals to 3 to 5 business days in states with manual review processes.

Superload Permits for Large Equipment

Large compressor packages, major process vessels, and refinery equipment frequently qualify as superloads. The superload permit process involves engineering review of the proposed route — including bridge load ratings, pavement strength, and overhead clearance — before the permit can be issued. See our superload permits guide for a full explanation of the process, documentation requirements, and realistic timelines. The general guidance for superloads: initiate the permit process a minimum of three to four weeks before the desired move date for moves within a single state; allow six to ten weeks for multi-state superload moves involving bridge engineering review in multiple states.

Special Hauling Vehicles (SHV) and Hydraulic Platform Trailers

The heaviest oil and gas loads — large compressor packages, refinery vessels, and LNG equipment — require hydraulic modular platform trailers (also called Scheuerle or Goldhofer trailers, or SPMTs) rather than conventional lowboy configurations. These trailers use hydraulic suspension systems that allow the trailer deck height to be adjusted precisely, can be configured in virtually any axle count or width combination, and can carry loads of 1,000,000 pounds or more when configured with sufficient axle count. States regulate hydraulic platform trailer operations differently from conventional lowboy operations, and some states require separate SHV permits or SHV operator certifications in addition to oversize and overweight permits.

Planning a Heavy Haul Move for Oil and Gas Equipment

The information that allows R&RM LLC to plan an oil and gas equipment move accurately and efficiently includes:

• Equipment description: Make, model, type, and function of the equipment being moved
• Dimensions: Length, width, and height in transport configuration — whether assembled or disassembled, on its carrier chassis or lifted onto a trailer
• Weight: Gross weight of the equipment as transported, and ideally the weight distribution (where the heavy points are on the load)
• Pickup and delivery locations: Specific addresses, including any site access constraints — gate widths, low overhead obstructions, unpaved access roads, or weight-restricted bridge crossings on the approach
• Desired move date and any hard delivery deadlines: Turnaround schedules, rig-up sequences, and project completion dates that set the outer limit on transport timing
• Any known route constraints: Locations you know are problematic — bridges on the only access road, a low railroad underpass on the preferred route, or a county road that the county has not maintained for overweight loads

With that information, R&RM LLC can assess the route, identify permit requirements, flag potential timing issues, and provide an accurate quote and realistic move timeline. Call us at (404) 987-6225 or submit a quote request to begin planning your oil and gas equipment move.

Related Heavy Haul Resources

• Oilfield & Pipeline Equipment Transport — detailed guidance on specific oilfield equipment categories
• Pressure Vessel Transport — separators, reactors, storage vessels, and process equipment
• Industrial Boilers & Heat Exchangers — shell-and-tube, air-cooled, and fired heater transport
• Superload Permits Guide — when loads exceed standard oversize thresholds and require engineering review
• Multi-State Oversize Permit Coordination — how long-haul heavy loads get permitted across state lines
• How to Get Oversize Permits — a complete guide to the permit process from application to approval
• Industrial Equipment Transport — R&RM LLC's full-service industrial transport capabilities