Heavy duty coiled tubing equipment

Technical Specifications – Heavy Duty CTU Models

Our heavy duty coiled tubing equipment line is available in several capacity classes. Custom configurations for specific depth and pressure requirements are available.

Heavy Duty CT Applications – Real‑World Operational Scenarios

Deepwater offshore intervention (Gulf of Mexico, Brazil, West Africa) – Halliburton’s deepwater Gulf of Mexico intervention system used a 36,000‑ft string of 2‑3/8″ coiled tubing constructed from 120,000‑psi yield strength alloy steel—the longest and strongest string ever deployed. A 750‑ton tension lift frame handled the combined load of reel, injector, and BOP stack. This level of heavy duty equipment is mandatory when water depths exceed 5,000 ft and well pressures approach 10,000 PSI.

Long lateral shale cleanouts (Permian, Vaca Muerta, Sichuan) – Extended reach wells with laterals exceeding 10,000 ft require injector heads with sustained push capacity >70,000 lb and high‑flow HPUs (100+ GPM) to maintain circulation velocity across the entire lateral length. Standard CT units simply cannot deliver the necessary hydraulic horsepower.

Large‑diameter milling & drilling (frac plug drill‑outs, cement milling) – Heavy duty CT units equipped with downhole mud motors and high‑torque injector drives can mill frac plugs in batch mode at rates exceeding one plug per 20 minutes. The combination of high pull capacity, large tubing O.D. (2‑7/8″ or 3‑1/2″), and high hydraulic horsepower makes this economically viable. For heavy milling, the increased torque capacity of the injector head and the larger tubing string provide the necessary power transmission without string failure.

HP/HT well interventions (North Sea, Southeast Asia, Middle East) – Wells with bottomhole pressures exceeding 10,000 PSI and temperatures above 300°F require 15K PSI BOP stacks, corrosion‑resistant tubing alloys, and injector heads rated for continuous heavy pull. Heavy duty CT equipment is not optional—it is the only safe way to intervene in these reservoirs.

Massive sand & debris cleanout (deepwater Gulf of Mexico, offshore Brazil) – High solids concentrations and long horizontal sections demand a large‑diameter coiled tubing string (2‑3/8″ or 2‑7/8″) to provide sufficient annular velocity for debris transport. The combination of a high‑torque reel drive and high‑flow HPU ensures that large volumes of sand and scale can be lifted out of the well without multiple trips.

Product Types – Heavy Duty CTU Configurations

We offer heavy duty coiled tubing equipment in the following configurations:

1. Truck‑Mounted Heavy Duty CTU – Heavy chassis with integrated crane, large reel, high‑capacity HPU, and full BOP stack. Road‑legal with proper permitting. Ideal for multi‑well onshore campaigns in unconventional basins where heavy equipment moves frequently between pads.

2. Trailer‑Mounted Heavy Duty CTU – Towed configuration for operators with existing prime movers. Lower capital cost than truck‑mounted, still fully mobile. Suitable for onshore heavy intervention where truck weight restrictions are not prohibitive.

3. Skid‑Mounted Heavy Duty CTU – For offshore platform installation and barge‑based operations. Marine‑grade coatings, stainless steel fasteners, and ATEX certification for hazardous areas. Designed to be lifted by platform cranes with integrated lifting lugs and tie‑down points.

4. Offshore Module CTU – Modular design for semi‑submersibles and drillships, with subsea BOP interface and 750‑ton tension lift frame. Features motion‑compensated reel and injector mounts. 15,000 PSI BOP stack standard. Used in Gulf of Mexico, Brazilian pre‑salt, and West African deepwater intervention campaigns.

5. Electric‑Drive Heavy Duty CTU (Zero Emission) – Full‑electric drive system eliminates diesel engines. Powered by grid electricity or onboard generators with zero emissions during operation. Reduced noise footprint, ideal for urban infill and environmentally sensitive operations. Lower maintenance cost than diesel‑hydraulic systems.

6. Specialty CRA (Corrosion Resistant Alloy) CTU – Designed for sour gas (H₂S) and CO₂ service, with NACE MR0175 compliant components throughout, stainless steel or nickel alloy tubing strings, and specialized stripper rubber materials for aggressive chemical environments.

Why Choose SJ Petro for Heavy Duty Coiled Tubing Equipment?

• Sinopec‑backed engineering – As a direct subsidiary of China’s largest oilfield equipment group, we have 314 R&D engineers, 2,100+ precision machines, 16 dedicated production lines, and a 50,000 m² rig‑up yard. We build the entire CT unit—not just assemble components—ensuring seamless integration from reel to BOP.

• API 16ST & 5C8 certified – Our well control equipment meets API 16ST standards for BOP assembly and operation, and our tubing care and maintenance follows API 5C8 guidelines. Third‑party inspection (ABS, DNV, BV, SGS) is always welcome.

• Ultra‑high capacity components – Our CTU‑250 and CTU‑300 models feature injector heads up to 200,000 lb pull capacity, reels sized for 36,000 ft of 2‑3/8″ tubing, and HPUs up to 1,200 HP. These are among the highest capacity units available from any manufacturer.

• Heavy duty materials and construction – Marine‑grade coatings, corrosion‑resistant alloys, low‑temperature steel, and NACE compliance ensure reliable operation in deepwater, Arctic, and sour service environments. Our offshore systems are ATEX‑certified for hazardous areas.

• Integrated data and control systems – Our SOFElink platform provides real‑time monitoring, data logging, remote diagnostics, and fleet management. Touchscreen HMI, automated sequences, and emergency shutdown systems are standard.

• Global field support & spare parts – We stock CT‑specific spares—injector chain and block assemblies, stripper rubbers, BOP seal kits, hydraulic pumps, sensors, and PLC modules—in Dubai, Singapore, and via our Houston agent. Most parts ship within 48‑72 hours. 24/7 remote diagnostics and on‑site field service are available.

• Flexible financing – Outright purchase, leasing, subscription, and performance‑based contract options.

• Warranty – 24 months on structural components (reel frame, lift frame, BOP bodies), 12 months on hydraulic and mechanical wear components. Extended warranty available for fleet purchasers.

Frequently Asked Questions (FAQ)

Q1: What distinguishes heavy duty coiled tubing equipment from standard CT units?
Heavy duty units are defined by substantially higher specifications: injector head pull capacity >100,000 lb (often 140,000–200,000 lb); large tubing O.D. (2‑3/8″ to 3‑1/2″); extended reel capacity (>25,000 ft); high‑pressure HPUs (5,000–6,000 PSI, 100+ GPM); and BOP stacks rated to 10,000‑15,000 PSI per API 16ST. These specifications are required for deepwater, HP/HT, extended reach, and large‑scale milling operations where standard units cannot deliver adequate force, flow, or pressure capacity.

Q2: What is the maximum well pressure your heavy duty CT systems can handle?
Our CTU‑200 and CTU‑250 models handle well pressures up to 10,000 PSI. The CTU‑300 Ultra Heavy model is rated to 15,000 PSI with full API 16ST certification. For deeper HP/HT wells requiring 20,000 PSI, custom designs are available. Always match the BOP stack pressure rating to the well’s maximum anticipated surface pressure.

Q3: What is the largest coiled tubing string you have deployed?
We have designed and manufactured systems capable of handling strings exceeding 36,000 ft of 2‑3/8″ tubing with yield strengths up to 120,000 PSI. For 2‑7/8″ strings, capacities exceed 25,000 ft. The specific combination of reel drum size, injector head rating, and lift frame capacity is engineered for each deployment.

Q4: Can your heavy duty CT units perform milling and drilling with downhole motors?
Yes. Our injector heads provide the push capacity needed to maintain consistent weight on bit (WOB) for downhole motors, while high‑flow HPUs deliver the hydraulic power to drive the motor at optimal RPM. Combined with large‑diameter tubing for reduced pressure drop, heavy duty CT units are field‑proven for milling bridge plugs, frac plugs, scale, and cement, as well as light drilling of shoestring sidetracks.

Q5: How do you manage coiled tubing fatigue life on deep wells?
We follow API RP 5C8 (Care, Maintenance, and Inspection of Coiled Tubing) recommendations for fatigue tracking. Each tubing string is assigned a unique identifier, and its operational history—pressure cycles, bending strains, corrosion exposure—is recorded in our fatigue management software. Remaining safe cycles are continuously updated, and operators receive alerts when the string approaches its safe service limit. For heavy duty strings, we recommend annual inspection and tubing sample analysis.

Q6: What are the power requirements for your heavy duty HPUs?
For diesel‑hydraulic units, engine horsepower ranges from 550 HP (CTU‑200) to 1,200 HP (CTU‑300). Fuel consumption is approximately 15‑25 gallons per hour at full load, depending on operating conditions. For electric‑drive units (zero‑emission option), power requirements range from 450 kW to 900 kW, depending on the configuration. We recommend on‑site generation or dedicated grid connection for electric units.

Q7: Do you offer electric‑drive heavy duty CT units?
Yes. Our full‑electric drive CT units are powered by grid electricity or onboard generators with zero emissions during operation. They use electric motors for reel, injector, and pump drives, eliminating diesel engines and reducing noise and maintenance. Ideal for urban infill, environmentally sensitive areas, and operators with access to reliable grid power. All electric‑drive units maintain the same heavy duty specifications as diesel‑hydraulic models.

Q8: What is the typical lead time for a heavy duty coiled tubing unit?
CTU‑200 (skid or trailer‑mounted): 8‑10 months. CTU‑250 (offshore module): 10‑12 months. CTU‑300 (ultra heavy): 12‑14 months. Rush orders (CTU‑200, 6‑8 months) are available for an additional fee.

Q9: What documentation do you provide with each CT unit?
You receive: API 16ST certificates for BOP stack and pressure control equipment, API 5C8 documentation for tubing care and inspection, material test reports (EN 10204 3.1) for all pressure components, hydrostatic test certificates (1.5× rated pressure), function test reports for injector and reel, electrical schematics, hydraulic circuit diagrams, operations and maintenance manuals, and as‑built drawings.