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Double-line four-axle trailerized drilling floor

Double-line four-axle trailerized drilling floor

The Double-Line Four-Axle Trailerized Drilling Floor is a game-changing innovation in oilfield mobility. Designed as a fully integrated, road-transportable drilling floor module, this system enables complete rig packages to move between wellsites with unprecedented speed and efficiency—eliminating the need for large cranes and drastically reducing non-productive time.

No Crane Required – Self-Contained Rig-Up & Rig-Down：

Perhaps the most compelling advantage of the double-line four-axle trailerized drilling floor is its ability to rig up and rig down without large crane assistance. The trailerized design incorporates hydraulic systems that enable the drilling floor to be positioned, leveled, and prepared for operation entirely under its own power. This eliminates the cost, scheduling constraints, and safety risks associated with heavy-lift crane operations.

Rapid Rig Moves – 8 Hours or Less：

Field performance speaks for itself. SJ Petro’s trailerized workover rigs equipped with this drilling floor have completed 8-hour wellsite relocation operations in Kuwait. By comparison, conventional rigs often require days or even weeks to disassemble, transport, and reassemble between wells. For operators running multi-well pad programs or working in remote locations with limited infrastructure, this speed advantage translates directly into increased rig utilization and lower operating costs.

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Technical Specifications

The double-line four-axle trailerized drilling floor is available in multiple configurations to match different rig models and operational requirements. Below are the key specifications:

Parameter Specification
Axle Configuration Double-Line Four-Axle (two lines, four axles total)
Trailer Type Low-bed semi-trailer or full-trailer
Overall Dimensions (L×W×H) 14,760 × 3,200 × 2,920 mm (typical)
Gross Vehicle Mass 37,480 kg – 42,680 kg (depending on configuration)
Axle Load Distribution Up to 28,260 kg (two-line four-axle)
Kingpin Load (Fifth Wheel) 9,220 kg – 10,270 kg
Wheelbase 11,215 mm – 11,440 mm
Tire Specification 9.00-20 (typical)
Drill Floor Height 6 m (standard)
Rotary Table Opening Φ520.7 mm (20-1/2″) – customizable
Mast Compatibility XJ series workover rigs (XJ450 through XJ1200)
Integrated Components Driller’s cabin, auxiliary buildings, BOPE, walkways, handrails, stairs, V-door, mouse hole, rat hole
Operating Temperature Up to +55°C (desert configuration)
Rig-Up Method Hydraulic self-erection – no crane required
Transport Configuration Two-trailer system: host rig + drilling floor


Applications

The Double-Line Four-Axle Trailerized Drilling Floor is deployed across a broad spectrum of oilfield operations where rapid rig mobility and minimal site preparation are critical:

  • Multi-Well Pad Operations – Rapid moves between wells on the same pad, maximizing rig utilization and minimizing non-productive time

  • Desert & Remote Locations – Ideal for Middle Eastern, North African, and other desert environments where road infrastructure is limited and temperatures are extreme

  • Workover & Well Servicing – Complete drilling floor integration for XJ series workover rigs (XJ450 through XJ1200)

  • Mobile Drilling Operations – Supports trailer-mounted drilling rigs for shallow-to-medium depth drilling

  • Offshore Platform Support – Skid-mounted trailer configurations for platform operations

  • Urban-Adjacent Fields – Reduced site footprint and faster rig-up/rig-down minimize disturbance to surrounding areas

  • International Export Markets – Proven performance in Kuwait, Oman, Iraq, and other Middle Eastern markets

Product Types

SJ Petro offers the double-line four-axle trailerized drilling floor in multiple configurations to match various operational requirements:

1. Standard Double-Line Four-Axle Trailerized Drilling Floor – Complete integrated module for XJ series workover rigs, including driller’s cabin, auxiliary buildings, and BOPE integration.

2. Desert Configuration Drilling Floor – Enhanced with high-temperature seals, sand-resistant enclosures, and heavy-duty suspension for 55°C desert operations.

3. Low-Temperature Configuration Drilling Floor – Engineered for arctic and sub-arctic operations with cold-weather materials and heating systems.

4. BigEasy Series Trailerized Drilling Floor – Developed in cooperation with LOADMASTER, featuring unique full-trailer block structure for rapid assembly without cranes.

5. Parallelogram Substructure Drilling Floor – Foldable parallelogram structure that levels to the rotary table plane, complete with ladders, V-door, escape chute, walkways, and handrails.

6. Telescopic Substructure Drilling Floor – Two-body telescopic structure for easy hoisting and transport.

OEM & Customization Solutions

Every oilfield presents unique challenges, and SJ Petro’s engineering team delivers tailored solutions through our comprehensive OEM and customization capabilities:

  • Custom Axle Configuration – Double-line four-axle is standard, with options for other axle configurations based on load requirements and road regulations.

  • Custom Dimensions – Drilling floor dimensions and height can be designed according to client requirements.

  • Drill Floor Height Options – Standard 6m height with customization available.

  • Rotary Table Selection – Choose from various rotary table openings and configurations.

  • Integrated Equipment Packages – Full integration of driller’s cabin, auxiliary buildings, BOPE, and well control equipment.

  • Climate-Specific Engineering – Desert (55°C), low-temperature, and tropical configurations available.

  • Transport Compatibility – Customized to match your specific truck/tractor configuration and road transport regulations.

  • Turnkey System Integration – From drilling floor alone to complete rig packages with mast, drawworks, and power systems.

Why Choose SJ Petro?

Pioneer in Trailerized Drilling Technology

SJ Petro has been at the forefront of trailerized drilling and workover equipment for decades. Our BigEasy series – developed in cooperation with LOADMASTER – introduced the concept of "big and easy” to the industry, featuring unique full-trailer block structures that enable rapid assembly without cranes. We have also developed world-first快移快装模块钻机 and filled domestic gaps in全套拖挂钻机.

Proven Middle East Track Record

SJ Petro’s double-line four-axle trailerized drilling floors have been deployed in more than 10 units across Kuwait, Oman, and other Middle Eastern countries. The system has demonstrated 8-hour wellsite relocation capability in Kuwait and reliable 55°C desert operation.

Complete In-House Manufacturing

As a Sinopec Group subsidiary and China’s largest workover equipment manufacturer, SJ Petro maintains complete in-house design, manufacturing, and testing capabilities. Our 50,000 m² rig assembly yard and 24 rig-up positions enable efficient production and quality control.

API-Certified Quality

SJ Petro holds API (American Petroleum Institute) , ISO9001 , and HSE management system certifications. Our designs and manufacturing processes comply with API Spec Q1, 4F, 7K, 8C, and RP500.

Global Export Experience

Our trailerized drilling floors and workover rigs have been exported to more than 30 countries and regions worldwide, including the United States, Kuwait, Oman, Iraq, Indonesia, Malaysia, South America, and Western Africa.

One-Stop Solution Provider

Beyond manufacturing, we offer equipment inspection, testing, and major overhaul services. From initial design to field service and spare parts supply, SJ Petro delivers complete oil and gas exploration and production equipment solutions.

Frequently Asked Questions

Q: What is a double-line four-axle trailerized drilling floor?

A: It is a fully integrated, road-transportable drilling floor module mounted on a double-line four-axle trailer. The module includes the drill floor, driller’s cabin, auxiliary buildings, and BOPE, enabling complete rig moves in just two trailers without requiring large cranes.

Q: What rig models is this drilling floor compatible with?

A: The double-line four-axle trailerized drilling floor is compatible with SJ Petro’s XJ series workover rigs, typically XJ450 through XJ1200. Custom configurations are available for other rig models.

Q: How fast can the rig be moved with this drilling floor?

A: Field experience in Kuwait demonstrates 8-hour wellsite relocation capability. This represents a dramatic improvement over conventional rigs that often require days or weeks to move.

Q: Does the drilling floor require a crane for rig-up?

A: No. The trailerized drilling floor is designed for self-erection using hydraulic systems – no large crane assistance is required.

Q: What is the maximum operating temperature?

A: The desert configuration is engineered for reliable operation up to 55°C.

Q: What is included in a typical drilling floor package?

A: A complete package includes the trailerized drilling floor module with driller’s cabin, auxiliary buildings, BOPE integration, walkways, handrails, stairs, V-door, mouse hole, and rat hole.

Q: What is the total mass of the drilling floor trailer?

A: The gross vehicle mass ranges from 37,480 kg to 42,680 kg depending on configuration and equipment.

Q: Are your products API certified?

A: Yes. SJ Petro holds API, ISO9001 , and HSE management system certifications. Our designs comply with API Spec Q1, 4F, 7K, 8C, and RP500.

Q: Do you offer OEM or customized solutions?

A: Absolutely. We offer comprehensive customization including axle configuration, drilling floor dimensions, drill floor height, rotary table selection, integrated equipment packages, and climate-specific engineering.

Q: What is your manufacturing capacity and lead time?

A: We have the largest workover equipment manufacturing base in China with a 50,000 m² rig assembly yard and 24 rig-up positions. Lead times vary by configuration – contact our sales team for specific project timelines.

Q: Do you provide after-sales support and spare parts?

A: Yes. We offer comprehensive after-sales support including spare parts supply, equipment inspection, testing, and major overhaul services.

Q: Where has this drilling floor been deployed?

A: SJ Petro’s double-line four-axle trailerized drilling floors have been deployed in more than 10 units across Kuwait, Oman, Iraq, and other Middle Eastern countries.

Tag: Dual well operation rig | Dual well rig manufacturers | Automated wellhead devices | Wellhead automation manufacturers | Wellhead operation automation

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