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Global Reach.
Local Precision.

Complementary General Trading and Oil & Gas Services delivers integrated energy solutions across the oil, petrochemical, and infrastructure sectors. From drilling to export logistics, we connect global demand with dependable production—efficiently, safely, and competitively.

Unmatched Oilfield Service Capabilities

Our capabilities span the entire upstream and downstream lifecycle. We offer comprehensive drilling and workover services, tubular running, coil tubing, thru tubing, surface well testing, EPF support, and advanced production technologies—ensuring maximum uptime and operational reliability.

We operate on a model built around precision, reliability, and measurable performance. Each project combines technical discipline, field-tested methodology, and data-driven decision-making. By aligning engineering expertise with commercial efficiency, Complementary General Trading and Oil & Gas Services delivers consistent outcomes across drilling, production, and export operations.

Founded to bridge the gap between production and international energy demand, Complementary LLC has evolved into a trusted name in oilfield services and petrochemical trade. Our foundation lies in decades of regional experience, global partnerships, and continuous investment in modern technologies. From upstream operations to downstream logistics, we’ve grown through consistent delivery and transparent collaboration.

Our leadership team is composed of engineers, field specialists, and industry strategists with proven experience across multiple basins and commodity markets. They drive a culture of operational excellence, safety, and accountability—ensuring every engagement reflects the company’s commitment to quality, integrity, and long-term partnership.

Responsible Global Sourcing

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ABOUT US

Drilling and Workover Services

Complete drilling and well-servicing solutions to maximize reservoir access and extend production life. Includes rig mobilization, re-entry, sidetracking, and well intervention.

Tubular Running Services

Specialized pipe handling and connection services for casing, tubing, and drill pipe. Focused on precision, safety, and minimizing rig time during well construction.

Fishing

Advanced downhole recovery techniques for lost or stuck equipment. Restores wellbore access quickly to minimize downtime and protect well integrity.

More our service

Black Barrel Oil Services - Subcompany of Complementary LLC

Black Barrel Oil Services, a subsidiary of Complementary Co LLC, delivers advanced geosynthetic and liner solutions tailored for the oil, gas, and industrial sectors. From drilling pond containment to waste management systems, our engineered materials ensure environmental protection and operational reliability. Every liner and geofabric we deploy is designed to withstand extreme conditions while meeting global performance and safety standards.

  • Specialized in pond, landfill, and contamination pit liners engineered for durability in oil, gas, and industrial operations.
  • Provides pipeline protection, road separation, drainage, and slope stabilization systems designed for harsh field conditions.
  • Delivers fire-resistant, multi-layer, and filtration liners that meet international standards for containment and environmental protection.
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The Advantages Are in the Quality of Products

We deliver consistent quality across every product line—from bitumen to urea—meeting or exceeding international benchmarks.

  • Strict quality assurance at all stages of sourcing and delivery
  • Full compliance with export regulations and safety standards
  • Long-term supply reliability to infrastructure, agriculture, and energy markets
  • Transparent processes and audited performance metrics
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YEAR EXPERIENCE

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SUCCESFUL PROJECTS

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HAPPY CLIENT

IRAQ

Deep-Well Redevelopment

UAE

Casing Installation

Oman

Coil Tubing Acid Job

Nigeria

Early Production Facility

Strategic Capabilities in Oil & Gas Services

Integrated Drilling Solutions

Full-cycle drilling, re-entry, and workover operations—customized for field conditions and production goals.

Downhole Intervention

Fishing, thru-tubing, and coiled tubing services to maintain flow and recover from wellbore issues.

Thermal Systems Engineering

Design and supply of boilers, heaters, and exchangers built for industrial durability and process optimization.

Production Acceleration

EPF deployment, real-time well testing, and flowback services to reduce lead times from discovery to revenue.

Export Logistics & Trade

End-to-end supply chain support for urea, bitumen, and petrochemicals—ensuring timely and compliant international delivery.

Field-Proven Technologies

Deployment of reliable production tools for flow assurance, pressure control, and artificial lift systems.

Why Choose Complementary LLC

Our Edge in Quality and Execution

  • Decades of combined expertise in upstream, midstream, and downstream operations.
  • Global sourcing and logistics infrastructure for consistent, on-time delivery.
  • Compliance with international safety and environmental regulations.
  • Strategic partnerships with producers and technology providers worldwide.
  • Proven track record in managing complex energy and industrial projects across diverse environments.

Our Business Execution Process

STEP 1
Preparation of project documents

Define technical scope, gather field data, and formalize project documents.

STEP 2
Creation of a project with a team On time

Assemble execution team, mobilize resources, and initiate services on agreed schedule.

STEP 3
Completion of the project and payment

Complete operational milestones, conduct QA/QC reviews, and close commercial agreements.

STEP 4
Machine maintenance if there is a problem
Provide post-operation support, performance reports, and optional maintenance if applicable.