1. Introduction

In the complex and demanding world of oil and gas exploration, drilling fluids serve as the lifeblood of operations. These engineered mixtures not only cool and lubricate the drill bit but also stabilize the wellbore, transport cuttings to the surface, and balance subsurface pressures. Without the right combination of fluid chemistry and additives, drilling efficiency can plummet and operational risks escalate.

Hydroxietylcellulosa (HEC) has emerged as one of the most reliable and versatile polymer additives used in drilling fluids. Its ability to increase viscosity, provide suspension stability, and enhance lubrication makes it an indispensable component in both onshore and offshore drilling projects.

LANDU, based in China, has established itself as a leading global supplier of premium HEC for the oil and gas industry. With years of manufacturing expertise, advanced production facilities, and a track record of meeting international standards, LANDU is the preferred choice for companies seeking consistent quality, technical support, and competitive pricing.

We don’t just manufacture chemicals — we engineer performance. Whether you’re operating in shale formations, high-temperature wells, deepwater environments, or other challenging geological conditions, LANDU’s HEC is engineered to support your operational success.

2. Understanding Hydroxyethyl Cellulose (HEC)

What is HEC?

Hydroxyethyl Cellulose is a non-ionic, water-soluble polymer derived from cellulose, the natural structural component of plant cell walls. By chemically modifying cellulose with hydroxyethyl groups, we create a polymer that disperses and hydrates in water to form a smooth, highly viscous solution.

Physical and Chemical Properties Relevant to Drilling

1. Kontroll av viskositet – HEC allows precise control over drilling fluid thickness, enabling better cuttings suspension and hole cleaning.
2. Non-ionic Nature – This makes HEC compatible with a wide variety of salts and chemicals, preventing unwanted reactions in brine-based fluids.
3. Termisk stabilitet – LANDU’s oilfield-grade HEC is engineered to withstand elevated downhole temperatures without loss of performance.
4. Shear Resistance – Maintains rheological properties under the high-shear conditions found in drilling circulation systems.

How is HEC Produced?

The process begins with purified cellulose, which undergoes an etherification reaction with ethylene oxide under alkaline conditions. Through careful control of substitution levels and particle size, we produce HEC grades optimized for either rapid hydration or delayed thickening, depending on the drilling application.

Grades and Specifications

LANDU offers multiple oilfield-grade HEC specifications, including:

• Fast-hydrating HEC for quick viscosity build-up in urgent drilling adjustments.
• Regular hydration HEC for standard drilling programs requiring steady viscosity control.
• Tailor-made OEM grades for unique drilling environments.