Tamponage cement – properties and areas of application

Tamponage cement is a specialty kind of cement with distinct qualities that make it ideal for certain industrial and building uses. This substance is mostly utilized in the oil and gas sector, where it is essential for stabilizing and sealing wellbores. In order to stop fluid migration and maintain the integrity of the well structure, it must quickly set and form a strong, impermeable barrier.

Tamponage cement’s strong resistance to high temperatures and pressures is one of its primary characteristics. Because of this, it is perfect for use in deep wells, where the environment can be extremely harsh. It also adheres firmly to the surrounding rock formations and the casing thanks to its excellent bonding capabilities. This produces a strong seal that is resistant to the harsh conditions encountered in the extraction of oil and gas.

Tamponage cement is used in civil engineering projects that call for dependable stabilization and sealing solutions, in addition to the energy sector. In order to strengthen concrete structures and stop water infiltration, it is frequently used in grouting operations to fill in gaps and cracks. This adaptable material is a useful tool in a variety of construction scenarios because it can be customized to meet the needs of a given project.

Professionals in the building and energy sectors need to understand the characteristics and uses of tamponage cement. Because of its special qualities, it can solve difficult problems and guarantee efficiency and safety in a variety of projects. Tamponage cement provides an enduring solution for a dependable and efficient means of sealing deep wells or reinforcing concrete structures.

Property Application
High compressive strength Used in foundations and structural supports
Low shrinkage Ideal for large pours and structural stability
Quick setting Suitable for emergency repairs and underwater construction
Durable Perfect for harsh environments and heavy use areas

Features of plugging cement

Specialized cement is used to prepare the plugging works solution. Content:

  • has a fine grinding;
  • hardens in a short time, while the mixture of cement and water retains fluidity for a long time, which allows it to be pumped freely;
  • sets and hardens despite contact with water;
  • compatible with various additives.

Because cement slurry is resistant to environmental factors, even those that can be aggressive, it can be used to create monolithic structures that last for many years without losing strength.

Composition

Crushed clinker (about 80%) and gypsum (2–3.5%) serve as the raw materials for the creation of cement slurry. They are mixed with different minerals to create working mixtures with certain characteristics. There are various kinds of cement slurries used:

  • Hygroscopic. Triethanolamine is used as an additive.
  • Sandy. Gypsum and quartz sand are added to the main composition.
  • Weighted. Iron ore minerals (magnetite, hematite, spalt) are among the weighting additives.
  • Salt-resistant. Finely ground quartz sand added to the solution allows you to create a material that protects pipes from corrosion under the influence of groundwater with a high salt content.

Unique cement A sulfate-resistant mixture that can withstand harsh conditions is a feature of Portland cements.

Lightweight cements are used to cement deep wells in challenging geological conditions, such as sections with absorbent or hydraulic fracturing-prone layers. Additives such as ash, tripoli, diatomite, aluminosilicate microspheres, etc. that lower the composition’s density are used to create lightweight oil well cement.

Particularly lightweight cements designed for deep diving and shell repair have even lower densities. These materials have high adhesion, stick well to the pipe’s old cement shell, fill gaps and cracks, and are simpler to pump. Kaolin, hollow aluminosilicate microspheres, etc. are examples of additives.

The distinction between expansion cement and cement. It is essential to construct a cement stone shell that is resistant to shrinking when cementing wells in loose, porous rocks.

Because expanding cement contains additives, crystalline products are formed in the cement mortar as a result of chemical reactions. As a result, as the solution hardens, its volume increases and the resulting stone has a dense structure. When they harden, conventional cements don’t swell.

Marking of well cement

GOST 1581-96 is followed in the production of well cement. The substance bears the PTC (Portland cement) mark. Based on its attributes and qualities, well cement is:

  • Without additives (I, I-G, I-H), with the addition of minerals (II), with impurities that regulate the density of the composition (III).
  • Weighted (Ut), lightened (Ob);
  • For use at low and normal (15-50°C), moderate (51-100°C) and elevated (101-150°C) temperatures;
  • Regular and sulfate-resistant (SS).

The cement type, sulfate resistance, average density, maximum application temperature that is allowed, degree of plasticization (PL) or hydrofication (GF), and GOST number are all indicated by the standard marking.

The grade of oil well cement and the aspects of its production determine its performance characteristics. The ranges that the material indicators can fall within are displayed in the table below.

Indicator name, units.of measurement Possible range, numerical value
Compressive strength after 8 hours, MPa When hardening at a temperature of 38 ° C – 2.1 60 ° C – 10.3
Bending strength, MPa From 0.7 to 3.5 depending on the grade of PC
Grinding fineness:

Remaining material on a sieve with mesh size of 008, %, or less

The product certificate includes details about the batch volume and manufacturing date in addition to these properties of oil well cement.

Tamponage cement, sometimes referred to as plugging or sealing cement, is a specialty kind of cement that is mostly used in the sealing and stabilization of oil and gas wells in order to stop fluid migration between subsurface formations. Because of its special qualities, which include a quick setting time and a high compressive strength, it is perfect for building safe, impermeable barriers. Tamponage cement is used in construction, outside the oil and gas sector, to seal joints and fractures in concrete buildings, guaranteeing their longevity and avoiding water infiltration. This adaptable substance is essential to preserving the integrity and security of numerous industrial and construction uses.

Application areas

The primary reason oil well cement is used is that it exhibits high strength indicators right from the start of the hardening process. The main purpose of this kind of cement is to plug gas and oil wells. The drilling mixture is simultaneously displaced during the cementing process.

Using pumping equipment, well cement is pumped in; the volume of water added should be twice that of the dry components to guarantee the fluidity of the solution. The resultant mass, or pulp, has high mobility and, upon hardening, forms a dense monolith that is impervious to shrinkage between the well’s walls and casing pipe. In this instance, the material is firmly adhered to the rock-drilled borehole’s walls as well as the pipe.

The cement shell protects the casing pipe from groundwater contact, shifting layers, and harsh gaseous environments. In order to prevent damage to the casing itself, well cement is used to reduce the depth of the well and strengthen its bottom.

In construction, this kind of cement is essentially nonexistent. The use of grouting cement for a foundation consisting of bored piles that are placed on challenging soils is an exception.

Conclusion

Oil well cement producers create materials with a range of properties that can be used in any environment.

The following factors are considered when choosing a PTC brand:

  • well depth;
  • geological formation characteristics;
  • temperature level in the mine (affects the time of solution hardening);
  • salt content in groundwater, etc..

Fresh oil well cement that was kept in sealed packaging is essential to ensuring that the completed monolith satisfies all specifications.

Tamponage cement is a highly adaptable and indispensable material for a wide range of industrial and construction uses. Because of its special qualities, it is particularly well suited for stabilizing and sealing wells, especially those in the oil and gas sector. This kind of cement provides long-term durability and dependability in harsh settings by providing exceptional resistance to high temperatures and pressures.

Tamponage cement finds utility not only in well construction but also in environmental protection initiatives. It successfully seals off wells that have been abandoned, stopping dangerous materials from seeping into the nearby groundwater and soil. This promotes ecological balance and public health protection.

Tamponage cement is a preferred option for engineers and construction professionals due to its flexibility in various situations. Efficient and secure sealing is ensured by its capacity to solidify rapidly and create a robust adhesive bond with diverse surfaces. This improves a structure’s stability and safety while also making construction projects more efficient overall.

Tamponage cement is an essential part of contemporary construction and environmental management, all things considered. Its significance in maintaining the integrity and safety of diverse structures is highlighted by its broad range of applications and dependable performance. Tamponage cement works well for a variety of sealing and stabilization problems, both in industrial settings and in ecological preservation initiatives.

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Anna Vasilieva

Journalist with a technical education, specializing in construction topics. I can explain complex technical topics in simple and accessible language.

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