Cementing Products

Cement is used as a sealing material while drilling an Oil and Gas well. Pumping cement behind the casing provides a barrier to the fluid flow from or into the formation and bonds the casing to the formation. This process is known as a Primary Cement Job.

Cement also serves other purposes, such as sealing off perforated casing or plugging zones.

• Preventing fluids from flowing between different formations or to the surface.
• Bonding the casing to the formation.
• Supporting the casing string.
• Protecting the casing from corrosion by formation fluids.
• Sealing off troublesome zones.

A successful Primary Cementing Job is essential for well integrity to allow continued drilling operations. Secondary or Squeezing Cementing Jobs are also performed when cement needs to be pumped into the well and forced into the formation.

There are various types of cement powder used for cementing oil and gas wells. The properties of each powder differ when mixed with water due to their distinct chemical compositions.

• Inexpensive and suitable for shallow depths where no special requirements are needed.
• Class B offers sulfate resistance, making it more durable than Class A.

• Hardens quickly because of its high C3S concentration, making it suitable for fast-setting applications.

• These are expensive due to their properties that make them ideal for deep wells where high temperatures and pressures are present. Known as retarded cements, they slow down the hardening process to withstand these extreme conditions.

• The most commonly used powders in oilfield cementing. These classes are compatible with a wide range of additives and can handle various pressures and temperatures.
• Class G is the most versatile and can be used at temperatures up to 200°F without additives, while Class H, with its coarser grind, offers better retardation properties for deep well applications.

• Composition: Cenosphere is a lightweight, inert, hollow sphere primarily made of silica and alumina, filled with air or an inert gas. Its unique structure contributes to its low density and high strength.
• Manufactured In: Produced in India, ensuring high quality and adherence to industry standards.
• Usage: In the oil and gas industry, cenosphere is used as an additive in drilling mud. This application enhances efficiency and extends the service life of drilling equipment, making it a valuable component in well drilling operations.
• Density Range: The density of cenosphere ranges between 0.70 - 0.85 g/cc, providing a lightweight solution that maintains strength.
• Crush Strength: With a crush strength of up to 5000 PSI, cenosphere withstands significant pressure, ensuring durability and effectiveness in challenging drilling conditions.

The use of cenosphere in drilling applications not only improves operational efficiency but also contributes to the longevity of drilling equipment by reducing wear and tear.

• Composition: Hollow glass microspheres (PGM) are ultra-lightweight, inorganic non-metallic powders, developed as versatile and high-performance lightweight filler material.
• Crush Strength: These products are designed for low to medium crush values, making them suitable for oilfield applications.
• Features: PGM offers a unique combination of shape and size, lower density, and higher compressive strength, providing superior strength-to-density ratios. This reduces fluid loss and formation damage during well completion.
• Benefits: PGM improves pressure stability, minimizes formation cracking, and reduces rework, leading to greater resource efficiency and cost savings.
• Health and Safety: PGM reduces dust exposure for cementing crews, improving handling safety and contributing to a healthier work environment.
• Efficiency: The larger particle size of PGM results in lower slurry rheology, meaning less energy is required for pumping, enhancing operational efficiency.

Overall, PGM's advanced properties enhance drilling performance and safety while offering environmental and cost benefits.

• Purpose: Silica Sand/Flour inhibits strength retrogression in oil well cements, especially at elevated temperatures.
• Cement Extender: Increases low shear viscosity, preventing sedimentation in the cement and acting as a cement extender.
• Application: Commonly used with refractory-type cements in well cementing to counteract high temperatures that degrade compressive strength.
• Mixing Ratio: Typically mixed with cement at 35-40% BWOC (by weight of cement). In the presence of CO2, the ratio can be reduced to 20% BWOC to enhance properties, reduce permeability, and counteract strength retrogression.
• Benefits: A cement mix with a silica-to-cement ratio of 1.0 or less tends to have higher compressive strength and lower water permeability, improving overall well integrity.

Silica Sand/Flour plays a crucial role in maintaining cement strength and durability in high-temperature wells, ensuring effective performance and reduced permeability over time.

Dispersant Pacific 12D is used to reduce the viscosity of cement slurries, allowing for smoother flow and improved workability during cementing operations. It plays a crucial role in the design of high-density slurries and enhances fluid loss control, which is critical for maintaining well integrity.

• Reduces slurry consistency, ensuring easier handling and pumping during cementing operations.
• Enhances the design of high-density slurries by improving fluid loss control, which prevents formation damage.
• Helps optimize slurry performance, especially in challenging well conditions where fluid loss is a concern.

Dispersants like Pacific 12D are essential in oil well cementing to ensure a consistent and manageable slurry, leading to improved well integrity and operational efficiency.

Defoamer AF grades are used to prevent foaming during slurry mixing, a common issue caused by many additives in cementing operations. Foaming can lead to airlock in centrifugal pumps, affecting both pumping pressure and overall efficiency.

• Prevents airlock in pumps caused by foam formation during slurry mixing.
• Improves the efficiency of pumping operations by maintaining consistent pressure.
• Widely used in the cementing industry due to its excellent defoaming properties.

Using defoamers like AF grades helps maintain the integrity of the cement slurry, ensuring smoother operations and better well integrity in oilfield applications.

Silica Liquid Pacific SF 59 reacts with calcium hydroxide during the cement hydration process, creating an additional phase of calcium-silica-hydrogen (CSH). This reaction improves the strength and durability of the cement.

• Increases compressive strength by promoting the formation of CSH during cement hydration.
• Affects the thickening time, compressive strength, porosity, and permeability of the cement, leading to improved overall performance.
• Helps enhance the longevity and integrity of cement in oil well applications.

Silica Liquid Pacific SF 59 plays a crucial role in ensuring the strength and durability of cement in challenging well environments by optimizing hydration and strengthening processes.

Expanding Agent Pacific EA 201 causes the exterior dimensions of set cement to grow gradually when exposed to down-hole fluids. This controlled expansion improves the bond between the cement, the pipe, and the formation.

• Enables minor growth in the exterior dimensions of cement slurry, improving bonding to pipe and formation.
• Prevents micro-annulus formation by enhancing cement integrity.
• Improves well stability by ensuring a stronger bond in challenging conditions.

The controlled expansion of Pacific EA 201 provides improved cement bonding and well integrity, making it an essential additive for oilfield cementing applications.

Anti Setting Agent Pacific ASA 21 is utilized in cementing operations to allow the cement to settle properly while minimizing the inclusion of sediment solids. This helps prevent sedimentation issues in the cement slurry.

• Prevents sedimentation by ensuring even distribution of cement particles.
• Enhances slurry stability, leading to improved pumpability during cementing operations.
• Helps maintain the integrity of the cement by reducing the risk of sediment build-up.

By using Anti Setting Agent Pacific ASA 21, operators can achieve a more reliable and effective cementing process, ensuring optimal well integrity and performance.

Fluid Loss Chemicals HEC grades are additives designed to reduce the rate at which water from cement is forced into permeable formations, especially under positive differential pressure. These additives help maintain the integrity of the cement and the wellbore.

• Reduce water loss from cement slurries, enhancing cement performance in permeable formations.
• Also known as macro plugging materials, they help plug zones that are unconsolidated or weak.
• Large particulates can be introduced into the cement slurry to prevent fracturing or bridge existing fractures.
• Particles should have a broad size distribution and sufficient strength to maintain integrity without excessive acceleration or retardation of the setting process.
• They should be inexpensive and non-toxic to minimize environmental impact and operational costs.

By effectively managing fluid loss, HEC grade additives contribute significantly to the overall performance and reliability of cementing operations in oil and gas applications.

Retarder Pacific RT 100 is used to increase the setting or thickening time of cement slurries, particularly in high-temperature environments. It helps manage the setting process without compromising the compressive strength of the cement.

• Increases the time available for cement placement and adjustments in challenging conditions.
• Prevents premature setting, allowing for longer workability during application.
• Does not decrease compressive strength but rather slows the rate of strength development, ensuring the cement achieves optimal performance.

Using Retarder Pacific RT 100 in cementing operations helps ensure better control over the setting process, improving overall well integrity and operational efficiency.

High Temperature Retarder - RT 200 is designed to meet the challenges presented by variations in well conditions, specifically in achieving proper zonal isolation. This retarder is utilized to slow down the setting of cement, extend pump times, and allow for the cement to set accurately in the desired location.

• Effective for a broad spectrum of cements and drilling temperatures.
• Designed for moderate to high circulating temperatures, typically between 212°F to 245°F (100°C to 118°C).
• Facilitates optimal performance during cementing operations in challenging environments.

By employing High Temperature Retarder RT 200, operators can ensure better control over the cement setting process, enhancing overall well integrity and performance in high-temperature conditions.

Latex Pacific L68 is utilized to improve gas-migration control, enhance durability, and strengthen bonding in cementing applications. Additionally, it offers excellent fluid-loss control and imparts some acid resistance to cement mixtures.

• Improves bonding between cement and well surfaces, ensuring better adherence.
• Provides gas-migration control, crucial for maintaining well integrity.
• Enhances the durability of the cement, allowing it to withstand harsh conditions.
• Offers fluid-loss control, minimizing water loss during the setting process.
• Imparts acid resistance, making it suitable for environments where acidic conditions may be present.

Incorporating Latex Pacific L68 into cementing operations ensures optimal performance and reliability, contributing to the longevity and integrity of the well.

Weighing Agents WA grades are crucial for formulating high-density cement slurries, which are often required in wells where bottom hole pressure is high.

• Facilitate the creation of dense cement slurries that can withstand elevated pressures.
• Help prevent wellbore collapse by counteracting high-pressure conditions.
• Improve overall cement performance and reliability during the cementing process.

Utilizing Weighing Agents WA grades ensures that cementing operations are effective in high-pressure environments, contributing to the stability and integrity of the well.

Gelling agents are essential in drilling and hydraulic fracturing operations within the oil and gas industry. They function by increasing the viscosity of drilling fluids, which is crucial for suspending solids such as proppants, transporting materials, and controlling fluid loss. By optimizing the fluid's properties, gelling agents enable better control over the flow characteristics, ultimately improving the efficiency of oil extraction processes.

• Optimizes fluid behavior during oil extraction.
• Improves control over solid suspension and material transport.
• Reduces fluid loss for more efficient drilling and fracking.

Spacers are specialized fluids utilized during the cementing process in oil and gas wells. Their primary function is to create a clean interface between different fluids, such as drilling mud and cement. By effectively displacing drilling fluids from the wellbore, spacers help ensure that the cement bonds properly to both the casing and the surrounding formation.

• Displaces drilling mud for cleaner wellbore surfaces.
• Improves cement adhesion to the casing and formation.
• Contributes to long-term well integrity and stability.

The effective use of spacers is essential for successful well completion and the long-term stability of the well, making them a critical component in cementing operations.

Self-Healing Cement is an innovative material engineered to automatically repair any cracks or microfractures that develop after the cement has been placed in oil and gas wells. This advanced material reacts to fluids that enter the cracks, initiating a healing process that restores the cement’s sealing capabilities.

• Reacts to fluids to seal cracks and fissures.
• Maintains well integrity over time.
• Minimizes the need for maintenance or repairs.

By ensuring continued sealing performance without intervention, self-healing cement enhances the longevity and reliability of cemented wellbore structures.

Micro-Fine Cement is a highly effective material used in cementing applications, particularly for sealing fine cracks and enhancing wellbore integrity. Its small particle size allows it to penetrate and fill even the tiniest voids, making it ideal for addressing issues related to permeability and fluid migration.

• Addresses permeability and fluid migration challenges.
• Enhances wellbore stability.
• Ideal for repairing micro-annuli and lost circulation.

Micro-fine cement is particularly beneficial in situations where traditional cement products may struggle to provide adequate sealing, making it a crucial addition to the cementing toolkit.

Sodium Silicate Liquid, also known as water glass, is a versatile chemical compound widely used in oilfield applications. It serves multiple functions, primarily as a sealant and stabilizer, improving the integrity of wellbores by controlling water influx and enhancing cement bonding.

• Acts as a stabilizer and binder.
• Improves wellbore sealing and integrity.
• Enhances cement performance and oil recovery efforts.

Its unique properties make sodium silicate liquid an essential chemical in the oilfield, contributing significantly to improved operational efficiency and effectiveness in well cementing processes.