Products

• Overcomes high temperature degradation (when wellbore temperatures exceed 115°C)
• Best suited for temperatures ranging from 10-35°C for placing plugs
• Meets ERCB Directive
• Typically used on a small scale for dump-bail treatment

Oilfield Cementing: Typical use on a small scale is for dump-bail treatments. The product is batched in small volumes according to the following blend table, and dumped down the wellbore using conventional rig equipment. After a period of time the cement sets, providing a small, hard plug in the problem area.

NOTE: Strengths are for reference only. Actual values may vary due to changing wellbore conditions, variations in density, and water quality. Samples should be taken at the time of treatment and observed at estimated wellbore temperature for strength development.

At temperatures below 30°C, calcium chloride can be added in a small amount, to accelerate the set time if required. Typical dosage is 0.5-1% w/w, depending on well depth and wellbore temperature. Slurry viscosity and working time will be reduced substantially. (Exercise extreme care in the addition of calcium chloride. In itself calcium chloride is a corrosive material and will cause skin burns. If poorly mixed, it can cause excessive heat through hydration, potentially leading to a flash set of the cement before placement has occurred.)

Oilfield Cementing, High Temperature Application: This cement blend is not designed for use where wellbore temperatures exceed 30-40°C during plug placement. However, Earth Pro Thermal 40 Cement is stable to +/-360°C, providing the optimum slurry density of 1880-1900 kg/m³ is maintained. Long-term effects (30 days or more at 300-340°C) indicate only minor loss in compressive strength, and a slight increase in permeability.

Earth Pro Thermal 40 Cement will meet the ERCB Specification in Directive 20, Open Hole Abandonment Requirements, Section 4.2, “Open-Hole Abandonment of Wells That Have Penetrated Oil Sands Zones”, and will provide a minimum compressive strength of 3500 kPa in 48 hours at temperatures up to 360°C.

Storage Precautions: Earth Pro Thermal 40 Cement is not hazardous. However, if product becomes wet through unforeseen circumstances, some heat will be given off due to hydration. Avoid excessively humid conditions. Store in a cool dry place.

Handling Precautions: As product is mixed with water, some heat evolution will occur. Caution should be exercised to mix continually until ready to place the slurry in the dump-bail. Since Earth Pro Thermal 40 Cement is caustic in nature, it will cause severe burns to eyes and sensitive skin areas. Wear the appropriate safety goggles and protective equipment when handling this product.

Appearance: Finely textured greyish powder

Bulk Density: 0.741 m³/ton

Composition: Oilwell 'G' Cement / 325 Silica Flour

Type: Thermally stable oilwell cement

Solubility: Insoluble in water

pH: 10.0 - 12.0 (in fresh water)

Water Requirement: 0.41 m³/ton

WHMIS: Controlled (see MSDS)

TDG: Not regulated

Packaging: 20kg bag / bulk