Single-sack, temperature-stable bridging agent for all mud systems
C‐SEAL F industrial carbon blend is a fine‐sized plugging agent used to bridge and seal permeable formations in water, oil, or synthetic‐based mud systems. C-SEAL F reduces differential‐pressure sticking tendencies by bridging and plugging when drilling depleted zones where high differential pressures exist.
It can be used to control seepage‐to‐partial‐loss circulation zones. C‐SEAL F blend is completely inert and does not affect the rheological properties of drilling fluid systems. It reduces torque and drag by increasing lubricity. C‐SEAL F blend lowers the spurt and total PPT filtrate loss values. C‐SEAL F grind material is an effective and economical blend because it is not removed by the shakers when mixed in the entire circulating system.
Applications
C‐SEAL F blend is designed to bridge and seal permeable formations, reducing the possibility of differential sticking, controlling lost circulation and increasing lubricity. Due to its particle size characteristics, C‐SEAL F pills can be incorporated into the entire system for a total concentration of 10 to 20 lb/bbl (29 to 58 kg/m3). C‐SEAL F blend can be used in the entire circulating system in combination with coarser graphite/industrial carbon‐type materials as well as finer grinds of barite for fracture sealing.
The recommended treatment for partial losses (20 to 50 bbl/hr) is 20 to 50 lb/bbl (57 to 143 kg/m3) in spotted pills. C‐SEAL F blend can be used in combination with other lost circulation materials to control partial‐to‐severe losses. Very high‐permeability formations such as fractured carbonates and conglomerate zones may require additional spots in conjunction with a variety of lost circulation materials of varied particle size distribution.
C-SEAL F also may reduce torque and drag when it is incorporated into the active mud system.
Advantages
- Effective bridging and sealing agent for a wide range of formations and severity of losses
- Economical benefit – can be used in the whole circulating system without being removed by the shakers
- Reduces the possibility of differential sticking by controlling seepage losses
- Reduces torque and drag in all mud systems by increasing the lubricity
- Inert material with no adverse effects on mud rheology; compatible with all mud systems
- One‐sack product with no other additive requirements; easily mixed and dispersed into the system
- Temperature stable to >500°F (260°C)
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