G-STOP (Poly-LCM) is a polymer that will expand 300 times its volume in fresh water (50 times in salt water). This remarkable property makes it an excellent medium for plugging fissures and cracks encountered in drilling operations.
Chemical name or Synonym: Sodium polyacrylate based super absorbent polymer, PolySWELL, Aquaswell, PolyLCM, Lost circulation material
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G-STOP (Poly-LCM) is a polymer that will expand 300 times its volume in fresh water (50 times in salt water). This remarkable property makes it an excellent medium for plugging fissures and cracks encountered in drilling operations.
Equivalent to AUSPLUG, LC-STOP, Polyswell.
Type: | Hydrophilic polymer |
Enlargement: | 300 times its volume in fresh water |
Granule density: | 0.5 |
Appearance: | white granules available |
Specific density: | 1.5 |
Required time: | 30 minutes for 50% enlargement |
90 minutes for 100% enlargement | |
Resists: | Alcohol, bases and acids Not biodegradable |
Viscosity: | The water viscosity is not changed initially |
Application:
Mix the G-STOP directly in the tank with 200 times its volume water. Wait 10 minutes. Inject the mixture into the drill string. Inject a volume of water to move mixture to the correct location. Wait 20 minutes. Drill. If the fissure is large, repeat procedure.
Alternate method:
Place 1 gallon of dry Polyseal in a 20 litre pail with 10 liters of water. Allow G-STOP to partially swell. Add 1 litre of partially swollen G-STOP to the rods after the core tube has been pulled. Pump down hole and replace inner tube. Repeat as necessary to stop loss.
Packaging:
Plastic 20kg / 25 kg paper bag or 15kg / 20kg pails
Safety：
Avoid contacting with eyes, skin and clothing. Otherwise, wash with a flush of water. Refer to Material Safety Data Sheet (MSDS) for complete handling and hazard data
