Borehole Stabilizing Dry Polymer

Description

POLY-BORE is a free flowing, water-soluble, easy mixing, 100% dry granular polymer. POLY-BORE is a very high molecular weight partially hydrolyzed polyacrylamide (PHPA) polymer. When mixed with fresh water, a small quantity of POLY-BORE provides a clear, solid-free, viscous borehole stabilizing fluid for use in drilled shaft, auger drilling, horizontal directional boring, trenching excavation and reverse circulation (RC) rotary drilling. POLY-BORE is not designed to be used in conjunction with bentonite based fluids.

Applications/Functions

• Provide a clay-free boring fluid
• Stabilize reactive clay and shale formations
• Enhance core recovery in continuous wireline coring operations
• Provide high cohesiveness to bind excavated sandy soil and gravel
• Facilitate the removal of drilled spoils from augers and increase excavation rate
• Maximize load transfer for drilled shaft application

Advantages

• Disperses easily with minimal shear
• Efficient shale/clay stabilizer and viscosifier
• Does not require solids control unit to clean the slurry
• Promotes stable and gage borehole
• Results in maximum skin friction and ultimate end bearing capacity for a drilled shaft
• Non-fermenting
• No petroleum distillates involved
• Breaks down chemically with bleach (sodium hypochlorite)
• NSF/ANSI Standard 60 certified

Recommended Treatment

Drilling

• Add 0.5 to 1 pound of POLY-BORE dry polymer per 100 gallons of fresh water (0.6 - 1.2 kg/m3 ) slowly through the hopper. (See Mix Instructions below)

Mix Instructions

• 15 to 20 minutes to allow POLY-BORE to hydrate
• Measure the funnel viscosity of the polymer slurry and adjust according to required specifications

Notes:

• Water pH between 8.5 – 9.5
• Reduce total hardness of make-up water by adding soda ash (sodium carbonate) at 0.5 to 1 pound per 100 gallons (0.6 - 1.2 kg/m3) of make-up water.