WHY CHOOSE CLEAR-BORE FOR BORED PILES AND DIAPHRAGM WALLS
Superior Rheology: The rheological (flow properties) characteristics of Clear-Bore have been proven in both the laboratory and job site as providing better-drilled cutting removal from the bore hole than the types of Civil Engineering Grade Bentonite typically used in Foundation operations. This ensures that a clean bore hole is maintained, preventing drilled solids contaminating the concrete whilst it is poured.
High Gel Strength: The gel strength (cuttings suspension capacity) of Clear-Bore slurry is greater than that of most Bentonite based drilling fluids - you do not need to add expensive additions of Xanthan Gum to increase the gel strength. The Gel Strengths are not progressive so there is less chance of cement channeling or fluid loss occurring whilst the concrete is tremmied into the bore hole.
Excellent Fluid Loss Control: Clear-Bore provides a tight thin filter cake which provides excellent bore hole stability. Clear-Bore polymers are unique in their ability to actually bind drilled cuttings together to provide an even tighter filter cake than bentonite based drilling fluids - generally no additional fluid loss additives are required.
Ultra High Yield: With a typical dose rate of only 2.5-5kgs of Clear-Bore per 1000liters (m3) of water. One 5kg bag of Clear-Bore yields the equivalent volume of drilling fluid to that of 70-120Kgs of standard drilling grade bentonite. In effect 1 metric tonne of Clear-Bore yields at least 200 cubic meters of mixed drilling fluid whilst 1 metric tonne of CE grade bentonite only yields 10-15 cubic meters of drilling fluid.
The Product is UNIVERSAL - i.e. one-sack-does-all. Whether you are drilling through sand, rock, gravels or boulder clay etc, no additional polymers or products are needed. Very little technical support is required if you have the correct concentration. Clear-Bore exhibits excellent shale and clay inhibitition as well as "anti-bit-balling" properties making it ideal for drilling sticky clays as well as sands and gravels.
Salt Water Tolerant: Clear-Bore will mix in both salt water and fresh water and can be used to drill below the water table through difficult salt-water contaminated formations.
Non-toxic and Completely Biodegradable: Clear-Bore is ideal for environmentally sensitive sites (EPA tested).
Dramatically Reduces Drilling Fluids Disposal Costs: By adding of a small dose of Calcium Hypochlorite to a full pit or tanker full of used Clear-Bore slurry it will break down overnight to approximately 20-30% semi-solid material and 70-80% water. Thus disposal costs are dramatically reduced by up to 90%.
Zero Percent Sand Content: Clear-Bore does not contain any minerals so it does not contain any grit (bentonite typically contains 0.5 - 4.0% grit). Clear-Bore fluid is proven to reduce mud pump wear and reduce associated operating costs.
Versatile: Clear-Bore is fully compatible with bentonite slurry. Added to hydrated bentonite slurry Clear-Bore provides an extremely cost effective one-bag additive for increasing the Gel strength and fluid loss control characteristics of bentonite whilst also creating clay and shale inhibition.
Reduced Storage, Transport and Handling Costs: Because of the small volumes required (one tenth of that of bentonite) there are reductions in storage and transport costs as well as manual handling benefits. The ease of use is perfect for operators.
Easy Mixing with Reduced Down Time: Unlike most drilling fluids Clear-Bore mixes quickly and easily through a standard venturie hopper, typically reaching optimum drilling fluid properties within 10 - 15 minutes (civil engineering grade bentonite takes up to 12 hours to fully hydrate).
Recycles: unlike most polymer based drilling fluids Clear-Bore is easily recycled through standard recycling units.
Stable: For long and large diameter bores Clear Bore can be ordered with an added stabilizer which will increase its operating life from 3 - 4 weeks to well over 3 months.
Quantifiable: The rheological and fluid loss control properties of Clear-Bore can be measured and tested using standard drilling fluid test apparatus.
Skin Friction: The Clear Bore filter cake is destroyed by the cement as it is tremied into the bore hole. This ensures a tighter cement/formation bond than that which is typically seen with bentonite based drilling fluids.
The statements and recommendations made herein are believed to be accurate. No guarantee of their accuracy is made, however. Because the conditions of use of the information contained within this manual are beyond Drilling Supplies Europe Ltd's control, Drilling Supplies Europe Ltd do not accept any warranty either express or implied for the product CLEAR-BORE.
