ENTI's drilling fluid technology is featured with its finedrilling fluid technology, with "One well, One Plan" technology concept, providing customers with targeted and optimized drilling fluid solutions. ENTI introduced and developed Evolution™ Drilling Fluid. The composition of Evolution™ Drilling Fluid is similar to water based drilling fluid, but it has the operation performance to oil-based drilling fluid. The most important of Evolution™ Drilling Fluid is to avoid oil-base drillingfluid's risk to the environment fundamentally. Evolution™ Drilling Fluid is the only realized commercialized water-based drilling fluid technology that replaces oil-basedrilling fluid in the field of unconventional oil and gas.
Technology series 1: the water-based drilling fluid PARDRILIN – F for sensitive reservoir
PARDRILIN-F is the water-based drilling fluid PARDRILIN-F for sensitive reservoir, not for oil-protected material added in the ordinary drilling fluid.
● Elements can be naturally degraded or acid soluble, no bentonite and asphalt
pollution sources etc.
● The specific design according to the reservoir geologic characteristics and different
well completion
● Temperature Resistance: 160℃
Technology Series 2: the water-based drilling fluid ENPAQUA-F (EVOLUTION) replacing oil-based drilling fluid
● ENPAQUA-F (EVOLUTION) is widely applied to large displacement horizontal well and
shale gas horizontal wells, such as the horizontal well operation with more than
2.2 g/cm3 density and 200 ℃ of a bottom hole
● Reduce environmental risk and the cost
● Friction coefficient is less than or close to oil-based drilling fluid
● Rejection capability is close to oil-based drilling fluid
Technology Series 3: No (organic) earth oil-based drilling fluid NOKLAY – FO
● The formula of no organic soil avoids the reservoir pollution risk of traditional
oil-based drilling fluid.
● The density can be dropped to 0.93 g/cm3, which is suitable for depleted reservoir.
● Circulating pressure loss and emotional stress are significantly lower than the
traditional oil-based drilling fluid, which avoid the risk of leakage, especially for the
operation of large displacement horizontal well.
● The ability to resist pollution (water, poor solid phase) is stronger than the traditional
oil-based drilling fluid. In addition, it has stronger adaptability for some adverse
conditions, such as the low efficiency of solids control and potentially high pressure
water.
● High thixotropism can avoid hole cleaning problem, such as the sediment of drilling
cuttings in the horizontal well.
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