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Oil & Gas

ROADBOND EN 1™ Advantages for Drilling Locations and Lease Roads

ROADBOND EN 1™ Is Used to Encapsulate Drill Cuttings

Reduce Carbon Footprint of Drilling Locations and Lease Roads

ROADBOND EN 1™ is a highly effective, proven soil stabilizer that tackles important challenges related to the construction of drilling locations and lease roads.  These challenges are to reduce the consumption of water and natural resources, conserve base material, lower maintenance cost, and to reduce the construction impact on local roads.

Given an example drilling location of 300’ by 450’, using ROADBOND EN 1™ instead of lime will offset over 420 tons of Greenhouse Gas and heavy metal pollutants released into the air, and conserve the equivalent of 840,000 kWh of energy.  That is enough energy to power over 70 homes for a year.  And that’s just one location!

ROADBOND EN 1™ offers four primary benefits:

  1. Encapsulate And Contain Heavy Metals And Total Petroleum Compounds (TPC’s) Present In Drill Cuttings
  2. Stabilize Clay Sub-Grade Soil
  3. Enhance Portland Cement And Other Pozzalon Material
  4. Improve The Strength Of Crushed Stone Base Materials

Lower Cost & Reduce Road Damage

Additional, the truck traffic that is generated in order to deliver the lime to the location is eliminated and that reduces the damage and maintenance to the local road network.  Over time, this can lessen the production cost in the area.

Less Repair & Maintenance

Another gain is that the damage to the location that occurs during the drilling phase is significantly reduced.  Therefore, the site rework and maintenance before fracking and completion is reduced or eliminated completely.

 

After a soaking rain, the improvement in the treated base material compared to the untreated section is dramatic.

Tindol Construction – Field report on strength of drilled cores stabilized w Roadbond EN 1 & Portland cement

EAGLE FORD EVALUATION

Field evaluations were conducted in the Eagle Ford formation south of San Antonio, TX.  One location was stabilized with 8% Portland cement.  A nearby location was stabilized with ROADBOND EN 1™ and 4% Portland cement.  This reduced the cost and offset over 225 tons of greenhouse gas.

Both location were tested for strength as shown in the chart below:

8% Cement Roadbond + 4% Untreated Location
Site 1 5 mm 2 mm 20 mm
Site 2 17 mm 7 mm 18 mm
Site 3 17 mm 13 mm 12 mm
Site 4 5 mm 3 mm 21 mm
Site 5 12 mm 11 mm 18 mm
Site 6 6 mm 16 mm 14 mm
Site 7 16 mm 9 mm 22 mm
Site 8 10 mm 3 mm 18 mm
Total 24 blows – 88 mm 24 blows – 64 mm 24 blows – 143 mm

CBR

68.1

97.3

39.6

8% Portland cement had an average CBR of 63.9.  ROADBOND EN 1™ and 4% Portland cement had an average CBR of 84.9.  That is a strength increase of 33%!

Over the next 2 months, 9 more locations were tested.  One of these locations was stabilized with 8% Portland cement.  The CBR of that location was 62.5

14 loads PC
Site 1 10 mm
Site 2 12 mm
Site 3 11 mm
Site 4 12 mm
Site 5 14 mm
Site 6 12 mm
Site 7 11 mm
Site 8  13 mm
Site 9 12 mm
Total 27 blows – 107 mm

CBR

62.5

Table 3.  Warthog Facility Location

The other 8 locations were stabilized with ROADBOND EN 1™ and 3% Portland cement.  The average CBR of these locations was 75.9.  That is an increase in strength of 21%.

Location CBR
Tarpon 1-H, 2-H 82.7
Lottie Lee B5-H 69.9
Franklin BI-BII 71.5
Franklin C1-H 97.3
Pudge 2-H 71.8
San Miguel D2-H 67.3
Naylon Jones 70-H 75.8
Jarrell 7-H 70.8

Average CBR

62.5

 

DRILL CUTTINGS

ROADBOND EN 1™ is combined with drill cuttings during the construction of locations and lease roads.  This reduces construction costs and redirects drill cuttings from a waste material to a useful construction material.  This benefit reduces the environmental impact of drilling operations.

The drill cuttings are spread 3” to 4” deep and mixed with the existing soil to a total depth of 10” to 12”.

The stabilized area is then topped with a 2” lift of suitable crushed stone base material.

Samples consisting of 40% drill cuttings and 60% native clay soil collected near Ardmore, OK were mixed together and then stabilized with ROADBOND EN 1™.  This treated mixture was then molded in cylinders for testing.

The molded samples along with the raw drill cuttings were delivered to a certified environmental testing facility for evaluation.  The samples were analyzed according to EPA method 6010C for heavy metals, EPA method 8260B for volatile organic compounds, EPA method 8270C for semi-volatile organic compounds, and by Texas method 1005 for total petroleum compounds.

Generally speaking, the treated cylinders were ground and pulverized so that 100% passed a ¼ inch sieve.  This pulverized material was then tested for heavy metals and petroleum hydrocarbons, and compared to the original raw cuttings.  Next, a quantity of a specific solution was passed over the pulverized sample and the distillate was tested for contaminates to determine the amount of leaching.  (TCLP)

Metal Total Metals mg/KG w ROADBOND EN 1 TCLP Metals mg/KG
Antimony 2.7 0.0044
Arsenic 4.9 0.006
Barium 2600 0.36
Beryllium 2.2 0.0003
Cadmium 0.04 0.0017
Chromium 23 0.2
Copper 220 0.009
Lead 4.8 0.0068
Manganese 870 0.38
Mercury 0.017 0.0053
Nickel 18 0.017
Selenium 0.35 0.0085
Silver 0.26 0.0017
Zinc 38 0.0068

As Table 1 illustrates, the heavy metals found in the treated soil mixture is much lower than the heavy metals contained in the raw cuttings, and the heavy metals found in the distillate is even lower still.  The heavy metal content found in the treated soil and the distillate is well below regulatory levels and demonstrates how effectively the heavy metals are encapsulated.

Petroleum Compound Raw Drill Cuttings Total mg/Kg w ROADBOND EN 1 40% Mixture Total mg/Kg w ROADBOND EN 1 40% Mixture TCLP mg/L
Benzene 5.9 0.23 0.00036
Ethyl benzene 16000 0.029 0.00029
Toluene 1400 0.4 0.0006
Xylenes 49000 0.26 0.001
TPH C6-C12 19000 1900 Non-detectable
TPH C12-C28 74000 20000 Non-detectable
TPH C28-C35 970 250 Non-detectable
TPH Total 94000 22000 Non-detectable

Table 2 references the results of the total petroleum hydrocarbons contained in the raw drill cuttings, the treated mixture, and distillate. In summary, the total petroleum hydrocarbons were reduced from 94,000 milligrams per kilogram in the raw cuttings to 22,000 milligrams per kilogram in the treated mixture, and were non-detectible in the distillate.

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