Geothermal Drilling Cost Estimate
financiaLly plan your geothermal drilling projects
You can estimate the cost of drilling based on your own fuel cost, maintanace cost, operation cost and capital cost. This will help you to financialy plan your geothermal drilling projects and predict if you investment will be a prosperous one.
| Surface Drilling Cost Estimate STEP 1 |
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| Production Information: | |
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| Rock Strength (MPa) | 145 | 10 | 1 |
| Hole Dept (ft) | 500 | |
250 |
| Availability | 93% | |
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| Utilization | 95% | |
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| Drilling Factor | 90% | |
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| Gross Penetration Rate (ft/hr) | 120 | |
250 |
| Net Production Rate (ft/hr) | |
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| Fuel Cost: | |||
| Estimated Rig Operation Fuel Consumption (L/hr) | 5.2 | 5.2 | 5.2 |
| Estimated Compressor Fuel Consumption (L/hr) | |||
| Fuel Cost ($/l) | |||
| Cost x hr. | |
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| Operation Costs: | |||
| Operator Cost x hr. | |||
| Helper Cost x hr. | |||
| Cost x hr. | |
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| Maintenance Costs: | |||
| Labour Cost x hr. | |||
| Parts Cost x hr. | 17.75$ | |
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| Cost x hr. | |
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| Consumable Cost: | |||
| Estimated DTH Bit Life ft. | 1200 | 3600 | n/a |
| Estimated Tricone Bit Life ft. | 60000 | ||
| Estimated DTH Hammer Life ft. | 12000 | 18000 | n/a |
| Estimated Drill Pipe Life ft. | 80000 | 90000 | 110000 |
| Drill Tube 3½" x 10 feet | |||
| Bit 4¾" | |||
| Tricone Bit 5" | |||
| DTH Hammer 4" | |||
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| Bit Cost ( x foot) | |
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| DTH Hammer Cost ( x foot) | |
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n/a |
| Drill Steel Cost ( x foot) | |
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| Cost x foot | |
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| Cost x hr. | |
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| Captial Cost: | |||
| Rig Purchase Price (Estimate) | |||
| Compressor Purchase Price (Estimate) | n/a | ||
| Depriciation Period (years) | |||
| Weeks Per Year | |||
| Days Per Weeks | |||
| Scheduled Hours per Day | |||
| Scheduled Hours per Day | |
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| Residual @ Depriciation Period | |
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| Annual Interest Rate | |||
| Annual depreciation | |
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| Cost x hr. | |
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| Surface Drilling Cost Estimate STEP 2 |
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| Geo Track 635 | ||||
| Compressor | 350psi | 350psi | ||
| Mud Pump | 500 psi | |||
| Formation | Granite | Limestone | Sand, Silt, Clay, | |
| Shale | Soft Limestone | |||
| Calculation: cost per hour (Operating cost) * | Hole size- 4¾" | Hole size- 4¾" | Hole size- 5" | |
| Fuel Cost | $/hr | |
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| Operator and Helper Cost | $/hr | |
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| Maintenance Cost | $/hr | |
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| Consumable Cost | $/hr | |
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| Capital Cost | $/hr | |
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| Operating Cost | Total $/hr | |
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| Calculation: cost per foot (Production cost) ** | ||||
| Net Production Estimate / Operating rate | ft/hr | |
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| Fuel Cost | $/ft | |
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| Operator and Helper Cost | $/ft | |
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| Maintenance Cost | $/ft | |
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| Consumable Cost | $/ft | |
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| Capital Cost | $/ft | |
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| Production Cost | Total $/ft | |
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| Surface Drilling Cost Estimate STEP 3 |
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| Drill Pattern Information | |||
| Hole Dept (ft) | 500 | |
250 |
| Sub Drill (ft) | 0 | |
0 |
| Hole Size (inch) | 4¾ | |
5 |
| Geological Information | |||
| Rock Strength (MPa) | |
10 | 1 |
| Silica Content (%) | 40% | 10% | 0% |
| Rock Density (tons/yd3) | 2.7 | 1.7 | 1.2 |
| Production Information | |||
| Availability | |
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| Utilization | |
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| Drill Factor | |
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| Hours per Year | |
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| Hours per day | 10 | |
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| Gross Production Rate (ft/hr) | |
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| Net Production Rate (ft/hr) | |
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| Distance drilled per hole | |
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| Drilling time per hole (hrs/hole) | |
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| Number of holes ( x day) | |
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| The following estimate is intended for comparitive purposes only. This estimate applies only to the equipment listed herein and is based on the best information available at the time of completion. Due to the complexity of the factors involved in performing a drill cost estimate, this document should be treated as an estimate only. Use for budgetary purposes or other financial estimations are done at the user's own risk. | |||