Rolf Bracke GZB – International Geothermal Centre, Bochum, Germany Innovations in Drilling Technologies IEA Geothermal Central and South American Workshop on Geothermal Energy Opportunities and Benefits of Geothermal Direct Use and Innovations in Geothermal Energy Cuernavaca, Morelos, Mexico, 18 & 19 April 2016
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Rolf Bracke GZB – International Geothermal Centre, Bochum, Germany
Innovations in Drilling Technologies IEA Geothermal Central and South American Workshop on Geothermal Energy Opportunities and Benefits of Geothermal Direct Use and Innovations in Geothermal Energy Cuernavaca, Morelos, Mexico, 18 & 19 April 2016
Main areas of drilling technologies are currently being investigated
Percussion DTH hammer drilling
Water Jet drilling
Coiled Tubing drilling
Thermal drilling technologies
Advanced Drilling Technology Research at GZB
Four main areas of drilling technologies are currently being investigated :
Percussion DTH hammer drilling, based on water and especially drill mud including full recirculation of the drilling fluids
Water Jet drilling, based on high pressure liquids / slurries, with /-out abrasives
Coiled Tubing drilling applications, here especially micro hole drilling based on engineered composites, percussion DTH tooling and (abrasive) jetting including directional drilling
Thermal drilling technologies to introduce the new paradigm of drilling Laser supported drilling being the main topic, Plasma drilling techniques are under investigation and evaluation as well as so called Spallation drilling
Advanced Drilling @ GZB
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• hydraulic DTH mud hammer • direct working - with elastomeric recovery • flow through system • possibly dual fluid system
• low differential pressure << 100 bar • adequately high flow rate • high impact energie • low number of moving parts • adjustable frequency
DTH Mud Hammer at GZB in development Coiled Tubing compatible for hard rock
> 160 kW hydraulic power
250 kW Diesel engine @ max. 2.100 RPM
pressure and flow regimes 100 – 1.500 bar up to 8 ½ inch hole size
standard 20 ft ISO container: - pump + engine - 5 m³ water storage tank - various pump heads + tooling
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DTH water hammer drilling + testing: „GeoStar-Project“
expandable shallow geothermal plant very small drilling pad only small surface area required to
install many borehole heat exchangers Accurate, „directional“ drilling with
DTH water hammer
Recirculation and conditioning of drilling fluids for deep drilling with DTH mud hammer systems
complete lamella type
cleaner system
overview recirculation system for
hydraulic DTH water / mud
hammer drilling system
reycling unit with desander desilter,
shaker type cleaner system
sedimentation and mixing
tanks
centrifuge unit if needed for finest
particles
Seismic while drilling data for reservoir and drilling prediction
use of DTH mud hammer high rate of penetration excellent seismic data for
geology analysis and prediction
little borehole deviation & high quality
Full circulation of drilling fluid possible
DTH Seismic while Drilling (cooperation project with OGS / Trieste, Italy)
DTH water hammer makes for very fast drilling and excellent seismic noise source
INTERNATIONALES GEOTHERMIEZENTRUMINTERNATIONAL GEOTHERMAL CENTER
BO.REX Bochum Research & Exploration Drilling Rig 40+20t pull capacity
Four main areas of drilling technologies are currently being investigated :
Percussion DTH hammer drilling, based on water and especially drill mud including full recirculation of the drilling fluids
Water Jet drilling, based on high pressure liquids / slurries, with /-out abrasives
Coiled Tubing drilling applications, here especially micro hole drilling based on engineered composites, percussion DTH tooling and (abrasive) jetting including directional drilling
Thermal drilling technologies to introduce the new paradigm of drilling after the tricone bit had been invented well over 100 years ago Laser supported drilling being the main topic, Plasma drilling techniques are under investigation and evaluation as well as so called Spallation drilling
Advanced Drilling @ GZB
INTERNATIONALES GEOTHERMIEZENTRUMINTERNATIONAL GEOTHERMAL CENTER
Technical options 100 bar 200 bar 800 bar 1.600 bar 1.600 bar abrasive Flow < 2.000 L/min
High pressure water triplex plunger + piston pumps up to 460 kW
GeoJetting Drilling for shallow geothermal systems
Drilling with high- pressure water 800 bar + 100 l/min → ≈ 130 kW hydr. Power
Drilling with high pressure water technique + abrasives 1.500 bar @ 80 l/ min for hard rock geologies Introduction of silicates into the jetstream as working agent @600m/s
The way ahead: Abrasive water jet drilling
Four main areas of drilling technologies are currently being investigated :
Percussion DTH hammer drilling, based on water and especially drill mud including full recirculation of the drilling fluids
Water Jet drilling, based on high pressure liquids / slurries, with /-out abrasives
Coiled Tubing drilling applications, here especially micro hole drilling based on engineered composites, percussion DTH tooling and (abrasive) jetting including directional drilling
Thermal drilling technologies to introduce the new paradigm of drilling after the tricone bit had been invented well over 100 years ago Laser supported drilling being the main topic, Plasma drilling techniques are under investigation and evaluation as well as so called Spallation drilling
Advanced Drilling @ GZB
Coiled Tubing Drilling Evolution • interdisciplinary GZB students project • managed & run mostly by students from
HSBO / RUB / RWTH / TUC / WH / HSOWL
Coil : very light weight but high collapse / burst rating as tubular is composite / fiber reinforced material
excellent spoolability due to high ductility of the Composite materials, no micro cracking issues
Long service life due to enhanced mechanical properties and excellent fatigue life
exact design of composite coil possible based on work load requirements e.g. DTH hammer drilling etc.
• More flexibility larger Ø possible • > 75 % lighter weight in air over steel • excellent spoolability • “earth worm” principle possible • fatigue resistant: >18.000 cycles
without failure • Chemically resistant • low inner surface roughness: less
Novel Productivity Enhancement Concept for a Sustainable Utilization of a Geothermal Resource - SURE H2020-LCE-2014-2015 / subcall LCE-2015-1
Helmholtz Zentrum Potsdam Deutsches GeoForschungsZentrum GFZ Germany Technische Universiteit Delft (TUD) The Netherlands International Geothermal Centre (GZB) Germany Íslenskar Orkurannsóknir (ISOR) Iceland Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek – TNO The Netherlands Well Services b.v. (WS) The Netherlands Imperial College of Science, Technology and Medicine (ICL) United Kingdom Geoterma UAB Lithuania Gamtos tyrimu centras (GTC) Lithuania
Future Research Plan: µ CT-Exploration • depth max. 500 meters • 5 ton injector • Exploration • Temp. Gradient drilling • Mining operations • Special drilling jobs /
foundation works
(Fotos: CSIRO)
Future Research Plan: µ CT-Exploration • depth max. 500 meters • 5 ton injector • Exploration • Temp. Gradient drilling • Mining operations • Special drilling jobs /
foundation works
ECOS-Loop
Gaschromatograph
Online-Detector
Gas-Trap
Conventional MIP-Application
ECOS- online-Application
Data Acquisition
PID/FID
SUGAR
Submarine Gashydrate Reservoir to produce Methane out of Gas Hydrates Exploration - Production – Transport
Financial Support:
mobile SCTDU
Composite Hybrid Riser
Production System
SUGAR B3: Gas Hydrate Production Drilling with Coiled Tubing: Subsea CT Drilling Unit (SCTDU) with surface vessel (of opportunity)
Four main areas of drilling technologies are currently being investigated :
Percussion DTH hammer drilling, based on water and especially drill mud including full recirculation of the drilling fluids
Water Jet drilling, based on high pressure liquids / slurries, with /-out abrasives
Coiled Tubing drilling applications, here especially micro hole drilling based on engineered composites, percussion DTH tooling and (abrasive) jetting including directional drilling
Thermal drilling technologies to introduce the new paradigm of drilling Laser supported drilling being the main topic, Plasma drilling techniques are under investigation and evaluation as well