Handbook of Best Practices for Geothermal Drilling

Report, Sandia; Finger, J.T.; Blankenship, Doug

doi:10.2172/1325261

Cited by 47 publications

(39 citation statements)

References 46 publications

(26 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…While in case of float collar it contains a valve which helps the casing to float into the well to lessen the hoisting system load. The float collar also acts as check valve that keeps drilling fluids from entering through bottom of the casing (Finger and Blankenship, 2010). The centralizers and scratchers are placed on the exterior part of the casing.…”

Section: Placement Of Casing:-mentioning

confidence: 99%

“…This plug is solid, so when there is a sharp rise in displacement fluid pressure the pumps are stopped. When the cementing process is complete, a waiting period (typically 12-24 hours) is necessary to allow the cement to set (Finger and Blankenship, 2010;Aboholi, 2013). If additional drilling is necessary, such as for the next lower hole, the drill bit is capable of drilling through the wiper plugs and any cement at the bottom of the casing.…”

Section: Placement Of Casing:-mentioning

confidence: 99%

See 1 more Smart Citation

Review of Deep Drilling Techniques for High Enthalpy Geothermal Reservoirs.

Yadav¹,

Sircar²

2017

IJAR

View full text Add to dashboard Cite

Section: Placement Of Casing:-mentioning

confidence: 99%

Section: Placement Of Casing:-mentioning

confidence: 99%

Review of Deep Drilling Techniques for High Enthalpy Geothermal Reservoirs.

Yadav¹,

Sircar²

2017

IJAR

View full text Add to dashboard Cite

“…This is partly because geothermal drilling is but one small part of global drilling market that remains dominated by the hydrocarbon sector, in which the high market value of the commodity sought has tended to lessen pressures to reduce drilling costs. Furthermore, the high temperatures and pressures encountered in geothermal wells that intercept high-enthalpy reservoirs considerable exceed those encountered in hydrocarbon wells, so that very particular challenges arise in relation to mechanical processes and the performance of engineering materials [52]. For instance, drill-bits commonly used to achieve rapid rates of penetration in deep hydrocarbon wells (such as polycrystalline diamond compact bits rotated by rotor/stator devices actuated by drill mud, and conventional air-or water-actuated down-the-hole-hammer (DTTH) devices) will not function where high losses of drilling fluid occur to the strata (which is common in buried volcanic rock sequences containing lava tubes), nor where temperatures exceed the stability range of the elastomers used in the rotating or reciprocating components.…”

Section: Gaps Analysis Of Geothermal Innovation: Towards a Whole-systmentioning

confidence: 99%

Geothermal Energy: Delivering on the Global Potential

2015

View full text Add to dashboard Cite

Geothermal energy has been harnessed for recreational uses for millennia, but only for electricity generation for a little over a century. Although geothermal is unique amongst renewables for its baseload and renewable heat provision capabilities, uptake continues to lag far behind that of solar and wind. This is mainly attributable to (i) uncertainties over resource availability in poorly-explored reservoirs and (ii) the concentration of full-lifetime costs into early-stage capital expenditure (capex). Recent advances in reservoir characterization techniques are beginning to narrow the bounds of exploration uncertainty, both by improving estimates of reservoir geometry and properties, and by providing pre-drilling estimates of temperature at depth. Advances in drilling technologies and management have potential to significantly lower initial capex, while operating expenditure is being further reduced by more effective reservoir management-supported by robust models-and increasingly efficient energy conversion systems (flash, binary and combined-heat-and-power). Advances in characterization and modelling are also improving management of shallow low-enthalpy resources that can only be exploited using heat-pump technology. Taken together with increased public appreciation of the benefits of geothermal, the technology is finally ready to take its place as a mainstream renewable technology, exploited far beyond its traditional confines in the world's volcanic regions.

show abstract

“…Finger & Blankenship 2010), and applying the decades of geomechanical learning from total extraction mining beneath aquifers and the sea-bed to ensure that fractures induced by void collapse do not connect hydraulically to freshwater bodies near the surface (see Orchard 1975;Garritty 1982). On this basis, Younger (2011) developed guidance on environmental (largely hydrogeological) risk assessment for UCG projects, and for projects in which the porosity produced by UCG is subsequently utilized as a long-term storage zone for CO 2 .…”

Section: Underground Coal Gasificationmentioning

confidence: 99%

Hydrogeological challenges in a low-carbon economy

Younger

2013

QJEGH

View full text Add to dashboard Cite

Hydrogeology has traditionally been regarded as the province of the water industry, but it is increasingly finding novel applications in the energy sector. Hydrogeology has a longstanding role in geothermal energy exploration and management. Although aquifer management methods can be directly applied to most high-enthalpy geothermal reservoirs, hydrogeochemical inference techniques differ somewhat owing to peculiarities of high-temperature processes. Hydrogeological involvement in the development of ground-coupled heating and cooling systems using heat pumps has led to the emergence of the sub-discipline now known as thermogeology. The patterns of groundwater flow and heat transport are closely analogous and can thus be analysed using very similar techniques. Without resort to heat pumps, groundwater is increasingly being pumped to provide cooling for large buildings; the renewability of such systems relies on accurate prediction and management of thermal breakthrough from reinjection to production boreholes. Hydrogeological analysis can contribute to quantification of accidental carbon emissions arising from disturbance of groundwater-fed peatland ecosystems during wind farm construction. Beyond renewables, key applications of hydrogeology are to be found in the nuclear sector, and in the sunrise industries of unconventional gas and carbon capture and storage, with high temperatures attained during underground coal gasification requiring geothermal technology transfer.

show abstract

Handbook of Best Practices for Geothermal Drilling

Cited by 47 publications

References 46 publications

Review of Deep Drilling Techniques for High Enthalpy Geothermal Reservoirs.

Review of Deep Drilling Techniques for High Enthalpy Geothermal Reservoirs.

Geothermal Energy: Delivering on the Global Potential

Hydrogeological challenges in a low-carbon economy

Contact Info

Product

Resources

About