Equipment for drilling and fracturing hot granite wells

Conference · Mon Jan 01 04:00:00 EST 1979 · Soc. Pet. Eng. AIME, Pap.; (United States)

OSTI ID:5875472

Brittenham, T L; Neudecker, J W; Rowley, J C; Williams, R E

Drilling and fracturing requirements for deep, deviated geothermal wells in very hot granite create several severe equipment problems. These problems result from the very high temperatures and extremely hard rock of the geothermal reservoir under development. Previous drilling of 2 wells to 10,000-ft (3 km) depths and 400 F (200 C) at the Fenton Hill hot-dry-rock (HDR) geothermal experimental site have defined these problems and directed efforts toward solutions. These solutions have required extensions of current drilling methods and development of new tools and hardware. This study describes the requirements for the hot hole tools, the new equipment, and status of tests of the tools that have been developed for drilling and open-hole fracturing operations for use in 14,500-ft (4.4 km) deep, 527 F (275 C) bottom-hole temperature wells. The relationships and potential applications of these drilling equipment advances to drilling of natural (hydrothermal) geothermal reservoirs are presented. 17 references.

• OSTI ID: 5875472
• Report Number(s): CONF-790913-
• Conference Information: Journal Name: Soc. Pet. Eng. AIME, Pap.; (United States) Journal Volume: SPE-8268
• Country of Publication: United States
• Language: English

Related Subjects

15 GEOTHERMAL ENERGY
150904 -- Geothermal Engineering-- Geothermal Reservoir & Well Performance
150906* -- Geothermal Engineering-- Reservoir Stimulation & Extraction Technology
COMMINUTION
DEPTH
DIMENSIONS
DRILLING
DRILLING EQUIPMENT
ENERGY SYSTEMS
EQUIPMENT
FRACTURING
GEOTHERMAL SYSTEMS
GEOTHERMAL WELLS
GRANITES
HIGH TEMPERATURE
HOT-DRY-ROCK SYSTEMS
HYDRAULIC FRACTURING
IGNEOUS ROCKS
OPERATION
PLUTONIC ROCKS
ROCKS
TESTING
WELL DRILLING
WELLS