Cork: a hydrologic seal and downhole observatory for deep-ocean boreholes

E. E. Davis, K. Becker, T. Pettigrew, B. Carson, R. Macdonald

Research output: Contribution to journalArticlepeer-review

87 Scopus citations


A new tool has been developed and successfully deployed that provides a means by which cased reentry holes drilled by the Ocean Drilling Program can be hydrologically sealed and instrumented. The instrumentation was designed to monitor the formation temperatures and pressures for up to 2 years during and following the recovery from drilling disturbances. Two units were deployed in the sediment-filled Middle Valley rift of the northern Juan de Fuca Ridge, in Hole 857D and Hole 858G. Data were recovered successfully three weeks after deployment. The instruments will continue to monitor formation pressures and temperatures once per hour for 2 years. -from Authors

Original languageEnglish (US)
Pages (from-to)43-53
Number of pages11
JournalUnknown Journal
StatePublished - 1992
Externally publishedYes

ASJC Scopus subject areas

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)


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