Safety Alert

H2S Alarm Activation

IADCInternational Association of Drilling ContractorsIADC Alert 21-04

H2S Alarm Activation

Read at IADCOpens the publisher’s page on iadc.org

Summary

An alert describes hydrogen sulphide detection at surface during drilling of a well’s casing shoe track, upon bottoms up. The previously cemented well had been suspended for 30 days, with untreated spacer fluid remaining inside the casing. Rig and mudlogging sensors near the shale shakers recorded 57 ppm and 43 ppm respectively.

Topics

About This Record
Publisher
International Association of Drilling Contractors
Type
Safety Alert
Reference
IADC Alert 21-04
Date
8 April 2021
Topic
Hydrogen Sulphide
Activity
Drilling
Equipment
Gas Detector
Sector
Upstream Oil and Gas
Link
Checked , working
Record
iadc-alert-21-04 · added 3 September 2026

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