Geothermal Wells - Health and Safety Guidelines for Shallow
These Guidelines set out the requirements for design and work practice necessary to ensure the safe drilling, operation, maintenance and abandonment of wells penetrating hot subsurface conditions to a depth of 150 metres, however where subsurface conditions are not expected to be severe, compliance with these Guidelines may be extended to those wells drilled to a depth not exceeding 250 metres.
These Guidelines apply particularly to the volcanic regions and geothermal industry of New Zealand, but are expected to be suitable for use in other countries.
Table of Contents
- Introduction
- Related Documents
- Foreword
- Part 1: General
- Scope
- Definitions
- Units of Measurement
- Nomenclature and Abbreviations
- Part 2: Well Design
- General
- Casing
- Wellhead Design
- Part 3: Well Sites
- General
- Site Selection
- Site Access
- Site Location
- Cellars
- Site Drainage
- Water Supply
- Well Site Security
- Part 4: Drilling Practices
- General
- Well Control
- Drilling Fluids
- Running Casing
- Cementing Casing
- Well Completion
- Wellhead Installations
- Record Keeping
- Equipment Maintenance
- Personnel Safety and Training
- Part 5: Operation and Maintenance of Wells
- General
- Self-Discharging Wells
- Closed or Bleeding Wells
- Well Maintainance At Surface
- Well Integrity
- Workovers
- Record Keeping
- Part 6: Disposal of Geothermal Waste
- General
- Reinjection Wells
- Part 7: Abandonment of Wells
- General
- Abandoment Criteria
- Well Assessment
- Abandonment Operations
- Maintenance of Temporarily Abandoned Wells
- Appendix: Pressure Ratings of ANSI Fittings
