Corrosion/scaling monitoring & measurements and preventing
Measurements
- Coupon holder placed at well head under isokinetic conditions
- Corrosion assessments by means of differential weighing
- Integration of corrosion kinetics over 1 to 3 months durations
GPC IP corrosion coupon holder
- Instant measurement of corrosion, rate and pitting ratio, by polarizing resistance methods
Corrosion rate recording
- On site ultrasonic pipe wall thickness measurements
Pipe wall thickness control (ultrasonic)
Inhibitive treatment
- Down hole chemical injection via Auxiliary Injection Tubing (AIT GPC).
- Chemical injection controled by geothermal flowrate, safety minimum threshold injection rate
- Safety back pressure achieved by HP vessel
Site Installation
Monitoring
- Site specific inhibitor optimization (formulation and concentrations)
- Joint research programmes on efficiency assesments of candidate inhibitor agents (IFP/GPC IP in 1993, ADEME project/SOCACHAL/GPC IP in 1996)
- Combined, binary oriented (filming/biocide) formulations
- Short to medium term biocide treatments
Monitoring of sulphide and iron concentrations