Decommissioning and abandonment

Acronyms and Abbreviations

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CPT CPTU CRA CRT CSA CSO CSt CT CTE CTL CSOL CTOD

Cone penetrometer test

CPT with undrained pore pressure measurement (also known as PCPT)

Corrosion resistant alloy Cathode ray tube Cross-sectional area Coflexip Stena Offshore

Coflexip Stena Offshore Limited Centistokes (1 cSt = 1 x 10 -6 m²/s)

Computed tomography

Coal tar enamel Cut to length

Crack tip opening displacement

CTR

Cost time resource

CVAR

Compliant vertical access riser

CVI

Close visual inspection

C/WO

Completion/work-over (well development)

D/t DA

Diameter to wall thickness (ratio)

Double armour (cable)

DAF

Dynamic amplification Factor

DC

Direct current

DCVG

Direct current voltage gradient

DD

Directional drilling

DDCV DGPS

Deep draught caisson vessel

Differential global positioning system (see GPS)

DHL

Dynamic hook load (lifting) Dual head scanning sonar

DHSS

dia, diam.

Diameter

DIN

Deutsches Institut für Normung e.V. (German standards) Diverless maintained cluster (connection system)

DMaC

DnV DoF

Det Norske Veritas Degree of freedom

DOI MMS

Department of Industries Mineral Management Services (USA)

DP DPI DPT DRA DSV DTI DTL DVL DWP DWT DSAW

Dynamic positioning (for vessels) Dye penetrant inspection

Dye penetrant testing Drag reduction agent

Double submerged arc welding

Diver support vessel

Department of Trade and Industry Dynamic tensioner limit Doppler velocity log Design working pressure Dead weight tonnage Young’s modulus of elasticity East Easting Engineering criticality assessment

E

ECA ECL

ELF communication link

ECDIS

Electronic chart display information system