Definition(s)
Dual Gradient Drilling
A drilling process that creates multiple pressure gradients to manage the annular pressure profile.
Source: ABS Guide for Classification and Certification of Managed Pressure Drilling Systems, September 2017. Global Standards
Dual Gradient Drilling
Drilling technology that uses or simulates the effect of two fluids of different gradients in the annulus to create dual hydrostatic gradients to better manage the annular pressure profile.
- NOTE: This technology is used to facilitate well construction through enhanced wellbore pressure management.
Source: API Specification 16Q, Design, Selection, Operation, and Maintenance of Marine Drilling Riser Systems, Second Edition, April 2017. Global Standards