Definition(s)
GRA
Guidelineless re-entry assembly.
Source: API SPEC 17D, Design and Operation of Subsea Production Systems—Subsea Wellhead and Tree Equipment, Upstream Segment, Second Edition May 2011 (Errata September 2011). Global Standards
GRA
Guidelineless re-entry assist.
Source: Deepwater Well Control Guidelines. IADC Guidelines