Mr. Erik Milito - The House Committee on Natural Resources ...

8 API STANDARD 65-2
3.1.40
non-aqueous fluid
NAF
Non-aqueous fluid is a non-aqueous drilling fluid or well circulating fluid. Common NAF systems are diesel, mineral
oil, or synthetic fluid based invert emulsions, or other non-water based fluids.
3.1.41
nippling down
<strong>The</strong> process of removing well-control or pressure-control equipment such as a BOP system.
3.1.42
nippling up
<strong>The</strong> process of installing well-control or pressure-control equipment such as a BOP system.
3.1.43
operator imposed casing pressure
Pressure in a casing that is operator imposed for purposes such as casing pressure integrity tests (prior to drilling out
the shoe), gas lift, fluid injection, stimulation treatments, thermal insulation, etc.
3.1.44
overbalance pressure
OBP
Overbalance pressure is the amount by which the hydrostatic pressure exceeds the pore pressure of a formation.
3.1.45
physical barrier element
Physical barrier elements can be classified as hydrostatic, mechanical or solidified chemical materials (usually
cement).
3.1.46
polished bore receptacle
PBR
A device with a honed internal diameter (ID) sealing surface for landing a production tubing seal assembly or tie back
casing.
3.1.47
pore pressure
PP
Pore pressure is the pressure of the fluid inside the pore spaces of a formation.
3.1.48
potential flow zone
Any zone in a well where flow is possible under when wellbore pressure is less than pore pressure.
3.1.49
production casing
Casing that is set through a productive interval.
3.1.50
production liner
A liner that is set through a productive interval.