دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a worker on a drilling or workover rig, subordinate to the driller, whose primary work station is on the rig floor. On rotary drilling rigs, there are at least two and usually three or more rotary helpers on each crew. Sometimes called floorhand, floorrnan, rig crewman, or roughneck.

n: in the case of an oil and gas lease, a supplementary agreement that resolves the priority of rights to the leased property and subordinates an earlier instrument (for example, a mortgage) to the oil and gas lease.

underbalance operations.

IADC-UBO term. Performance enhancement only;no zones containing hydrocarbons.

IADC-UBO term. Well incapable of flow to surface.

IADC-UBO term. Well capable of natural flow to surface, but conventional well kill methods are enabled, and limited consequences are possible in case of catastrophic equipment failure.

IADC-UBO term. Geothermal and non-hydrocarbon production. Maximum shut-in pressures are less than UBD equipments operating pressure rating. Catastrophic failure has immediate, serious consequences.

IADC-UBO term. Hydrocarbon production. Maximum shut-in pressures are less than UBD equipments operating pressure rating. Catastrophic failure has immediate, serious consequences.

IADC-UBO term. Maximum projected surface pressures exceed UBO equipments operating pressure rating, but are below BOP stack rating. Catastrophic failure has immediate, serious consequences.