1. n. [Drilling]

A set of high-pressure valves and associated piping that usually includes at least two adjustable chokes, arranged such that one adjustable choke may be isolated and taken out of service for repair and refurbishment while well flow is directed through the other one.

See: choke line

2. n. [Well Completions]

A manifold assembly incorporating chokes, valves, and pressure sensors used to provide control of flowback or treatment fluids.

See: treatment fluid