Abstract: An oilwell choke can include a choke body having an inlet and an outlet, a seat, a gate configured to optionally sealingly engage the seat, and an at least partially curved choke profile. A gate can include an at least partially curved gate profile and a seat can include an at least partially curved seat profile. A choke profile can have one or more radiuses of curvature. At least a portion of a choke profile can be elliptical. An oilwell choke can include a secondary closure, which can include an annular tongue configured to sealingly engage an annular groove.