Patent ID: 9145758
Filing Date: 2015-09-29
Classification: E21B

Abstract:
1. An apparatus of restricting fluid flow through a well conduit, the apparatus comprising: a tubular member comprising an inner wall surface defining a longitudinal bore; a seat housing having an inner wall surface and an outer wall surface, a majority of the outer wall surface disposed in the longitudinal bore, the seat housing comprising a seat housing bore and a seat bypass channel; and a seal placed radially between the tubular member and the seat housing to inhibit leakage therebetween; a seat sleeve slidingly disposed within the seat housing bore, the seat sleeve comprising a first position, a second position, a seat for receiving a plug element to restrict fluid flow through an opening in the seat, an initial fluid flow area, a seat bypass channel fluid flow area, and an operational fluid flow area, wherein the initial fluid flow area is defined by the seat sleeve being in the first position without the plug element landed on the seat, and the seat bypass channel fluid flow area is defined by the seat sleeve being in the first position with the plug element landed on the seat, wherein landing the plug element on the seat causes the seat sleeve to move from the first position toward the second position causing restriction of fluid flow through the seat bypass channel thereby defining the operational fluid flow area, and wherein the initial fluid flow area is greater than the opening in the seat.