Patent ID: 11927067
Assignee: BAKER HUGHES OILFIELD OPERATIONS LLC
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 7:
8. A downhole device, comprising:
an outer sleeve of a plug, the outer sleeve defining a bore therethrough, the outer sleeve including a key slot therein and a key disposed in the key slot;
an inner sleeve defining a flow passage and including a recess on its outer surface, the inner sleeve disposed at a first position within the bore in a locked configuration of the plug with respect to the outer sleeve and axially movable with respect to the outer sleeve between the first position and a second position of the outer sleeve to place the plug in an unlocked configuration; and
a seat member in the flow passage for seating a ball when the inner sleeve is at the first position and wherein a fluid pressure on the ball moves the inner sleeve from the first position to the second position, moves the seat member radially outward out of the flow passage when the inner sleeve is at the second position, and pushes the ball out of the flow passage, wherein the key slot is axially aligned with the recess when the inner sleeve is at an intermediate position between the first position and the second position to allow the key to collapse into the recess.