Patent ID: 11867019
Assignee: WEATHERFORD TECHNOLOGY HOLDINGS, LLC
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 4:
5. The assembly of claim 1, wherein:
the plug body comprises a bottom member and a top member, the bottom member having a passage therethrough, the passage having a closure closing the passage, the bottom member being deployable down the tubing ahead of the cement, the bottom member having the first portion of the plug body being configured to engage with the downhole seat of the insert, the closure of the bottom member being opened in response to an initial application of the applied pressure against the engaged bottom member, the top member being configured to engage with the passage of the bottom member and being configured to close fluid communication through the passage in the bottom member; and
the second portion of the plug body comprises a collar disposed on the bottom member and being configured to engage with the second seat in response to the movement of the insert from the first position, the collar engaged with the second seat being configured to at least restrict a subsequent application of the applied pressure through the flow bore, the collar being removable at least after the subsequent application, the bottom member upon removal of the collar being configured to release from the second seat.