Time Delay Toe Sleeve

摘要

A downhole tool, such as a toe sleeve, has an insert movably disposed in the housing's bore and sealably enclosing a second part of the communication path from a first port. A barrier disposed between the first and second parts of the communication path is breachable in response to a level of the applied pressure in the housing's bore. At least one retainer is engaged between the insert and the housing and at least temporarily retains the insert toward a closed position. The at least one retainer is at least partially composed of a dissolvable material and at least partially dissolves in response to the applied pressure communicated through the communication path to the second part. The at least one retainer when at least partially dissolved permits the applied pressure to initiate movement of the insert, such as from a closed position toward an opened position.

主权项

1. A downhole tool actuatable in response to applied pressure, the tool comprising:
a housing defining a housing bore therethrough, the housing having a communication path extending from a first part of the housing bore to a second part of the housing; an insert movably disposed in the housing bore; and at least one retainer engaged between the insert and the housing and being at least partially composed of a dissolvable material, the at least one retainer at least partially dissolving in response to the applied pressure communicated through the communication path to the second part and permitting the applied pressure to initiate movement of the insert.