Method for using a downhole tool for guiding a cutting tool

摘要

An apparatus that includes a guiding tool for transferring fluid pressure to movement of a cutting tool relative to the guiding tool while the cutting tool is cutting slots in a casing or formation via at least one nozzle disposed in the cutting tool. Furthermore, a method of cutting a slot in a casing or formation using the apparatus.

主权项

1. A method, the method comprising:
cutting a slot in a casing or formation by employing a cutting tool supported by a guiding tool, the guiding tool converts fluid pressure to movement of the cutting tool relative to the guiding tool while the cutting tool is cutting slots in the casing or the formation via at least one nozzle disposed in the cutting tool, the guiding tool comprising:
a timer mandrel slidably disposed within a housing;a lower mandrel at least partially slidably disposed in the housing, the lower mandrel supported by the timer mandrel on one end and attachable to another downhole tool on another end; anda restricted flow path that restricts flow of hydraulic fluid from a lower chamber of the hydraulic fluid chamber to an upper chamber of the hydraulic fluid chamber to reduce the rate at which the lower mandrel extends from the housing when fluid is pressured up in the guiding tool.