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US 9,316,094 B2Granted
Method for using a downhole tool for guiding a cutting tool
AssigneeThru Tubing Solutions, Inc.
InventorsBrock Watson, Roger Schultz
Life of this patent
Estimating the term…
Abstract
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.
Claims17
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;
- and
- a 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.
2 more elements
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 and rotatably disposed within a housing;
- a bottom sub having a first cam attached thereto and rotatably supported by the housing, the first cam having an embossed helical pattern disposed thereon;
- a guiding element supported by the timer mandrel and having a guiding pin to engage the embossed helical pattern to transfer downward movement of the timer mandrel into rotational movement of the bottom sub as the guiding element is forced downward by the timer mandrel and forces the first cam and bottom sub to rotate as the guiding pin engages the embossed helical pattern;
- and
- a 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 timer mandrel is shifted when fluid is pressured up in the guiding tool.
3 more elements
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 and rotatably disposed within a housing;
- a bottom sub rotatably supported by the housing, the bottom sub having a first cam attached thereto and a tubular member extending therefrom, the first cam having an embossed helical pattern disposed thereon;
- a second cam rotatably supported on a lower end of the timer mandrel, the second cam having an embossed helical pattern disposed thereon and a passageway disposed therethrough for slidably receiving the tubular member extending from the bottom sub;
- a guiding pin disposed on an inside portion of the housing to engage the embossed helical pattern disposed on the second cam to force the second cam to rotate as the timer mandrel slides in the downhole direction in the guiding tool;
- a guiding element supported by the second cam and having a guiding pin to engage the embossed helical pattern on the first cam to transfer downward movement of the timer mandrel and the second cam and rotational movement of the second cam into increased rotational movement of the bottom sub as the second cam is forced downward and slidably receives the tubular member extending from the bottom sub;
- and
- a 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 timer mandrel is shifted when fluid is pressured up in the guiding tool.
5 more elements
Dependencies are inferred from the claim text.