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US 4,809,793 AGranted
Enhanced diameter clean-out tool and method
OwnerCharles D. Haileyinventor
Life of this patent
Estimating the term…
Abstract
A downhole cutting tool, specifically adapted to function as an enhanced diameter clean-out tool, includes longitudinal bores which are opened to fluid flow when cutting members are moved to their extended positions. Upper and lower subassemblies are connected through an adapter which establishes an angular offset between an upper pair of extendible members and a lower pair of extendible members, which upper pair functions as a stabilizing structure to stabilize rotation of the tool and which lower pair functions as an enhanced diameter cutter.
Claims24
A downhole cutting tool, comprising:
- a body including a slot defined laterally therethrough and further including a longitudinal cavity defined therein in communication with said slot;
- two cutting members pivotally mounted in said slot;
- movement means, disposed in said cavity so that said movement means is movable between a first position in said cavity and a second position in said cavity, for moving said cutting members to respective extended positions in response to a force acting on said movement means to move said movement means from said first position to said second position;
- and
- said body further including:
- first channel means, defined in said body and spaced from said slot, for communicating a liquid from said cavity to an outlet of said first channel means regardless of the position of said movement means between said first and second positions;
- and
- second channel means, defined in said body and spaced from said slot and said first channel means, for communicating a liquid from said cavity to an outlet of said second channel means in response to said movement means moving from said first position to said second position.
5 more elements
A downhole cutting tool, comprising:
- an elongated support having a continuous fluid communication path defined therein;
- a first pair of extendible members pivotally connected to said support to move between retracted and extended positions within a first longitudinal plane;
- first movement means, disposed in said support, for moving said first pair of extendible members to respective extended positions, said first movement means including a first piston disposed within said fluid communication path above said first pair of extendible members;
- a second pair of extendible members pivotally connected to said support above said first pair of extendible members to move between retracted and extended positions within a second longitudinal plane;
- second movement means, disposed in said support, for moving said second pair of extendible members to respective extended positions at a time subsequent to said first movement means moving said first pair of extendible members to their respective extended positions, said second movement means including a second piston disposed within said fluid communication path above said second pair of extendible members, said first and second pistons movable within said fluid communication path independently of each other;
- and
- wherein said second plane is offset at an angle from said first plane so that said first and second pairs of extendible members effect enhanced rotational stabilization in response to said first and second movement means moving said first and second pairs of extendible members to their respective extended positions and maintaining them thereat.
4 more elements
A method of cutting material located within a borehole having a tubing disposed therein, said method comprising the steps of:
- lowering a clean-out tool into the tubing, which clean-out tool includes:
- a first pair of members movable below the tubing to an extended position in response to a pressurized fluid, and a second pair of members movable below the tubing to an extended position in response to a pressurized fluid;
- rotating and lowering the clean-out tool through the lower end of the tubing and into the borehole;
- applying a pressurized fluid to the clean-out tool so that the first pair of members is moved to its extended position when the first pair of members is lowered below the tubing and into the borehole;
- transmitting, to the surface from which the borehole and tubing extend, a signal indicating the first pair of members has moved to its extended position within the borehole below the tubing;
- maintaining rotating and lowering the clean-out tool in the borehole through and after said step of transmitting and cutting the material with the extended first pair of members;
- maintaining applying a pressurized fluid to the clean-out tool so that the second pair of members is moved to its extended position when the second pair of members is lowered below the tubing and into the borehole;
- transmitting to the surface a signal indicating the second pair of members has moved to its extended position within the borehole below the tubing;
- and
- maintaining the first and second pairs of members in their respective extended positions simultaneously, and concurrently continuing rotating and lowering the clean-out tool against the material in the borehole, and stabilizing the rotating clean-out tool with the extended second pair of members and cutting the material in the borehole with the extended first pair of members.
7 more elements
A downhole cutting tool, comprising:
- an elongated support;
- a first pair of extendible members pivotally connected to said support to move between retracted and extended positions within a first longitudinal plane;
- first movement means, disposed in said support, for moving said first pair of extendible members to respective extended positions;
- a second pair of extendible members pivotally connected to said support to move between retracted and extended positions within a second longitudinal plane, said second plane offset at an angle from said first plane so that said first and second pairs of extendible members effect enhanced rotational stabilization;
- second movement means, disposed in said support, for moving said second pair of extendible members to respective extended positions;
- and
- wherein said support includes:
- a first cylindrical body, including a first longitudinal slot defined laterally therethrough and further including a first longitudinal cavity defined therein between an end of said first body and said first slot, said first slot having said first pair of extendible members mounted therein and said first cavity having said first movement means disposed therein;
- a second cylindrical body, including a second longitudinal slot defined laterally therethrough and further including a second longitudinal cavity defined therein between an end of said second body and said second slot, said second slot having said second pair of extendible members mounted therein and said second cavity having said second movement means disposed therein;
- and
- connector means for connecting said second body and said first body to establish said angle between said first and second planes.
8 more elements
Dependencies are inferred from the claim text.