Back to results
US 6,796,380 B2Granted
High expansion anchor system
AssigneeBaker Hughes Incorporated
InventorYang Xu
Life of this patent
Estimating the term…
Abstract
An anchor system for high expansion applications is described. It features a gripping member that holds together a pair of links. The movement of the links is regulated to assure the gripping member moves into proper contact with the casing. Meshing gears or a pin and slot can do this, for example. The gripping member is shaped such that it can still transmit load through the links even if the pin connections fail. The gripping member is preferably contoured to the shape of the casing inner wall to enhance grip.
Claims22
A high expansion anchor system for a tool, for selective contact with a tubular downhole, comprising:
- a body having a longitudinal axis;
- at least one slip assembly mounted to said body, said slip assembly comprising:
- a linkage pivotally movable with respect to said body between a retracted and an expanded position;
- and
- a slip mounted to said linkage, said slip having a contact surface treatment such that movement of said linkage to said expanded position where said surface treatment of said slip contacts the tubular allows said surface treatment to resist forces applied to said body from opposed directions.
2 more elements
A high expansion anchor system for a tool, for selective contact with a tubular downhole, comprising:
- a body having a longitudinal axis;
- at least one slip assembly mounted to said body, said slip assembly comprising:
- a linkage pivotally movable with respect to said body between a retracted and an expanded position;
- and
- a slip mounted to said linkage whereupon movement of said linkage to said expanded position said slip contacts the tubular to resist forces applied to said body from opposed directions:
- said slip translates, without rotation, to contact the tubular as a result of said pivotal movement of said linkage;
- said linkage comprises a first and second links pivotally connected to said slip by pins;
- said first and second links are guided in their pivotal movement to limit the movement of said slip to purely translation;
- said guiding of said first and second links comprises contact therebetween to insure they both pivot in equal amounts.
6 more elements
A high expansion anchor system for a tool, for selective contact with a tubular downhole, comprising:
- a body having a longitudinal axis;
- at least one slip assembly mounted to said body, said slip, assembly comprising:
- a linkage pivotally movable with respect to said body between a retracted and an expanded position;
- and
- a slip mounted to said linkage whereupon movement of said linkage to said expanded position said slip contacts the tubular to resist forces applied to said body from opposed directions;
- said slip translates, without rotation, to contact the tubular as a result of said pivotal movement of said linkage;
- said linkage comprises a first and second links pivotally connected to said slit, by pins;
- said first and second links are guided in their pivotal movement to limit the movement of said slip to purely translation;
- said guiding of said first and second links comprises a first and a second guide links, said guide links being engaged to each other in a manner permitting relative movement between them.
6 more elements
A high expansion anchor system for a tool, for selective contact with a tubular downhole, comprising:
- a body having a longitudinal axis:
- at least one slip assembly mounted to said body, said slip assembly comprising;
- a linkage pivotally movable with respect to said body between a refracted and an expanded position:
- and
- a slip mounted to said linkage whereupon movement of said linkage to said expanded position said slip contacts the tubular to resist forces applied to said body from opposed directions;
- said slip translates, without rotation, to contact the tubular as a result of said pivotal movement of said linkage;
- said linkage comprises a first and second links pivotally connected to said slip by pins:
- said slip is longer than the distance between said pins;
- said slip comprises an outer face having at least one curve to enhance contact area with the tubular.
6 more elements
A high expansion anchor system for a tool, for selective contact with a tubular downhole, comprising:
- a body having a longitudinal axis;
- at least one slip assembly mounted to said body, said slip assembly comprising:
- a linkage pivotally movable with respect to said body between a retracted and an expanded position;
- and
- a slip mounted to said linkage whereupon movement of said linkage to said expanded position said slip contacts the tubular to resist forces applied to said body from opposed directions;
- said slip translates, without rotation, to contact the tubular as a result of said pivotal movement of said linkage;
- said linkage comprises a first and second links pivotally connected to said slip by pins;
- said slip, is longer than the distance between said pins;
- said slip comprises at least one interior surface adjacent said pin for load transfer from said slip to at least one of said first and second links should said pin holding that link to said slip weaken or fail under load.
6 more elements
A high expansion anchor system for a tool, for selective contact with a tubular downhole, comprising:
- a body having a longitudinal axis;
- at least one slip assembly mounted to said body, said slip assembly comprising:
- a linkage pivotally movable with respect to said body between a retracted and an expanded position;
- and
- a slip mounted to said linkage whereupon movement of said linkage to said expanded position said slip contacts the tubular to resist forces applied to said body from opposed directions;
- said linkage comprises a first and second links pivotally connected to said slip by pins;
- said first and second links are guided by contact therebetween to allow them to pivot in substantially equal amounts.
4 more elements
A high expansion anchor system for a tool, for selective contact with a tubular downhole, comprising:
- a body having a longitudinal axis;
- at least one slip assembly mounted to said body, said slip assembly comprising:
- a linkage pivotally movable with respect to said body between a retracted and an expanded position;
- and
- a slip mounted to said linkage whereupon movement of said linkage to said expanded position said slip, due to translation, contacts the tubular to resist forces applied to said body from opposed directions;
- said linkage comprises a first and second links pivotally connected to said slip by pins;
- a first and a second guide links, respectively connected to said first and second links, said guide links being engaged to each other in a manner permitting relative movement between them.
4 more elements
A high expansion anchor system for a tool, for selective contact with a tubular downhole, comprising:
- a body having a longitudinal axis;
- at least one slip assembly mounted to said body, said slip assembly comprising:
- a linkage pivotally movable with respect to said body between a retracted and an expanded position;
- and
- a slip mounted to said linkage whereupon movement of said linkage to said expanded position said slip contacts the tubular to resist forces applied to said body from opposed directions;
- said slip comprises an outer face having at least one curve to enhance contact area with the tubular.
3 more elements
A high expansion anchor system for a tool, for selective contact with a tubular downhole, comprising:
- a body having a longitudinal axis;
- at least one slip assembly mounted to said body, said slip assembly comprising:
- a linkage pivotally movable with respect to said body between a retracted and an expanded position;
- and
- a slip mounted to said linkage whereupon movement of said linkage to said expanded position said slip contacts the tubular to resist forces applied to said body from opposed directions;
- said linkage comprises a first and second links pivotally connected to said slip by pins;
- said slip comprises at least one interior surface adjacent said pin for load transfer from said slip to at least one of said first and second links should said pin holding that link to said slip weaken or fail under load.
4 more elements
Dependencies are inferred from the claim text.