Wellbore anchor

Abstract

An anchor tool has a body, a plurality of slips coupled to the body, each of the slips hingedly coupled to a link at a first end, each of the slips slidably retained in a channel at a second end and each of the slips operably moveable from a retracted orientation to an expanded orientation.

1 . An anchor tool, comprising:
 a body;   a plurality of slips coupled to said body;   each said slip hingedly coupled to a link at a first end;   each said slip slidably retained in a channel at a second end;   each said slip operably moveable from a retracted orientation to an expanded orientation.   
     
     
         2 . The anchor tool of  claim 1 , wherein the link is coupled to and selectively received within a complementary link recess of the body. 
     
     
         3 . The anchor tool of  claim 1 , wherein the slip is selectively at least partially received within a complementary slip recess of the body. 
     
     
         4 . The anchor tool of  claim 1 , further comprising a mandrel coupled to the body and extending from the body, and a cap coaxially aligned with the mandrel and having an inclined surface to engage an inclined inner surface of each said slip. 
     
     
         5 . The anchor tool of  claim 4 , wherein the cap is slidably received on the mandrel such that the inclined surface engages each said slip inclined surface between the retracted and expanded orientations. 
     
     
         6 . The anchor tool of  claim 5 , wherein each said link hingedly couples each said slip to the body between the retracted and expanded orientations. 
     
     
         7 . The anchor tool of  claim 4 , wherein the cap is movable in response to application of a fluid pressure to an exterior of the mandrel. 
     
     
         8 . The anchor tool of  claim 7 , wherein in response to moving the cap toward the body, each said slip moves between the retracted orientation and the expanded orientation. 
     
     
         9 . An anchor tool, comprising:
 a body comprising an outer diameter, the body being substantially coaxially aligned with a central axis of the anchor tool;   a link coupled to the body, the link being both retractable relative to the body and rotatable relative to the body;   a cap comprising an inclined surface, the cap being coaxially aligned with the central axis; and   a slip, the slip being rotatably coupled to the link and the slip comprising an inclined surface configured for selective sliding engagement with the inclined surface of the cap.   
     
     
         10 . The anchor tool of  claim 9 , wherein the link is selectively received within a complementary link recess of the body. 
     
     
         11 . The anchor tool of  claim 9 , wherein the slip is selectively at least partially received within a complementary slip recess of the body. 
     
     
         12 . The anchor tool of  claim 9 , further comprising a mandrel, the mandrel being rigidly coupled to the body and the mandrel being slidably received through the cap. 
     
     
         13 . The anchor tool of  claim 12 , wherein the cap is movable in response to increasing a fluid pressure supplied to the anchor tool. 
     
     
         14 . The anchor tool of  claim 12 , wherein the cap is movable in response to application of a fluid pressure to an exterior of the mandrel. 
     
     
         15 . The anchor tool of  claim 12 , wherein in response to moving the cap, the slip is moved radially relative to the central axis. 
     
     
         16 . The anchor tool of  claim 15 , wherein the slip is substantially prevented from rotating relative to the central axis. 
     
     
         17 . The anchor tool of  claim 12 , wherein the mandrel comprises a central passage and an associated flow orifice for receiving fluid. 
     
     
         18 . An anchor tool, comprising:
 a body comprising an outer diameter and a recess;   a link pivotally coupled to the body in the recess and below the outer diameter;   a slip pivotally coupled to the link, the slip comprising an engagement surface; and   a cap moveably coupled to the body;   wherein the slip is captured between the body and the cap, the cap moveable to engage a cap engagement surface with the slip engagement surface.   
     
     
         19 . The anchor tool of  claim 18 , wherein the link is translatable relative to the body. 
     
     
         20 . A method of operating an anchor tool, comprising:
 locating the anchor tool in a well bore;   altering a fluid pressure supplied to the anchor tool;   moving a cap of the anchor tool toward a body of the anchor tool, wherein a slip of the anchor tool is connected to the body via a rotatable link and wherein the cap comprises an inclined surface; and   in response to moving the cap toward the body, radially moving the slip relative to the central axis while substantially preventing rotation of the slip relative to the central axis.