Rotating grip arms

Abstract

A packer and apparatus for engaging the packer within a bore. The apparatus comprises a central body and a cone secured to the central body having an inclined surface oriented towards the second end and a collar translatable along the central body, the collar being located between the cone and the second end of the central body and a plurality of arms, each arm pivotally located relative to the collar around a periphery of the central body, arms extending between first and second ends and having gripping surfaces around an exterior surface thereof proximate to the first ends. The method comprises translating the central member of the body relative to a collar therearound so as to frictionally drag the collet arms against a well bore and engaging the cone upon the plurality of arms to pivot the plurality of anus into contact with a well bore wall.

What is claimed is: 
     
         1 . An apparatus for engaging a body within a bore, the apparatus comprising:
 a central body extending between first and second ends;   a cone secured to said central body having an inclined surface oriented towards said second end;   a collar translatable along the central body, said collar being located between said cone and said second end of said central body; and   a plurality of arms, each arm pivotally located relative to said collar around a periphery of said central body, arms extending between first and second ends and having gripping surfaces around an exterior surface thereof proximate to said first ends.   
     
     
         2 . The apparatus of  claim 1  wherein said collar includes a plurality of longitudinal grooves around an exterior surface thereof each sized to receive an arm therein. 
     
     
         3 . The apparatus of  claim 2  further comprising a cage surrounding said collar and said arms adapted to retain said arms within said grooves. 
     
     
         4 . The apparatus of  claim 3  wherein said cage extends between first and second ends and includes a plurality of apertures each at a location corresponding to said arms wherein each arm pivots about a portion of said cage between said aperture and said first end of said cage. 
     
     
         5 . The apparatus of  claim 2  wherein said arms and said collar form a void under each arm within each longitudinal groove. 
     
     
         6 . The apparatus of  claim 5  wherein said cage includes bore therethrough in fluidic communication with said void between said arms and said collar. 
     
     
         7 . The apparatus of  claim 1  wherein said collar further includes a plurality of longitudinally extending collet arms radially outwardly biased to engage upon a well bore and cause drag therebetween. 
     
     
         8 . The apparatus of  claim 1  wherein said central body includes a profiled groove therein adapted receive a pin extending from said collar wherein said slot includes alternating long and short parallel slots extending longitudinally therealong and angled surface to advance said pin to successive long and short parallel slots as said central body is reciprocated relative to said collar so as to position said collar at to permit said arms to extend from said central body when said pin is in said long slots and limit extension of said arms when pin is in said short slots. 
     
     
         9 . A packer comprising:
 a central tubular member having a central bore therethrough extending between first and second ends;   a sealing element extending around said central tubular member adapted to be longitudinally compressed so as to axially expand said sealing element into contact with a surface of a well bore;   a cone secured to said tubular member having an inclined surface oriented towards said second end;   a collar translatable along the tubular body between said cone and said second end of said central body; and   a plurality of arms, each arm pivotally located relative to said collar around a periphery of said tubular member, arms extending between first and second ends and having gripping surfaces around an exterior surface thereof proximate to said first ends.   
     
     
         10 . The packer of  claim 9  wherein said collar includes a plurality of longitudinal grooves around an exterior surface thereof each sized to receive a arm therein. 
     
     
         11 . The packer of  claim 10  further comprising a cage surrounding said collar and said arms adapted to retain said arms within said grooves. 
     
     
         12 . The packer of  claim 11  wherein said cage extends between first and second ends and includes a plurality of apertures each at a location corresponding to said arms wherein each arm pivots about a portion of said cage between said aperture and said first end of said cage. 
     
     
         13 . The packer of  claim 10  wherein said arms and said collar form a void under each arm within each longitudinal groove. 
     
     
         14 . The packer of  claim 11  wherein said cage includes bore therethrough in fluidic communication with said void between said arms and said collar. 
     
     
         15 . The apparatus of  claim 9  wherein said collar further includes a plurality of longitudinally extending collet arms radially outwardly biased to engage upon a well bore and cause drag therebetween. 
     
     
         16 . The apparatus of  claim 9  wherein said central body includes a profiled groove therein adapted receive a pin extending from said collar wherein said slot includes alternating long and short parallel slots extending longitudinally therealong and angled surface to advance said pin to successive long and short parallel slots as said central body is reciprocated relative to said collar so as to position said collar at to permit said arms to extend from said central body when said pin is in said long slots and limit extension of said arms when pin is in said short slots. 
     
     
         18 . The packer of  claim 9  wherein said sealing elements comprises a plurality of tubular elements disposed annularly around said central member. 
     
     
         19 . The packer of  claim 18  wherein said tubular elements include annular springs encased therein. 
     
     
         20 . The packer of  claim 9  further including top and bottom extrusion blocks disposed annularly around said tubular member to opposed sides of said sealing element. 
     
     
         21 . The packer of  claim 20  wherein said bottom extrusion block is at a fixed location relative to said cone wherein said top extrusion block is longitudinally slidable along said tubular member so as to compress said sealing elements therebetween. 
     
     
         22 . A method for engaging a body within a bore, the apparatus comprising:
 locating said body having a central body central member and a cone located around said cone, said central body having a central bore therethrough extending between first and second ends within a well bore at a desired location;   translating said central member of said body relative to a collar therearound so as to frictionally drag radially outwardly biased collet arms against a well bore;   engaging a cone secured to said central body upon said plurality of arms to pivot said plurality of arms into contact with a well bore wall.