Liner hanger

Abstract

A liner hanger can include a first set of slips; a second set of slips; a first actuation mechanism for actuation of the first set of slips; and a second actuation mechanism for actuation of the second set of slips where the first set of slips, in an unactuated state, prevent actuation of the second set of slips via the second actuation mechanism.

What is claimed is: 
     
         1 . A liner hanger comprising:
 a first set of slips;   a second set of slips;   a first actuation mechanism for actuation of the first set of slips; and   a second actuation mechanism for actuation of the second set of slips wherein the first set of slips, in an unactuated state, prevent actuation of the second set of slips via the second actuation mechanism.   
     
     
         2 . The liner hanger of  claim 1  wherein the first set of slips comprises liner hanger slips. 
     
     
         3 . The liner hanger of  claim 1  wherein the second set of slips comprises hold down slips. 
     
     
         4 . The liner hanger of  claim 1  wherein each slip of the first set of slips comprises a member and wherein each slip of the second set of slips comprises a stem portion wherein the members cover the stem portions to prevent actuation of the second set of slips. 
     
     
         5 . The liner hanger of  claim 1  wherein the first actuation mechanism comprises an annular component that is axially translatable to move the first set of slips in an axial direction. 
     
     
         6 . The liner hanger of  claim 1  wherein the second actuation mechanism comprises biasing elements that release stored potential energy to move the second set of slips in an axial direction. 
     
     
         7 . The liner hanger of  claim 1  wherein the first actuation mechanism comprises an annular component that is axially translatable to move the first set of slips in a first axial direction and wherein the second actuation mechanism comprises biasing elements that release stored potential energy to move the second set of slips in a second axial direction. 
     
     
         8 . The liner hanger of  claim 1  wherein the second actuation mechanism comprises shear screws wherein each slip of the second set of slips comprises an opening that receives at least a portion of a respective one of the shear screws. 
     
     
         9 . The liner hanger of  claim 1  wherein the first actuation mechanism is fluid pressure actuatable. 
     
     
         10 . The liner hanger of  claim 1  wherein the second actuation mechanism is mechanically actuatable. 
     
     
         11 . The liner hanger of  claim 1  wherein the first actuation mechanism is fluid pressure actuatable and wherein the second actuation mechanism is mechanically actuatable. 
     
     
         12 . The liner hanger of  claim 1  comprising a slip seating sleeve wherein the slip seating sleeve seats the first set of slips and seats the second set of slips. 
     
     
         13 . The liner hanger of  claim 12  comprising a pipe wherein the slip seating sleeve is disposed on the pipe. 
     
     
         14 . The liner hanger of  claim 13  wherein the pipe is rotatable with respect to the slip seating sleeve. 
     
     
         15 . The liner hanger of  claim 14  wherein the second actuation mechanism comprises the pipe and the slip seating sleeve and wherein the second actuation mechanism is actuatable for an actuated state of the first set of slips that fixes the azimuthal position and axial position of the slip seating sleeve. 
     
     
         16 . The liner hanger of  claim 15  wherein the second actuation mechanism comprises one or more shear elements that shear responsive to rotation of the pipe with respect to the fixed azimuthal position and axial position of the slip seating sleeve. 
     
     
         17 . A method comprising:
 axially translating a first set of slips of a liner hanger to transition a second set of slips of the liner hanger to an actuatable state; and   actuating the second set of slips.   
     
     
         18 . The method of  claim 17  wherein actuating the second set of slips comprises releasing stored potential energy of one or more biasing elements for axially translating the second set of slips. 
     
     
         19 . The method of  claim 17  wherein the actuating comprises shearing at least one shear element and wherein each of the slips of the second set of slips comprises an opening that receives at least a portion of a respective one of the at least one shear element. 
     
     
         20 . The method of  claim 17  wherein the actuating comprises mechanically actuating and wherein the axially translating occurs responsive to actuating a fluid pressure actuation mechanism.