Downhole seal and anchor releasing system and method

Abstract

A downhole seal and anchor releasing device includes, a seal defeatable via a first pull, an anchor releasable via a second pull, and an energy dissipation device configured to dissipate enough energy from the first pull subsequent defeat of the seal to prevent release of the anchor in response to the first pull

1 . A downhole seal and anchor releasing device, comprising:
 a seal defeatable via a first pull;   an anchor releasable via a second pull; and   an energy dissipation device configured to dissipate enough energy from the first pull subsequent defeat of the seal to prevent release of the anchor in response to the first pull.   
   
   
       2 . The downhole seal and anchor releasing device of  claim 1 , wherein the seal and anchor are in operable communication with a whipstock. 
   
   
       3 . The downhole seal and anchor releasing device of  claim 1 , further comprising a bypass valve configured to equalize pressure across the seal prior to release of the seal from sealing engagement with a tubular. 
   
   
       4 . The downhole seal and anchor releasing device of  claim 1 , wherein the seal is configured to equalize pressure thereacross in response to being released prior to release of the anchor. 
   
   
       5 . The downhole seal and anchor releasing device of  claim 1 , wherein a force threshold to release the anchor less than twice a force threshold to defeat the seal. 
   
   
       6 . The downhole seal and anchor releasing device of  claim 1 , wherein the energy dissipation device includes at least one of a spring, a fluid dampener and a crushable member. 
   
   
       7 . The downhole seal and anchor releasing device of  claim 6 , wherein the spring is a cupped spring washer. 
   
   
       8 . The downhole seal and anchor releasing device of  claim 6 , wherein the fluid dampener includes a chamber with fluid therein and at least one opening in the chamber for escape of the fluid from the chamber in response to a piston moving within the chamber. 
   
   
       9 . The downhole seal and anchor releasing device of  claim 8 , wherein the fluid is at least one of, oil, grease and water. 
   
   
       10 . The downhole seal and anchor releasing device of  claim 1 , further comprising a first force failing member for releasably positioning the seal and a second force failing member for releasably positioning the anchor. 
   
   
       11 . The downhole seal and anchor releasing device of  claim 1 , wherein at least one of the first pull and the second pull are from surface. 
   
   
       12 . A downhole seal and anchor releasing method, comprising:
 defeating the seal with a first pull;   dissipating energy subsequent to defeating of the seal such that energy remaining from the first pull is below an energy threshold required to release the anchor; and   releasing the anchor with a second pull.   
   
   
       13 . The downhole seal and anchor releasing method of  claim 12 , wherein the dissipating energy includes increasing stored energy of an energy storing member. 
   
   
       14 . The downhole seal and anchor releasing method of  claim 12 , wherein the dissipating energy includes pressurizing a fluid and flowing at least a portion of the pressurized fluid through at least one opening. 
   
   
       15 . The downhole seal and anchor releasing method of  claim 12 , wherein the dissipating energy includes crushing a crushable member. 
   
   
       16 . The downhole seal and anchor releasing method of  claim 12 , further comprising decreasing a pressure differential across the seal subsequent to release of the seal and prior to release of the anchor. 
   
   
       17 . The downhole seal and anchor releasing method of  claim 12 , wherein a force of the second pull is less than twice a force of the first pull. 
   
   
       18 . The downhole seal and anchor releasing method of  claim 12 , wherein defeating the seal includes failing a force failing member. 
   
   
       19 . The downhole seal and anchor releasing method of  claim 12 , wherein releasing the anchor includes failing a force failing member. 
   
   
       20 . A downhole seal and anchor releasing system comprising:
 a seal sealably engagable with a downhole structure;   a valve in functional communication with the seal being configured to bypass the seal in response to a first pull;   an anchor engagable with the downhole structure and releasable with a second pull; and   an energy dissipation device configured to dissipate energy from the first pull sufficient to prevent release of the anchor subsequent to the first pull and advance of the second pull.