Swab resistant seal tool and system

Abstract

A swab resistant seal tool, includes a seal mandrel, a seal element, and a releaser securing the seal element to the mandrel under a tensile load. The releaser is releasable upon being exposed to a trigger. A method for assembling a swab resistant seal tool includes disposing a seal element on a mandrel, securing a first end of the seal element to the mandrel, imparting a tensile load to the seal element, and securing a second end of the seal element to the mandrel. A method for operating a seal tool includes resisting swabbing of a seal by holding tension in the seal element and setting the seal tool by releasing a releaser. A borehole system including a borehole in a subsurface formation, a string in the borehole, a seal tool disposed within or as a part of the string.

What is claimed is: 
     
         1 . A swab resistant seal tool, comprising:
 a seal mandrel;   
       a seal element disposed on the mandrel; and 
       a releaser securing the seal element to the mandrel under a tensile load borne in the seal element, the releaser being releasable upon being exposed to a trigger. 
     
     
         2 . The seal tool as claimed in  claim 1 , wherein the trigger is a load. 
     
     
         3 . The seal tool as claimed in  claim 1 , wherein the trigger is an electric signal. 
     
     
         4 . The seal tool as claimed in  claim 1 , wherein the releaser is a shear member. 
     
     
         5 . The seal tool as claimed in  claim 1 , further including a gripper disposed on the mandrel and in gripping contact with the seal element. 
     
     
         6 . The seal tool as claimed in  claim 5 , wherein the gripper is between the releaser and the seal element. 
     
     
         7 . The seal tool as claimed in  claim 5 , wherein the gripper includes a hook configured to interact with the seal element and impart a tensile load to the seal element. 
     
     
         8 . The seal tool as claimed in  claim 5 , wherein the gripper is secured to the mandrel with the releaser. 
     
     
         9 . The seal tool as claimed in  claim 5 , wherein the gripper is two grippers, one on each longitudinal end of the seal element. 
     
     
         10 . The seal tool as claimed in  claim 9 , wherein one of the two grippers is secured to the mandrel by releaser and the other gripper is secured to the mandrel by another releaser. 
     
     
         11 . A method for assembling a swab resistant seal tool comprising:
 disposing a seal element on a mandrel;   securing a first end of the seal element to the mandrel;   imparting a tensile load to the seal element in a longitudinal direction of the mandrel; and   securing a second end of the seal element to the mandrel.   
     
     
         12 . The method as claimed in  claim 11 , wherein the securing the second end is with a releaser. 
     
     
         13 . A method for operating a seal tool comprising:
 running the seal tool in a borehole;   resisting swabbing of a seal of the seal tool by holding tension in the seal element of the seal tool;   setting the seal tool by releasing a releaser of the seal tool that releases the tension held in the seal element of the seal tool.   
     
     
         14 . The method as claimed in  claim 13 , wherein the releasing is by applying sending a signal to the releaser to release. 
     
     
         15 . The method as claimed in  claim 13 , wherein the signal is a load. 
     
     
         16 . A borehole system comprising:
 a borehole in a subsurface formation;   a string in the borehole;   a seal tool as claimed in  claim 1  disposed within or as a part of the string.