recover fish(Shooting to recover or remove fish in fishing operations is not subject to the oil and gas well servicing tax. "Fish" are any obstructions in a wellbore which are not natural. These may include drill bits or parts of them which have been broken off or otherwise disconnected from the drill pipe. The fish may be any number of sections or pipe and drill collars which have twisted off in the threads or broken in half along their length. The fish may be hand tools or other metal objects which have fallen into the wellbore from the surface. Shooting to recover or remove fish is done for the purpose of breaking these obstructions into small pieces with an explosive charge. The smaller pieces are picked up more readily by magnets or special baskets. The disintegration can be accomplished by lowering an ordinary nitroglycerin charge, shaped charge gun, or other explosive device into the well and exploding it in contact with the fish. ewg.org)
