A lead impression block is an effective tool used to determine dimensions, configuration, condition, and location of the top end of a fish in the hole.
Make up the impression block to the bottom of the fishing string and run into the hole.
Lead Impression Blocks are manufactured with a high strength alloy steel body and a soft lead insert at the lower end. All impression blocks (except those with sucker rod connections) are provided with a watercourse for flushing the top of the fish before lowering the tool against it. Impression blocks without a watercourse can be furnished upon request.
Lead O.D. is available in 1 to 17-1/4 inches. Additional sizes are available upon request