Impression block function:
Impression Block is an effective tool used to determine the dimensions, configuration, condition, and location of the top end of a fish in the hole.
Impression block construction:
The impression blocks are manufactured with a high strength alloy steel body and a soft lead insert at the lower end. All impression blocks come with a watercourse that allows flushing of the fish top before the tool is lowered against it. Impression blocks without a watercourse can be furnished upon request.
Impression block operation
Attach the impression block to the bottom of the fishing string and lower into the well-hole. Do not rotate the tool, slowly lower the impression block to the point of contact with the fish. Apply weight on the impression block to make an imprint of the fish on the soft lead insert and lift it from the hole.
When ordering, please specify:
●Complete assembly or part number
●Top connection
●Lead O.D.
Specifications - Impression Block
No. | Specification | Thread Connection | I.D.of Lead Die | Total Length | |
O.D. | Thread Model (in) | ||||
1 | 270 | 203 | 6 5/8 REG | 40 | 380 |
2 | 225 | 165 | 4 1/2 IF | 40 | 380 |
3 | 195 | 159 | 4 IF | 30 | 370 |
4 | 170 | 121 | 3 1/2 IF | 30 | 370 |
5 | 120 | 105 | 2 7/8 IF | 20 | 350 |
6 | 100 | 89 | 2 3/8 IF | 20 | 350 |