I have always used tape reel for the Packer tests. Unless you use it, you will never realize how helpful it is when determining depth of the straddle interval.
Usually the NQ/NX holes are drilled and cores are recovered and recorded. Once the drilling is complete, it is ready for Packer testing once the drillers pull all of the drill rods.
Most of the time, an AQ rod or “1 inch waterlines” are used to connect to the Packers. AQ rods are usually 10 feet long while the waterlines are 21 feet.
Most of us calculate the depth by counting the number of rods going down the borehole. Such as, if you need to set up the top of the packer at 50 feet, you need 5 AQ rods (caution – I am ignoring the length of the connector rods if used to attach the packer to the AQ rods and also assuming there is no stick up).
Specially if you are testing a deep hole, counting rods and keeping tack of them is really difficult. I always use 300 feet tape reel and tape to the AQ rod. I set 0 (zero) feet at the bottom of the top packer. This completely removes the burden of counting rods.
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