The resistance of the tool on the drill pipe as it comes up out of the hole has almost zero weight to it. The weight of the operators is all that is required to keep the tool down. Special wiper blades are available for specific applications such as wiping mud from drill collars or heavy spirals. These special wiper blades allow almost 80% mud recovery by wiping mud from the hard to reach places that are left out by conventional wipers.
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Bhosari, Pune, Maharashtra