FiveyRanch
New Member
Hi...first time here. We just had a 340' well drilled to complete in 40' of fine sand. It was a 10" well with a 16/30 gravel pack and a 3" .014 screen to get us 3" of gravel pack thickness. It has a 2 hp pump set at 260' with the top of sand at 280'. We open flowed the well at 18.5 gpm for multiple days trying to clear the sand up. The driller has jetted the well twice. After 48 hour or so of open flow the well clears up of sand but when i shut it off for the night and turn on in the morning it produces a lot of sand that will slowly decrease over 2 days on open flow and then when I shut the well down over night the whole process starts over again with the sand. The driller now wants to cycle it on and off for a week to see if that helps. He is dumbfounded by the way the well is behaving. I have refused to pay him until I get a sand free well. I had a grain size analysis done and the sand when the well was drilled and it ranges from .03 mm to .3 mm. The driller said this size gravel pack would work. Can anyone give me some ideas on what is happening? Thanks