Specializing In Well RehabilitationThe Pump Company
has spent over 25 years perfecting the well rehabilitation
process in Phoenix, AZ
. Back in the day, all well rehab was done with a cable tool rig, brush, and swab. With today's oil field technology, we have implemented many of the well cleaning methods used every day. The cable tool method of cleaning will do a great job of shining the inside of the casing, but if you are after a true well rehabilitation, you have to get to the outside of the casing into the annular space. It is important to clean the gravel pack, and into the alluvial fill behind the casing. The only way to achieve this is to stimulate with a combination of high pressure air, hydrochloric acid, and corrosion inhibitors. In the Phoenix basin for instance, we have a calcium and salt problem. The calcium can build up in the casing to a point that the perforations can be completely plugged up. Scratching and brushing can partially remove the buildup on the inside of the casing, and with a video survey it will look like a good job has been performed. What you don't see remains on the outside of the casing, and the back side of the perforations. We have found that hydrochloric acid will break down the calcium and the salts if it is administered in the correct manner. Calculating the mass of the standing water in the well, and injecting the correct percentage of hydrochloric acid with corrosion inhibitors is a must. Hydrochloric acid must be agitated to activate the chemical reaction.