What Is a Workover?
Well repairing generally refers to the maintenance of pipe wells such as water source wells, geothermal wells, oil wells, and brine brine wells. In recent years, except for major repairs to oil and gas wells by petroleum operations teams. Locally speaking, workover mostly refers to the maintenance work of geothermal wells and water source wells.
Workover
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- Chinese name
- Workover
- Foreign name
- well repair
- Well repairing generally refers to the maintenance of pipe wells such as water source wells, geothermal wells, oil wells, and brine brine wells. In recent years, except for major repairs to oil and gas wells by petroleum operations teams. Locally speaking, workover mostly refers to the maintenance work of geothermal wells and water source wells.
- The workover is mainly to detect and repair a series of faults such as insufficient water quantity, water temperature drop, sand gushing, and poor water quality in pipe wells such as geothermal wells and water source wells, so that the faulty well or the well near end of life will be put into production again. The geothermal wells and water wells that have failed can not run normally. If the water quantity is insufficient, too much power will be lost but the corresponding water quantity cannot be extracted. When the water temperature drops, the geothermal wells cannot play the basic performance of the geothermal wells. The damage is even greater when the electric pump is frequently burned. Because the proposed water content is too large, the pipeline will be blocked, and the sediment will also settle to the water filter tube at the bottom of the well casing, which will block the water in the water intake layer. If there is a gush of sand in a geothermal well, the silt will block the sieve tube in the water intake section, and the water in the thermal reservoir will not flow out normally, which will cause a shortage of water. If the gully point is close to the surface stratum, because a large amount of sediment is extracted, a large area of voids will appear between the strata, and the surface will settle when the stratum is dense, and the buildings on the surface will be immeasurably damaged. When Cangzhou Zhongshui Geothermal Engineering Company was constructing and maintaining a 2462-meter geothermal well at the Kunming training base of the National Civil Aviation Administration, the casing leak points of the well were at 310 meters, 930 meters, and 1017 meters, and there were sand gushing phenomena and water volume Insufficient and water temperature drops. Therefore, according to this case, the failure of pipe wells such as geothermal wells and water wells is caused in large part by the leakage of the well casing.
- There are many reasons for the leakage of well casing. The squeezing force generated when the earth's crust changes will cause great damage to the well casing. This is also the reason that the wells encountered in workover work cause the geothermal wells to fail. There is the quality of the casing used in drilling and whether each step of the operation is standardized during drilling; etc., and whether there are excessive exploitation of geothermal well water wells in a long period of use and whether any man-made damage to the well has occurred, etc. In the above situation, the workover team will appear.