ZPEB Workover Services is mainly engaged in such engineering services as well repairing, side-tracking, fracturing, acidizing, well testing, production test, well completion, reformation of reservoir, coal-bed methane drilling and testing, and well maintenance operation. It has obtained ISO 9001 and ISO9002 Quality System Certification

ZPEB Workover has been equipped with 854 sets of advanced equipment and downhole tools, including American-made H-1000, H-1400, H-2000, SS-1000 fracturing units, CO2 foam fracturing unit, Liquid Nitrogen Pumping Unit, Schlumberger full-diameter (bore) formation testing units, FLOPETROL formation testing unit, skid-mounted well testing drawworks, inflatable testing unit, America-made three-phase separators with processing capacity of 300,000m3/day, 500,000m3/day, and 1,700,000 m3/day respectively, wheeled hoist tractors, Ingersollrand Model 400, Idec 80T, 100T, and 120T , XJ-750 (140t), XJ-650 (120t), XJ-550 (100t), XJ-450 (80t) truck-mounted workover rigs, America-made 120t swivels, various kinds of Hallibuton downhole tools for fracturing and well completion, and many China-made heavy-duty special operation equipment.

ZPEB Workover is competent at various downhole operations in complicated formations. As for formation fracturing technologies, it can perform various fracturing operations, such as large-scale fracturing, separated-zone fracturing, controlled fracture-height fracturing, limited entry fracturing, CO2 foam fracturing, high-energy gas fracturing, and liquid nitrogen discharging operation and coal-bed methane modification by fracturing. As for the technologies of well testing and production test, it can undertake various operations such as straddle-packer test, perforating with testing, PCT testing, inflatable packer testing, surface read-out testing, and surface testing by three-phase separators. As for the technologies of workover, it can undertake operations such as running-in and pulling-out liners and casings in open-hole, detecting free point, downhole cutting, plugging, patching, explosion shaping, and back-off operation as well as milling, fishing, and side-tracking operation. Furthermore, it can also perform acidization, stimulation, and augmented injection.

ZPEB Workover has completed various workover operations in its own oilfield and other oilfields in China. It has many times offered services in the drilling projects performed by well-known foreign oil companies in China, and has successfully performed workover operation, well test and production test in Ethiopia and Sudan. During the operation, it takes the international practice as its norms, strictly observe the operation rules and regulations, strengthens quality control and has won high opinions from clients by its high quality and high efficient service.