Projects

Production Well 205 has a daily fluid output of 7.9 tons, daily oil output of 2.07 tons, and water content of 73.8%. The well was overhauled and installed with lined composite pipes on January 1, 2018.Before the installation of lined composite pipes, this well had been overhauled for 6 times throughout 2017. The detailed overhaul causes are listed as follows:February 26: Pump stuck overhaul caused by ball seat blockage from oil sludge inside the pump;April 24: Overhaul due to sucker rod fracture at No.104 and tubing fracture at No.111 caused by corrosion; June 28: Overhaul due to tubing fracture at No.118 caused by corrosion and eccentric wear; Read More

The well was repaired on July 22, 2019, and completed on July 25, 2019, with 152 tubing joints and one Φ44 mm sand control pump installed at a pump depth of 1560.19 m. One Φ44 mm piston and 171 sucker rods were run downhole.Before lining replacement, the well suffered severe eccentric wear. In 2018, three workovers were performed on this well caused by eccentric wear issues such as tubing rupture and rod parting, with an average pump inspection cycle of less than 100 days.To address the eccentric wear between sucker rods and tubing in this well, full-well lined tubing was deployed. On January 21, 2021, fluid output of the well declined, and pipe leakage was identified via logging surveys. During the repair of the downhole pipe string, severe wear was detected on the coupling thread between the 118th and 119th tubing joints, rendering the joint unusable.Inspection of the lining pipe revealed no eccentric wear on its inner wall. The well was successfully put back into service after the w Read More