Wellhead device of oil field water injection well

• Main Authors: KANG YONGFANG, GU CHAOFENG, XING YAN
• Format: Patent
• Language: Chinese; English
• Published: 15.10.2019
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The utility model discloses a wellhead device of an oil field water injection well. The device comprises a buffer tank and a flange plate, the bottom surface of the buffer tank is connected with a sleeve through the flange plate, the top surface of the buffer tank is connected with a hot-pressing elbow through the flange plate, the end part of the hot-pressing elbow is connected with a corrugatedmetal hose through the flange plate, and the end part of the corrugated metal hose is connected with a water injection pipe through the flange plate. Beneficial effects are that: the method is suitable for large-scale production; the pressure of water in the buffer tank drives the indicating rod to ascend; the pressure state in the buffer tank is indicated through the relative positions of the scale marks on the surface of the indication rod and the top cover; when the pressure in the buffer tank is abnormal, the indicating rod can ascend or descend under the action of the spring due to increase or decrease of the wat