Double-layer sealing structure of offshore oilfield drilling and production equipment tubing head

• Main Authors: ZHANG JIANGENG, LIU WEIXIANG, CHEN SHANGZE, LIU LUXI
• Format: Patent
• Language: Chinese; English
• Published: 05.06.2020
• 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 relates to the technical field of oil field drilling and production equipment, in particular to a double-layer sealing structure of an oil pipe head of offshore oil field drilling and production equipment, which comprises the oil pipe head, a valve flange is arranged above the oil pipe head, and a sealing device is arranged between the oil pipe head and the valve flange. A firstsealing ring is arranged on the top face of the flange, located on the upper portion, of the tubing head, and a second sealing ring is arranged on the bottom face of the valve flange. According to thedouble-layer sealing structure of the tubing head of the offshore oilfield drilling and production equipment, the sealing device is arranged between the tubing head and the valve flange; the traditional mode that the valve flange is directly connected with the tubing head is changed; meanwhile, the sealing ring and the sealing assembly are arranged on the sealing device at the same time, the double-layer sealing effect on