Completion string for oil and gas well

• Main Authors: QIANG YANLONG, WANG WEIYAN, SHI WEN, BIAN JIANG, LIU JING, YAN XIAXIA
• Format: Patent
• Language: Chinese; English
• Published: 16.04.2014
• 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 completion string for an oil and gas well, and belongs to the technical field of completion strings of oil production engineering. The completion string for the oil and gas well comprises an inner oil pipe, a safety valve and a hydraulic control pipeline, wherein an adapter connector is connected with the upper portion of the safety valve in a threaded mode, a stair-shaped inner shoulder and connecting threads are arranged on the adapter connector, and are connected with the inner oil pipe and an outer pipe respectively, a through hole is formed in the inner shoulder of the adapter connector, the hydraulic control pipeline is arranged in an annular space between the inner oil pipe and the outer pipe, penetrates through the through hole formed in the inner shoulder of the adapter connector, and is sealed by a sealing part, and the inner oil pipe is fixedly connected with the hydraulic control pipeline through a snap ring. According to the completion string for the oil and gas well