Self-expanding patching device and method for oil well casing

• Main Authors: SUN YULAI, YANG HUILI, LIU RUI, ZHANG XINZHU, XI YUNTAO, LI QIONGWEI, CHENG BIHAI, HE ZHIWU, ZHANG ZHENYUN, LI MEIYU
• Format: Patent
• Language: Chinese; English
• Published: 25.05.2016
• 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 invention discloses a self-expanding patching device and method for an oil well casing. The method comprises the following steps: taking a memory alloy pipe of which the outer diameter is smaller than the inner diameter of the casing as a patching pipe substrate; fixing a rubber seal ring on the...