A one-pass pipe string layered water injection sand control backwashing device and a method

• Main Authors: LUO CHANGHUA, LIU YIGANG, ZOU JIAN, MENG XIANGHAI, NIU GUIFENG, ZHANG ZHIXIONG, YANG WANYOU
• Format: Patent
• Language: Chinese; English
• Published: 27.11.2018
• 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 one-pass pipe string layered water injection sand control backwashing device, comprises a reservoir casing which is inserted into the first injection layer, the second injection layer, the third injection layer and the fourth injection layer in turn, wherein the reservoir casing is provided with an inner layer setting sealing water injection backwashing integrated pipe string which has water injection function and is compatible with backwashing well function, and an outer layer sand control pipe string which has independent screen pipe type sand control function; Theinner-layer set seal inspection and backwashing integrated pipe string is arranged in the blind pipe of the outer sand control pipe string, and the upper part of the screen pipe is connected with thestandard oil pipe, and the outer part is connected with the release packer of the outer sand control pipe string, and the release packer and the release packer form an integral whole through the cablesuspension release sealing