Speed string double-seal suspension method and device

• Main Authors: CHEN YONG, YANG XUDONG, YANG DANDAN, WEI YAMING, BAI XIAOHONG, LIU DANDAN, TIAN WEI, WANG XIAORONG, ZHAO BINBIN, HAN QIANGHUI
• Format: Patent
• Language: Chinese; English
• Published: 11.06.2021
• 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 provides a speed string double-seal suspension method and device. The speed string double-seal suspension method comprises the steps that S1, main suspension and main sealing of a speed string are conducted, specifically, after the speed string is tripped into a shaft by a preset depth, first suspension of the speed string is achieved by putting a main suspension slip on a hanger body, and a sealing rubber sleeve is compressed by screwing a lower jackscrew to realize main sealing; and S2, auxiliary suspension and auxiliary sealing of the speed string are conducted, specifically, an auxiliary suspension slip is put on the main suspension slip to achieve second suspension of the speed string, a plurality of sealing rings are arranged on a centralizing sleeve in a sleeving mode, then the centralizing sleeve is inserted into an upper end opening of the speed string, the sealing rings arranged on the centralizing sleeve in the sleeving mode are pressed between the outer wall of the centralizing sleev