Sleeve protection device

• Main Authors: CHANG XIN, WEI KAI, WAN YANGHUI, WANG XINGYI, JIANG YUN, YAN LIANGZHU
• Format: Patent
• Language: Chinese; English
• Published: 10.11.2023
• 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 cannula protection device which comprises an inner protection tube, an adjusting mechanism, a protection bag and an outer protection tube. The adjusting mechanism comprises a plurality of first rotating blocks and a plurality of second rotating blocks; the protective bag comprises a plurality of vertical bag bodies which are communicated with one another; and the outer protective tube is sleeved outside the protective bag. The device has the beneficial effects that when the protection bag is extruded, the liquid A in the protection bag is extruded into the branch bag bodies, the branch bag bodies enable the included angles between the first rotating blocks and the corresponding second rotating blocks to be increased, and therefore the liquid B in the outer protection pipe is compressed to increase the pressure in the outer protection pipe, and finally when the protection bag is extruded to be broken, the liquid A in the protection bag is extruded to be broken. When the sleeve is in u