Sealing water stop structure and sealing water stop method for overlapped section of water stop pipe nipple and deep well casing pipe

• Main Author: QIN LITAO
• Format: Patent
• Language: Chinese; English
• Published: 15.03.2024
• 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 relates to the technical field of deep well casing water stopping, in particular to a water stopping short section, a deep well casing overlapping section sealing water stopping structure and a water stopping method. The water stop short section comprises a vertically-arranged water stop sleeve, a plugging structure is arranged on the periphery of the water stop sleeve, a first rotational flow hole is formed in the position, corresponding to the upper portion of the plugging structure, of the side wall of the water stop sleeve, and an annular blocking arc block is fixed to the position, corresponding to the lower portion of the plugging structure, of the inner wall of the water stop sleeve. The device has the advantages that the structural design is simple and reasonable, the sealing and water stopping work of the upper part and the lower part of the casing can be quickly completed, and the well cementation time is greatly shortened; and the engineering quality is improved, and the drilling qual