Bottom catch barrel

• Main Authors: SHAN MAOQING, JIA ZHENGFA, XIA ZIYI, WU YINGXIN, WANG JIANG, HU YONGXIONG
• Format: Patent
• Language: English
• Published: 01.10.2014
• 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 utility model discloses a bottom catch barrel. The bottom catch barrel comprises an upper connector and a lower connector, wherein the upper connector is connected with the lower connector through two-grade locking threads to form the catch barrel main body, the upper end of the catch barrel main body is connected with a washover pipe, the lower end of the catch barrel main body is connected with a mill shoe, the inner wall of the middle part of the lower connector is gradually retracted inwards from top to bottom to form a conical surface, the conical surface is provided with a cylindrical clamping tile, and the outer diameter of the cylindrical clamping tile is greater than the diameter of the bottom of the conical surface. The milling clearing annular property of the washover pipe is integrated with the catch and invert buckling function of the catch barrel, so that the washover, bottom catching and invert buckling integrated operation of a severely-corroded tubular column and sand buried and contaminant clamped tubular column can be realized, the construction procedure is reduced, the construction period is shortened, and the economic benefit is increased.