Screw pump flow string anti-disengaging device

• Main Authors: ZHANG TAO, WANG LIN, QU LIN, JIA YIYONG, HE XIAOHONG, SONG GUANGLONG, SUN JIE, JIANG GUIPING
• Format: Patent
• Language: English
• Published: 14.01.2015
• 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 screw pump flow string anti-disengaging device. The screw pump flow string anti-disengaging device comprises a cone and an inner tube connected with the cone through threads. A trip and a tile support are arranged on the outer side of the inner tube. A protective cover is arranged on the outer side of the trip. A disc spring is arranged between the protective cover and the trip and buckled with the cone through an O-shaped seal ring. The lower end of the protective cover is provided with an anti-disengaging steel plate. The anti-disengaging steel plate is connected with the strip through a supporting guide rail. The supporting guide rail is inclined. Limiting threads are arranged at the lateral end of the supporting guide rail. A buffer spring is arranged at the bottom end of the tile support. The bottom end of the buffer spring is fixed through a positioning steel plate. A pressure reduction flat gasket is arranged between the buffer spring and the positioning steel plate. The screw pump flow string anti-disengaging device is simple in structure and convenient to use, does not bend an oil tube, and reduces damage to the oil tube and a sucker rod.