FIELD: mining.
SUBSTANCE: downhole pipe string and cable disconnector comprises a sleeve and nipple with the central channel, bushing installed outside of the sleeve and the nipple with a possibility of axial movement, and scissors for cutting of de-energized cable, laid to downstream electric equipment. The sleeve and nipple are connected to each other by means of sealing rings and fixed with breaking pins. In the bushing the end-to-end slot is provisioned for cable, which is open from the side of the upper butt end of the bushing and dead-end in its bottom part with a sharp angle to the internal surface of the bushing, forming the bottom cutting edge. Meanwhile the outside cylindrical surface of the nipple is designed stepped with a ledge height, at least, equal to the cable thickness. Under the bottom cutting edge along the cylindrical surface of the nipple with a smaller diameter the electric cable is laid. The ledge is designed with undercut, forming a companion upper cutting edge of scissors, with a possibility of cable cutting at lifting the bush and the sleeve, connected by stop screws.
EFFECT: increase of efficiency and decrease of labour input of detaching and lifting from wells of suspended pipe strings.
1 dwg
