Low profile pump motor lead protector
View Patent ↗A low profile pump motor lead protector with a head guard and a trailing guard, the head guard including a front section with a front end and a rear section with a rear end, the trailing guard having a pin end for insertion in a head guard socket, the lead protector for protecting a motor lead of a pump and motor assembly of a downhole production string for surfacing fluid from a reservoir such as a subterranean oil well.
1. A method of protecting a motor electric supply, the method comprising the steps of:
providing a downhole casing in an oil well;
providing a production assembly including a tubing string coupled to an electric motor via a pump interposed between the tubing and the motor;
providing a motor electric power supply via a motor lead extensible along an outer periphery of the production assembly and extensible between a surface location and the electric motor;
installing the production assembly in the casing to ready the well for production, the tubing and the casing having a first substantially annular gap therebetween, the casing and the pump having a second substantially annular gap therebetween, and the casing and the motor having a third substantially annular gap therebetween, the first substantially annular gap being larger than the second and third substantially annular gaps;
producing the oil well by providing electric power to the motor to operate the pump;
recovering the pump to the surface; and,
during the installation and recovery operations, guarding the motor lead from damage threatened by relative motion of the motor lead with respect to the casing via a lead covering motor lead guard that continuously covers at least a portion of the motor lead;
wherein the motor lead guard includes a motor mounted head guard and a pump mounted trailing guard, an end of the trailing guard is received by a head guard socket, the head guard is affixed to the motor via bolts and the trailing guard is affixed to the pump via a pump encircling band that passes through opposed trailing guard sidewall slots such that the band crosses the motor lead a) without squeezing the motor lead between the band and the pump and b) without squeezing the motor lead between the band and the trailing guard.
2. The method of claim 1 wherein a head guard rear section is depressed with respect to a head guard front section, the head guard rear section defines a ventral curved surface mating with a pump exterior, and the socket is flanked by flanges with bolt holes.