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. Oil well production equipment including a downhole production string and a pump motor lead protector comprising:
a receiving facility interconnected with the production string;
the production string including a pumping unit and tubing inserted in a casing;
the pumping unit including a pump and a pump motor for pumping oil through the tubing;
a pump motor lead for supplying electrical power to the pump motor;
a head guard and a trailing guard for protecting the pump motor lead in an annulus between the casing and the pumping unit which is a smaller annulus than an annulus between the casing and the tubing;
a head guard tapered end opposite a head guard mouth and an interior space of the head guard for receiving the pump motor lead;
the trailing guard for joining with the head guard at the mouth and for receiving the pump motor lead from the head guard and for covering the pump motor lead alongside the pumping unit; and,
a band for encircling the production string such that the band passes through opposed sidewall slots of the trailing guard to fix the trailing guard to the production string.
2. The equipment of claim 1 wherein the head guard receives the pump motor lead from an exit in a side of the pump motor.
3. The equipment of claim 2 wherein the tubing is attached to a pump outlet.
4. The equipment of claim 2 wherein the head guard mouth is a box mouth.
5. The equipment of claim 2 wherein the trailing guard has an open cross section.
6. The equipment of claim 1 further comprising:
within a trailing guard interior, the pump motor lead is between the band and an assembled pump and pump motor; and,
within the trailing guard interior, a protective clearance is between the band and the motor lead;
wherein the protective clearance protects the pump motor lead from damaging contact with the band.
7. A method for protecting oil well production equipment including a downhole production string and a pump motor lead protector:
providing a receiving facility interconnected with the production string that includes a pumping unit and tubing inserted in a casing, the pumping unit including a pump and a pump motor for pumping oil through the tubing;
supplying the pump motor with electric power via a pump motor lead;
protecting the pump motor lead with a head guard having a wedge-shaped nose and a trailing guard having an “n” shaped cross-section, the head guard and the trailing guard joined where the trailing guard is inserted in a mouth of the head guard;
covering the pump motor lead with the head guard and the trailing guard to protect the pump motor lead in an annulus between the casing and the pumping unit that is smaller than an annulus between the casing and the tubing;
encircling the production string with a band that passes through opposed sidewall slots of the trailing guard to fix the trailing guard to the production string.
8. The method of claim 7 wherein the head guard receives the pump motor lead from an exit in a side of the pump motor.
9. The method of claim 7 wherein the tubing is attached to a pump outlet.
10. The method of claim 7 further comprising the steps of:
within a trailing guard interior, inserting the pump motor lead between the band and an assembled pump and pump motor; and,
within the trailing guard interior, providing a protective clearance between the band and the motor lead;
wherein the protective clearance protects the pump motor lead from damaging contact with the band.