Magnetic anti-gas lock rod pump

Patent metadata

Field	Value
Publication number	US-9915256-B2
Application number	US-201514599002-A
Country	US
Kind code	B2
Filing date	Jan 16, 2015
Priority date	Feb 17, 2014
Publication date	Mar 13, 2018
Grant date	Mar 13, 2018

Abstract

A well pump has a standing valve seat with a standing valve mounted in a lower end of a barrel. A plunger is carried within the barrel for axial stoking movement. A travelling seat with a travelling valve are mounted in a lower end of the plunger. The travelling valve has a head that lands on the travelling valve seat while the travelling valve is in a closed position. The travelling valve has a stem extending downward from the head through a hole in the travelling seat. The stem is a permanent magnet. Another permanent magnet is carried by the barrel below the travelling magnet. The polarities of the magnets are configured to interact and cause the travelling valve to lift relative to the travelling seat to an open position as the plunger nears a bottom of a stroke.

First claim

The invention claimed is:

1. A well pump assembly, comprising:
a barrel having an axis and adapted to be suspended in a well;
a standing valve seat mounted in the barrel;
a standing valve that is movable relative to the standing valve seat between a closed position and an open position;
a plunger carried within the barrel for axial stoking movement;
a travelling valve seat mounted in a lower end of the plunger;
a travelling valve that is movable relative to the travelling valve seat between a lower closed position during up stroke movement of the plunger and an upper open position during down stroke movement of the plunger;
a travelling magnet carried by the travelling valve for movement therewith relative to the travelling valve seat, the travelling magnet having a travelling magnetic pole of selected polarity; and
a standing magnet carried by the barrel in a location below the travelling magnet, the standing magnet having a standing magnetic pole of the same polarity as the travelling magnetic pole to create a repelling force between the travelling magnetic pole and the standing magnetic pole that pushes the travelling valve to the open position as the plunger approaches the bottom of the down stroke movement.

2. The assembly according to claim 1 , wherein:
the travelling valve comprises a head and a stem, the stem extending downward from the head through a hole in the travelling valve seat, the head being landed on the travelling valve seat while in the closed position; and
wherein the stem comprises the travelling magnet.

3. The assembly according to claim 1 , wherein:
the travelling valve comprises a head and a stem, the stem extending downward from the head through a hole in the travelling valve seat, the head being landed on the travelling seat while in a closed position; and
the stem comprises the travelling magnet, and the travelling magnetic pole is at a lower end of the stem.

4. The assembly according to claim 1 , wherein:
the travelling valve comprises a head and a stem, the stem extending downward from the head through a hole in the travelling valve seat, the head being landed on an upper side of the travelling valve seat while in a closed position;
the travelling valve seat is formed of a non magnetic material; and
the stem comprises the travelling magnet, and the travelling magnetic pole is at a lower end of the stem.

5. The assembly according to claim 1 , wherein:
the standing magnet is carried by the standing valve for movement therewith between the open and closed positions.

6. The assembly according to claim 1 , wherein:
the travelling valve comprises a travelling valve head and a travelling valve stem, the travelling valve stem extending downward from the head through a hole in the travelling valve seat, the travelling valve head being landed on an upper side of the travelling valve seat while in a closed position;
the travelling valve seat is formed of a non magnetic material;
the travelling valve stem comprises the travelling magnet, the travelling magnetic pole being at a lower end of the travelling valve stem;
the standing valve comprises a standing valve head and a standing valve stem, the standing valve stem extending downward from the standing valve head through a hole in the standing valve seat, the standing valve head being landed on an upper side of the standing valve seat while in a closed position;
the standing valve seat is formed of a non magnetic material; and
the standing valve stem comprises the standing magnet, the standing magnetic pole being at the standing valve head of the standing valve.

7. A well pump assembly, comprising:
a barrel having an axis and adapted to be suspended in a well;
a standing valve seat mounted in a lower end of the barrel;
a standing valve carried on the standing valve seat and being axially movable relative to the standing valve seat between an upper open position, which admits well fluid into the barrel, and a lower closed position, which blocks downward flow out of the barrel;
a plunger carried within the barrel for axial stoking movement between a down stroke movement and an up stroke movement;
a travelling valve seat mounted in a lower end of the plunger, the travelling valve seat having a hole therethrough;
a travelling valve having a travelling valve head that lifts above the travelling valve seat to an upper open position during the down stroke movement to admit well fluid into the plunger and lands on the travelling valve seat in a lower closed position during the up stroke movement, the travelling valve having a travelling valve stem extending downward from the travelling valve head through the hole, the stem comprising a travelling magnet with a travelling magnetic pole on a lower end of the travelling valve stem; and
a standing magnet carried by the barrel at a location axially spaced below the travelling magnet, the standing magnet having a standing magnetic pole of the same polarity as the travelling magnetic pole to create a repelling force between the travelling magnetic pole and the standing magnetic pole while the plunger approaches the bottom of the down stroke movement that causes the travelling valve to lift relative to the travelling valve seat to the open position as the plunger nears the bottom of the down stroke movement.

8. The assembly according to claim 7 , wherein:
the standing magnet is movable with the standing valve between the open and closed positions.

9. The assembly according to claim 7 , wherein:
the standing valve comprises a standing valve head and a standing valve stem, the standing valve stem extending downward from the standing valve head through a hole in the standing valve seat, the standing valve head being landed on an upper side of the standing valve seat while in the closed position of the standing valve;
the standing valve stem comprises the standing magnet; and
the standing magnetic pole is at the standing valve head of the standing valve.

10. The assembly according to claim 7 , wherein:
the standing valve comprises a standing valve head and a standing valve stem, the standing valve stem extending downward from the standing valve head through a hole in the standing valve seat, the standing valve head being landed on an upper side of the standing valve seat while in the closed position of the standing valve;
the standing magnet forms a part of the standing valve and the standing magnetic pole is at the standing valve head; and
the standing valve stem has an outer diameter less than an inner diameter of the hole in the standing valve seat, enabling well fluid to flow through the hole in the standing valve seat in an annulus around the standing valve stem while the standing valve is in the open position.

11. The assembly according to claim 7 , wherein:
the travelling valve seat and the standing valve seat are formed of non magnetic material.

12. A method of pumping well fluid from a well, comprising:
(a) providing a reciprocating pump with a barrel, a standing valve mounted to the barrel, a travelling valve mounted to a plunger, with a travelling magnet carried by the travelling valve, the travelling magnet having a lower end with a travelling magnetic pole of selected polarity, and a standing magnet carried by the barrel below the plunger, the standing magnet having an upper end with a standing magnetic pole of the same polarity as the travelling magnetic pole;
(b) suspending the pump in the well;
(c) stroking the plunger downward in the barrel, causing the standing valve to move to a lower closed position and the travelling valve to move to an upper open position in response to well fluid contained in the barr

Assignees

• Baker Hughes Inc
• Baker Hughes A Ge Co Llc

Inventors

• Bebak Kenneth T
• Dearman Carroll Scott
• Gunter Shawn N

Classifications

• F04B53/1082

  magnetic · CPC title

• E21B43/127

  Adaptations of walking-beam pump systems · CPC title

• F04B53/102

  Disc valves · CPC title

• F04B7/0266

  the inlet and discharge means being separate members · CPC title

• F04B53/1005

  being formed by two closure members working in series · CPC title