Process pumps and related methods of treating a process line

Patent metadata

Field	Value
Publication number	US-12378954-B2
Application number	US-202217937687-A
Country	US
Kind code	B2
Filing date	Oct 3, 2022
Priority date	Oct 3, 2022
Publication date	Aug 5, 2025
Grant date	Aug 5, 2025

Abstract

A method of treating a fluid within a process line includes flowing a treatment chemical and a first volume of the fluid into an injection chamber of a process pump, exerting an upward force on a lower cylinder of a piston of the process pump with a mixture of the treatment chemical and the first volume of the fluid within the injection chamber, exerting a downward force on an upper cylinder of the piston with a second volume of the fluid, and transmitting the downward force to the lower cylinder of the piston to force the mixture out of the injection chamber and into the process line.

First claim

What is claimed is:

1. A method of treating a fluid within a process line, the method comprising:
flowing a treatment chemical and a first volume of the fluid into an injection chamber of a process pump;
exerting an upward force on a lower cylinder of a piston of the process pump with a mixture of the treatment chemical and the first volume of the fluid within the injection chamber;
exerting a downward force on an upper cylinder of the piston with a second volume of the fluid within a pumping chamber, the upper cylinder being separate from and spaced axially apart from the lower cylinder;
while the downward force is exerted on the upper cylinder, lengthening a positioning spring attached to the upper cylinder from a collapsed configuration to an extended configuration; and
transmitting the downward force to the lower cylinder of the piston to force the mixture out of the injection chamber and into the process line.

2. The method of claim 1 , further comprising:
forcing a third volume of the fluid within the pumping chamber into a relief line; and
flowing the third volume of fluid into an outlet line.

3. The method of claim 1 , further comprising flowing the second volume of fluid into the pumping chamber.

4. The method of claim 1 , wherein the positioning spring is attached to an upper surface of the upper cylinder, and wherein the positioning spring is located within the pumping chamber.

5. The method of claim 1 , further comprising reducing an upper volume of an upper pressure transmission chamber adjacent the upper cylinder.

6. The method of claim 5 , further comprising increasing a lower volume of a lower pressure transmission chamber adjacent the lower cylinder.

7. The method of claim 6 , further comprising flowing a pressure transmission fluid from the upper transmission chamber to the lower transmission chamber through a conduit that extends directly from the upper transmission chamber to the lower pressure transmission chamber.

8. The method of claim 7 , wherein the pressure transmission fluid comprises oil.

9. The method of claim 1 , further comprising automatically actuating two or more valves that are in fluid communication with the process pump.

10. The method of claim 1 , further comprising simultaneously actuating two or more valves that are in fluid communication with the process pump.

11. The method of claim 1 , wherein the lower cylinder is located below the pumping chamber, and wherein the upper cylinder is located above the injection chamber.

Assignees

• Saudi Arabian Oil Co

Inventors

• Khayyat Omar Wadea Mohammed

Classifications

• C10G29/04 Primary

  Metals, or metals deposited on a carrier · CPC title

• E21B43/267

  reinforcing fractures by propping · CPC title

• F04B5/02

  with double-acting pistons · CPC title

• F04B9/113 Primary

  reciprocating movement of the pumping members being obtained by a double-acting liquid motor · CPC title