US2025369330A1PendingUtilityA1

Generating pressure tube waves downhole using electrical pumping units safely

Assignee: HALLIBURTON ENERGY SERVICES INCPriority: May 30, 2024Filed: Jan 28, 2025Published: Dec 4, 2025

Est. expiryMay 30, 2044(~17.8 yrs left)· nominal 20-yr term from priority

Inventors:Madhur Kohli Zhijie Sun Derek Shelby Bale Erik Lee

F04B 49/20F04B 49/065F04B 17/03F04B 2203/0208F04B 2203/0209F04B 47/00F04B 49/06F04B 47/02E21B 47/20E21B 43/2607

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Claims

Abstract

A method for evaluating one or more properties of a wellbore. The method may include identifying a total power from all electric pump motors being used in a fracture operation, gradually reduce pump rates for one or more of the electric pump motors except for one or more selected electric pump motors. The method may further include gradually reduce the pump rate of the selected pump motors and stabilizing the pressure by holding the selected pump motors at a constant rate.

Claims

exact text as granted — not AI-modified

What is claimed is:

1 . A method comprising:
identifying a total power from one or more electric pump motors being used in a fracture operation; reducing a pump rate for one or more selected electric pump motors chosen from the one or more electric pump motors to a pre-selected pump rate; stabilizing a pressure in a wellbore by holding the one or more selected electric pump motors at a constant rate performing one or more test by dropping the pre-selected pump rate of the one or more selected electric pump motors to 0; and identifying a pressure pulse at surface for each of the one or more test.

2 . The method of claim 1 , wherein the one or more tests comprise changing a flow rate of at least one electric pump motor, neutralizing all of the one or more electric pump motors, opening at least one surface valve, or closing the at least one surface valve.

3 . The method of claim 1 , further comprising comparing the pressure pulse for each of the one or more tests.

4 . The method of claim 3 , identifying a selected pressure pulse from the comparing the pressure pulse for each of the one or more tests.

5 . The method of claim 1 , wherein the pre-selected pump rate is based at least in part on preventing electrical damage or interruption to a source of power connected to the one or more electric pump motors.

6 . The method of claim 1 , wherein the constant rate is held for a duration of 30 to 60 seconds.

7 . The method of claim 1 , further comprising a power source that is connected to the one or more electric pump motors.

8 . The method of claim 7 , wherein the power source is a generator or a grid.

9 . The method of claim 7 , further comprising maintaining the power source active during the one or more test.

10 . The method of claim 1 , wherein a change in the total power is create from the one or more test and the change in the total power is expressed as:

Change
⁢

in
⁢

power

fn
⁢

∑

i
x

⁢
R
⁢
P
⁢

M
i
2

where x is a number of electric pump motors, RPM=revolution per minute of each of the electric pump motors.

11 . A system comprising:
one or more electric pump motors configured for a fracture operation; an information handling system connected to the one or more electric pump motors and configured to:
identify a total power from the one or more electric pump motors;
reduce a pump rate for one or more selected pump motors chosen from the one or more electric pump motors to a pre-selected pump rate;
stabilize a pressure in a wellbore by holding the one or more selected electric pump motors at a constant rate
perform one or more test by dropping the pre-selected pump rate of the one or more selected electric pump motors to 0; and
identify a pressure pulse at surface for each of the one or more test.

12 . The system of claim 11 , wherein the information handling system is further configured to neutralize all of the one or more electric pump motors, open at least one surface valve, or close the at least one surface valve to change a flow rate of at least one electric pump motor.

13 . The system of claim 11 , wherein the information handling system is further configured to compare the pressure pulse for each of the one or more tests.

14 . The system of claim 13 , wherein the information handling system is further configured to identify a selected pressure pulse from the comparing the pressure pulse for each of the one or more tests.

15 . The system of claim 11 , wherein the pre-selected pump rate is based at least in part on preventing electrical damage or interruption to a source of power connected to the one or more electric pump motors.

16 . The system of claim 11 , wherein the constant rate is held for a duration of 30 to 60 seconds.

17 . The system of claim 11 , further comprising a power source that is connected to the one or more electric pump motors.

18 . The system of claim 17 , wherein the power source is a generator or a grid.

19 . The system of claim 17 , wherein the information handling system is further configured to maintain the power source active during the one or more test.

20 . The system of claim 11 , wherein a change in the total power is create from the one or more test and the change in the total power is expressed as: