Echo velocity measurements without using recessed ultrasonic transceiver

Patent metadata

Field	Value
Publication number	US-10947838-B2
Application number	US-201916582847-A
Country	US
Kind code	B2
Filing date	Sep 25, 2019
Priority date	Oct 16, 2018
Publication date	Mar 16, 2021
Grant date	Mar 16, 2021

Abstract

A system for determining a borehole shape may comprise a measurement assembly, wherein the measurement assembly may comprise a housing with an outer surface, a transducer disposed flush along the outer surface of the housing, and an extruded boss that connects to the outer surface of the housing. A method may comprise disposing a downhole tool that includes an instrument section into a wellbore and transmitting an excitation from the transducer into the wellbore, wherein the excitation is reflected off a wellbore wall as an echo.

First claim

What is claimed is:

1. A system comprising:
a measurement assembly, wherein the measurement assembly comprises:
a housing having a circumference that forms an outer surface;
a transducer disposed flush along the outer surface of the housing; and
an extruded boss having an inner circumference that forms an inner surface which is in contact with the entire circumference of the outer surface of the housing.

2. The system of claim 1 , further comprising a sensor disposed on the extruded boss.

3. The system of claim 2 , wherein the sensor is configured to detect contact between a wellbore wall and the sensor.

4. The system of claim 1 , wherein the extruded boss is connected to the outer surface of the housing no more than two feet above the transducer.

5. The system of claim 4 , wherein the extruded boss connects above the transducer.

6. The system of claim 4 , wherein the extruded boss connects below the transducer.

7. The system of claim 1 , wherein the extruded boss extends at least a quarter-inch from the outer surface of the housing.

8. The system of claim 1 , wherein the extruded boss is a stabilizer.

9. The system of claim 8 , wherein the stabilizer includes one or more channels.

10. The system of claim 9 , wherein the stabilizer is configured to center the measurement assembly in a wellbore.

11. A method comprising:
disposing a downhole tool that includes an instrument section into a wellbore, wherein the instrument section comprises:
a housing having a circumference that forms an outer surface;
a transducer disposed flush along the outer surface of the housing; and
an extruded boss having an inner circumference that forms an inner surface which is in contact with the entire circumference of the outer surface of the housing; and

transmitting an excitation from the transducer into the wellbore, wherein the excitation is reflected off a wellbore wall as an echo.

12. The method of claim 11 further comprising a sensor disposed on the extruded boss.

13. The method of claim 12 , wherein the sensor is configured to detect contact between the wellbore wall and the sensor.

14. The method of claim 11 , determining an echo velocity with V echo =DminTmin2, wherein D min , is a distance from the transducer to the wellbore wall and T min is an echo travel time.

15. The method of claim 11 , wherein the extruded boss is connected to the outer surface of the housing no more than two feet above the transducer.

16. The method of claim 15 , wherein the extruded boss connects above the transducer or below the transducer.

17. The method of claim 11 , wherein the extruded boss extends at least a quarter-inch from the outer surface of the housing.

18. The method of claim 11 , wherein the extruded boss is a stabilizer.

19. The method of claim 18 , wherein the stabilizer includes one or more channels.

20. The method of claim 19 , wherein the stabilizer is configured to center the instrument section in a wellbore.

Assignees

• Halliburton Energy Services Inc

Inventors

• Chang Chung
• Weng Yu
• Li Peng
• Li Ziyang
• Marlow Rodney

Classifications

• G01P5/241

  by using reflection of acoustical waves, i.e. Doppler-effect · CPC title

• E21B47/085 Primary

  using radiant means, e.g. acoustic, radioactive or electromagnetic · CPC title

• E21B47/00

  Survey of boreholes or wells (monitoring pressure or flow of drilling fluid E21B21/08) · CPC title

• E21B1/00 Primary

  Percussion drilling · CPC title

• E21B47/01

  Devices for supporting measuring instruments on drill bits, pipes, rods or wirelines; Protecting measuring instruments in boreholes against heat, shock, pressure or the like · CPC title