Recording device for measuring downhole parameters

Patent metadata

Field	Value
Publication number	US-11293275-B2
Application number	US-201916401305-A
Country	US
Kind code	B2
Filing date	May 2, 2019
Priority date	May 4, 2018
Publication date	Apr 5, 2022
Grant date	Apr 5, 2022

Abstract

A downhole recording device includes a housing centralizer, a housing, at least one radial connector connecting the housing to the housing centralizer, and an annular space between the housing centralizer and housing. The housing centralizer has a first end and a second end with a longitudinal opening through the housing centralizer from the first end to the second end. The housing is positioned radially within the longitudinal opening. The housing is configured to receive a downhole sensor. The annular space is located in the longitudinal opening of the housing centralizer and allows fluid communication from the first end of the housing centralizer to the second end of the housing centralizer.

First claim

What is claimed is:

1. A downhole recording device, comprising:
a housing centralizer having a first end and a second end, the housing centralizer having an annular shape and defining an annular space therein;
a chassis positioned radially within the annular space, the chassis connected to the housing centralizer by at least one radial connector, the chassis including a sensor mounting portion, wherein the at least one radial connector is attached to the chassis and to the housing centralizer by an attachment mechanism comprising: a weld, a braze, a mechanical fastener, a cast one piece connection, a molded one piece connection, a machined one piece connection, or any combination thereof; and
the annular space radially between the housing centralizer and the chassis, the annular space extending axially through the housing centralizer and allowing fluid communication through the first end to the second end of the housing centralizer.

2. The device of claim 1 , the chassis including at least one downhole sensor coupled to the sensor mounting portion.

3. The device of claim 1 , the housing centralizer including an end bevel.

4. The device of claim 1 , the at least one radial connector including a plurality of radial connectors, the plurality of radial connectors being rotationally balanced around the chassis.

5. The device of claim 1 , the at least one radial connector being thicker adjacent the chassis than adjacent the housing centralizer.

6. A downhole tool, comprising:
a downhole tool having a central bore; and
a downhole recording device positioned in the central bore and positioned entirely longitudinally within the downhole tool, the downhole recording device including:
a housing centralizer having an inner surface and an outer surface extending from a first end to a second end, the inner surface defining an annular space, and the outer surface is generally cylindrical and interfaces with the central bore;
a housing positioned radially within the annular space, the housing including a sensor mounting portion and being connected to the inner surface of the housing centralizer by at least one connector; and
the annular space radially between the housing centralizer and the housing, the annular space allowing fluid communication through the first end to the second end of the housing centralizer.

7. The downhole tool of claim 6 , the at least one connector being rotatable relative to the housing centralizer about a longitudinal axis.

8. The downhole tool of claim 6 , the housing having a removable sealing member with a rounded top section at a housing first end.

9. The downhole tool of claim 6 , the downhole tool having an occlusion percentage of less than 30%.

10. The downhole tool of claim 6 , wherein the at least one connector is attached to the housing and to the housing centralizer by an attachment mechanism comprising: a weld, a braze, a mechanical fastener, a cast one piece connection, a molded one piece connection, a machined one piece connection, or any combination thereof.

11. A system for measuring downhole parameters, comprising:
a bit having a central bore and a rotational axis, the central bore being generally cylindrical and having an inside surface with a first bore diameter; and
a downhole recording device positioned in the central bore, the downhole recording device including:
a housing centralizer secured to the bit in the central bore, wherein the housing centralizer is positioned entirely longitudinally within the bit, wherein the housing centralizer comprises:
an outer surface having an outer diameter that interfaces with the first bore diameter of the central bore, wherein the outer surface is generally cylindrical; and
an inner surface defining an annular space;

a housing connected to the inner surface of the housing centralizer using at least one radial connector, the housing including a chassis and at least one sensor coupled to the chassis; and
the annular space located radially between the housing centralizer and the housing, with the at least one radial connector positioned in the annular space, wherein the annular space allows fluid communication through the downhole recording device and into the central bore.

12. The system of claim 11 , the housing having a sealing member on a first end, and being closed on a second end.

13. The system of claim 11 , the housing including a resilient member between a sealing member and the at least one sensor.

14. The system of claim 11 , the housing centralizer including at least one locking feature rotationally locking the housing centralizer with respect to the central bore.

15. The system of claim 11 , wherein the outer surface of the housing centralizer comprises a pin thread secured to a box thread on the inside surface of the central bore with the first bore diameter.

16. The system of claim 11 , the housing centralizer being secured to the bit with a mechanical connector.

17. The system of claim 11 , the bit including a bit head connected to a pin, the housing centralizer being connected to the bit by compression between the bit head and the pin.

18. The system of claim 11 , the housing centralizer being secured to the bit using a retaining ring at an uphole end of the bit.

19. The system of claim 11 , the housing centralizer including at least one sealing ring between the housing centralizer and the central bore.

20. The system of claim 11 , the inside surface of the central bore having a first section with the first bore diameter and a second section having a second bore diameter that is less than the first bore diameter, wherein an inner diameter of an inner surface of the housing centralizer is the same as the second bore diameter, and the second section is downhole of the first section.

Assignees

• Smith International
• Schlumberger Technology Corp

Inventors

• Zhang Pusheng
• Cherel Audrey
• Yang Baozhong

Classifications

• E21B47/26

  Storing data down-hole, e.g. in a memory or on a record carrier · CPC title

• E21B47/017 Primary

  Protecting measuring instruments · CPC title

• E21B17/10

  Wear protectors; Centralising devices {, e.g. stabilisers} · CPC title

• E21B47/12

  Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling · CPC title

• E21B41/00

  Equipment or details not covered by groups E21B15/00 - E21B40/00 · CPC title