Recording device for measuring downhole parameters

Patent metadata

Field	Value
Publication number	US-2019338630-A1
Application number	US-201916401305-A
Country	US
Kind code	A1
Filing date	May 2, 2019
Priority date	May 4, 2018
Publication date	Nov 7, 2019
Grant date	—

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 a longitudinal opening therein; a chassis positioned radially within the longitudinal opening, the chassis connected to the housing centralizer by at least one radial connector, the chassis including a sensor mounting portion; and an annular space in the longitudinal opening and radially between the housing centralizer and the chassis, the annular space allowing fluid communication from 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, the downhole recording device including:
a centralizer having a first end and a second end, the centralizer having a longitudinal opening therein;
a housing positioned radially within the longitudinal opening, the housing including a sensor mounting portion and being connected to the centralizer by at least one connector; and
an annular space in the longitudinal opening and radially between the centralizer and the housing, the annular space allowing fluid communication from 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 centralizer about a longitudinal axis.

8 . The downhole tool of claim 6 , the downhole recording device being entirely longitudinally within the downhole tool.

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

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

11 . A system for measuring downhole parameters, comprising;
a bit having a central bore and a rotational axis; a downhole recording device positioned in the central bore, downhole recording device including:
a housing centralizer secured to the bit in the central bore; and
a housing connected to the housing centralizer using at least one radial connector, the housing including a chassis and at least one sensor coupled to the chassis; and
an annular space located radially between the housing centralizer and the housing, with the at least one radial connector positioned in the annular space.

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 , the housing centralizer being generally cylindrical and the central bore being generally cylindrical, the housing having an outer diameter that forms a friction fit with an inner diameter of the central bore.

16 . The system of claim 11 , the housing centralizer including a pin thread secured to a box thread on an inside surface of the central bore.

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

18 . 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.

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

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

Assignees

• Smith International

Inventors

• Zhang Pusheng
• Cherel Audrey
• Yang Baozhong

Classifications

• E21B17/10

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

• E21B47/017

  Protecting measuring instruments · 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

• E21B47/011 Primary

  Fixed Constructions · mapped topic