Apparatus and method for storing core samples at high pressure

Patent metadata

Field	Value
Publication number	US-9874063-B2
Application number	US-201214369543-A
Country	US
Kind code	B2
Filing date	Dec 21, 2012
Priority date	Dec 30, 2011
Publication date	Jan 23, 2018
Grant date	Jan 23, 2018

Abstract

A sampling tool to sample core samples from a wellbore is disclosed. A core sampling storage module includes a pressure housing to store a plurality of core samples, a core tube within the pressure housing, the core tube to store a plurality of core samples drilled from a downhole formation, a pressure housing cover that is configured to be selectively rotated to an open position or a closed position, an activation mechanism to receive a command, and based on the command, open or close the pressure housing cover, a push rod to selectively install a plug to cover the core tube, wherein when the plug is installed the pressure housing maintains a pressure.

First claim

What is claimed is:

1. A core sampling storage module comprising:
a pressure housing to store a plurality of core samples;
a core tube within the pressure housing, the core tube to store a plurality of core samples drilled from a downhole formation and wherein the core tube has a single open end;
a pressure housing cover that is configured to be selectively rotated to an open position or a closed position;
an activation mechanism to receive a command, and based on the command, open the pressure house cover in response to a command to open the pressure housing cover and further to close the pressure housing cover in response to a command to close the pressure housing cover; and
a push rod to selectively install a plug to cover the core tube, wherein when the plug is installed the pressure housing maintains a pressure.

2. The core sampling storage module of claim 1 , further comprising: one or more heaters to apply heat to core samples in the core tube.

3. The core sampling storage module of claim 1 , further comprising:
one or more sensors configured to measure one or more of a temperature, a pressure, and an acceleration in a location of the core tube;
a memory to store one or more measured temperatures, pressures, and accelerations; and
a processor to receive a measurement from the one or more sensors and store the measurement from the one or more sensors in the memory.

4. The core sampling storage module of claim 1 , further comprising:
a plurality of disks to sealingly engage the walls of the core tube and separate core samples.

5. The core sampling storage module of claim 1 , further comprising:
a tubing to encase one or more core samples, wherein the tubing has a single open end;
a heater to heat at least a portion of the tubing, causing the tubing to conform to one core sample; and
a tamping piston to seal the tubing around each core sample.

6. The core sampling storage module of claim 5 , wherein the tubing is polytetrafluoroethylene (PTFE).

7. The core sampling storage module of claim 5 , wherein the tubing is polyether ether ketone (PEEK).

8. The core sampling storage module of claim 5 , wherein the tubing is polyether ether ketone (PEEK).

9. The core sampling storage module of claim 1 , further comprising:
a piston at the bottom of the core tube to maintain an axial load on the one or more core samples in the core tube.

10. The core sampling storage module of claim 1 , further comprising:
a bladder in the core tube to maintain a hydrostatic pressure on one or more core samples, wherein the bladder is selectively inflated.

11. The core sampling storage module of claim 1 , wherein the core tube is at least partially filled with nitrogen.

12. A method of sampling a plurality of sidewall core samples, the method comprising:
cutting a plurality of core sample from the sidewall of a well, wherein at least two of the core samples are from different locations in the well;
opening a pressure housing cover from a core tube to allow the core tube to be loaded with one or more core samples;
loading the core samples in the core tube within a pressure housing;
after the core samples are loaded in the core tube, plugging the core tube to maintain a pressure in the core tube; and
bringing the core samples to the surface.

13. The method of claim 12 , further comprising:
at least partially separating one or more core samples using a disc in the core tube.

14. The method of claim 12 , further comprising:
heating the core samples in the core tube to maintain the core samples at a desired temperature.

15. The method of claim 12 , further comprising:
measuring one or more of temperature, pressure, or acceleration of the core tube; and
logging the measured temperature, pressure, or acceleration in a memory.

16. The method of claim 15 , further comprising:
querying the memory to determine whether the core tube experienced excessive acceleration; and
determining when the core tube experienced the excessive acceleration.

17. The method of claim 12 , further comprising:
encasing one or more core samples in a tubing.

Assignees

• Halliburton Energy Services Inc

Inventors

• Arian Abbas
• Mackay Bruce
• Pelletier Michael
• Malone Michael
• Samec Wade

Classifications

• E21B25/08 Primary

  Coating, freezing, consolidating cores (E21B25/06 takes precedence); Recovering uncontaminated cores or cores at formation pressure · CPC title

• E21B25/00

  Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors (core bits E21B10/02) · CPC title

• E21B49/06

  using side-wall drilling tools {pressing} or scrapers · CPC title

• E21B27/00 Primary

  Containers for collecting or depositing substances in boreholes or wells, e.g. bailers, {baskets or buckets} for collecting mud or sand; Drill bits with means for collecting substances, e.g. valve drill bits · CPC title