Downhole Formation Testing Tool

• US 20070215349A1
• Filed: 02/14/2007
• Published: 09/20/2007
• Est. Priority Date: 06/29/2004
• Status: Active Grant

• Current Assignee: Schlumberger Technology Corporation (Schlumberger NV)
• Original Assignee: Schlumberger Technology Corporation (Schlumberger NV)
• Inventors: Reid, Lennox, Harrigan, Edward
• Granted Patent: US 7,303,011 B2
• Time in Patent Office: Days
• US Class Current: 166/264
• CPC Class Codes: E21B 49/04 using explosives in boreholes; using projectiles penetrating the wall
• CPC Class Codes: E21B 49/06 using side-wall drilling tools pressing or scrapers
• CPC Class Codes: E21B 49/10 using side-wall fluid samplers or testers

Abstract

A downhole tool positionable in a wellbore penetrating a subterranean formation is disclosed. The downhole tool includes a housing, a coring bit and a sample chamber. The coring bit is disposed in the housing and is extendable therefrom for engaging a wellbore wall. The sample chamber stores at least two formation samples obtained with the coring bit and includes at least two portions for separately storing the formation samples.

Claims

1. A downhole tool positionable in a wellbore penetrating a subterranean formation, the subterranean formation having a formation fluid therein, comprising:

a housing;

a coring bit disposed in the housing, the bit being extendable from the housing for engaging a wellbore wall; and

a sample chamber for storing at least two formation samples obtained with the coring bit, wherein the sample chamber includes at least two portions for separately storing the formation samples.

2. The downhole tool of claim 1, wherein the sample chamber is fluid coupled to a flowline providing sample fluid obtained from the formation.

3. The downhole tool of claim 1, wherein the sample chamber includes an elongate hollow shaft and a plurality of gates for opening and closing the portions of sample chamber.

4. The downhole tool of claim 3, wherein the gates are actuatable.

5. A sample storage assembly for a downhole coring tool positionable in a wellbore penetrating a subterranean formation, the subterranean formation having a formation fluid therein, comprising:

a first portion for receiving a first sample; and

a second portion for receiving a second sample, wherein the first and second samples are selectively isolated.

6. The sample storage assembly of claim 5, wherein the first and second portions at least partially define a sample chamber.

7. The sample storage assembly of claim 5, wherein the first portion includes at least one gate for providing and restricting access of the first sample to the first portion.

8. The sample storage assembly of claim 7, wherein the at least one gate is a gate valve.

9. The sample storage assembly of claim 7, wherein the second portion includes at least one gate for providing and restricting access of the second sample to the second portion

10. The sample storage assembly of claim 9, wherein the at least one gate of the first and the second portion define opposing ends of the second portion.

11. A method of storing a plurality of samples obtained from a subterranean formation in a downhole tool positionable in a wellbore penetrating the subterranean formation, the method comprising:

removing a first sample from a coring bit;

placing the first sample into an opening defining an entrance into a storage assembly;

sealing the first sample in a first portion of the storage assembly;

removing a second sample from a coring bit;

placing the second sample into the opening; and

sealing the second sample in a second portion of the storage assembly, wherein the first and second samples are isolated from each other.

12. The method of claim 11, wherein sealing the first sample includes sealing a first portion of the storage assembly near a second end of the first sample.

13. The method of claim 12, wherein sealing the portion of the storage assembly near the second end of the first sample further includes sealing a first end of the second portion of the storage assembly.

14. The method of claim 11, further including traversing the first sample through the second portion of the storage assembly before arriving at the first portion.

15. A method of storing a plurality of samples obtained from a subterranean formation in a downhole tool positionable in a wellbore penetrating the subterranean formation, the method comprising:

placing a first sample into a first portion of a storage assembly, the first portion having a first end and a second end;

sealing the second end of the first portion, thereby defining a first end of a second portion; and

placing a second sample into the second portion of the storage assembly.

16. The method of claim 15, further including sealing a second end of the second portion thereby sealing the second sample in the second portion.

17. The method of claim 15, further including traversing the first sample through the second portion of the storage assembly before arriving at the first portion.