Interactive and/or secure activation of a tool

• US 7,383,882 B2
• Filed: 02/15/2002
• Issued: 06/10/2008
• Est. Priority Date: 10/27/1998
• Status: Expired due to Term

• Current Assignee: Schlumberger Technology Corporation (SLB)
• Original Assignee: Schlumberger Technology Corporation (SLB)
• Inventors: Lerche, Nolan C., Brooks, James E., Farrant, Simon L., Rogers, Edward H.
• Primary Examiner(s): Singh; Sunil
• Application Number:
  US10/076,993
• Publication Number:
  US 20020088620A1
• Time in Patent Office: 2,307 Days
• Field of Search: 166/297, 166/66, 166/250.01, 166/55.1, 166/381, 166/65.1
• US Class Current: 166/250.01
• CPC Class Codes: E21B 41/00 Equipment or details not covered by groups E21B15/00 - E21B40/00
• CPC Class Codes: E21B 41/0021 Safety devices, e.g. for preventing small objects from falling into the borehole
• CPC Class Codes: E21B 43/1185 Ignition systems
• CPC Class Codes: E21B 43/11857 firing indication systems
• CPC Class Codes: E21B 43/119 Details, e.g. for locating perforating place or direction
• CPC Class Codes: E21B 47/12 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 Class Codes: F42D 1/05 Electric circuits for blasting

Abstract

A tool activation system and method includes receiving an authorization code of a user to verify access rights of a user to activate the tool. In one example, the authorization code is receive from a smart card. The environment around the tool, which can be in a wellbore, for example, is checked. In response to the authorization code and the checking of the environment, activation of the tool is enabled.

Claims

1. A method of controlling activation of a well tool located downhole in a well, comprising:

checking, at a surface unit located at an earth surface, an authorization code of a user to verify that the user has access to activate the well tool;

receiving, at the surface unit, data pertaining to a downhole environment around the well tool that is located downhole in the well; and

the surface unit enabling activation of the well tool in response to the authorization code and the data indicating that the downhole environment around the well tool meets predetermined one or more criteria for activation of the well tool, and

the surface unit disabling activation of the well tool in response to the data indicating that the downhole environment does not meet the predetermined one or more criteria.

2. The method of claim 1, further comprising:

receiving a user command to activate the well tool; and

sending an activate command to the well tool if activation of the well tool is enabled.

3. The method of claim 2, wherein sending the activate command comprises sending an encrypted activate command.

4. The method of claim 3, further comprising the well tool decrypting the encrypted activate command.

5. The method of claim 4, wherein decrypting the encrypted activate command is performed using a key stored in the well tool.

6. The method of claim 1, further comprising receiving the authorization code of the user from information stored on a smart card.

7. The method of claim 6, wherein receiving the authorization code further comprises receiving a personal identification number code from the user in addition to the information stored on the smart card.

8. The method of claim 6, wherein receiving the information stored on the smart card comprises receiving a digital signature from the smart card.

9. The method of claim 1, further comprising:

providing sensors in the well tool; and

communicating data indicating the downhole environment from the sensors to the surface unit.

10. The method of claim 9, wherein the well tool contains an explosive, the method further comprising providing additional sensors at a well surface to detect detonation of the explosive.

11. The method of claim 1, further comprising receiving a command to activate the well tool from a remote site.

12. The method of claim 11, wherein receiving the command from the remote site comprises receiving the command over a wireless link.

13. The method of claim 12, wherein receiving the command over the wireless link comprises receiving the command over a radio frequency link.

14. The method of claim 1, wherein the well tool comprises an explosive, the method further comprising:

receiving a user request to arm the well tool,

wherein enabling activation of the well tool comprises arming the well tool.

15. The method of claim 14, further comprising:

receiving a user request to activate the well tool;

performing another check of the data pertaining to the environment around the well tool; and

in response to the user request to activate the well tool and performing another check of the data pertaining to the environment, sending one or more commands to activate the tool.

16. The method of claim 1, wherein receiving data pertaining to the downhole environment around the well tool comprises receiving data pertaining to a depth of the well tool downhole in the well;

and

wherein enabling activation of the well tool is in response to the authorization code and the data pertaining to the depth of the well tool.