Distributed Downhole Drilling Network

• US 20050035874A1
• Filed: 08/03/2004
• Published: 02/17/2005
• Est. Priority Date: 08/13/2003
• Status: Active Grant

• Current Assignee: IntelliServ, LLC (NOV, Inc.)
• Original Assignee: Intelliserv, Inc. (NOV, Inc.)
• Inventors: Hall, H. Tracy Jr., Hall, David R., Fox, Joe, Pixton, David S.
• Granted Patent: US 7,139,218 B2
• Time in Patent Office: Days
• US Class Current: 340/853.100
• 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: G01V 1/26 Reference-signal-transmitting devices, e.g. indicating moment of firing of shot
• CPC Class Codes: G01V 11/002 Details, e.g. power supply systems for logging instruments, transmitting or recording data, specially adapted for well logging, also if the prospecting method is irrelevant means for transmitting well survey signals E21B47/12; signal transmission systems in general G08C; transmission in general H04B

Abstract

A high-speed downhole network providing real-time data from downhole components of a drilling strings includes a bottom-hole node interfacing to a bottom-hole assembly located proximate the bottom end of a drill string. A top-hole node is connected proximate the top end of the drill string. One or several intermediate nodes are located along the drill string between the bottom-hole node and the top-hole node. The intermediate nodes are configured to receive and transmit data packets transmitted between the bottom-hole node and the top-hole node. A communications link, integrated into the drill string, is used to operably connect the bottom-hole node, the intermediate nodes, and the top-hole node. In selected embodiments, a personal or other computer may be connected to the top-hole node, to analyze data received from the intermediate and bottom-hole nodes.

Claims

1. A downhole network comprising:

a bottom-hole node interfacing to a bottom-hole assembly located proximate a bottom end of a drill string;

a top-hole node connected proximate a top end of the drill string;

an intermediate node located along the drill string between the bottom-hole node and the top-hole node, the intermediate node configured to receive and transmit data packets transmitted between the bottom-hole node and the top-hole node; and

a communications link, integrated in the drill string, operably connecting the bottom-hole node to the intermediate node, and the intermediate node to the top-hole node

wherein timing of at least two of the nodes is synchronized.

2. The downhole network of claim 1, further comprising a personal computer, operably connected to the top-hole node, for analyzing data received from the intermediate and bottom-hole nodes.

3. The downhole network of claim 2, wherein the personal computer comprises a user interface to display data received from the intermediate and bottom-hole nodes.

4. The downhole network of claim 1, wherein the bottom hole assembly includes components selected from the group consisting of a pressure sensor, an inclinometer, a temperature sensor, a thermocoupler, an accelerometer, an imaging device, and a seismic device.

5. The downhole network of claim 1, wherein the intermediate node functions as a repeater.

6. The downhole network of claim 1, wherein the intermediate node performs at least one task selected from the group consisting of signal amplification, filtering, error checking, routing, and switching.

7. The downhole network of claim 1, further comprising a module, housing the intermediate node, insertable at a point along the drill string.

8. The downhole network of claim 1, wherein the intermediate node is further configured to gather data from at least one of a downhole sensor and a downhole tool, located along the drill string, proximate the intermediate node.

9. The downhole network of claim 1, wherein at least one of the top-hole node, the intermediate node, and the bottom-hole node is assigned a unique network address.

10. The downhole network of claim 1, wherein the packets include a source address, identifying the source of a packet, and a destination address, identifying the destination of a packet.

11. The downhole network of claim 1, wherein the packets carry data originating from at least one of the group consisting of pressure sensors, inclinometers, temperature sensors, thermocouplers, accelerometers, imaging devices, and seismic devices.

12. A method for transmitting information along a drill string, the method comprising:

transmitting, from a bottom-hole node, a first data packet along a communications link integrated into the drill sting;

receiving, by an intermediate node located at an intermediate location along the drill string, and operably connected to the communications link, the first data packet;

amplifying, by the intermediate node, the first data packet; and

forwarding, by the intermediate node, the first data packet to a top-hole node operably connected to the communications link.

15. The method of claim 12, further comprising processing, by the intermediate node, the first data packet, wherein processing includes at least one task selected from the group consisting of filtering, error checking, routing, and switching.

16. The method of claim 12, further comprising housing the intermediate node in a module insertable at a point along the drill string.

17. The method of claim 12, wherein at least one of the top-hole node, the intermediate node, and the bottom-hole node is assigned a unique network address.

18. The method of claim 12, further comprising gathering, by the intermediate node, a second data packet containing data gathered from at least one of a downhole sensor and a downhole tool, located along the drill string, proximate the intermediate node.

19. The method of claim 18, wherein the first and second packets include a source address, identifying the source of the packet, and a destination address, identifying the destination of the packet.

20. The method of claim 18, wherein the first and second data packets carry data originating from at least one of the group consisting of pressure sensors, inclinometers, temperature sensors, thermocouplers, accelerometers, imaging devices, and seismic devices.

13. The method of claim 13, further comprising receiving, by a personal computer, the first data packet from the top-hole node, for analysis.

14. The method of claim 13, wherein the receiving, by a personal computer, further comprises displaying, on a user interface, data received from the intermediate and bottom-hole nodes.