Universal downhole tool control apparatus and methods

• US 6,915,848 B2
• Filed: 07/30/2002
• Issued: 07/12/2005
• Est. Priority Date: 07/30/2002
• Status: Expired due to Term

• Current Assignee: Schlumberger Technology Corporation (SLB)
• Original Assignee: Schlumberger Technology Corporation (SLB)
• Inventors: Thomeer, Hubertus V., Kenison, Michael H., Xu, Zheng Rong, Adnan, Sarmad
• Primary Examiner(s): NEUDER, WILLIAM P
• Application Number:
  US10/208,462
• Publication Number:
  US 20040020643A1
• Time in Patent Office: 1,078 Days
• Field of Search: 166/250.11, 166/250.12, 166/387, 175/40
• US Class Current: 166/250.11
• CPC Class Codes: E21B 47/01 Devices for supporting measuring instruments on drill bits, pipes, rods or wirelines; Protecting measuring instruments in boreholes against heat, shock, pressure or the like
• CPC Class Codes: E21B 47/13 by electromagnetic energy, e.g. radio frequency
• CPC Class Codes: E21B 47/138 Devices entrained in the flow of well-bore fluid for transmitting data, control or actuation signals

Abstract

A method and apparatus for internal data conveyance within a well from the surface to a downhole tool or apparatus and for returning downhole tool data to the surface, without necessitating the provision of control cables and other conventional conductors within the well. One embodiment involves sending telemetry elements such as tagged drop balls or a fluid having specific chemical characteristics from surface to a downhole tool as a form of telemetry. The telemetry element or elements are provided with identification and instruction data, which may be in the form of data tags, such as RF tags or a detectable chemical constituent. The downhole tool or apparatus is provided with a detector and microcomputer and is capable of recognizing the telemetry element and communicating with it or carrying out instructions that are provided in the telemetry data thereof.

Claims

1. A method for controlling operation of a downhole apparatus in a well responsive to identification codes conveyed from the surface, comprising:

providing a tubing string in the well having a conveyance passage therein;

providing downhole a detector in communication with said conveyance passage for receiving telemetry element identification codes, and a processor for receiving and processing telemetry element identification codes and having at least one control signal output for controlling operation of said downhole apparatus;

moving a telemetry element having at least one identification code through said conveyance passage from the surface into communication proximity with said detector, wherein the telemetry element is a fluid having a specified property representing an identification code;

processing said at least one identification code of said telemetry element by said processor and providing at least one control signal output based on a preprogrammed response corresponding to said at least one identification code; and

selectively controlling at least one downhole well operation with said at least one control signal output, wherein said detector has the capability of sensing said specified property and generating signal responsive thereto.

2. The method of claim 1, wherein said telemetry element further comprises a radio frequency tag.

3. The method of claim 1, wherein said telemetry element further comprises a radioactive tag.

4. The method of claim 1, wherein said telemetry element further comprises a magnetic material.

5. The method of claim 1, wherein said telemetry element further comprises a micro-electro mechanical system (MEMS).

6. The method of claim 2, further comprising:

writing downhole data to said telemetry element; and

conveying said telemetry through said conveyance passage of said tubing string to the surface; and

downloading downhole data from said telemetry element.

7. The method of claim 1, wherein:

said fluid having a specified property further composing a trace element, the element representing an identification code; and

said detector has the capability of sensing said trace element and generating a signal responsive thereto.

9. The method of claim 2, wherein said telemetry element is of read/write character and is programmed with a plurality of operation codes and said downhole apparatus, responsive to said identification code, communicates downhole conditions to said telemetry element, said method further comprising:

communicating at least one well condition signal from said detector to said telemetry element; and

detecting operation codes of said telemetry element corresponding to said at least one well condition signal; and

operating said downhole apparatus responsive to said corresponding operation codes and said at least one well condition signal.

8. A method for controlling operation of a downhole apparatus in a well responsive to identification codes conveyed from the surface, comprising:

providing a tubing string in the well having a conveyance passage therein;

providing downhole a detector in communication with said conveyance passage for receiving telemetry element identification codes, and a processor for receiving and processing telemetry element identification codes and having at least one control signal output for controlling operation of said downhole apparatus;

moving a telemetry element having at least one identification code through said conveyance passage from the surface into communication proximity with said detector, wherein the telemetry element

is a chemical contained in said fluid, said chemical representing an identification code;

processing said at least one identification code of said telemetry element by said processor and providing at least one control signal output based on a preprogrammed response corresponding to said at least one identification code; and

selectively controlling at least one downhole well operation with said at least one control signal output, wherein said detector has the capability of sensing said chemical and generating a signal responsive thereto.

10. A universal fluid control system for wells, comprising:

a tubing string extending from surface equipment to a desired depth within a well and defining a conveyance passage;

a downhole tool adapted for positioning at a selected depth within the well and having a telemetry passage in communication with said conveyance passage;

a telemetry data detector located for acquisition of data associated with said downhole tool;

a microcomputer coupled with said telemetry data detector and programmed for processing telemetry data and providing downhole tool control signals; and

at least one telemetry element of a dimension for passing through said conveyance passage and having an identification code recognizable by said telemetry data detector for processing by said microcomputer for causing said microcomputer to communicate control signals to said downhole tool for operation thereof responsive to said identification code,

further comprising a telemetry element velocity control system located within said telemetry passage and having the capability of slowing the velocity of movement of said at least one telemetry element and rotating said at least one telemetry element through said telemetry passage.

11. The universal fluid control system of claim 10, wherein:

said tubing string is a coiled tubing string; and

said at least one telemetry element is of a configuration for passing through said conveyance passage of said coiled tubing string to detecting proximity with said telemetry data detector.

12. The universal fluid control system of claim 10, wherein said at least one telemetry element passes through said conveyance passage by gravity descent.

13. The universal fluid control system of claim 10, wherein said at least one telemetry element is transported through said conveyance passage by fluid flowing through said tubing string.

14. The universal fluid control system of claim 10, wherein:

said at least one telemetry element is read/write programmable for data communication to and from surface equipment and to and from said downhole tool; and

said at least one telemetry element is transported through said conveyance passage to and from said downhole tool by fluid flow through said tubing string.

15. The universal fluid control system of claim 10, wherein said velocity control system comprises obstructions located within said telemetry passage so as to form a helical passage therethrough.

16. The universal fluid control system of claim 10, wherein said telemetry passage runs in parallel with said conveyance passage and said conveyance passage is of a dimension smaller than said at least one telemetry element where said conveyance passage and said telemetry passage separate from one another.

17. The universal fluid control system of claim 10, said velocity control system comprising

internal projections located within said telemetry passage, said internal projections oriented to change substantially linear movement of said at least one telemetry element to non-linear movement.

18. The universal fluid control system of claim 10, wherein said velocity control system comprises a plurality of elastic projections located within said telemetry passage.

19. The universal fluid control system of claim 10, wherein:

said downhole tool comprises a tool chassis defining an internal detector chamber in communication with said conveyance passage and having said telemetry data detector therein, said detector chamber having a greater internal cross-sectional dimension than the dimension of said at least one telemetry element and said tool chassis defining a flow passage past any telemetry element located within said detector chamber; and

at least one velocity retarding element is located within said detector chamber for retarding movement of said at least one telemetry element within said detector chamber.

20. The universal fluid control system of claim 10, wherein said velocity control system comprises an obstruction in said telemetry passage, and wherein said obstruction is actuated for selective withdrawal from said telemetry passage.

21. The universal fluid control system of claim 10, wherein said velocity control system comprises a restriction in the area of said telemetry passage.

22. The universal fluid control system of claim 10, wherein said at least one telemetry element is disposable within the well.

23. A universal fluid control system for wells, comprising:

a coiled tubing string extending from the surface downhole within a well and defining a conveyance passage;

a well tool for downhole operation having a tool chassis defining an internal passage in communication with said coiled tubing;

a telemetry element having an identification code and being of a dimension for passing through said conveyance passage and into said internal passage; and

a code detector/processor positioned for sensing and processing an identification code of said telemetry element when said telemetry element is in code detecting proximity therewith and providing a control signal to said well tool for operation of said well tool in response to said identification code, further comprising a velocity control system located within said internal passage and having the capability of slowing the velocity of movement of said telemetry element and rotating said telemetry element through said internal passage.

25. The universal fluid control system of claim 23, said velocity control system comprising:

structure within said internal passage changing the direction of movement of said telemetry element from linear to non-linear for reducing the velocity of movement of said telemetry element.

26. The universal fluid control system of claim 23, wherein said telemetry element is of smaller dimension than the cross-sectional dimension of said conveyance passage to permit movement of said telemetry element through said conveyance passage to said well tool and has a ballast causing the specific gravity of said telemetry element to cause descent of said telemetry element in fluid within said conveyance passage, said ballast being releasable from said telemetry element to reduce the specific gravity of said telemetry element and permit ascent of said telemetry element within said conveyance passage to the surface.

24. The universal fluid control system of claim 24, wherein:

said telemetry element has an instruction code in addition to said identification code; and

said code detector/processor detects said instruction code and provides said control signal to said well tool only after having recognized said identification code.

27. A method of conveying information in a well, comprising:

providing a tubing string in the well having a conveyance passage communicating with a downhole apparatus, said downhole apparatus comprising a detector for receiving telemetry element identification codes, a processor fur receiving and processing telemetry element identification codes and producing a telemetry signal output, and a telemetry signaling apparatus;

moving a telemetry element having at least one identification code through said conveyance passage from the surface into communication proximity with said detector, wherein the conveyance passage comprises an internal passage capable of reducing the velocity of movement of said telemetry element;

processing said at least one identification code of said telemetry element by said processor and providing at least one telemetry signal output to said telemetry signaling apparatus in response to said at least one identification code; and

said telemetry signaling apparatus sending a signal to the surface in response to said telemetry signal output.

28. The method of claim 27, wherein said telemetry signaling apparatus is a pressure pulse telemetry system and said signal to the surface is a pressure pulse in a fluid within said conveyance passage.

29. The method of claim 27, wherein said downhole apparatus further comprises at least one downhole sensor, said method further comprising:

providing an output from said downhole sensor to said processor, said signal to the surface corresponding to the output of said downhole sensor.

30. The method of claim 29, wherein said downhole sensor is a temperature sensor.

31. The method of claim 29, wherein said downhole sensor is a pressure sensor.

32. A method of communicating with a downhole apparatus in a well, comprising:

providing a tubing string in the well having a conveyance passage communicating with said downhole apparatus, said downhole apparatus comprising a detector for receiving information from a telemetry element and a processor for receiving and processing telemetry element information;

moving a telemetry element having a program code through said conveyance passage from the surface into communication proximity with said detector;

the conveyance path comprising a velocity control system capable of reducing the velocity of the telemetry element and

processing said program code by said processor such that said processor is programmed by said code.

33. The method of claim 32, wherein said program code includes at least one conditional command.

34. The method of claim 32, wherein said telemetry element comprises a read/write radio frequency tag.

35. The method of claim 32, wherein said programming of said processor comprises re-programming said processor.

36. A method of conveying information in a well, comprising:

providing a tubing string in the well having a conveyance passage therein;

providing a downhole apparatus in the well, said downhole apparatus capable of storing data therein;

moving a telemetry element through said conveyance passage from the surface into communication proximity with said downhole apparatus;

providing a telemetry element velocity control system having the capability of causing the moving telemetry element to rotate;

recording data from said downhole apparatus in said telemetry element; and

returning said telemetry element to the surface by fluid flow through said conveyance passage.

37. The method of claim 36, further comprising downloading the recorded data from said telemetry element at the surface.

38. The method of claim 36, wherein said telemetry element is a radio frequency tag.