System And Method For Wireless Drilling And Non-Rotating Mining Extenders In A Drilling Operation

Inactive Publication Date: 2014-03-27
SCHLUMBERGER TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes methods and systems for wireless power and data communication in a drilling apparatus. The patent suggests using resonant circuits and impedance matching to transfer electrical power and signals between two stationary tools without the need for a direct mechanical connection. The patent discusses using stationary annular and mandrel coils to efficiently transfer power and communications, even in the face of movement and misalignment. The patent also mentions using the same frequency for resonating the primary and secondary coils to compensate for flux leakage. The technical effects include improved efficiency and reliability in transmitting power and communications in a drilling apparatus.

Problems solved by technology

Failure of a BHA, whether mechanically or electrically, inevitably brings about expensive and unwelcomed operating costs as the drilling process may be halted and the drill string retracted from the bore so that the failed BHA can be repaired.
In many cases, retraction of a drill string to repair a failed BHA can range in cost from hundreds of thousands of dollars to millions of dollars.
A common failure point for BHAs is the point of connection from tool to tool, which is naturally prone to failure from adverse fluid ingress and / or misalignment between adjacent tools.

Method used

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  • System And Method For Wireless Drilling And Non-Rotating Mining Extenders In A Drilling Operation
  • System And Method For Wireless Drilling And Non-Rotating Mining Extenders In A Drilling Operation
  • System And Method For Wireless Drilling And Non-Rotating Mining Extenders In A Drilling Operation

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Experimental program
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Effect test

embodiment 230

[0052]Turning now to FIGS. 5A and 5B, a cross sectional view of two coils 232, 234 is illustrated in FIG. 5A and a side view of the two coils 232, 234 is illustrated in FIG. 5B. In these two figures, a receiving coil 232 inside a transmitting coil 234 of a particular embodiment 230 is depicted. The receiving coil 232 includes a ferrite rod core 235 that, in some embodiments, may be about 12.5 mm (about 0.49 inch) in diameter and about 96 mm (about 3.78 inches) long with about thirty-two turns of wire 237. Notably, although specific dimensions and / or quantities of various components may be offered in this description, it will be understood by one of ordinary skill in the art that the embodiments are not limited to the specific dimensions and / or quantities described herein.

[0053]Returning to FIG. 5, the transmitting coil 234 may include an insulating housing 236, about twenty-five turns of wire 239, and an outer shell of ferrite 238. The wall thickness of the ferrite shell 238 in the ...

embodiment 264

[0061]Turning to FIG. 13, AC power can be passed through the coils. Input AC power at frequency f1 is converted to resonant frequency f0 by a frequency convertor. Normally this would be a step up convertor with f0>>f1. The receiver circuit outputs power at frequency f0, which is converted back to AC power at frequency f1. Alternatively, as one of ordinary skill in the art recognizes, the FIG. 13 embodiment 264 could be modified to accept DC power in and produce AC power out, and vice versa.

[0062]In lieu of, or in addition to, passing power, data signals may be transferred from one coil to the other in certain embodiments by a variety of means. In the above example, power is transferred using an about 100.0 kHz oscillating magnetic field. It is envisioned that this oscillating signal may also be used as a carrier frequency with amplitude modulation, phase modulation, or frequency modulation used to transfer data from the transmitting coil to the receiving coil. Such would provide a o...

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Abstract

Various embodiments of methods and systems for wireless power and data communications transmissions to a sensor subassembly below a mud motor in a bottom hole assembly are disclosed. Power and / or communications are transmitted through stationary or fixed coils. By leveraging resonantly tuned circuits and impedance matching techniques for the stationary coils, power and / or communications can be transmitted efficiently from one stationary coil to the other stationary coil despite any vibration and / or misalignment of the two coils.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims the benefit of and priority to U.S. Provisional Patent Application Ser. No. 61 / 704,820, entitled “System And Method For Wireless Drilling And Mining Extenders In A Drilling Operation, and filed on Sep. 24, 2012, U.S. Provisional Patent Application Ser. No. 61 / 704,805, entitled “System And Method for Wireless Power And Data Transmission In A Mud Motor,” and filed on Sep. 24, 2012, and U.S. Provisional Patent Application Ser. No. 61 / 704,758, entitled “Positive Displacement Motor Rotary Steerable System And Apparatus,” and filed on Sep. 24, 2012, the disclosures of which are hereby incorporated by reference in their entireties.DESCRIPTION OF THE RELATED ART[0002]Bottom hole assemblies (“BHA”) at the end of a typical drill string used in the drilling and mining industry today may be a complex assembly of technology that includes not only a drill bit, but also an array of serially connected drill string components or to...

Claims

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Application Information

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IPC IPC(8): E21B47/12
CPCE21B47/12E21B47/13E21B17/0283
InventorCODAZZI, DANIELGADOT, RAPHAELCLARK, BRIAN OLIVER
OwnerSCHLUMBERGER TECH CORP