Coiled Tube Drilling Bottom Hole Assembly Having Wireless Power And Data Connection
First Claim
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1. A method for operating a drilling assembly, the method comprising:
- providing a first coil within a second coil;
coupling the first and second coils with a coupling coefficient, k, wherein, k=M/√
{square root over (L1L2)}≦
0.9, M is a mutual inductance between the first and second coils, L1 is a first self-inductance of the first coil, and L2 is a second self-inductance of the second coil; and
resonantly tuning the first coil at a first frequency, f1, with a first capacitance, C1, and the second coil at a second frequency, f2, with a second capacitance, C2, wherein f1 is approximately equal to f2,
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Abstract
Various embodiments of methods and systems for providing wireless power and data communication in a drilling assembly. One embodiment includes a system for transmitting power or data communications in a drill string. The system includes a drilling assembly having an inner cylindrical coil located inside an outer cylindrical coil. The inner cylindrical coil is adapted to rotate with respect to the outer cylindrical coil, rotate around an axis of the outer cylindrical coil, or move axially with respect to the outer cylindrical coil.
33 Citations
20 Claims
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1. A method for operating a drilling assembly, the method comprising:
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providing a first coil within a second coil; coupling the first and second coils with a coupling coefficient, k, wherein, k=M/√
{square root over (L1L2)}≦
0.9, M is a mutual inductance between the first and second coils, L1 is a first self-inductance of the first coil, and L2 is a second self-inductance of the second coil; andresonantly tuning the first coil at a first frequency, f1, with a first capacitance, C1, and the second coil at a second frequency, f2, with a second capacitance, C2, wherein f1 is approximately equal to f2, - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A system for transmitting power or data communications in a drill string, the system comprising:
a drilling assembly comprising an inner cylindrical coil located inside an outer cylindrical coil, wherein the inner cylindrical coil is adapted to rotate with respect to the outer cylindrical coil, rotate around an axis of the outer cylindrical coil, or move axially with respect to the outer cylindrical coil. - View Dependent Claims (15, 16)
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17. A bottom hole assembly (BHA) for use in a coiled tube drilling system, the BHA comprising:
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a measuring-while-drilling (MWD) module configured for coupling to coiled tubing; and a wireless power and data connection disposed above a drilling motor for providing power and data connectivity between the MWD module and the drilling motor. - View Dependent Claims (18, 19, 20)
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Specification