# US 10,119,343 B2 · Inductive coupling

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- Number: US 10,119,343 B2
- Document ID: US10119343B2
- Status: Granted
- Kind: B2
- Application number: 15/174,813
- Filed: 2016-06-06
- Published: 2017-12-07
- Granted: 2018-11-06
- Earliest claimed: 2016-06-06
- Assignees: Sanvean Technologies LLC
- Applicants: Sanvean Technologies LLC
- Inventors: Junichi Sugiura; Stephen Jones
- Web page: https://patentgrep.com/patent/US10119343B2

## CPC

- E21B 17/0283: {characterised by the coupling being contactless, e.g. inductive}
- E21B 17/042: Threaded
- E21B 17/1078: {Stabilisers or centralisers for casing, tubing or drill pipes (E21B17/1007 - E21B17/1064 take precedence)}
- E21B 47/00: Survey of boreholes or wells (monitoring pressure or flow of drilling fluid E21B21/08)
- 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
- H02J 50/12: of the resonant type
- H02J 50/402: {the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas}
- E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY

## Abstract

An inductive coupler includes a first transceiver electrically coupled to a first coil through a first tuning circuit. The inductive coupler may also include a second transceiver electrically coupled to a second coil through a second tuning circuit, where the second coil is positioned substantially concentric with the first coil.

## Claims

### Claim 1

A downhole tool comprising:
a collar including a primary collar and an intermediate collar;
a probe positioned within the collar;
a collar transceiver positioned within the primary collar, the collar transceiver electrically coupled to a male coil through a collar tuning circuit;
a probe transceiver positioned within the probe, the probe transceiver electrically coupled to a probe coil through a probe tuning circuit;
a female coil positioned within the intermediate collar; and
a collar coil positioned within the intermediate collar, the collar coil electrically coupled to the female coil through an intermediate tuning circuit;
wherein the collar transceiver, collar tuning circuit, male coil, female coil, intermediate tuning circuit, collar coil, probe coil, probe tuning circuit, and probe transceiver are arranged in series.

### Claim 2 (depends on 1)

The downhole tool of claim 1, wherein the female coil is substantially concentric with the male coil.

### Claim 3 (depends on 1)

The downhole tool of claim 1, further comprising a threaded connection between the primary collar and the intermediate collar, the threaded connection including a male coupler and a female coupler, wherein the male coil is positioned on the male coupler and the female coil is positioned on the female coupler.

### Claim 4 (depends on 1)

The downhole tool of claim 1, wherein the collar tuning circuit and probe tuning circuits comprise one or more of parallel resonant tanks or series resonant tanks, and the intermediate tuning circuit comprises one or more of parallel resonant tanks or series resonant tanks.

### Claim 5 (depends on 1)

The downhole tool of claim 1, wherein the intermediate tuning circuit comprises a primary tuning circuit and a secondary tuning circuit.

### Claim 6 (depends on 5)

The downhole tool of claim 5, wherein the collar tuning circuit has a resonant frequency substantially equal to a resonant frequency of the primary tuning circuit, and the probe tuning circuit has a resonant frequency substantially equal to a resonant frequency of the secondary tuning circuit.

### Claim 7 (depends on 6)

The downhole tool of claim 6, wherein the first, second, primary, and secondary tuning circuits each comprise a capacitor.

### Claim 8 (depends on 6)

The downhole tool of claim 6, wherein the first and second tuning circuits are single-tuned or dual-tuned.

### Claim 9 (depends on 8)

The downhole tool of claim 8, wherein the first and second tuning circuits are dual-tuned, and signal and power is transferred through the inductive coupler.

### Claim 10 (depends on 6)

The downhole tool of claim 6, wherein the first and second tuning circuits comprise one or more low-pass filters, high-pass filters, or band rejection filters.

### Claim 11 (depends on 6)

The downhole tool of claim 6, wherein the first and second tuning circuits comprise one or more impedance-matching circuits.

### Claim 12 (depends on 1)

The downhole tool of claim 1, wherein the collar and probe are components of a motor, turbine, rotary steerable system, MWD, LWD, or drill bit and the probe is a mandrel.