# US 2014/0151031 A1 · Reducing Rotational Vibration in Rotational Measurements

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- Number: US 2014/0151031 A1
- Document ID: US20140151031A1
- Status: Published application
- Kind: A1
- Application number: 13/706,212
- Filed: 2012-12-05
- Published: 2014-06-05
- Earliest claimed: 2012-12-05
- Assignees: Baker Hughes Incorporated
- Applicants: Baker Hughes Incorporated
- Inventors: Arcady Reiderman; Robert Estes; Fei Le; Hanno Reckmann; Christian Herbig
- Web page: https://patentgrep.com/patent/US20140151031A1

## CPC

- E21B 47/017: Protecting measuring instruments
- E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS

## Abstract

An apparatus for mitigation of torsional noise effects on borehole measurements. The apparatus may include a conveyance device; a sleeve having a sensor section, the sleeve rotatably disposed on the conveyance device; a sensor having at least one component disposed on the sensor section; and a driver coupled to the conveyance device and configured to rotate at least the sleeve sensor section. The driver may rotate the sleeve sensor section independent of the conveyance device. The driver may rotate the sleeve sensor section at a preset substantially constant rotational speed. The sleeve may include at least one arm configured to selectively lock the sleeve to a surface in the borehole. The driver may rotate the sleeve sensor section during measurement by the sensor. The driver may selectively couple the sleeve.

## Claims

### Claim 1

An apparatus for mitigation of torsional noise effects on borehole measurements, the apparatus comprising:
a conveyance device;
a sleeve having a sensor section, the sleeve rotatably disposed on the conveyance device;
a sensor having at least one component disposed on the sensor section; and
a driver coupled to the conveyance device and configured to rotate at least the sleeve sensor section.

### Claim 2 (depends on 1)

The apparatus of claim 1, wherein the driver rotates the sleeve sensor section independent of the conveyance device.

### Claim 3 (depends on 1)

The apparatus of claim 1, wherein the driver rotates the sleeve sensor section at a preset substantially constant rotational speed.

### Claim 4 (depends on 1)

The apparatus of claim 1, wherein the driver includes at least one of: i) a mud motor; ii) an electric motor; and iii) a hydraulic motor.

### Claim 5 (depends on 1)

The apparatus of claim 1, wherein the driver rotates the sleeve sensor section during measurement by the sensor.

### Claim 6 (depends on 1)

The apparatus of claim 1, wherein the driver comprises a coupler that selectively couples the sleeve with a rotary power source.

### Claim 7 (depends on 6)

The apparatus of claim 6, wherein the coupler couples the sleeve with the rotary power source to generate a target speed for the sleeve, and decouples the sleeve from the rotary power source.

### Claim 8 (depends on 7)

The apparatus of claim 7, further comprising a second sensor providing a response relating to a parameter of a fluid in viscous contact with the sleeve.

### Claim 9 (depends on 8)

The apparatus of claim 8, further comprising a processor configured to account for decay of rotational speed of the sleeve using an estimated viscosity of the fluid.

### Claim 10 (depends on 6)

The apparatus of claim 6, wherein the rotary power source is at least one of: i) the conveyance device; ii) a mud motor; iii) an electric motor; and iv) a hydraulic motor.

### Claim 11 (depends on 1)

The apparatus of claim 1, wherein the sleeve comprises an actively stabilized non-rotating section disposed on the conveyance device.

### Claim 12 (depends on 11)

The apparatus of claim 11, wherein the actively stabilized non-rotating section of the sleeve includes at least one arm configured to selectively lock the actively stabilized non-rotating section to a surface in the borehole.

### Claim 13 (depends on 1)

The apparatus of claim 1, wherein the at least one sensor component comprises a magnet-coil assembly.

### Claim 14 (depends on 1)

The apparatus of claim 1, wherein the sensor comprises a magnet-coil assembly having multiple receiving coils at different radii with respect to the axis of rotation of the sleeve.

### Claim 15 (depends on 14)

The apparatus of claim 14, wherein at least a magnet and at least one of the multiple receiving coils of the magnet-coil assembly are mounted on the sleeve.

### Claim 16

A method for mitigating torsional noise effects on borehole measurements, the method comprising:
disposing a sleeve having a sensor section on a conveyance device with at least one component of a sensor disposed on the sensor section; and
rotating at least the sleeve sensor section independently of the conveyance device during measurement by the sensor.