# US 2014/0196952 A1 · Downhole sinusoidal vibrational apparatus

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- Number: US 2014/0196952 A1
- Document ID: US20140196952A1
- Status: Published application
- Kind: A1
- Application number: 14/119,625
- Filed: 2012-05-23
- Published: 2014-07-17
- Earliest claimed: 2011-05-24
- Assignees: Flexidrill Limited
- Inventors: Owen Schicker; Enda Hand
- Web page: https://patentgrep.com/patent/US20140196952A1

## CPC

- E21B 7/24: Drilling using vibrating or oscillating means, e.g. out-of-balance masses (percussion drilling E21B1/00)
- E21B 31/005: {using vibrating or oscillating means}
- E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS

## Abstract

A device in place as, or suitable for use as, a vibrational tool of or in a downhole assembly, the device having a first magnetic assembly which is to be, or can be, rotated relative to a second magnetic assembly and which, when so rotated, causes the second magnetic assembly to oscillate and/or reciprocate at least substantially in an axial manner; wherein the oscillating and/or reciprocating magnetic assembly, at least substantially, at either one end, or both ends, is attached to and constrained in its oscillations and/or reciprocation by a compliant member thereby allowing the output force to be distributed to the outer body of the vibrational tool and/or any attached uphole and/or downhole tooling, from the compression and extension of the compliant member in a substantially sinusoidal manner.

## Claims

### Claim at position 1

1-20. (canceled)

### Claim 21

A device in place as, or suitable for use as, a vibrational tool of or in a downhole assembly, the device having a first magnetic assembly which is to be, or can be, rotated relative to a second magnetic assembly and which, when so rotated, causes the second magnetic assembly to oscillate and/or reciprocate at least substantially in an axial manner; wherein
the oscillating and/or reciprocating magnetic assembly, at least substantially, at either one end, or both ends, is attached to and constrained in its oscillations and/or reciprocation by a compliant member thereby allowing the output force to be distributed to the outer body of the vibrational tool and/or any attached uphole and/or downhole tooling, from the compression and extension of the compliant member in a substantially sinusoidal manner.

### Claim 22 (depends on 21)

A device of claim 21 wherein the second magnetic assembly is constrained to be synchronous in rotation with the outer body of the vibrational tool.

### Claim 23 (depends on 21)

A device of claim 21 wherein the suitable power source is hydraulic mud flow, electrical power or pneumatic energy to an input device.

### Claim 24 (depends on 23)

A device as in claim 23 wherein the frequency of oscillation and/or reciprocation can be controlled by the input of the suitable power source.

### Claim 25 (depends on 24)

A device of claim 24 wherein the manipulation of the input speed of the input device controls the amplification of force.

### Claim 26 (depends on 24)

A device as in claim 24 having an input device (PDM or other) powered by drilling mud and having a bypass mechanism or configuration which allows the drilling mud to pass when under a threshold through the tool without energising the tool.

### Claim 27 (depends on 21)

A device as in claim 21 when one or more is placed anywhere in the or a drill string.

### Claim 28 (depends on 21)

A device as in claim 21 wherein either the uphole vibration or downhole vibration is dampened/controlled by a said compliant member.

### Claim 29 (depends on 21)

A device as in claim 21 which uses a substantially non compressible fluid within its cross section to minimise pressure differential sealing issues.

### Claim 30 (depends on 29)

A device of claim 29 having a pressure compensating device.

### Claim 31 (depends on 29)

A device of claim 29 having plural chambers containing various viscosity liquid content.

### Claim 32 (depends on 21)

A device as in claim 21 that has a centre drilling fluid pathway of a uniform cross section able to operate with viscous drilling fluids.

### Claim 33 (depends on 21)

A device of claim 21 which can be used, or when use, in conjunction with any one or more of the following downhole applications:
shifting valves
setting plugs
setting screens
Washouts
sand control in screens
milling
scale removal
cementing
core sampling
drilling
fishing for stuck tools
used in wire line applications

### Claim 34

The use of a compliant imposition(s) on the vibrational output of a device on demand downhole actuable to cause relative axial movement.

### Claim 35

A vibrational device on demand actuable by relative rotational input to cause axial relative movement outputting via compliant constraints on the extent of the axial relative movement.