# US 2014/0151068 A1 · Downhole pulse generating device for through-bore operations

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- Number: US 2014/0151068 A1
- Document ID: US20140151068A1
- Status: Published application
- Kind: A1
- Application number: 14/090,829
- Filed: 2013-11-26
- Published: 2014-06-05
- Earliest claimed: 2012-11-30
- Assignees: National Oilwell Varco, L.P.
- Applicants: National Oilwell Varco, L.P.
- Inventors: Russell GILLEYLEN; Haresh Ghansyam; James R. Streater, JR.; Deepthi Setlur; Alan H. Kitching; Shiran Waas; Murray Gilbertson
- Web page: https://patentgrep.com/patent/US20140151068A1

## CPC

- E21B 28/00: Vibration generating arrangements for boreholes or wells, e.g. for stimulating production ({for fishing for or freeing objects E21B31/005;} for transmitting measuring-signals E21B47/14; for geophysical measurements G01V1/02)
- 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 downhole tool comprises a housing having a longitudinal bore and an agitator assembly disposed within the longitudinal bore of the housing. A removable component is disposed within the longitudinal bore and can be removed from the housing so as to at least partially open the longitudinal bore.

## Claims

### Claim 1

A downhole tool comprising:
a housing having a longitudinal bore;
an agitator assembly disposed within the longitudinal bore of the housing; and
a removable component disposed within the longitudinal bore, wherein the removable component can be removed from the housing so as to at least partially open the longitudinal bore.

### Claim 2 (depends on 1)

The downhole tool of claim 1, wherein a through bore operation can be performed through the longitudinal bore once the removable component is removed from the housing.

### Claim 3 (depends on 1)

The downhole tool of claim 1, wherein the removable component is a part of the agitator assembly.

### Claim 4 (depends on 1)

The downhole tool of claim 1, wherein the agitator assembly further comprises a stator coupled to the housing and a rotor that is rotated by a fluid moving through the housing.

### Claim 5 (depends on 4)

The downhole tool of claim 4, wherein the removable component is disposed within the rotor.

### Claim 6 (depends on 4)

The downhole tool of claim 4, wherein the rotor is the removable component.

### Claim 7 (depends on 1)

The downhole tool of claim 1, wherein the removable component is disposed within a bypass channel through the housing.

### Claim 8

A downhole tool comprising:
a housing having a longitudinal bore;
an agitator assembly disposed within the housing and obstructing the longitudinal bore; and
a removable component disposed within the housing, wherein the removable component can be removed from the housing to at least partially open the longitudinal bore.

### Claim 9 (depends on 8)

The downhole tool of claim 8, wherein a through bore operation can be performed through the longitudinal bore once the removable component is removed from the housing.

### Claim 10 (depends on 8)

The downhole tool of claim 8, wherein the removable component is a part of the agitator assembly.

### Claim 11 (depends on 8)

The downhole tool of claim 8, wherein the agitator assembly further comprises a stator coupled to the housing and a rotor that is rotated by a fluid moving through the housing.

### Claim 12 (depends on 11)

The downhole tool of claim 11, wherein the removable component is disposed within the rotor.

### Claim 13 (depends on 11)

The downhole tool of claim 11, wherein the rotor is the removable component.

### Claim 14 (depends on 8)

The downhole tool of claim 8, wherein the removable component is disposed within a bypass channel through the housing.

### Claim 15

A method comprising:
disposing an agitator assembly in a housing having a longitudinal bore therethrough;
disposing the agitator assembly and housing into a wellbore;
operating the agitator assembly by moving a fluid through the housing;
removing a removable component from the housing so as to at least partially open a longitudinal bore through the housing; and
running a downhole tool into the wellbore and through the longitudinal bore of the housing.

### Claim 16 (depends on 15)

The method of claim 15, wherein the removable component is a part of the agitator assembly.

### Claim 17 (depends on 15)

The method of claim 15, wherein the agitator assembly comprises a stator coupled to the housing and a rotor that is rotated by the fluid moving through the housing.

### Claim 18 (depends on 17)

The method of claim 17, wherein the removable component is disposed within the rotor.

### Claim 19 (depends on 17)

The method of claim 17, wherein the rotor is the removable component.

### Claim 20 (depends on 17)

The method of claim 17, wherein the removable component is disposed within a bypass channel through the housing.