# US 11,078,744 B2 · Downhole plug

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- Number: US 11,078,744 B2
- Document ID: US11078744B2
- Status: Granted
- Kind: B2
- Application number: 15/961,359
- Filed: 2018-04-24
- Published: 2019-10-24
- Granted: 2021-08-03
- Earliest claimed: 2018-04-24
- Assignees: Shale Oil Tools, LLC
- Applicants: Shale Oil Tools, LLC
- Inventors: Brian Kennedy
- Web page: https://patentgrep.com/patent/US11078744B2

## CPC

- E21B 33/1208: {characterised by the construction of the sealing or packing means (E21B33/1277 takes precedence)}
- E21B 33/128: with a member expanded radially by axial pressure (E21B33/122, E21B33/124 take precedence)
- E21B 33/134: Bridging plugs
- E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS

## Abstract

In wellbore completions it is sometimes desirable to seal the wellbore against fluid flow or to anchor a component within the wellbore. However, running such a plug into the wellbore has been problematic on occasion such as when the nose of the plug encounters an object within the wellbore such as a sand bridge or other obstruction. In those instances, the way of the tubular pushing the plug into the wellbore combined with the nose of the plug being unable to pass the instruction causes the plug to prematurely set. Such an instance the plug may need to be drilled out in order to proceed. In the present embodiment the tubular used to move the plug into the well is attached to the nose of the plug so that the force provided to the plug by the tubular is transmitted only to the nose of the plug preventing the plug from presetting and allowing the plug to push past or through an obstacle within the wellbore. In addition is envisioned that the plug may incorporate compartment that the plug within which may be placed a chemical, electronics, sensors, or other items as desired by the operator.

## Claims

### Claim 1

A plug comprising:
a plug body,
wherein the plug body has a through bore and a cavity;
wherein the cavity is accessed via the through bore;
a plug nose,
wherein the plug nose has a second through bore;
a mandrel,
wherein the mandrel is within the plug body through bore and the plug nose second through bore;
wherein a shear device on a forward portion of the mandrel engages the plug nose; and
wherein the mandrel is configured to pull the plug into the well by the plug nose.

### Claim 2 (depends on 1)

The plug of claim 1 wherein, the mandrel engages the plug body.

### Claim 3 (depends on 1)

The plug of claim 1 wherein, the mandrel has a shoulder to engage the plug body.

### Claim 4 (depends on 1)

The plug of claim 1 wherein, the mandrel engages the plug body with a second shear device.

### Claim 5 (depends on 1)

The plug of claim 1 wherein, the shear device is a shear threads.

### Claim 6 (depends on 1)

The plug of claim 1 wherein, the plug body has a seat on a rearward facing surface.

### Claim 7 (depends on 1)

The plug of claim 1 wherein, the cavity contains a chemical.

### Claim 8

The method of inserting a plug into a wellbore comprising:
attaching a mandrel to a plug nose;
attaching the plug nose to a plug body such that the plug body follows the plug nose;
running the mandrel, plug body, and plug nose into a wellbore; and
pulling the plug into the well by the plug nose.

### Claim 9 (depends on 8)

The method of claim 8 wherein, the plug nose has a through bore and the plug body has a second through bore; further wherein the mandrel passes through the plug body second through bore and the plug nose through bore.

### Claim 10 (depends on 8)

The method of claim 8 wherein, a shear device on the forward portion of the mandrel engages the plug nose via the shear device.

### Claim 11 (depends on 8)

The method of claim 8 wherein, the mandrel engages the plug body.

### Claim 12 (depends on 8)

The method of claim 8 wherein, the mandrel has a shoulder to engage the plug body.

### Claim 13 (depends on 8)

The method of claim 8 wherein, the mandrel engages the plug body with a second shear device.

### Claim 14 (depends on 8)

The method of claim 8 wherein, shear device is a shear thread.

### Claim 15 (depends on 8)

The method of claim 8 wherein, the plug body has a seat on a rearward facing surface.

### Claim 16 (depends on 8)

The method of claim 8 wherein, the cavity contains a chemical.