# US 8,146,673 B2 · Method of activating a downhole tool assembly

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- Number: US 8,146,673 B2
- Document ID: US8146673B2
- Status: Granted
- Kind: B2
- Application number: 12/978,747
- Filed: 2010-12-27
- Published: 2011-04-21
- Granted: 2012-04-03
- Earliest claimed: 2007-02-23
- Assignees: Halliburton Energy Services, Inc.
- Inventors: Matt Howell; Kevin Manke
- Web page: https://patentgrep.com/patent/US8146673B2

## CPC

- E21B 23/006: {"J-slot" systems, i.e. lug and slot indexing mechanisms}
- E21B 23/0412: {characterised by pressure chambers, e.g. vacuum chambers}
- E21B 23/0418: {specially adapted for locking the tools in landing nipples or recesses}
- E21B 23/042: {using a single piston or multiple mechanically interconnected pistons}
- E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS

## Abstract

A downhole tool assembly has a sleeve with a continuous j-slot, a lug rotator ring configured to move axially relative to the sleeve and having a lug configured to move within the continuous j-slot, and a rupture disk configured to prevent the lug from moving within the continuous j-slot during run-in. A method of activating the downhole tool assembly includes lowering the downhole tool assembly into a well bore on a tool string, rupturing the rupture disk, allowing the lug to move within the continuous j-slot, and setting the downhole tool assembly by lifting upward and pushing downward on the tool string.

## Claims

### Claim 1

A method of activating a downhole tool assembly comprising a sleeve having a continuous j-slot, a lug rotator ring configured to move axially relative to the sleeve and having a lug configured to move within the continuous j-slot, and lock comprising a shear pin and a locking portion configured to move separately from the lug between a locked position and an unlocked position, where the locking portion is in the locked position to block the lug from moving within the continuous j-slot during run-in, the method comprising:
lowering the downhole tool assembly into a well bore on a tool string;
shearing the shear pin, moving the locking portion separately from the lug to the unlocked position to unblock the lug and allow the lug to move within the continuous j-slot, wherein the locking portion is biased in the unlocked position by a biasing member; and
setting the downhole tool assembly by lifting upward and pushing downward on the tool string.

### Claim 2 (depends on 1)

The method of activating a downhole tool assembly of claim 1, wherein setting the downhole tool assembly tool comprises lifting upward or pushing downward on the tool string multiple times.

### Claim 3 (depends on 1)

The method of activating a downhole tool assembly of claim 1, wherein shearing the shear pin comprises applying pressure.

### Claim 4 (depends on 1)

The method of activating a downhole tool assembly of claim 1, further comprising unsetting the downhole tool assembly by lifting upward and pushing downward on the tool string.

### Claim 5 (depends on 4)

The method of activating a downhole tool assembly of claim 4, further comprising retrieving the downhole assembly by pulling upwardly on the tool string.

### Claim 6 (depends on 1)

The method of activating a downhole tool assembly of claim 1, wherein the downhole tool assembly comprises a packer.

### Claim 7 (depends on 1)

The method of activating a downhole tool assembly of claim 1, wherein the downhole tool assembly comprises a valve.