# US 8,540,028 B1 · Autonomous junk collecting sleeve for a riser

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- Number: US 8,540,028 B1
- Document ID: US8540028B1
- Status: Granted
- Kind: B1
- Application number: 13/448,181
- Filed: 2012-04-16
- Granted: 2013-09-24
- Earliest claimed: 2007-03-23
- Assignees: Wellbore Specialties, LLC
- Applicants: Dennis J. Penisson
- Inventors: Dennis J. Penisson
- Web page: https://patentgrep.com/patent/US8540028B1

## CPC

- E21B 27/00: Containers for collecting or depositing substances in boreholes or wells, e.g. bailers, {baskets or buckets} for collecting mud or sand; Drill bits with means for collecting substances, e.g. valve drill bits
- E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS

## Abstract

An autonomous junk collecting sleeve for a riser is provided. The sleeve is constructed and arranged to be independently lowered and seated above a subsea tree section and, subsequently, raised and removed independent of the work string. The autonomous junk collecting sleeve includes a first cylindrical structure, a second cylindrical structure concentric to the first cylindrical structure and which are joined together in spatial relation at a bottom end to form an interior J-channel basket. The J-channel basket is operable to collect debris traveling up through the bottom end and over of the second cylindrical structure for deposit therein.

## Claims

### Claim 1

A method of cleaning a wellbore comprising:
cleaning a riser from an upper surface to a subsea tree section;
lowering an autonomous junk collecting sleeve at a seat of the riser;
installing a work string through the riser and the autonomous junk collecting sleeve to a depth of the wellbore, the work string being independent of the sleeve;
cleaning a wellbore with the work string; and
collecting debris from the wellbore in the autonomous junk collecting sleeve, simultaneously with the cleaning of the wellbore.

### Claim 2 (depends on 1)

The method according to claim 1, further including, during cleaning of the riser, employing very high fluid flow rates in the riser.

### Claim 3 (depends on 1)

The method according to claim 1, further including, during the cleaning of the wellbore, moving the work string; and
further including maintaining the autonomous junk collecting sleeve stationary at the seat of the riser during said moving of the work string.

### Claim 4 (depends on 1)

The method according to claim 1, wherein the collecting of the debris includes collecting from the wellbore one or more of leftover drilling fluids, cement bits, iron debris and caked deposits from a casing wall in the autonomous junk collecting sleeve.

### Claim 5 (depends on 4)

The method according to claim 4, further including, during the collecting of the debris, the following:
channeling drilling fluid through an annulus between the work string and a hollow throughbore center of the autonomous junk collecting sleeve; and
accessing a junk collecting space of the autonomous junk collecting sleeve directly from the annulus to deposit the debris.

### Claim 6 (depends on 1)

The method according to claim 1, further including:
fishing the autonomous junk collecting sleeve from the riser.

### Claim 7 (depends on 6)

The method according to claim 6, wherein the fishing further includes:
fishing the autonomous junk collecting sleeve from the riser after the cleaning of the wellbore is complete.