# US 9,752,390 B2 · Casing window assembly

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- Number: US 9,752,390 B2
- Document ID: US9752390B2
- Status: Granted
- Kind: B2
- Application number: 15/154,031
- Filed: 2016-05-13
- Published: 2016-09-01
- Granted: 2017-09-05
- Earliest claimed: 2015-02-06
- Assignees: Halliburton Energy Services, Inc.
- Applicants: Halliburton Energy Services, Inc.
- Inventors: David Joe Steele
- Web page: https://patentgrep.com/patent/US9752390B2

## CPC

- E21B 17/00: Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; {Cables;} Casings; Tubings
- E21B 17/18: Pipes provided with plural fluid passages {(E21B17/203 takes precedence)}
- E21B 23/004: {Indexing systems for guiding relative movement between telescoping parts of downhole tools}
- E21B 29/06: Cutting windows, e.g. directional window cutters for whipstock operations ({E21B29/005 and} E21B29/08 take precedence)
- E21B 41/0035: {Apparatus or methods for multilateral well technology, e.g. for the completion of or workover on wells with one or more lateral branches}
- E21B 43/10: Setting of casings, screens, liners {or the like} in wells
- E21B 43/103: {of expandable casings, screens, liners, or the like}
- E21B 47/024: of devices in the borehole (determining slope or direction of the borehole E21B47/022)
- E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS

## Abstract

A casing window assembly for completion of a lateral wellbore. The casing window assembly includes a tubular casing sleeve with a casing window and an inner sleeve releasably secured within the casing sleeve at a pre-released position adjacent the casing window.

## Claims

### Claim 1

A method for installing a casing window assembly, comprising:
lowering the casing window assembly into a main wellbore to a predetermined depth, the casing window assembly including a tubular casing sleeve with a position for a casing window and an inner sleeve releasably secured within the casing sleeve at a pre-released position adjacent the position for the casing window;
releasing the inner sleeve from the casing sleeve;
releasably securing the inner sleeve within the casing sleeve at a post-released position below the position for the casing window.

### Claim 2 (depends on 1)

The method of claim 1, wherein the inner sleeve substantially prevents fluid communication between the wellbore and within the casing sleeve adjacent the position for the casing window when the inner sleeve is releasably secured at the pre-released position.

### Claim 3 (depends on 1)

The method of claim 1, further comprising:
orienting a tool within the casing sleeve at a lateral position that is substantially the same as a lateral position of the position for the casing window; and
lowering the tool to a depth that is substantially the same as a depth of the position for the casing window.

### Claim 4 (depends on 3)

The method of claim 3, further comprising positioning another tool through the casing sleeve at the position for the casing window when the inner sleeve is releasably secured at the post-released position.

### Claim 5 (depends on 1)

The method of claim 1, wherein the inner sleeve is releasably secured within the casing sleeve at the pre-released position by a securing element and a recess in an inside diameter of the casing sleeve for receipt of a portion of the securing element.

### Claim 6 (depends on 1)

The method of claim 1, wherein the inner sleeve is releasably secured within the casing sleeve at the post-released position by an expandable wall and a recessed wall profile in an inside diameter of the casing sleeve for receipt of a portion of the expandable wall.

### Claim 7 (depends on 6)

The method of claim 6, further comprising positioning a bushing within the recessed wall profile of the casing sleeve.

### Claim 8 (depends on 1)

The method of claim 1, further comprising applying a force to cause the inner sleeve to release from the post-released position or the pre-released position.

### Claim 9 (depends on 8)

The method of claim 8, wherein an end of the recessed wall profile includes a shoulder to secure the inner sleeve substantially near the post-released position when the force causes the inner sleeve to release from the post-released position or the pre-released position and move toward the shoulder.