# US 2021/0277727 A1 · Rotating control device, and installation and retrieval thereof

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- Number: US 2021/0277727 A1
- Document ID: US20210277727A1
- Status: Published application
- Kind: A1
- Application number: 17/219,604
- Filed: 2021-03-31
- Published: 2021-09-09
- Earliest claimed: 2016-05-12
- Assignees: Weatherford Technology Holdings, LLC
- Applicants: Weatherford Technology Holdings, LLC
- Inventors: Danny W. WAGONER; Tuong T. LE
- Web page: https://patentgrep.com/patent/US20210277727A1

## CPC

- E21B 19/002: {specially adapted for underwater drilling (E21B19/09, E21B19/143 take precedence)}
- E21B 17/01: Risers
- E21B 33/085: {Rotatable packing means, e.g. rotating blow-out preventers}
- E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS

## Abstract

A rotating control device can include a latch assembly with a lock ring that permits displacement of an inner mandrel in one longitudinal direction, and prevents displacement of the inner mandrel in an opposite longitudinal direction. Another rotating control device can include a latch assembly and an equalization valve having an open configuration in which fluid communication is permitted between an exterior and an interior of the rotating control device through the equalization valve, the latch assembly changing from a latched to an unlatched configuration only when the equalization valve is in the open configuration. A method of installing a rotating control device can include releasing a running tool from the rotating control device by producing relative rotation between components of the running tool.

## Claims

### Claim at position 1

1-7. (canceled)

### Claim 8

A rotating control device, comprising:
a latch assembly having a latched configuration and an unlatched configuration; and
an equalization valve having an open configuration in which fluid communication is permitted between an exterior and an interior of the rotating control device through the equalization valve,
wherein the latch assembly changes from the latched configuration to the unlatched configuration only when the equalization valve is in the open configuration.

### Claim 9 (depends on 8)

The rotating control device of claim 8, wherein the latch assembly comprises an inner mandrel and a latch member, the inner mandrel being displaceable in a first longitudinal direction to outwardly extend the latch member, and wherein the equalization valve changes from the open configuration to a closed configuration in response to displacement of the inner mandrel in the first longitudinal direction.

### Claim 10 (depends on 9)

The rotating control device of claim 9, wherein the equalization valve comprises a closing piston, and wherein the inner mandrel displaces the closing piston from the open configuration to the closed configuration.

### Claim 11 (depends on 9)

The rotating control device of claim 9, wherein the inner mandrel is displaceable in a second longitudinal direction, opposite to the first longitudinal direction, to inwardly retract the latch member, and wherein the equalization valve changes from the closed configuration to the open configuration in response to displacement of the inner mandrel in the second longitudinal direction.

### Claim 12 (depends on 8)

The rotating control device of claim 8, further comprising at least one inwardly extending annular seal secured to the latch assembly.

### Claim 13 (depends on 8)

The rotating control device of claim 8, wherein the latch assembly comprises an inner mandrel, a latch member, and a lock ring, the inner mandrel being displaceable in a longitudinal direction to outwardly extend the latch member, and wherein the lock ring permits displacement of the inner mandrel in the longitudinal direction, and prevents displacement of the inner mandrel in an opposite longitudinal direction.

### Claim at position 8

14-20. (canceled)