# US 2019/0376367 A1 · Tubing pressure insensitive failsafe wireline retrievable safety valve

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- Number: US 2019/0376367 A1
- Document ID: US20190376367A1
- Status: Published application
- Kind: A1
- Application number: 16/001,604
- Filed: 2018-06-06
- Published: 2019-12-12
- Earliest claimed: 2018-06-06
- Assignees: Baker Hughes, A Ge Company, LLC
- Inventors: John Burris; Jason Edwards
- Web page: https://patentgrep.com/patent/US20190376367A1

## CPC

- E21B 34/106: {the retrievable element being a secondary control fluid actuated valve landed into the bore of a first inoperative control fluid actuated valve}
- E21B 34/14: operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools {(E21B34/066 takes precedence)}
- E21B 34/063: {Valve or closure with destructible element, e.g. frangible disc (E21B34/103 takes precedence)}
- E21B 34/10: operated by control fluid supplied from outside the borehole
- E21B 2200/05: Flapper valves
- E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS

## Abstract

A tubing pressure insensitive failsafe wireline retrievable safety valve including a tool housing, a flow tube disposed within the tool housing, an actuation piston disposed in the tool housing and operably connected to the flow tube, the actuation piston having an actuation pressure side and a relatively lower pressure chamber side, a fluid pathway between a potential leak site for the valve and the relatively lower pressure chamber side of the piston. A borehole system having a tubing pressure insensitive failsafe wireline retrievable safety valve. A tubing pressure insensitive failsafe wireline retrievable safety valve.

## Claims

### Claim 1

A tubing pressure insensitive failsafe wireline retrievable safety valve\ comprising:
a tool housing;
a flow tube disposed within the tool housing;
an actuation piston disposed in the tool housing and operably connected to the flow tube, the actuation piston having an actuation pressure side and a relatively lower pressure chamber side;
a fluid pathway between a potential leak site for the valve and the relatively lower pressure chamber side of the piston.

### Claim 2 (depends on 1)

The valve as claimed in claim 1 wherein the fluid pathway comprises a failure piston disposed between the potential leak site and the relatively lower pressure side of the piston.

### Claim 3 (depends on 2)

The valve as claimed in claim 2 wherein the failure piston includes a seal positioned to exit a bore in which the failure piston is disposed prior to the flow tube contacting a flapper, in use.

### Claim 4 (depends on 1)

The valve as claimed in claim 1 wherein the flow tube includes an end defining a space between itself and a flapper, the space dimensioned to ensure that the fluid communicates fluid pressure therein to the relatively lower pressure side of the piston prior to the flow tube contacting the flapper.

### Claim 5 (depends on 1)

The valve as claimed in claim 1 wherein the valve further includes a relatively lower than ambient pressure chamber.

### Claim 6 (depends on 5)

The valve as claimed in claim 5 wherein the chamber is partially defined by seals between the housing and the flow tube.

### Claim 7 (depends on 5)

The valve as claimed in claim 5 wherein the chamber is an atmospheric chamber.

### Claim 8 (depends on 2)

The valve as claimed in claim 2 wherein the fluid pathway includes an opening and a port both fluidically connected to a conduit, the conduit in pressure communication with the failure piston.

### Claim 9 (depends on 1)

The valve as claimed in claim 1 wherein the flow tube and the housing are releasably connected together by a release member.

### Claim 10 (depends on 9)

The valve as claimed in claim 9 wherein the release member is a shear member.

### Claim 11

A borehole system having a tubing pressure insensitive failsafe wireline retrievable safety valve comprising:
a tool housing;
a flow tube disposed within the tool housing;
an actuation piston disposed in the tool housing and operably connected to the flow tube, the actuation piston having an actuation pressure side and a relatively lower pressure chamber side;
a fluid pathway between a potential leak site for the valve and the relatively lower pressure chamber side of the piston.

### Claim 12 (depends on 1)

The valve as claimed in claim 1 wherein the potential leak site is a seal.

### Claim 13

A tubing pressure insensitive failsafe wireline retrievable safety valve comprising:
a tool housing;
a flow tube disposed within the tool housing;
a failure piston disposed in the tool housing and fluidly coupled to an opening and a port that are segregated during use from ambient fluid by first seals and second seals respectively, the piston configured to vent to a chamber upon a selected pressure from the opening and/or the port acting on the failure piston.