Tubing pressure insensitive failsafe wireline retrievable safety valve

Patent metadata

Field	Value
Publication number	US-2019376366-A1
Application number	US-201916431373-A
Country	US
Kind code	A1
Filing date	Jun 4, 2019
Priority date	Jun 6, 2018
Publication date	Dec 12, 2019
Grant date	—

Abstract

A tubing pressure insensitive failsafe wireline retrievable safety valve, borehole system having the valve and method of operation of the valve. The valve includes 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 side and a pressure side, and a fluid pathway between a potential leak site for the valve and the pressure side of the piston. A temporary sealing member is in the fluid pathway between the potential leak site and the pressure side of the piston. The method includes disposing the valve at a selected location and removing at least a portion of the temporary sealing member from the fluid pathway after landing the wireline retrievable safety valve at the selected location.

First claim

What is claimed is:

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 side and a pressure side; and a fluid pathway between a potential leak site for the valve and the pressure side of the piston.

2 . The valve as claimed in claim 1 further comprising a temporary sealing component disposed in the fluid pathway between the potential leak site and the pressure side of the actuation piston.

3 . The valve as claimed in claim 2 wherein the temporary sealing component includes a piston and seal positioned to exit a bore in which the seal is disposed.

4 . The valve of claim 2 wherein the temporary sealing component is permanently disabled after the valve is set downhole.

5 . The valve of claim 2 wherein at least a portion of the temporary sealing component dissolves due to fluid exposure.

6 . The valve of claim 5 wherein the temporary sealing member dissolves via a chemical reaction with a reactive environment contained within the fluid pathway.

7 . The valve of claim 5 wherein the at least one portion is made of a powder metal compact.

8 . The valve of claim 5 wherein the fluid pathway is filled with a chemically reactive fluid prior to running the valve downhole.

9 . The valve of claim 2 wherein the temporary sealing component is removed from the fluid pathway after the valve is landed in its operable location downhole.

10 . The valve of claim 2 , wherein the temporary sealing component comprising a material that is solid below a specified temperature of the valve and is liquid at or above the specified temperature.

11 . The valve of claim 1 further comprising a pressure chamber at the pressure side of the actuation piston.

12 . The valve of claim 2 , further comprising a pressure chamber at the pressure side of the actuation piston, wherein the temporary sealing component is configured to vent to the pressure chamber upon a selected pressure from the potential leak site.

13 . The valve of claim 11 wherein the pressure chamber is partially defined by a seal between the housing and the flow tube.

14 . The valve of claim 3 wherein the flow tube includes an end defining a space between the flow tube and a flapper, the space dimensioned to ensure that the an actuation pressure at an actuation side of the actuation piston communicates a fluid pressure therein to the pressure chamber prior to the flow tube contacting the flapper.

15 . The valve of claim 1 wherein the flow tube and the housing are releasably connected together by a release member.

16 . The valve of claim 1 , wherein the fluid pathway is in fluid communication with a balance line in order to supply a balance pressure to the pressure side of the actuation piston.

17 . The valve as claimed in 16 wherein the balance line extends through a tubular string to the valve.

18 . The valve of claim 1 , further comprising a running tool configured to hold the flow tube in a closed position while running downhole.

19 . The valve of claim 1 , further comprising an annular hydraulic control chamber disposed between potential leak sites.

20 . The valve of claim 1 , further comprising a pressure communication system including a first tubular threadingly connected to a second tubular and a communication pathway that passes from within a wall of the first tubular to within a wall of the second tubular across a joint.

21 . The valve of claim 20 , wherein the pressure communication system partially defines the fluid pathway between a potential leak site for the valve and the pressure side of the actuation piston.

22 . 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 side and a pressure side; and a fluid pathway between a potential leak site for the valve and the pressure side of the piston.

23 . A method of operating a tubing pressure insensitive failsafe wireline retrievable safety valve, comprising:
disposing the valve at a selected location, the 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 side and a pressure side;
a fluid pathway between a potential leak site for the valve and the pressure side of the piston; and
a temporary sealing member in the fluid pathway between the potential leak site and the pressure side of the piston; and
removing at least a portion of the temporary sealing member from the fluid pathway after landing the wireline retrievable safety valve at the selected location.

24 . The method of claim 23 , wherein the temporary sealing member includes a dissolvable member and removing at least the portion of the temporary sealing member further comprising dissolving the dissolvable member.

25 . The method of claim 23 , wherein the removing at least a portion of the temporary sealing member allows fluid communication between the fluid pathway and the pressure side of the piston.

26 . The method of claim 23 , wherein the removing at least a portion of the temporary sealing member exposes the pressure side of the piston to a pressure in a balance line.

27 . The method of claim 23 , wherein the temporary sealing component comprising a material that is solid below a selected temperature and is liquid at or above the selected temperature, further comprising raising the temperature of the material above the selected temperature.

Assignees

• Burris John
• Edwards Jason
• Miller Wade
• Garr Ronald J
• Baker Hughes A Ge Co Llc

Inventors

• Burris John
• Edwards Jason
• Miller Wade
• Garr Ronald J

Classifications

• E21B34/105 Primary

  retrievable, e.g. wire line retrievable, i.e. with an element which can be landed into a landing-nipple provided with a passage for control fluid · CPC title

• E21B34/063 Primary

  Valve or closure with destructible element, e.g. frangible disc (E21B34/103 takes precedence) · CPC title

• E21B34/10

  operated by control fluid supplied from outside the borehole · CPC title

• E21B2034/005

  Fixed Constructions · mapped topic

• E21B34/14

  operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools {(E21B34/066 takes precedence)} · CPC title