Horizontal vertical deepwater tree

Patent metadata

Field	Value
Publication number	US-9702212-B2
Application number	US-201314438850-A
Country	US
Kind code	B2
Filing date	Nov 6, 2013
Priority date	Nov 6, 2012
Publication date	Jul 11, 2017
Grant date	Jul 11, 2017

Abstract

A subsea hydrocarbon production system comprises a tubing hanger which is positioned at an upper end of a well bore, a tubing string which extends from the tubing hanger into the well bore and is fluidly connected to the tubing hanger production bore, and a christmas tree which is positioned above the tubing hanger. The christmas tree comprises a production bore which is fluidly connected to the tubing hanger production bore, a production outlet which is connected to the production bore, a first barrier element which is positioned in the production outlet, and a first closure device which is positioned in the production bore above the production outlet. In this manner access from above the christmas tree through the production bore does not require passage through a barrier element.

First claim

What is claimed is:

1. A subsea hydrocarbon production system which comprises:
a tubing hanger which is positioned at an upper end of a well bore, the tubing hanger including a tubing hanger production bore;
a tubing string which extends from the tubing hanger into the well bore and is fluidly connected to the tubing hanger production bore;
a christmas tree which is positioned above the tubing hanger and which comprises:
a production bore which is fluidly connected to the tubing hanger production bore;
a production outlet which is connected to the production bore;
a first barrier element which is positioned in the production outlet; and
a first closure device which is positioned in the production bore above the production outlet;

wherein access from above the christmas tree through the production bore does not require passage through a barrier element;
a downhole equipment device which is positioned in the tubing string, the downhole equipment device being connected to a suspension string which is connected to a downhole equipment hanger that is secured to the production bore above the production outlet;
wherein the downhole equipment device is installed through the first closure device.

2. The subsea hydrocarbon production system of claim 1 , further comprising:
a second closure device which is positioned in the production bore below the production outlet;
wherein the downhole equipment device is installed through both the first and second closure devices.

3. The subsea hydrocarbon production system of claim 1 , wherein an end of the suspension string located in the downhole equipment hanger is connected to an external power supply by a wet mate connector.

4. The subsea hydrocarbon production system of claim 3 , wherein the wet mate connector is connected to a power and/or utility feed through in a tree cap which is secured and sealed to the top of the christmas tree.

5. The subsea hydrocarbon production system of claim 4 , wherein the downhole equipment hanger is positioned below the first closure device and the wet mate connector is configured to extend through the first closure device.

6. The subsea hydrocarbon production system of claim 3 , wherein the end of the suspension string is connected to a wet mate connector half which is configured to be engaged by a radial wet mate connector half mounted on the christmas tree.

7. A subsea hydrocarbon production system which comprises:
a tubing hanger which is positioned at an upper end of a well bore, the tubing hanger including a tubing hanger production bore;
a tubing string which extends from the tubing hanger into the well bore and is fluidly connected to the tubing hanger production bore;
a christmas tree which is positioned above the tubing hanger and which comprises:
a production bore which is fluidly connected to the tubing hanger production bore;
a production outlet which is connected to the production bore;
a first barrier element which is positioned in the production outlet; and
a first closure device which is positioned in the production bore above the production outlet;

wherein access from above the christmas tree through the production bore does not require passage through a barrier element;
a downhole equipment device which is positioned in the tubing string, the downhole equipment device being connected to a suspension string which is connected to a downhole equipment hanger that is secured to the tubing hanger production bore;
wherein the downhole equipment hanger is located below the first closure device.

8. The subsea hydrocarbon production system of claim 7 , further comprising:
a second closure device which is positioned in the production bore below the production outlet;
wherein the downhole equipment hanger is located below both the first and second closure devices.

9. The subsea hydrocarbon production system of claim 7 , wherein the downhole equipment hanger comprises a number of axial through bores which permit the passage of fluid through the tubing hanger production bore.

10. The subsea hydrocarbon production system of claim 7 , wherein an end of the suspension string located in the downhole equipment hanger is connected to an external power supply by a wet mate connector.

11. The subsea hydrocarbon production system of claim 10 , wherein the end of the suspension string is connected to a wet mate connector half which is configured to be engaged by a radial wet mate connector half mounted on the christmas tree.

12. The subsea hydrocarbon production system of claim 7 , wherein an end of the suspension string located in the downhole equipment hanger is connected via a suspension string extender to a termination head which in turn is connected to an external power supply by a wet mate connector.

13. The subsea hydrocarbon production system of claim 12 , wherein the wet mate connector is connected to a power and/or utility feed through in a tree cap which is secured and sealed to the top of the christmas tree.

14. The subsea hydrocarbon production system of claim 13 , wherein the downhole equipment hanger is positioned below the first closure device and the wet mate connector is configured to extend through the first closure device.

15. The subsea hydrocarbon production system of claim 12 , wherein the termination head is connected to a wet mate connector half which is configured to be engaged by a radial wet mate connector half mounted on the christmas tree.

16. A subsea hydrocarbon production system which comprises:
a tubing hanger which is positioned at an upper end of a well bore, the tubing hanger including a tubing hanger production bore;
a tubing string which extends from the tubing hanger into the well bore and is fluidly connected to the tubing hanger production bore;
a christmas tree which is positioned above the tubing hanger and which comprises:
a production bore which is fluidly connected to the tubing hanger production bore;
a production outlet which is connected to the production bore;
a first barrier element which is positioned in the production outlet; and
a first closure device which is positioned in the production bore above the production outlet;

wherein access from above the christmas tree through the production bore does not require passage through a barrier element;
a hydraulic submersible pump which is positioned in the tubing string, the pump including a fluid power conduit which is connected to a downhole equipment hanger that is secured to the production bore above the production outlet and below the first closure device; and
a pump conduit having a first end which is connectable to a source of pressurized fluid and a second end which is connected to the production bore below the first closure device and above the downhole equipment hanger;
wherein with the first closure device closed, pressurized fluid is communicated through the pump conduit, the production bore and the fluid power conduit to activate the pump.

17. The subsea hydrocarbon production system of claim 16 , wherein fluid exhausted by the pump exits the production bore through the production outlet.

18. The subsea hydrocarbon production system of claim 16 , further comprising a pump valve for controlling the flow of pressurized fluid through the pump conduit.

19. A subsea hydrocarbon production system which comprises:
a tubing hanger which is positioned at an upper end of a well bore, the tubing hanger including a tubing hanger production bore;
a tubing string which extends from the tubing hanger into the well bore and is flui

Assignees

• Fmc Tech Inc

Inventors

• Breda Jøren
• Åsli Egil
• Smedstad Eric R
• Murphy Richard
• Riley Paul L

Classifications

• E21B43/128

  Adaptation of pump systems with down-hole electric drives · CPC title

• E21B33/0385 Primary

  electrical connectors · CPC title

• E21B43/129

  Adaptations of down-hole pump systems powered by fluid supplied from outside the borehole (gas-lift E21B43/122; jet pumps E21B43/124) · CPC title

• E21B34/04

  in underwater well heads · CPC title

• E21B33/035 Primary

  specially adapted for underwater installations (E21B33/043, E21B33/064, E21B33/076 take precedence) · CPC title