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Utility skid tree support system for subsea wellhead

a technology for supporting systems and wellheads, applied in the field of subsea wellheads, can solve problems such as cumbersome utility skids, low installation efficiency, and even lack of well pressur

Undetermined Publication Date: 2008-06-05
VETCO GRAY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In very deep water, the well may have sufficient pressure to cause the well fluid to flow to the tree but not enough to flow from the sea floor to the processing facility.
In other cases, the well may even lack sufficient pressure to flow well fluid to the sea floor.
Downhole electrical submersible pumps have been used for many years in surface wells, but because of periodic required maintenance, are not normally employed downhole in a subsea well.
However, because of the pump size, installation expense and technical difficulties, such installations are rare.
Utility skids are cumbersome and manipulating them with respect to the well can be very difficult if not hazardous to operators and the well installation itself.

Method used

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  • Utility skid tree support system for subsea wellhead
  • Utility skid tree support system for subsea wellhead
  • Utility skid tree support system for subsea wellhead

Examples

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Embodiment Construction

[0014]Referring to FIGS. 1-3, embodiments of a system, method and apparatus for a utility skid tree support system for subsea wellheads are shown. A wellhead housing 11 is located at the upper end of a subsea well. Wellhead housing 11 is a large tubular member mounted to a conductor pipe that extends to a first depth in the well.

[0015]A subsea Christmas or production tree 13, such as a horizontal or spool tree, is secured to the upper end of wellhead housing 11 by a conventional connector. Tree 13 has a bore 15 that contains a tubing hanger 17. Tubing hanger 17 supports a string of tubing 19 that extends into the well for the flow of production fluid. Tubing 19 registers with a production passage 21 that extends through tubing hanger 17. A lateral production port 23 extends from production passage 21 through a production master valve 25 within tree 13.

[0016]Production passage 21 of tubing hanger 17 has a crown plug profile 31 located above lateral production port 23. Profile 31 is a...

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Abstract

A utility skid tree system for subsea wellheads enables a tree to be mounted by and interface with utility skids. Production bore access is provided through an extended production wing block. The system reacts and transfers installation loads and potential snag loads to the conductor. The tree accepts skids for flow boosting, metering, water-oil separation, etc. A conventional choke may be fitted outboard of the utility insert profile.

Description

[0001]This patent application is a continuation-in-part (CIP) of U.S. patent application Ser. No. 11 / 595,444, filed Nov. 9, 2006, having Attorney Docket No. V2003047A, and entitled Tree Mounted Well Flow Interface Device.BACKGROUND OF THE INVENTION[0002]1. Technical Field[0003]The present invention relates in general to subsea wellheads and, in particular, to an improved system, method, and apparatus for a utility skid tree support system for subsea wellheads.[0004]2. Description of the Related Art[0005]In one type of offshore well production, a subsea production tree is installed at the sea floor. The tree may be connected by a flowline jumper to a subsea manifold, which may be connected to other subsea trees in the vicinity. A production riser may extend from the subsea manifold or from an individual tree to a processing facility, normally a floating platform. The well formation pressure is normally sufficient to cause the well fluid to flow up the well to the tree, and from the t...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): E21B7/12
CPCE21B43/121E21B33/038E21B33/035
Inventor WHITE, PAUL W.
Owner VETCO GRAY
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