Subsea well with retrievable piping deck
First Claim
1. A subsea well, the combination comprising:
- a template installed on the seabed and having a plurality of guide sleeves oriented over a plurality of wells formed in the seabed;
a plurality of wellheads, each installed in one of said guide sleeves;
a retrievable piping deck having a plurality of flow lines coupled thereto and located on the top of said template;
a plurality of Christmas trees, each installed on one of said wellheads;
means, including vertically oriented connectors, for coupling each of said Christmas trees to one of said flow lines;
a fluid manifold installed on said template;
means, including vertically oriented connectors, for coupling each of said flow lines to said manifold; and
a main flow line coupled to said manifold and extending from said template to the surface of the sea.
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Accused Products
Abstract
An apparatus and method for drilling and completing a subsea well located at the seabed using a retrievable piping deck. The apparatus includes a template supported on the seabed, the retrievable piping deck supported on the template, a plurality of wellheads supported on the template and a plurality of Christmas trees supported on the wellheads. The piping deck has preinstalled flow lines and hydraulic lines to conduct well fluid from the Christmas trees to the surface and to conduct hydraulic control fluid from the surface to the trees. In addition to the Christmas trees, a well fluid manifold and a gaseous-liquid component separator can be supported on the template. The fluid connections between the Christmas trees and the hydraulic and flow lines and between the manifold and separator and the hydraulic and flow lines are accomplished by vertically oriented stab-in connectors. After installation of the template and drilling of the wells, the piping deck is lowered independently to the template and coupled thereto and then the Christmas trees and manifold-separator are lowered to the template and into fluid communication with the piping deck hydraulic and flow lines.
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Citations
12 Claims
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1. A subsea well, the combination comprising:
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a template installed on the seabed and having a plurality of guide sleeves oriented over a plurality of wells formed in the seabed; a plurality of wellheads, each installed in one of said guide sleeves; a retrievable piping deck having a plurality of flow lines coupled thereto and located on the top of said template; a plurality of Christmas trees, each installed on one of said wellheads; means, including vertically oriented connectors, for coupling each of said Christmas trees to one of said flow lines; a fluid manifold installed on said template; means, including vertically oriented connectors, for coupling each of said flow lines to said manifold; and a main flow line coupled to said manifold and extending from said template to the surface of the sea. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of drilling and completing a subsea well, comprising the steps of
lowering a template to the seabed, drilling a plurality of wells in the seabed through the template, lowering a plurality of wellheads to the template and installing the wellheads over the wells, lowering a retrievable piping deck onto the template, the piping deck carrying flow lines with upwardly facing connectors thereon, lowering a plurality of Christmas trees to the template, each having a flow line with a downwardly facing connector thereon, coupling the piping deck flow lines and Christmas tree flow lines via their connectors by downward movement of the Christmas trees onto the wellheads, and conducting well fluid from the wells, through the wellheads, through the Christmas trees, and through the connected Christmas tree and piping deck flow lines to the surface of the sea.
Specification