초록 ▼

A lightweight intervention system is described for use with single bore and dual bore intervention operations and which can be used with both horizontal trees and conventional trees and with wellheads without trees mounted thereon. The system is based on a two-part intervention apparatus; the lower

A lightweight intervention system is described for use with single bore and dual bore intervention operations and which can be used with both horizontal trees and conventional trees and with wellheads without trees mounted thereon. The system is based on a two-part intervention apparatus; the lower part provides the pressure control and consists of an xmas tree or wellhead connector and structural housing in which a sub-sea test tree is located and is coupled to the xmas tree and an upper part, a disconnectable section, attaches to the lower part and consists of a sub-sea test tree latch housed within an xmas tree connector and additional pressure control equipment as required. This general structure can be configured in various ways to create different embodiments for use with horizontal trees and conventional trees which have a single through-bore requirement and a dual bore requirement respectively. With horizontal trees access to the annulus space depends on the type of proprietary valve system used in the tree. The intervention apparatus may also be used directly on wellheads where the tree has been removed.

대표청구항 ▼

[ I claim:] [1.] Lightweight intervention apparatus for use with a horizontal tree having a main bore and a separate annulus bore, said intervention apparatus comprising:first connection means for connecting said intervention apparatus to said horizontal tree, housing means coupled to said first con

[ I claim:] [1.] Lightweight intervention apparatus for use with a horizontal tree having a main bore and a separate annulus bore, said intervention apparatus comprising:first connection means for connecting said intervention apparatus to said horizontal tree, housing means coupled to said first connection means, second connection means coupled to said housing means, said second connection means having a quick-connect/quick-disconnect facility, sub-sea test tree means located in said housing means in proximity to said second connection means, tree cap intervention tool means disposed in said housing means beneath said sub-sea test tree, said intervention apparatus providing main bore communication from a riser to said horizontal tree, said tree cap intervention tool means having valve means for providing annulus communication from said annulus bore in said horizontal tree.