Device for installation and flow test of subsea completions
AssigneeFMC Technologies, Inc.
InventorsNicholas Gatherar, Graeme John Collie
Life of this patent
Estimating the term…
Abstract
A running string for a subsea completion comprises an upper section (70) which may be a coiled tubing (CT) injector unit as shown, or a wireline lubricator (FIG. 8). A lower section (60) provides wireline/CT access to production/annulus bores of a tubing hanger (not shown) attached to tubing hanger running tool (62). A flow package (64) in the lower section (60), together with BOP pipe rams (86) and annular seal (88), directs production and annulus fluid flows/pressures to the BOP choke/kill lines (78/76). The upper and lower sections allow installation and pressure/circulation testing of, and wireline/CT access to, a subsea completion, without the use of a high pressure riser.
Claims17
A flow package for instalation and testing of subsea completions having an elongate body (60) connected to or comprising a tubing hanger running tool (62);
- the flow package body (60) being engageable by pipe rams or annular seals (86, 88) of a BOP (90) in use;
- a first end (80, 82) of a fluid flow conduit (94, 98) extending through the tubing hanger running tool for connection with a production or annulus bore in a tubing hanger;
- a second end of the fluid flow conduit being connected to a port (96, 100) in the side or upper end of the flow package body, whereby a sealed flow connection is formed between a choke and/or kill line (76, 78) of the BOP and the port;
- characterised in that the flow package comprises a wireline lubricator (68) or coiled tubing injector (70) installable within a marine riser (128) and mounted to the upper end of the flow package body (60), thereby eliminating the need for a high pressure riser.
A flow package as defined in any preceding claim, characterised in that the flow conduit(s) (94, 98) contain(s) valves (102, 104, 108, 114, 110) providing flow control and wireline/CT shearing capabilities.
A flow package as defined in any preceding claim characterised in that the flow conduit(s) (94, 98) contain(s) provision for wireline installed plugs (158, 159).
A flow package as defined in any preceding claim, characterised in that the lubricator (68) or coiled tubing injector (70) may be so mounted in the alternative.
A flow package as defined in any preceding claim, characterised in that the coiled tubing injector (70) and/or wireline lubricator (68), where present, are located at or near the sea surface, connected to the flow package body (60), or bore selector (116) where present, by drill pipe (168).
A flow package as defined in any preceding claim, characterised in that a service line umbilical (148, 150) to the flow package (60) is located in use outside a marine riser (128) connected to the BOP and is connectable and disconnectable from the flow package (60) by a remotely actuable penetrator (170) mounted on the BOP.
A flow package as defined in any preceding claim, characterised in that hydraulic fluid power is supplied to the flow package, for operating associated actuators, via an open port (206) in an upper part (202) of the flow package, whereby in use BOP closure elements can be closed and sealed around the flow package body to define a pressurisable space in communication with the open port (206).
A flow package as defined in any preceding claim, characterised in that feedback signals are sent from the flow package to the surface in use, to provide information as to the operative state of valves and actuators.
Dependencies are inferred from the claim text.