Chemical deepwater stimulation systems and methods
OwnerDavid Wrightinventor
Life of this patent
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Abstract
Systems and methods for performing operations on a well include first and second flow control devices positioned between upper and lower sections of a conduit. An upper connector assembly engaged with the upper section includes connectors adapted for connection to a chemical stimulation device, a blowout preventer, or other well intervention apparatuses. A lower connector assembly engaged with the lower section includes connectors adapted for connection to a chemical stimulation device, a running tool, wellbore conduits, or other well intervention apparatuses. The two connector assemblies, above and below the flow control devices, enable sequential or simultaneous operations to be performed, and can enable operations to be performed independent of the state of the flow control devices.
Claims24
A subsea system for performing operations on a subsea well, the subsea system comprising:
- a conduit having an upper section and a lower section;
- a first flow control device positioned between the upper section and the lower section, wherein the first flow control device is powered by hydraulic fluid supplied through at least one conduit;
- a second flow control device positioned beneath the first flow control device and between the upper section and the lower section, wherein the second flow control device is powered by hydraulic fluid supplied through the at least one conduit;
- an upper connector assembly engaged with the upper section, wherein the upper connector assembly comprises:
- a first flow cross member in fluid communication with the first flow control device;
- a first connector adapted for connection to a chemical stimulation device;
- and
- a top connector adapted for engaging a subsea blowout preventer, for performing well intervention operations therethrough, or combinations thereof;
- and
- a lower connector assembly engaged with the lower section, wherein the lower connector assembly comprises:
- a second flow cross member in fluid communication with the second flow control device;
- a second connector adapted for connection to a chemical stimulation device;
- and
- a bottom connector adapted for subsea engagement with a running tool, a wellbore conduit, a subsea blowout preventer, or combinations thereof,
- wherein at least one of the first flow control device or the second flow control device is actuatable using corresponding actuators powered by the hydraulic fluid through the at least one conduit via at least one junction plate.
A method for performing operations on a subsea well, the method comprising the steps of:
- providing a conduit in communication with a subsea well, wherein the conduit comprises at least two flow control devices, wherein the at least two flow control devices are powered by hydraulic fluid supplied through at least one hydraulic conduit;
- engaging a first operating apparatus and a chemical stimulation device with an upper section of the conduit, above the at least two flow control devices;
- engaging a second operating apparatus with a lower section of the conduit below the at least two flow control devices;
- performing at least a first operation through the conduit and the at least two flow control devices using the first operating apparatus, the chemical stimulation device, or combinations thereof without requiring removal of the first operating apparatus, the chemical stimulation device, or combinations thereof;
- performing an additional operation through the conduit and the at least two flow control devices using the first operating apparatus, the chemical stimulation device, or combinations thereof, without requiring the removal of the first operating apparatus, the chemical stimulation device, and the second operating device;
- isolating the upper section from the lower section using the at least two flow control devices;
- and
- performing a second operation through the conduit using the second operating apparatus.
A subsea system for performing operations on a subsea well, the subsea system comprising:
- a conduit having an upper section and a lower section and a bore extending therethrough;
- at least one flow control device positioned between the upper section and the lower section, wherein the at least one flow control device is powered by hydraulic fluid supplied through a hydraulic conduit, wherein the at least one flow control device is operable to open and close the bore;
- a first flow cross member in fluid communication with the upper section and having a first primary bore extending therethrough in communication with the bore of the conduit, wherein the first flow cross member comprises at least two connectors each adapted for connection to a chemical stimulation device, a subsea blowout preventer, a subsea well tree tool, a well intervention apparatus, or combinations thereof;
- a second flow cross member in fluid communication with the lower section and having a second primary bore extending therethrough in communication with the bore of the conduit, wherein the second flow cross member comprises at least two connectors each adapted for connection to a chemical stimulation device, a subsea running tool, a subsea well tree tool, a well intervention apparatus, or combinations thereof;
- and
- a plurality of accumulators and at least two barrier valves, wherein the plurality of accumulators can actuate the at least two barrier valves between at least one emergency quick disconnect connector and the at least one flow control device.
Dependencies are inferred from the claim text.