Magnetic targeted hydrate inhibitor transport system and method

Abstract

The invention discloses a magnetic targeted hydrate inhibitor transport system and method, and belongs to the technical field of flow guarantee of underwater production systems in deep water oil gas and hydrate resource development. The system can achieve targeted transport and controllable release of hydrate inhibitors and ensure accurate and efficient prevention and control of hydrates, and comprises a storage tank, an injection pump, a controller, a separator and a recoverer which are positioned above the water surface, wherein the storage tank communicates with the injection pump, the injection pump communicates with an underwater production tree and provides a magnetic targeted hydrate inhibitor for the underwater production tree, the injection pump is connected with the controller, the separator communicates with the underwater production tree, one end of the recoverer communicates with the separator to obtain liquid in the separator, and the other end of the recoverer communicates with the storage tank.

Description

technical field [0001] The invention belongs to the technical field of flow guarantee for underwater production systems in the development of deep-water oil and gas and hydrate resources, and in particular relates to a magnetically targeted hydrate inhibitor transport system and method. Background technique [0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] In the development of deep-water oil, gas and hydrate resources, the underwater production system must effectively deal with the risk of hydrate flow obstruction. Hydrate blockage in any part of the production system will significantly affect the normal operation of the entire production system. Hydrate inhibitor injection is a necessary means of hydrate control in the production system. Subsea production systems are complex, including subsea wellheads, subsea trees, jumper pipes, umbilical cables, subsea manifolds, ...

AI Technical Summary

Problems solved by technology

[0004] However, the inventors found that under the existing hydrate control technology, the transportation of hydrate inhibitors is completely dependent on the multiphase flow system in the production system

On the one hand, hydrate inhibitors cannot be transported to areas with poor fluidity, such as dead-leg sections; Condensation at the top of the pipe and the inhibitor cannot condense synchronously

The transport effect of hydrate inhibitors under the existing technology is poor, and it is difficult to match the transport degree of hydrate inhibitors in the underwater production system with the degree of hydrate risk

[0005] In order to achieve an effective control concentration, a large dose of injection is currently used, resulting in the disadvantage of "overall excess and local deficiency" in the injection of hydrate inhibitors

The overall excess will not only increase the operating and economic costs, but also affect the characteristics of the process parameters of the production system; the partial deficiency will lead to prominent local risks and seriously affect the control effect of hydrate inhibitors

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