Automatic chemical injection device for ocean oil field well shutdown

Abstract

The invention discloses an automatic chemical injection device for ocean oil field well shutdown. The automatic chemical injection device for ocean oil field well shutdown is arranged on a structuralframe of a Christmas tree and comprises an energy accumulator of pre-charging chemical agents, a pressurized assembly and an underwater control module, wherein a hydraulic line is arranged at an outlet of the energy accumulator; the pressurized assembly comprises a booster pump and a booster pump control module controlling the booster pump to start and stop, an inlet of the booster pump is connected with the hydraulic line, and a pipeline of an outlet of the booster pump is connected to an oil outlet opening position of a throttle of the Christmas tree; and the underwater control module is connected with the pressurized assembly through a cable, and the underwater control module is further connected with a sea surface operation platform through an umbilical cable. The sea surface operationplatform controls the start and stop of the booster pump through the booster pump control module. According to the automatic chemical injection device for ocean oil field well shutdown, a special-purpose methyl alcohol injection pipeline in the umbilical cable of an ocean oil field can be omitted from systematic design, the total use level of methyl alcohol injection is reduced, and costs of ocean oil field well shutdown operation are saved.

Description

technical field

[0001] The invention relates to the field of oilfield equipment, in particular to an automatic chemical injection device for well shut-in in offshore oilfields. Background technique

[0002] After long-term well shutdown in offshore oilfields, the crude oil inside the production facilities located on the seabed gradually loses to the surrounding seawater environment due to heat, and hydrates will gradually form inside the facility pipelines, causing blockage of oil pipelines. When the well is reopened, internal hydrate blockage will affect the safety of underwater production flow in offshore oilfields. At present, after the well is shut down in the offshore oilfield, the chemical injection module of the offshore operation platform is generally injected into the downstream of the Christmas tree through the chemical injection pipeline of the submarine umbilical cable, so as to suppress the crude oil hydrate in the downstream pipelines such as jumper pipes, mani...

Examples

Embodiment Construction

[0020] The technical solutions of the present invention will be further described below in conjunction with the drawings and embodiments.

[0021] In the offshore oilfield shut-in automatic chemical injection device of the present invention, an accumulator pre-filled with chemical agent is installed on the structural frame of the Christmas tree, and the chemical agent in the accumulator is injected into the span downstream of the oil tree through a pressurized component. Take over the pipes and the internal pipelines of the manifold to achieve the purpose of inhibiting the formation of hydrates in the crude oil inside the facility after the well is shut down. The sea surface operation platform performs automatic control on the automatic chemical injection device of the present invention. After the chemical agent in the accumulator is used up, the accumulator can be recovered and the chemical agent can be refilled.

[0022] Such as figure 1 and figure 2 As shown, the offsho...

technical field

[0001] The invention relates to the field of oilfield equipment, in particular to an automatic chemical injection device for well shut-in in offshore oilfields. Background technique

[0002] After long-term well shutdown in offshore oilfields, the crude oil inside the production facilities located on the seabed gradually loses to the surrounding seawater environment due to heat, and hydrates will gradually form inside the facility pipelines, causing blockage of oil pipelines. When the well is reopened, internal hydrate blockage will affect the safety of underwater production flow in offshore oilfields. At present, after the well is shut down in the offshore oilfield, the chemical injection module of the offshore operation platform is generally injected into the downstream of the Christmas tree through the chemical injection pipeline of the submarine umbilical cable, so as to suppress the crude oil hydrate in the downstream pipelines such as jumper pipes, mani...

Examples

Embodiment Construction

[0020] The technical solutions of the present invention will be further described below in conjunction with the drawings and embodiments.

[0021] In the offshore oilfield shut-in automatic chemical injection device of the present invention, an accumulator pre-filled with chemical agent is installed on the structural frame of the Christmas tree, and the chemical agent in the accumulator is injected into the span downstream of the oil tree through a pressurized component. Take over the pipes and the internal pipelines of the manifold to achieve the purpose of inhibiting the formation of hydrates in the crude oil inside the facility after the well is shut down. The sea surface operation platform performs automatic control on the automatic chemical injection device of the present invention. After the chemical agent in the accumulator is used up, the accumulator can be recovered and the chemical agent can be refilled.

[0022] Such as figure 1 and figure 2 As shown, the offsho...

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