Closed water sealed well and drainage system for oil and gas field with sulfur

Abstract

The invention discloses a closed water sealed well and drainage system for an oil and gas field with sulfur. The closed water sealed well comprises a vertical pipe, a first branch pipe, a second branch pipe and a blind flange, wherein the first branch pipe is communicated with a water inlet pipe, and wherein the second branch pipe is communicated with a water outlet pipe; a first bypass orifice and a second bypass orifice which are located at the opposite two sides of the vertical pipe are formed in the pipe wall of the vertical pipe, and the second bypass orifice is located on the first bypass orifice; the first branch pipe is communicated with the vertical pipe through the first bypass orifice, the second branch pipe is communicated with the vertical pipe through the second bypass orifice, and the pipe section between the top end of the vertical pipe and the second bypass orifice is an inspection section; the pipe section between the first bypass orifice and the second bypass orifice is a water sealing section; the pipe section under the first bypass orifice is a mud precipitation section; the blind flange is connected with the top end of the vertical pipe in a sealing mode. Therefore, toxic gases in the drainage system are kept in a sealed pipeline and do not leak. When one place in the drainage system burns, the water sealing section can prevent fire from spreading, so that the safety of operators on the scene is guaranteed, and the environment pollution is reduced.

Description

technical field [0001] The invention relates to the technical field of oilfield equipment, in particular to a closed water-sealed well and a drainage system for sulfur-containing oil and gas fields. Background technique [0002] At present, the collection of sulfur-containing sewage in sour natural gas purification plants in most oil and gas fields adopts gravity flow transportation, that is, the sulfur-containing sewage flows along the pipelines in the drainage network under the action of its own gravity and is discharged. This collection method needs to use inspection wells and water seal wells to connect the drainage pipes. [0003] There are toxic gases in the drainage pipes, such as hydrogen sulfide. Hydrogen sulfide is a colorless gas and is a flammable hazardous chemical. If it overflows from the drainage pipes, it will mix with air to form an explosive mixture, which will cause combustion when exposed to open flames or high heat. Explosions, fires, poisoning and oth...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a closed water-sealed well and a drainage system for sulfur-containing oil and gas fields to overcome the defects of the prior art that the water-sealed well is not tightly sealed and has poor safety

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