Device for monitoring, preventing and treating hydrate in throttling well

Abstract

The invention discloses a device for monitoring, preventing and treating throttled underground hydrates. The device comprises a throttler, a pneumatic generator, a heater and a pressure change and temperature change monitoring device, the ultrahigh pressure difference can be formed at the two ends of the natural gas well bottom throttler, the airflow speed can reach the sound velocity, the front and back pressure difference of the throttler is used for generating electricity for the pneumatic generator, and the provided electric energy is continuously provided for other equipment at the well bottom. The electric energy is mainly used for heating the heater and supplying energy to the pressure change and temperature change monitoring device; and the natural gas in the throttling process is heated to the temperature above the temperature of a hydrate formation point, so that the accident rate caused by formation of the hydrate at the bottom of the well can be effectively reduced, and a solution is provided for energy conservation and efficiency improvement of an oil field. In addition, the instrument transmits the temperature and the pressure of the shaft bottom to the ground through ultrasonic waves in a shaft solid, and after a ground receiver receives the temperature and the pressure, a computer decodes and calculates to confirm whether the risk of hydrate generation exists in the shaft or not.

Description

technical field [0001] The invention relates to the technical field of natural gas well production, in particular to a device for monitoring and preventing hydrates in throttling wells. Background technique [0002] In the production of natural gas wells, since the high pressure or abnormal high pressure of the gas reservoir poses risks to the wellhead equipment, downhole throttling is often used to reduce the wellhead pressure. The downhole throttling technology is to place a certain size throttle in the tubing at a certain depth downhole to realize throttling and pressure reduction in the wellbore, convert pressure energy into kinetic energy, increase fluid flow velocity, and keep the throttled fluid at critical flow. state, reducing the impact of wellhead pressure fluctuations on the bottom of the well. Existing restrictors include oil nipples, central pipes, trustees, springs, lower propellers, upper propellers, sealing rubber cartridges, slips and other parts. When th...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the existing choke is easy to produce low-temperature area in the choked wellbore due to the Joule-Thomson effect in the choke process, and the natural gas-water mixture is easy to produce hydrate, which causes the problem of blockage of the whole well and production safety. , providing a device for hydrate monitoring and prevention in throttling wells

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