Gas well full-life-cycle downhole throttling production device and using method thereof

Abstract

The invention discloses a gas well full-life-cycle downhole throttling production device and a using method thereof. The gas well full-life-cycle downhole throttling production device comprises a dispenser and a downhole throttle; the lower end of the dispenser is provided with two symmetric strip-shaped grooves, and the dispenser and the downhole throttle are fixedly connected together through apin. The gas well full-life-cycle downhole throttling production device adopts a special material V-shaped sealing ring to form self-sealing seal, and the dispensing success rate is high; the sealingsurface is short and high in hardness, releasing force is small during salvaging, and the salvage success rate is high; and meanwhile, the gas well full-life-cycle downhole throttling production device has the effects that during salvage failure, a large channel is formed by knocking off a gas nozzle, and smooth implementation of a drainage gas extraction process of a gas well in the middle and later periods is not affected, the gas well full-life-cycle downhole throttling production device is simple in structure, on-site operation is convenient, and cost reduction and efficiency increasing are significant.

Description

【Technical field】 [0001] The invention belongs to the technical field of natural gas exploitation, and relates to a preset downhole throttling device, in particular to a gas well life cycle downhole throttling production device and a use method thereof. 【Background technique】 [0002] In order to reduce pressure, throttle, and limit production in natural gas exploitation, downhole chokes are often installed in gas well shafts. Downhole chokes are divided into slip chokes and preset chokes according to different sealing methods. The slip restrictor is set and anchored at any position in the production string. The pre-set choke is set and anchored in the pre-set mandrel that is connected to the production string and lowered into the well together with the production string. Slip chokes were widely used in the early stage of Sulige gas field development. The popularization and application shows that the chokes are difficult to salvage and easily cause downhole accidents. The ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the fishing success rate in the prior art cannot reach the expected goal, and to provide a gas well life-cycle downhole throttling production device and its use method. The function of affecting the normal production of gas wells can meet the production needs of the whole life cycle of gas wells, such as throttling and pressure reduction in the early stage, implementation of drainage and gas recovery measures in the middle stage, and pipe lifting with pressure in the later stage.

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