Wellhead wax deposition prevention mechanism and wax deposition prevention process

Abstract

The invention relates to a wellhead wax deposition prevention mechanism and a wax deposition prevention process. The wax deposition prevention mechanism comprises an underground casing pipe, wherein the underground casing pipe is arranged outside an oil pipe in a sleeving way; the top of the oil pipe is connected with a feeding main pipe; the feeding main pipe is connected with an air inlet pipe and a medicine inlet pipe in parallel; an air inlet valve is arranged on the air inlet pipe; the medicine inlet pipe is further sequentially connected with a power device, a medicine adding tank and a medicine adding device; a discharging pipe is connected onto the underground casing pipe; and a discharging valve and a discharging pump are arranged on the discharging pipe. The wellhead wax deposition prevention process comprises the following steps that firstly, the high-temperature characteristic of hot steam is utilized; the wax deposition in the oil pipe is pre-melted at the small flow introducing quantity; the pretreatment effect is achieved; then, a wax removing agent is introduced; the hot cleaning wax removal effect is continuously achieved under the effect of high-temperature hot steam; meanwhile, the hot wax removing agent is firstly heated and sealed for a period of time in the oil pipe, so that the falling and melting completeness of the wax deposition on the pipe wall is ensured; during the discharging, the wax clamping phenomenon due to incomplete wax deposition melting can also be prevented; and the melted wax liquid is enabled to be smoothly discharged out of the oil pipe.

Description

technical field [0001] The invention relates to the technical field of wellhead anti-wax formation, in particular to a wellhead anti-wax formation mechanism and an anti-wax formation process. Background technique [0002] In the process of crude oil production, oil well fouling seriously affects the normal production of oil wells. Implementing anti-scaling measures for oil wells is an important means to ensure the normal production of oil wells. At present, the most important oil well scale cleaning measure is well flushing, and acid scale cleaning agents are generally used for scaling wells for well flushing. However, well flushing has disadvantages such as cumbersome construction, high cost, and short cycle. Mechanical descaling has some problems for equipment tool damage, jamming and high capital expenditure. The effect of other cleaning methods is not obvious. Chemical anti-scaling is favored by major oil fields due to its advantages of low cost, safety and reliabili...

AI Technical Summary

Problems solved by technology

[0003] However, the delivery of existing medicament adding devices is unstable

Moreover, the wax removal process is not thorough, the wax removal effect is poor and the cycle is long

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