Method for preventing wax precipitation of production string of gas production well

Abstract

The invention provides a method for preventing wax precipitation of a production pipe column of a gas production well. The method comprises the steps that firstly, a heating pipe cable hanging assembly, a heating pipe cable well plugging device and a heating pipe cable blowout prevention box are installed on a main valve; secondly, a main valve is opened, and the heating pipe cable is lowered to a designated position; thirdly, the heating pipe cable blowout prevention box is lifted upwards, and the heating pipe cable is cut off from the bottom of the heating pipe cable blowout prevention box; fourthly, a heating pipe cable slip connector, a heating pipe cable hanger and a heating pipe cable hanger fishing tool are installed on the upper portion of the heating pipe cable; fifthly, the heating pipe cable hanger fishing tool and the heating pipe cable hanger are connected to a wellhead, and the heating pipe cable hanger is set to a heating pipe cable hanging assembly; 6, the heating pipe cable hanger fishing tool is pulled out, and equipment above a heating pipe cable hanging assembly is disassembled; and 7, an anti-jacking flange, a pressure gauge and a cable sealing valve are installed on the heating pipe cable suspension assembly, and after the pressure test is qualified, a production pipe column is installed for continuous production.

Description

technical field [0001] The invention relates to the field of oil field exploitation, in particular to a method for preventing wax deposition in a production pipe string of a gas production well. Background technique [0002] During the production process of gas wells with high light hydrocarbon content in the oilfield, the wax precipitation point of the produced gas is relatively high, while the temperature of the well section near the wellhead is low, resulting in the precipitation of a large amount of wax in this well section, which will block the production string or even delay the production process. Production. There are three conventional wax removal methods on site: 1. Mechanical wax removal; 2. Thermal cycle wax removal; 3. Ultrasonic wax removal. [0003] Mechanical wax removal: use specific wax removal tools such as wax scrapers, etc., and lower the steel wire rope into the production pipe string to scrape the wax points back and forth to achieve the purpose of re...

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