Drainage gas recovery method and device of air-lift combination of foam and plunger

A technology for drainage and gas production and plunger, which is applied to the valve device of wellbore/well, the components of pumping device for elastic fluid, and the production of fluid, etc. In order to reduce the gas channeling, narrow the gap, and improve the recovery factor

Active Publication Date: 2018-05-01
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The lower limit of the application of plunger gas lift technology at this stage is that the daily gas production is greater than 1000m 3 For gas wells with daily gas production less than 1000m 3 For gas wells with lower yields, sin

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  • Drainage gas recovery method and device of air-lift combination of foam and plunger
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  • Drainage gas recovery method and device of air-lift combination of foam and plunger

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with specific examples, and the given examples are only to illustrate the present invention, rather than to limit the scope of the present invention.

[0027] refer to Figure 1 to Figure 5 The foam and plunger gas lift combined drainage and gas production device of the present invention is composed of a blowout preventer 1 , a first gate valve 2 , a ball valve 3 , a second gate valve 4 , a plunger 5 and a seating buffer 6 . The plunger 5 is embedded with a solid foam discharge rod, and the plunger 5 is composed of a plunger body 51 , a channel 52 , a solid foam discharge rod 53 , a turbulent flow sealing groove 54 , and a base 55 .

[0028] The blowout preventer 1, the first gate valve 2, and the second gate valve 4 are connected in sequence and then connected to the oil pipe. A gas tree 7 is connected between the first gate valve 2 and the second gate valve 4. The ball valve 3 is installed on the gas...

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Abstract

The invention provides a drainage gas recovery method and device of an air-lift combination of foam and plunger; a solid discharging bubble stick is embedded in to the plunger; the plunger is put intoan oil tube to work during producing; the plunger embedded with the solid discharging bubble stick is under the action of the gravity, the solid discharging bubble stick is fully contacted with hydrops located at shaft bottom through a passage, and foams are formed; the elastic compact foams are filled with the gap between the plunger and the wall of the oil tube all the time, and a gap between the plunger and a shaft is reduced, and liquid slipping and gas channeling are effectively reduced; compared with a conventional plunger, and the liquid lifting efficiency is further improved; and stable production of gas well less than 1000m3 is realized, and the recovery efficiency of gas field is further improved.

Description

technical field [0001] The invention belongs to the technical field of natural gas field development, and relates to a foam and plunger gas lift combined drainage and gas recovery method and device. Background technique [0002] With the development of gas fields, the production capacity of gas wells has been decreasing year by year. Some gas wells have entered the low-pressure and low-yield production stage. pressure, and limit its production capacity, which will eventually lead to water flooding and shutdown of gas wells, or even scrapping, resulting in huge economic losses. Drainage gas recovery is an effective method to solve wellbore fluid accumulation, and it is also an important measure to tap the production potential of water-bearing gas reservoirs and improve recovery, and is a key technology for stable production of gas fields. [0003] Plunger gas lift is a drainage gas recovery measure, and it is also a kind of intermittent gas lift; it is to put the plunger int...

Claims

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Application Information

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IPC IPC(8): E21B43/00E21B34/02E21B43/12E21B43/22F04B53/00F04B53/14
CPCE21B34/02E21B43/00E21B43/122E21B43/16E21B2200/04F04B53/00F04B53/143
Inventor 田伟杨旭东李旭日李耀德韩强辉崔丽春贾友亮杨亚聪惠艳妮李辰
Owner PETROCHINA CO LTD
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