Plunger gas-lifting draining device used for horizontal gas well and production method

• Main Authors: LI CHEN, LI YAODE, WEI YAMING, LIU SHUANGQUAN, LI LI, BAI XIAOHONG, TIAN WEI, YANG YACONG, HAN QIANGHUI
• Format: Patent
• Language: Chinese; English
• Published: 05.01.2018
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The invention discloses a plunger gas-lifting draining device used for a horizontal gas well and a production method. The device comprises a self-buffering plunger and a uniflow device which are arranged in an oil pipe, the oil pump comprises two sections of pipelines who have different pipe diameters and are connected by a reducing short section, the self-buffering plunger is arranged in the part, which is located at the upper part of the reducing short section, of the pipeline, the uniflow device is used for controlling a gas liquid to flow unidirectionally from bottom to top and arranged inthe part, located at the lower part of the reducing short section, of the pipeline, the shaft accumulated fluid can be lifted to the upper part of the uniflow device by the own energy of the gas well, is delayed, and is lifted to the well mouth by the aid of the self-buffering plunger, and drainage production is completed. A downhole tool of an existing plunger device is simplified; the functionof gas liquid unidirection