Pollution-free well washing device

• Main Authors: CHEN WEI, WANG WENGANG, ZHOU XIANG, WANG LI, YUAN MING, HUANG XIAOZHAO, GAO CHAOYONG, YU SHURONG, LI JIANAN, HU SHENGYONG, MENG YUEYUE, QU MINGYI, QIU ZHINING, XU ZHAOQIANG, JIANG LEI, XU YANSONG, YAN HAIFENG, WU XIAOYAN
• Format: Patent
• Language: English
• Published: 12.08.2015
• 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 pollution-free well washing device which comprises an upper reducer union, a connecting body, a lifting sub, a packer, an upper body, a lower body, a lower reducer union and a central pipe. The outer side of the upper end of the upper reducer union is fixed to a two-way connector, the inner side of the upper end of the connecting body is fixed to the lower end of the upper reducer union, an opening is formed in the lateral wall of the connecting body, the outer side of the upper end of the lifting sub is fixed to the lower end of the connecting body, the inner side of the upper end of the packer is fixed to the lower end of the lifting sub, the inner side of the upper end of the upper body is fixed to the lower end of the packer, the outer side of the upper end of the lower body is connected with the lower end of the upper body, an accommodating portion is formed in the outer wall of the lower body, a valve ball seat is arranged in the accommodating portion, the inner side of the upper end of the lower reducer union is fixed to the lower end of the lower body, the outer side of the lower end of the lower reducer union is fixed to a sand storing barrel, the outer side of the upper end of the central pipe is fixed to the inner side of the lower end of the upper reducer union, and the lower end of the central pipe extends into the lower body. The pollution-free well washing device can be matched with long-plunger sand-preventing oil well pumps to achieve pollution-free well washing.