Thermal recovery well filling and sand prevention tool

• Main Authors: CHEN WEI, SONG QINGXIN, SUN XIUZHAO, WEI QINGCAI, LI CHANGYOU, MA DING, WANG BING, ZHANG XIJUAN, WANG YONG, KANG JIE
• Format: Patent
• Language: Chinese; English
• Published: 20.03.2018
• 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 thermal recovery well filling and sand prevention tool. The tool comprises a center tube, an overflowing outer cavity, a sealing sleeve, a slip mechanism, a leather cup and aconversion mechanism, wherein the outer side of the central tube is sleeved with the overflowing outer cavity, and the outer wall of the overflowing outer cavity is sleeved with the slip mechanism; the outer side of the upper end of the slip mechanism is sleeved with the sealing sleeve, and the outer side of the lower end of the slip mechanism is sleeved with the leather cup; the lower end of thecentral tube and the lower end of the overflowing outer cavity are connected with the conversion mechanism at the same time; when filling and sand prevention are carried out, the sealing sleeve is arubber sealing piece, and when subsequent steam injection is carried out, the sealing sleeve is a lead seal sealing piece. The tool has the advantages of being safe, environmentally friendly, simple in construction, resistant t