Method for leaking stoppage by pre-arranging plugging gel and tightly adding cement paste

• Main Authors: MIAO QINGLIN, WANG GUOBIN, RONG KESHENG, LIU ZHILIANG, ZHANG GUIYI, ZHANG WEI, LI YUEMING, LI TAO
• Format: Patent
• Language: Chinese; English
• Published: 29.01.2014
• Subjects: ADHESIVES; CHEMISTRY; DYES; EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MINING; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS; PAINTS; POLISHES

The invention relates to the technical field of petroleum drilling engineering leaking stoppage, in particular to a method for leaking stoppage by pre-arranging plugging gel and tightly adding cement paste. The method comprises the following steps that a plugging gel pump is arranged downwards to an underground stratum leak channel, then the cement paste is tightly added to the position of the plugging gel in a well, and the leak channel is plugged after the cement paste is solidified; the plugging gel is obtained by evenly mixing fluid into the well and organoboron cross-linking agents. The plugging process is shown in figure 4 and figure 5. The method is suitable for plugging the leak of wide underground cracks and a karst cave stratum, the plugging gel firstly plugs the entrance of a leak layer, the cement paste is prevented from being leaked into the stratum, then the cement paste is tightly added to carry out plugging, the defect that existing leaking stoppage paste cannot be accumulated at the entrance