Self-setting thermal packers help cyclic-steam operations

Thermally activated packers are helping recover heavy oil in cyclic steam-injection wells in China. The packers were developed by one of the units of the Liaohe Petroleum Exploitation Bureau (LPEB). These packers replace the mechanically and hydraulic-set packers used during the 1980s. The new packers are small in size (Fig. 1 and Fig. 2 [22,345 bytes] ), and LPEB has found them to have reliable sealing properties. Multiple packers can be run in a well. In the Liaohe area, as many as four

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