E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
33/137, 166/3
E21B 47/04 (2006.01) E21B 47/00 (2006.01)
Patent
CA 1094799
ABSTRACT OF THE DISCLOSURE An abandonment plug is placed by the drill pipe which is then raised above the plug until some hardening of the plug takes place. A detection or measuring unit is lowered down the hole through the drill pipe by a winch system such as a wireline device, until it contacts the plug at which time a weight measurement indicates that an obstruction has been reached. A temperature measuring de- vice will indicate a rise in temperature if the plug has been encountered, due to the fact that the hardening cement gives off heat. Further, by means of adding a radio active material to the cement, a radiation detector will indicate an increase in the counting rate. The combination of all three measurements confirms that the plug has been placed and also the depth at which it has been placed. Due to the relative lightweight of the detection device on the end of the cable compared to the relatively heavyweight of the drill pipe string which is normally used to determine the setting of the plug, the waiting time for the cement to harden enough to support the weight of the device is re- duced considerably.
298698
Ade & Company
Sungroup Energy Services Company
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