56 copyrightc 2005 by ali ghalambor boyun guo 28 2

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Unformatted text preview: blowouts. 56 Copyright(c) 2005 by Ali Ghalambor & Boyun Guo 28 2. Introduction A kick can be defined as a well control problem in which the pressure found within the drilled rock is greater than the mud hydrostatic pressure acting on the boroehole in the rock. A blowout is the result of an uncontrolled kick. 57 3. Caused of Kicks A. Introduction The formation pressure will exceed the mud pressure and a kick will occur. 58 Copyright(c) 2005 by Ali Ghalambor & Boyun Guo 29 B. Insufficient mud weight Insufficient mud weight is one of the predominant causes of kicks. A permeable zone was drilled while using a mud weight that exerted less pressure than the formation pressure within the sand zone. 59 C. Improper Hole Fill-up The drill pipe is pulled put of the hole the mud level falls due to the fact that the drill pipe steel had displaced some amount of mud. With the pipe no longer in the hole, the mud must fill the spaces where the pipe had been. Therefore, the overall mud level decreases, and as a consequence, the hydrostatic pressure of the mud also decreased due to a shorter colum...
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