Method of well construction

Details Method of well construction Method of well construction

E - Fixed Constructions

21

B

166/16

E21B 33/13 (2006.01) E21B 7/00 (2006.01) E21B 17/00 (2006.01) E21B 29/10 (2006.01) E21B 33/14 (2006.01) E21B 43/10 (2006.01)

Patent

CA 1301635

ABSTRACT The method of well construction includes the steps of drilling the rock and consolidating it with a con- ductor casing, a surface casing string and a flow string, and isolating the troublesome zones of the well with profile pipes being reamed in the course of their setting. The reaming of the profile pipes is effected by building up a pressure drop across them and subsequently expan- ding them. The drilling of the rock after the casing-in of the well with the conductor casing and the surface casing string 19 performed with a bit of one and the same diameter, with the troublesome zones being reamed to a diameter equalling the outer diameter of the reamed profile pipes which are successively set in all the troublesome zones as they are exposed by the drilling.

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