Method of construction of multiple-string wells

PCT No. PCT/SU88/00234 Sec. 371 Date Sep. 20, 1989 Sec. 102(e) Date Sep. 20, 1989 PCT Filed Nov. 22, 1988 PCT Pub. No. WO89/06739 PCT Pub. Date Jul. 27, 1989.The method of well construction includes the steps of drilling the rock and consolidating it with a conductor casing, a surface casing string...

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Hauptverfasser:	ARZAMASTSEV, FILIPP G, SANNIKOV, RASHIT K, JUSUPOV, IZIL G, ZAINULLIN, ALBERT G, UTESHEV, RASHID A, PEROV, ANATOLY V, MAVLJUTOV, MIDKHAT R, URAZGILDIN, ILYAS A, ABDRAKHMANOV, GABRASHIT S, GALIAKBAROV, VIL F, IBAT ULLIN, RUSTAM K
Format:	Patent
Sprache:	eng
Schlagworte:	EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
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Zusammenfassung:	PCT No. PCT/SU88/00234 Sec. 371 Date Sep. 20, 1989 Sec. 102(e) Date Sep. 20, 1989 PCT Filed Nov. 22, 1988 PCT Pub. No. WO89/06739 PCT Pub. Date Jul. 27, 1989.The method of well construction includes the steps of drilling the rock and consolidating it with a conductor 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 expanding them. The drilling of the rock after the casing-in of the well with the conductor casing and the surface casing string is preformed 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 of the well as they are exposed by the drilling.