E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 33/13 (2006.01) E21B 34/14 (2006.01)
Patent
CA 2212199
The present invention relates to tools and methods for stabilizing incompetent or otherwise unstable subterranean zones or formations penetrated by a well bore during drilling. The methods basically comprise drilling the well bore through an unstable subterranean zone or formation when it is encountered, pumping a fluid through a well stabilization tool while moving the tool through the portion of the well bore in the unstable zone or formation whereby fluid jets formed by the well stabilization tool enlarge the diameter of the well bore by fluid jet erosion, pumping a hardenable cementitious material through the well stabilization tool while moving the tool through the enlarged portion of the well bore whereby the enlarged portion is filled with the hardenable cementitious material, allowing the cementitious material to harden and then drilling the well bore through the hardened cementitious material.
Cette invention concerne des procédés et outils de stabilisation des couches incompétentes ou instables en cours de forage de puits. Il s'agit essentiellement, lorsque l'outil de forage traverse une couche instable, d'y descendre un outil de stabilisation de puits dans lequel on fait circuler un fluide, lequel, projeté en jets par l'outil de stabilisation, agrandit le diamètre du puits par érosion, de pomper dans l'outil de stabilisation un liant hydraulique durcissable tout en déplaçant l'outil dans la partie élargie du puits de manière à la remplir de ce matériau, de laisser durcir le matériau, puis de poursuivre le forage à travers le matériau durci.
Beirute Robert M.
Duell Alan B.
Murray Dick A.
Ravi Krishna M.
Rogers Henry E.
Halliburton Energy Services Inc.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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