E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 33/16 (2006.01)
Patent
CA 2545376
The present invention relates generally to subterranean well construction, and more particularly, to improved darts and methods of using these darts in subterranean wells. In one embodiment, the present invention provides a dart for activating a plug located within a subterranean well bore, the dart comprising a mandrel (10), and, a foam body (13) attached to the mandrel. Optionally, an elastic tether (12) can be included, inter alia, to absorb the deformation of the foam body.
L'invention porte en général sur la construction de puits souterrains et, en particulier, sur des fléchettes améliorées et sur des procédés d'utilisation de ces fléchettes dans des puits souterrains. Dans un mode de réalisation, l'invention concerne une fléchette qui permet d'actionner un bouchon placé à l'intérieur d'un puits de forage souterrain, la fléchette comprenant un mandrin (10) et un corps en mousse (13) attaché au mandrin. Facultativement, une attache élastique (12) peut être incluse, entre autres pour absorber la déformation du corps en mousse.
Halliburton Energy Services Inc.
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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