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compressible chocks arrows and procedures for use of arrows in underground cavities
compressible chocks arrows and procedures for use of arrows in underground cavities
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机译:可压缩的塞孔箭头以及在地下洞中使用箭头的步骤
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摘要
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, and a foam body attached to the mandrel. Optionally, an elastic tether can be included, inter alia, to absorb the deformation of the foam body.
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